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chore: Prune old contracts (#304)

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Prune exchange-libs
deploy migrations at specific address
remove exchange-libs, moving LibMath into Utils
Remove staking order-utils multisig and remaining asset-proxy
This commit is contained in:
Jacob Evans
2021-08-18 10:33:47 +10:00
committed by GitHub
parent aae46bef84
commit 68656b4a4d
741 changed files with 586 additions and 121272 deletions
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45
README.md
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@@ -2,7 +2,7 @@
---
[0x][website-url] is an open protocol that facilitates trustless, low friction exchange of Ethereum-based assets. For more information on how it works, check out the [0x protocol specification](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/v2-specification.md).
[0x][website-url] is an open protocol that facilitates trustless, low friction exchange of Ethereum-based assets. For more information on how it works, check out the [0x protocol specification](https://protocol.0x.org/).
This repository is a monorepo including the 0x protocol smart contracts and numerous developer tools. Each public sub-package is independently published to NPM.
@@ -15,40 +15,31 @@ This repository is a monorepo including the 0x protocol smart contracts and nume
## Packages
Visit our [developer portal](https://0x.org/docs/tools/order-utils) for a comprehensive list of core & community maintained packages. All packages maintained with this monorepo are listed below.
Visit our [developer portal](https://0x.org/docs/) for a comprehensive list of core & community maintained packages. All packages maintained with this monorepo are listed below.
### Solidity Packages
These packages are all under development. See [/contracts/README.md](/contracts/README.md) for a list of deployed packages.
| Package | Version | Description |
| ------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [`@0x/contracts-asset-proxy`](/contracts/asset-proxy) | [![npm](https://img.shields.io/npm/v/@0x/contracts-asset-proxy.svg)](https://www.npmjs.com/package/@0x/contracts-asset-proxy) | [`AssetProxy`](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/v2-specification.md#assetproxy) contracts used within the protocol |
| [`@0x/contracts-erc20`](/contracts/erc20) | [![npm](https://img.shields.io/npm/v/@0x/contracts-erc20.svg)](https://www.npmjs.com/package/@0x/contracts-erc20) | Implementations of various ERC20 tokens |
| [`@0x/contracts-erc721`](/contracts/erc721) | [![npm](https://img.shields.io/npm/v/@0x/contracts-erc721.svg)](https://www.npmjs.com/package/@0x/contracts-erc721) | Implementations of various ERC721 tokens |
| [`@0x/contracts-erc1155`](/contracts/erc1155) | [![npm](https://img.shields.io/npm/v/@0x/contracts-erc1155.svg)](https://www.npmjs.com/package/@0x/contracts-erc1155) | Implementations of various ERC1155 tokens |
| [`@0x/contracts-exchange`](/contracts/exchange) | [![npm](https://img.shields.io/npm/v/@0x/contracts-exchange.svg)](https://www.npmjs.com/package/@0x/contracts-exchange) | The [`Exchange`](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/v2-specification.md#exchange) contract used for settling trades within the protocol |
| [`@0x/contracts-exchange-forwarder`](/contracts/exchange-forwarder) | [![npm](https://img.shields.io/npm/v/@0x/contracts-exchange-forwarder.svg)](https://www.npmjs.com/package/@0x/contracts-exchange-forwarder) | A [`Forwarder`](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/forwarder-specification.md) contract used to simplify UX for interacting with the protocol |
| [`@0x/contracts-exchange-libs`](/contracts/exchange-libs) | [![npm](https://img.shields.io/npm/v/@0x/contracts-exchange-libs.svg)](https://www.npmjs.com/package/@0x/contracts-exchange-libs) | Protocol specific libraries used within the [`Exchange`](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/v2-specification.md#exchange) contract |
| [`@0x/contracts-extensions`](/contracts/extensions) | [![npm](https://img.shields.io/npm/v/@0x/contracts-extensions.svg)](https://www.npmjs.com/package/@0x/contracts-extensions) | Contracts that interact with and extend the functionality of the core protocol |
| [`@0x/contracts-multisig`](/contracts/multisig) | [![npm](https://img.shields.io/npm/v/@0x/contracts-multisig.svg)](https://www.npmjs.com/package/@0x/contracts-multisig) | Various implementations of multisignature wallets, including the [`AssetProxyOwner`](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/v2-specification.md#assetproxyowner) contract that has permissions to upgrade the protocol |
| [`@0x/contracts-test-utils`](/contracts/test-utils) | [![npm](https://img.shields.io/npm/v/@0x/contracts-test-utils.svg)](https://www.npmjs.com/package/@0x/contracts-test-utils) | TypeScript/Javascript shared utilities used for testing contracts |
| [`@0x/contracts-utils`](/contracts/utils) | [![npm](https://img.shields.io/npm/v/@0x/contracts-utils.svg)](https://www.npmjs.com/package/@0x/contracts-utils) | Generic libraries and utilities used throughout all of the contracts |
| [`@0x/contracts-coordinator`](/contracts/coordinator) | [![npm](https://img.shields.io/npm/v/@0x/contracts-coordinator.svg)](https://www.npmjs.com/package/@0x/contracts-coordinator) | A contract that allows users to execute 0x transactions with permission from a Coordinator |
| [`@0x/contracts-dev-utils`](/contracts/dev-utils) | [![npm](https://img.shields.io/npm/v/@0x/contracts-dev-utils.svg)](https://www.npmjs.com/package/@0x/contracts-dev-utils) | A contract contains utility functions for developers (such as validating many orders using a single eth_call) |
| [`@0x/contracts-staking`](/contracts/staking) | [![npm](https://img.shields.io/npm/v/@0x/contracts-staking.svg)](https://www.npmjs.com/package/@0x/contracts-staking) | Implements the stake-based liquidity incentives defined by [`ZEIP-31`](https://github.com/0xProject/ZEIPs/issues/31) |
| Package | Version | Description |
| --------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------- |
| [`@0x/contracts-zero-ex`](/contracts/zero-ex) | [![npm](https://img.shields.io/npm/v/@0x/contracts-zero-ex.svg)](https://www.npmjs.com/package/@0x/contracts-zero-ex) | The contracts used for settling trades within the protocol |
| [`@0x/contracts-erc20`](/contracts/erc20) | [![npm](https://img.shields.io/npm/v/@0x/contracts-erc20.svg)](https://www.npmjs.com/package/@0x/contracts-erc20) | Implementations of various ERC20 tokens |
| [`@0x/contracts-test-utils`](/contracts/test-utils) | [![npm](https://img.shields.io/npm/v/@0x/contracts-test-utils.svg)](https://www.npmjs.com/package/@0x/contracts-test-utils) | TypeScript/Javascript shared utilities used for testing contracts |
| [`@0x/contracts-utils`](/contracts/utils) | [![npm](https://img.shields.io/npm/v/@0x/contracts-utils.svg)](https://www.npmjs.com/package/@0x/contracts-utils) | Generic libraries and utilities used throughout all of the contracts |
### TypeScript/Javascript Packages
#### 0x-specific packages
| Package | Version | Description |
| -------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------- |
| -------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------- |
| [`@0x/asset-swapper`](/packages/asset-swapper) | [![npm](https://img.shields.io/npm/v/@0x/asset-swapper.svg)](https://www.npmjs.com/package/@0x/asset-swapper) | Package used to find and create aggregated swaps |
| [`@0x/protocol-utils`](/packages/protocol-utils) | [![npm](https://img.shields.io/npm/v/@0x/protocol-utils.svg)](https://www.npmjs.com/package/@0x/protocol-utils) | A set of utilities for generating, parsing, signing and validating 0x orders |
| [`@0x/contract-addresses`](/packages/contract-addresses) | [![npm](https://img.shields.io/npm/v/@0x/contract-addresses.svg)](https://www.npmjs.com/package/@0x/contract-addresses) | A tiny utility library for getting known deployed contract addresses for a particular network. |
| [`@0x/contract-wrappers`](/packages/contract-wrappers) | [![npm](https://img.shields.io/npm/v/@0x/contract-wrappers.svg)](https://www.npmjs.com/package/@0x/contract-wrappers) | JS/TS wrappers for interacting with the 0x smart contracts |
| [`@0x/order-utils`](/packages/order-utils) | [![npm](https://img.shields.io/npm/v/@0x/order-utils.svg)](https://www.npmjs.com/package/@0x/order-utils) | A set of utilities for generating, parsing, signing and validating 0x orders |
| [`@0x/migrations`](/packages/migrations) | [![npm](https://img.shields.io/npm/v/@0x/migrations.svg)](https://www.npmjs.com/package/@0x/migrations) | Migration tool for deploying 0x smart contracts on private testnets |
| [`@0x/contract-artifacts`](/packages/contract-artifacts) | [![npm](https://img.shields.io/npm/v/@0x/contract-artifacts.svg)](https://www.npmjs.com/package/@0x/contract-artifacts) | 0x smart contract compilation artifacts | |
| [`@0x/contract-artifacts`](/packages/contract-artifacts) | [![npm](https://img.shields.io/npm/v/@0x/contract-artifacts.svg)](https://www.npmjs.com/package/@0x/contract-artifacts) | 0x smart contract compilation artifacts | |
## Usage
@@ -92,7 +83,7 @@ yarn build
To build a specific package:
```bash
PKG=@0x/contract-wrappers yarn build
PKG=@0x/asset-swapper yarn build
```
To build all contracts packages:
@@ -115,7 +106,7 @@ To watch a specific package and all it's dependent packages:
PKG=[NPM_PACKAGE_NAME] yarn watch
e.g
PKG=@0x/contract-wrappers yarn watch
PKG=@0x/asset-swapper yarn watch
```
### Clean
@@ -129,7 +120,7 @@ yarn clean
Clean a specific package
```bash
PKG=0x.js yarn clean
PKG=@0x/asset-swapper yarn clean
```
### Rebuild
@@ -143,7 +134,7 @@ yarn rebuild
To re-build (clean & build) a specific package & it's deps:
```bash
PKG=@0x/contract-wrappers yarn rebuild
PKG=@0x/asset-swapper yarn rebuild
```
### Lint
@@ -157,7 +148,7 @@ yarn lint
Lint a specific package:
```bash
PKG=@0x/contract-wrappers yarn lint
PKG=@0x/asset-swapper yarn lint
```
### Run Tests
@@ -171,7 +162,7 @@ yarn test
Run a specific package's test:
```bash
PKG=@0x/contract-wrappers yarn test
PKG=@0x/asset-swapper yarn test
```
Run all contracts packages tests:

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contracts/README.md
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@@ -1,16 +1,3 @@
#### Deployed Contract Packages
| Contract | Package | Version | Git Tag |
| --------------- | ------------------------------------------------------------------- | -------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------- |
| AssetProxyOwner | [`@0x/contracts-multisig`](/contracts/multisig) | [v1.0.2](https://www.npmjs.com/package/@0x/contracts-multisig/v/1.0.2) | [@0x/contracts-multisig@1.0.2](https://github.com/0xProject/0x-monorepo/releases/tag/@0x/contracts-multisig@1.0.2) |
| ERC20Proxy | [`@0x/contracts-asset-proxy`](/contracts/asset-proxy) | [v1.0.1](https://www.npmjs.com/package/@0x/contracts-asset-proxy/v/1.0.1) | [@0x/contracts-asset-proxy@1.0.1](https://github.com/0xProject/0x-monorepo/releases/tag/@0x/contracts-asset-proxy@1.0.1) |
| ERC721Proxy | [`@0x/contracts-asset-proxy`](/contracts/asset-proxy) | [v1.0.1](https://www.npmjs.com/package/@0x/contracts-asset-proxy/v/1.0.1) | [@0x/contracts-asset-proxy@1.0.1](https://github.com/0xProject/0x-monorepo/releases/tag/@0x/contracts-asset-proxy@1.0.1) |
| Exchange | [`@0x/contracts-exchange`](/contracts/exchange) | [v1.0.1](https://www.npmjs.com/package/@0x/contracts-exchange/v/1.0.1) | [@0x/contracts-exchange@1.0.1](https://github.com/0xProject/0x-monorepo/releases/tag/@0x/contracts-exchange@1.0.1) |
| DutchAuction | [`@0x/contracts-extensions`](/contracts/extensions) | [v1.0.2](https://www.npmjs.com/package/@0x/contracts-extensions/v/1.0.2) | [@0x/contracts-extensions@1.0.2](https://github.com/0xProject/0x-monorepo/releases/tag/@0x/contracts-extensions@1.0.2) |
| Forwarder | [`@0x/contracts-exchange-forwarder`](/contracts/exchange-forwarder) | [v1.0.1](https://www.npmjs.com/package/@0x/contracts-exchange-forwarder/v/1.0.1) | [@0x/contracts-exchange-forwarder@1.0.1](https://github.com/0xProject/0x-monorepo/releases/tag/@0x/contracts-exchange-forwarder@1.0.1) |
| MultiAssetProxy | [`@0x/contracts-asset-proxy`](/contracts/asset-proxy) | [v1.0.1](https://www.npmjs.com/package/@0x/contracts-asset-proxy/v/1.0.1) | [@0x/contracts-asset-proxy@1.0.1](https://github.com/0xProject/0x-monorepo/releases/tag/@0x/contracts-asset-proxy@1.0.1) |
| ZRXToken | [`@0x/contracts-erc20`](/contracts/erc20) | [v1.0.1](https://www.npmjs.com/package/@0x/contracts-erc20/v/1.0.1) | [@0x/contracts-erc20@1.0.1](https://github.com/0xProject/0x-monorepo/releases/tag/@0x/contracts-erc20@1.0.1) |
#### Development
Building solidity files will update the contract artifact in `{package-name}/generated-artifacts/{contract}.json`, but does not automatically update the `contract-artifacts` or `contract-wrappers` packages, which are generated from the artifact JSON. See `contract-artifacts/README.md` for instructions on updating these packages.

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contracts/TESTING.md
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@@ -1,48 +0,0 @@
# Contracts testing options
## Revert stack traces
If you want to see helpful stack traces (incl. line number, code snippet) for smart contract reverts, run the tests with:
```
yarn test:trace
```
**Note:** This currently slows down the test runs and is therefore not enabled by default.
## Backing Ethereum node
By default, our tests run against an in-process [Ganache](https://github.com/trufflesuite/ganache-core) instance. In order to run the tests against [Geth](https://github.com/ethereum/go-ethereum), first follow the instructions in the README for the devnet package to start the devnet Geth node. Then run:
```bash
TEST_PROVIDER=geth yarn test
```
## Code coverage
In order to see the Solidity code coverage output generated by `@0x/sol-coverage`, run:
```
yarn test:coverage
```
## Gas profiler
In order to profile the gas costs for a specific smart contract call/transaction, you can run the tests in `profiler` mode.
**Note:** Traces emitted by ganache have incorrect gas costs so we recommend using Geth for profiling.
```
TEST_PROVIDER=geth yarn test:profiler
```
You'll see a warning that you need to explicitly enable and disable the profiler before and after the block of code you want to profile.
```typescript
import { profiler } from './utils/profiler';
profiler.start();
// Some call to a smart contract
profiler.stop();
```
Without explicitly starting and stopping the profiler, the profiler output will be too busy, and therefore unusable.

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contracts/asset-proxy/.npmignore
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@@ -1,10 +0,0 @@
# Blacklist all files
.*
*
# Whitelist lib
!lib/**/*
# Whitelist Solidity contracts
!contracts/src/**/*
# Blacklist tests in lib
/lib/test/*
# Package specific ignore

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contracts/asset-proxy/.solhintignore
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@@ -1,2 +0,0 @@
# solhint can't parse `abi.decode` syntax.
contracts/src/ERC1155Proxy.sol

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contracts/asset-proxy/CHANGELOG.json
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@@ -1,904 +0,0 @@
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},
{
"version": "3.5.0",
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{
"note": "Update `CurveBridge` to support more varied curves",
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},
{
"note": "Export DexForwarderBridgeContract",
"pr": 2656
},
{
"note": "Add BancorBridge and IBancorNetwork, ",
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},
{
"note": "Added `MStableBridge`",
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},
{
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{
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},
{
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},
{
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{
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},
{
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}
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},
{
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},
{
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},
{
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}
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{
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},
{
"note": "Fix `KyberBridge` incorrect `minConversionRate` calculation.",
"pr": 2412
}
],
"timestamp": 1578272714
},
{
"timestamp": 1576540892,
"version": "3.0.2",
"changes": [
{
"note": "Dependencies updated"
}
]
},
{
"timestamp": 1575931811,
"version": "3.0.1",
"changes": [
{
"note": "Dependencies updated"
}
]
},
{
"version": "3.0.0",
"changes": [
{
"note": "Implement `KyberBridge`.",
"pr": 2352
},
{
"note": "Drastically reduced bundle size by adding .npmignore, only exporting specific artifacts/wrappers/utils",
"pr": 2330
},
{
"note": "ERC20Wrapper and ERC1155ProxyWrapper constructors now require an instance of DevUtilsContract",
"pr": 2034
},
{
"note": "Disallow the zero address from being made an authorized address in MixinAuthorizable, and created an archive directory that includes an old version of Ownable",
"pr": 2019
},
{
"note": "Remove `LibAssetProxyIds` contract",
"pr": 2055
},
{
"note": "Compile and export all contracts, artifacts, and wrappers by default",
"pr": 2055
},
{
"note": "Remove unused dependency on IAuthorizable in IAssetProxy",
"pr": 1910
},
{
"note": "Add `ERC20BridgeProxy`",
"pr": 2220
},
{
"note": "Add `Eth2DaiBridge`",
"pr": 2221
},
{
"note": "Add `UniswapBridge`",
"pr": 2233
},
{
"note": "Replaced `SafeMath` with `LibSafeMath`",
"pr": 2254
}
],
"timestamp": 1575296764
},
{
"version": "2.3.0-beta.4",
"changes": [
{
"note": "Implement `KyberBridge`.",
"pr": 2352
},
{
"note": "Implement `DydxBridge`.",
"pr": 2365
}
],
"timestamp": 1575290197
},
{
"version": "2.3.0-beta.3",
"changes": [
{
"note": "Dependencies updated"
}
],
"timestamp": 1574238768
},
{
"version": "2.3.0-beta.2",
"changes": [
{
"note": "Drastically reduced bundle size by adding .npmignore, only exporting specific artifacts/wrappers/utils",
"pr": 2330
}
],
"timestamp": 1574030254
},
{
"version": "2.3.0-beta.1",
"changes": [
{
"note": "ERC20Wrapper and ERC1155ProxyWrapper constructors now require an instance of DevUtilsContract",
"pr": 2034
}
],
"timestamp": 1573159180
},
{
"version": "2.3.0-beta.0",
"changes": [
{
"note": "Disallow the zero address from being made an authorized address in MixinAuthorizable, and created an archive directory that includes an old version of Ownable",
"pr": 2019
},
{
"note": "Remove `LibAssetProxyIds` contract",
"pr": 2055
},
{
"note": "Compile and export all contracts, artifacts, and wrappers by default",
"pr": 2055
},
{
"note": "Remove unused dependency on IAuthorizable in IAssetProxy",
"pr": 1910
},
{
"note": "Add `ERC20BridgeProxy`",
"pr": 2220
},
{
"note": "Add `Eth2DaiBridge`",
"pr": 2221
},
{
"note": "Add `UniswapBridge`",
"pr": 2233
},
{
"note": "Replaced `SafeMath` with `LibSafeMath`",
"pr": 2254
}
],
"timestamp": 1570135330
},
{
"timestamp": 1568744790,
"version": "2.2.8",
"changes": [
{
"note": "Dependencies updated"
}
]
},
{
"timestamp": 1567521715,
"version": "2.2.7",
"changes": [
{
"note": "Dependencies updated"
}
]
},
{
"timestamp": 1566446343,
"version": "2.2.6",
"changes": [
{
"note": "Dependencies updated"
}
]
},
{
"timestamp": 1565296576,
"version": "2.2.5",
"changes": [
{
"note": "Dependencies updated"
}
]
},
{
"version": "2.2.4",
"changes": [
{
"note": "Updated calls to <contract wrapper>.deployFrom0xArtifactAsync to include artifact dependencies.",
"pr": 1995
}
],
"timestamp": 1564607468
},
{
"timestamp": 1563957393,
"version": "2.2.3",
"changes": [
{
"note": "Dependencies updated"
}
]
},
{
"timestamp": 1563193019,
"version": "2.2.2",
"changes": [
{
"note": "Dependencies updated"
}
]
},
{
"timestamp": 1563047529,
"version": "2.2.1",
"changes": [
{
"note": "Dependencies updated"
}
]
},
{
"version": "2.2.0",
"changes": [
{
"note": "Add `LibAssetProxyIds` contract",
"pr": 1835
},
{
"note": "Updated ERC1155 Asset Proxy. Less optimization. More explicit handling of edge cases.",
"pr": 1852
},
{
"note": "Implement StaticCallProxy",
"pr": 1863
}
],
"timestamp": 1563006338
},
{
"timestamp": 1558712885,
"version": "2.1.5",
"changes": [
{
"note": "Dependencies updated"
}
]
},
{
"timestamp": 1557961111,
"version": "2.1.4",
"changes": [
{
"note": "Dependencies updated"
}
]
},
{
"timestamp": 1557799313,
"version": "2.1.3",
"changes": [
{
"note": "Dependencies updated"
}
]
},
{
"version": "2.1.2",
"changes": [
{
"note": "Update tests to use contract-built-in `awaitTransactionSuccessAsync`",
"pr": 1797
},
{
"note": "Make `ERC721Wrapper.setApprovalForAll()` take an owner address instead of a token ID",
"pr": 1819
},
{
"note": "Automatically set unlimited proxy allowances in `ERC721.setBalancesAndAllowancesAsync()`",
"pr": 1819
},
{
"note": "Add `setProxyAllowanceForAllAsync()` to `ERC1155ProxyWrapper`.",
"pr": 1819
}
],
"timestamp": 1557507213
},
{
"version": "2.1.1",
"changes": [
{
"note": "Dependencies updated"
}
],
"timestamp": 1554997931
},
{
"version": "2.1.0",
"changes": [
{
"note": "Run Web3ProviderEngine without excess block polling",
"pr": 1695
}
],
"timestamp": 1553183790
},
{
"version": "2.0.0",
"changes": [
{
"note": "Do not reexport external dependencies",
"pr": 1682
},
{
"note": "Add ERC1155Proxy",
"pr": 1661
},
{
"note": "Bumped solidity version to ^0.5.5",
"pr": 1701
},
{
"note": "Integration testing for ERC1155Proxy",
"pr": 1673
}
],
"timestamp": 1553091633
},
{
"timestamp": 1551479279,
"version": "1.0.9",
"changes": [
{
"note": "Dependencies updated"
}
]
},
{
"timestamp": 1551299797,
"version": "1.0.8",
"changes": [
{
"note": "Dependencies updated"
}
]
},
{
"timestamp": 1551220833,
"version": "1.0.7",
"changes": [
{
"note": "Dependencies updated"
}
]
},
{
"timestamp": 1551130135,
"version": "1.0.6",
"changes": [
{
"note": "Dependencies updated"
}
]
},
{
"timestamp": 1549733923,
"version": "1.0.5",
"changes": [
{
"note": "Dependencies updated"
}
]
},
{
"version": "1.0.4",
"changes": [
{
"note": "Dependencies updated"
}
],
"timestamp": 1549547375
},
{
"version": "1.0.3",
"changes": [
{
"note": "Fake publish to enable pinning"
}
],
"timestamp": 1549504360
},
{
"timestamp": 1549452781,
"version": "1.0.2",
"changes": [
{
"note": "Dependencies updated"
}
]
},
{
"timestamp": 1549373905,
"version": "1.0.1",
"changes": [
{
"note": "Dependencies updated"
}
]
},
{
"version": "1.0.0",
"changes": [
{
"note": "Move all AssetProxy contracts out of contracts-protocol to new package",
"pr": 1539
}
]
}
]

362
contracts/asset-proxy/CHANGELOG.md
View File

@@ -1,362 +0,0 @@
<!--
changelogUtils.file is auto-generated using the monorepo-scripts package. Don't edit directly.
Edit the package's CHANGELOG.json file only.
-->
CHANGELOG
## v3.7.19 - _August 16, 2021_
* Dependencies updated
## v3.7.18 - _August 11, 2021_
* Dependencies updated
## v3.7.17 - _August 6, 2021_
* Dependencies updated
## v3.7.16 - _June 22, 2021_
* Dependencies updated
## v3.7.15 - _June 11, 2021_
* Dependencies updated
## v3.7.14 - _June 2, 2021_
* Dependencies updated
## v3.7.13 - _May 25, 2021_
* Dependencies updated
## v3.7.12 - _May 21, 2021_
* Dependencies updated
## v3.7.11 - _May 5, 2021_
* Dependencies updated
## v3.7.10 - _April 28, 2021_
* Dependencies updated
## v3.7.9 - _April 1, 2021_
* Dependencies updated
## v3.7.8 - _March 17, 2021_
* Dependencies updated
## v3.7.7 - _February 24, 2021_
* Dependencies updated
## v3.7.6 - _February 10, 2021_
* Dependencies updated
## v3.7.5 - _January 26, 2021_
* Dependencies updated
## v3.7.4 - _January 13, 2021_
* Dependencies updated
## v3.7.3 - _January 4, 2021_
* Dependencies updated
## v3.7.2 - _December 23, 2020_
* Dependencies updated
## v3.7.1 - _December 17, 2020_
* Dependencies updated
## v3.7.0 - _December 16, 2020_
* Fix Bancor support of ETH (#88)
## v3.6.9 - _December 9, 2020_
* Dependencies updated
## v3.6.8 - _December 7, 2020_
* Dependencies updated
## v3.6.7 - _December 3, 2020_
* Dependencies updated
## v3.6.6 - _November 19, 2020_
* Dependencies updated
## v3.6.5 - _November 13, 2020_
* Dependencies updated
## v3.6.4 - _November 3, 2020_
* Dependencies updated
## v3.6.3 - _November 3, 2020_
* Dependencies updated
## v3.6.2 - _November 2, 2020_
* Dependencies updated
## v3.6.1 - _October 28, 2020_
* Dependencies updated
## v3.6.0 - _October 27, 2020_
* Add `SwerveBridge` and `SnowSwapBridge` (duplicate of `CurveBridge`) (#2707)
## v3.5.0 - _October 21, 2020_
* Update `CurveBridge` to support more varied curves (#2633)
* Export DexForwarderBridgeContract (#2656)
* Add BancorBridge and IBancorNetwork, (#2650)
* Added `MStableBridge` (#2662)
* Added `MooniswapBridge` (#2675)
* Reworked `KyberBridge` (#2683)
* Added `CreamBridge` (#2715)
* Added `ShellBridge` (#2722)
* Added `DODOBridge` (#2701)
## v3.4.0 - _July 15, 2020_
* Fix instability with DFB. (#2616)
* Add `BalancerBridge` (#2613)
## v3.3.0 - _June 24, 2020_
* Use `LibERC20Token.approveIfBelow()` in DEX bridges for for approvals. (#2512)
* Emit `ERC20BridgeTransfer` events in bridges. (#2512)
* Change names of `ERC20BridgeTransfer` args to be less ambiguous. (#2524)
* Added `MixinGasToken` allowing Gas Tokens to be freed (#2523)
* Add `DexForwaderBridge` bridge contract. (#2525)
* Add `UniswapV2Bridge` bridge contract. (#2590)
* Add Gas Token freeing to `DexForwarderBridge` contract. (#2536)
## v3.2.5 - _March 3, 2020_
* Dependencies updated
## v3.2.4 - _February 27, 2020_
* Dependencies updated
## v3.2.3 - _February 26, 2020_
* Dependencies updated
## v3.2.2 - _February 25, 2020_
* Dependencies updated
## v3.2.1 - _February 15, 2020_
* Dependencies updated
## v3.2.0 - _February 8, 2020_
* Add more types and functions to `IDydx` (#2466)
* Rename `DydxBrigeAction.accountId` to `DydxBridgeAction.accountIdx` (#2466)
* Fix broken tests. (#2462)
* Remove dependency on `@0x/contracts-dev-utils` (#2462)
* Add asset data decoding functions (#2462)
* Add `setOperators()` to `IDydx` (#2462)
## v3.1.3 - _February 6, 2020_
* Dependencies updated
## v3.1.2 - _February 4, 2020_
* Dependencies updated
## v3.1.1 - _January 22, 2020_
* Dependencies updated
## v3.1.0 - _January 6, 2020_
* Integration tests for DydxBridge with ERC20BridgeProxy. (#2401)
* Fix `UniswapBridge` token -> token transfer call. (#2412)
* Fix `KyberBridge` incorrect `minConversionRate` calculation. (#2412)
## v3.0.2 - _December 17, 2019_
* Dependencies updated
## v3.0.1 - _December 9, 2019_
* Dependencies updated
## v3.0.0 - _December 2, 2019_
* Implement `KyberBridge`. (#2352)
* Drastically reduced bundle size by adding .npmignore, only exporting specific artifacts/wrappers/utils (#2330)
* ERC20Wrapper and ERC1155ProxyWrapper constructors now require an instance of DevUtilsContract (#2034)
* Disallow the zero address from being made an authorized address in MixinAuthorizable, and created an archive directory that includes an old version of Ownable (#2019)
* Remove `LibAssetProxyIds` contract (#2055)
* Compile and export all contracts, artifacts, and wrappers by default (#2055)
* Remove unused dependency on IAuthorizable in IAssetProxy (#1910)
* Add `ERC20BridgeProxy` (#2220)
* Add `Eth2DaiBridge` (#2221)
* Add `UniswapBridge` (#2233)
* Replaced `SafeMath` with `LibSafeMath` (#2254)
## v2.3.0-beta.4 - _December 2, 2019_
* Implement `KyberBridge`. (#2352)
* Implement `DydxBridge`. (#2365)
## v2.3.0-beta.3 - _November 20, 2019_
* Dependencies updated
## v2.3.0-beta.2 - _November 17, 2019_
* Drastically reduced bundle size by adding .npmignore, only exporting specific artifacts/wrappers/utils (#2330)
## v2.3.0-beta.1 - _November 7, 2019_
* ERC20Wrapper and ERC1155ProxyWrapper constructors now require an instance of DevUtilsContract (#2034)
## v2.3.0-beta.0 - _October 3, 2019_
* Disallow the zero address from being made an authorized address in MixinAuthorizable, and created an archive directory that includes an old version of Ownable (#2019)
* Remove `LibAssetProxyIds` contract (#2055)
* Compile and export all contracts, artifacts, and wrappers by default (#2055)
* Remove unused dependency on IAuthorizable in IAssetProxy (#1910)
* Add `ERC20BridgeProxy` (#2220)
* Add `Eth2DaiBridge` (#2221)
* Add `UniswapBridge` (#2233)
* Replaced `SafeMath` with `LibSafeMath` (#2254)
## v2.2.8 - _September 17, 2019_
* Dependencies updated
## v2.2.7 - _September 3, 2019_
* Dependencies updated
## v2.2.6 - _August 22, 2019_
* Dependencies updated
## v2.2.5 - _August 8, 2019_
* Dependencies updated
## v2.2.4 - _July 31, 2019_
* Updated calls to <contract wrapper>.deployFrom0xArtifactAsync to include artifact dependencies. (#1995)
## v2.2.3 - _July 24, 2019_
* Dependencies updated
## v2.2.2 - _July 15, 2019_
* Dependencies updated
## v2.2.1 - _July 13, 2019_
* Dependencies updated
## v2.2.0 - _July 13, 2019_
* Add `LibAssetProxyIds` contract (#1835)
* Updated ERC1155 Asset Proxy. Less optimization. More explicit handling of edge cases. (#1852)
* Implement StaticCallProxy (#1863)
## v2.1.5 - _May 24, 2019_
* Dependencies updated
## v2.1.4 - _May 15, 2019_
* Dependencies updated
## v2.1.3 - _May 14, 2019_
* Dependencies updated
## v2.1.2 - _May 10, 2019_
* Update tests to use contract-built-in `awaitTransactionSuccessAsync` (#1797)
* Make `ERC721Wrapper.setApprovalForAll()` take an owner address instead of a token ID (#1819)
* Automatically set unlimited proxy allowances in `ERC721.setBalancesAndAllowancesAsync()` (#1819)
* Add `setProxyAllowanceForAllAsync()` to `ERC1155ProxyWrapper`. (#1819)
## v2.1.1 - _April 11, 2019_
* Dependencies updated
## v2.1.0 - _March 21, 2019_
* Run Web3ProviderEngine without excess block polling (#1695)
## v2.0.0 - _March 20, 2019_
* Do not reexport external dependencies (#1682)
* Add ERC1155Proxy (#1661)
* Bumped solidity version to ^0.5.5 (#1701)
* Integration testing for ERC1155Proxy (#1673)
## v1.0.9 - _March 1, 2019_
* Dependencies updated
## v1.0.8 - _February 27, 2019_
* Dependencies updated
## v1.0.7 - _February 26, 2019_
* Dependencies updated
## v1.0.6 - _February 25, 2019_
* Dependencies updated
## v1.0.5 - _February 9, 2019_
* Dependencies updated
## v1.0.4 - _February 7, 2019_
* Dependencies updated
## v1.0.3 - _February 7, 2019_
* Fake publish to enable pinning
## v1.0.2 - _February 6, 2019_
* Dependencies updated
## v1.0.1 - _February 5, 2019_
* Dependencies updated
## v1.0.0 - _Invalid date_
* Move all AssetProxy contracts out of contracts-protocol to new package (#1539)

47
contracts/asset-proxy/DEPLOYS.json
View File

@@ -1,47 +0,0 @@
[
{
"name": "MultiAssetProxy",
"version": "1.0.0",
"changes": [
{
"note": "Add MultiAssetProxy implementation",
"pr": 1224,
"networks": {
"3": "0xab8fbd189c569ccdee3a4d929bb7f557be4028f6",
"4": "0xb34cde0ad3a83d04abebc0b66e75196f22216621",
"42": "0xf6313a772c222f51c28f2304c0703b8cf5428fd8"
}
}
]
},
{
"name": "ERC20Proxy",
"version": "1.0.0",
"changes": [
{
"note": "protocol v2 deploy",
"networks": {
"1": "0x2240dab907db71e64d3e0dba4800c83b5c502d4e",
"3": "0xb1408f4c245a23c31b98d2c626777d4c0d766caa",
"4": "0x3e809c563c15a295e832e37053798ddc8d6c8dab",
"42": "0xf1ec01d6236d3cd881a0bf0130ea25fe4234003e"
}
}
]
},
{
"name": "ERC721Proxy",
"version": "1.0.0",
"changes": [
{
"note": "protocol v2 deploy",
"networks": {
"1": "0x208e41fb445f1bb1b6780d58356e81405f3e6127",
"3": "0xe654aac058bfbf9f83fcaee7793311dd82f6ddb4",
"4": "0x8e1ff02637cb5e39f2fa36c14706aa348b065b09",
"42": "0x2a9127c745688a165106c11cd4d647d2220af821"
}
}
]
}
]

73
contracts/asset-proxy/README.md
View File

@@ -1,73 +0,0 @@
## AssetProxy
This package contains the implementations of all of the [`AssetProxy`](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/v2-specification.md#assetproxy) contracts available within the 0x protocol. These contracts are responsible for decoding the `assetData` sent to them and performing the actual transfer of assets. Addresses of the deployed contracts can be found in this 0x [guide](https://0x.org/docs/guides/0x-cheat-sheet) or the [DEPLOYS](./DEPLOYS.json) file within this package.
## Installation
**Install**
```bash
npm install @0x/contracts-asset-proxy --save
```
## Bug bounty
A bug bounty for the 2.0.0 contracts is ongoing! Instructions can be found [here](https://0x.org/docs/guides/bug-bounty-program).
## Contributing
We strongly recommend that the community help us make improvements and determine the future direction of the protocol. To report bugs within this package, please create an issue in this repository.
For proposals regarding the 0x protocol's smart contract architecture, message format, or additional functionality, go to the [0x Improvement Proposals (ZEIPs)](https://github.com/0xProject/ZEIPs) repository and follow the contribution guidelines provided therein.
Please read our [contribution guidelines](../../CONTRIBUTING.md) before getting started.
### Install Dependencies
If you don't have yarn workspaces enabled (Yarn < v1.0) - enable them:
```bash
yarn config set workspaces-experimental true
```
Then install dependencies
```bash
yarn install
```
### Build
To build this package and all other monorepo packages that it depends on, run the following from the monorepo root directory:
```bash
PKG=@0x/contracts-asset-proxy yarn build
```
Or continuously rebuild on change:
```bash
PKG=@0x/contracts-asset-proxy yarn watch
```
### Clean
```bash
yarn clean
```
### Lint
```bash
yarn lint
```
### Run Tests
```bash
yarn test
```
#### Testing options
Contracts testing options like coverage, profiling, revert traces or backing node choosing - are described [here](../TESTING.md).

27
contracts/asset-proxy/compiler.json
View File

@@ -1,27 +0,0 @@
{
"artifactsDir": "./test/generated-artifacts",
"contractsDir": "./contracts",
"useDockerisedSolc": false,
"isOfflineMode": false,
"shouldSaveStandardInput": true,
"compilerSettings": {
"evmVersion": "istanbul",
"optimizer": {
"enabled": true,
"runs": 1000000,
"details": { "yul": true, "deduplicate": true, "cse": true, "constantOptimizer": true }
},
"outputSelection": {
"*": {
"*": [
"abi",
"devdoc",
"evm.bytecode.object",
"evm.bytecode.sourceMap",
"evm.deployedBytecode.object",
"evm.deployedBytecode.sourceMap"
]
}
}
}
}

172
contracts/asset-proxy/contracts/archive/MixinAssetProxyDispatcher.sol
View File

@@ -1,172 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
import "../archive/Ownable.sol";
import "../src/interfaces/IAssetProxy.sol";
import "../src/interfaces/IAssetProxyDispatcher.sol";
contract MixinAssetProxyDispatcher is
Ownable,
IAssetProxyDispatcher
{
// Mapping from Asset Proxy Id's to their respective Asset Proxy
mapping (bytes4 => address) public assetProxies;
/// @dev Registers an asset proxy to its asset proxy id.
/// Once an asset proxy is registered, it cannot be unregistered.
/// @param assetProxy Address of new asset proxy to register.
function registerAssetProxy(address assetProxy)
external
onlyOwner
{
// Ensure that no asset proxy exists with current id.
bytes4 assetProxyId = IAssetProxy(assetProxy).getProxyId();
address currentAssetProxy = assetProxies[assetProxyId];
require(
currentAssetProxy == address(0),
"ASSET_PROXY_ALREADY_EXISTS"
);
// Add asset proxy and log registration.
assetProxies[assetProxyId] = assetProxy;
emit AssetProxyRegistered(
assetProxyId,
assetProxy
);
}
/// @dev Gets an asset proxy.
/// @param assetProxyId Id of the asset proxy.
/// @return The asset proxy registered to assetProxyId. Returns 0x0 if no proxy is registered.
function getAssetProxy(bytes4 assetProxyId)
external
view
returns (address)
{
return assetProxies[assetProxyId];
}
/// @dev Forwards arguments to assetProxy and calls `transferFrom`. Either succeeds or throws.
/// @param assetData Byte array encoded for the asset.
/// @param from Address to transfer token from.
/// @param to Address to transfer token to.
/// @param amount Amount of token to transfer.
function _dispatchTransferFrom(
bytes memory assetData,
address from,
address to,
uint256 amount
)
internal
{
// Do nothing if no amount should be transferred.
if (amount > 0 && from != to) {
// Ensure assetData length is valid
require(
assetData.length > 3,
"LENGTH_GREATER_THAN_3_REQUIRED"
);
// Lookup assetProxy. We do not use `LibBytes.readBytes4` for gas efficiency reasons.
bytes4 assetProxyId;
assembly {
assetProxyId := and(mload(
add(assetData, 32)),
0xFFFFFFFF00000000000000000000000000000000000000000000000000000000
)
}
address assetProxy = assetProxies[assetProxyId];
// Ensure that assetProxy exists
require(
assetProxy != address(0),
"ASSET_PROXY_DOES_NOT_EXIST"
);
// We construct calldata for the `assetProxy.transferFrom` ABI.
// The layout of this calldata is in the table below.
//
// | Area | Offset | Length | Contents |
// | -------- |--------|---------|-------------------------------------------- |
// | Header | 0 | 4 | function selector |
// | Params | | 4 * 32 | function parameters: |
// | | 4 | | 1. offset to assetData (*) |
// | | 36 | | 2. from |
// | | 68 | | 3. to |
// | | 100 | | 4. amount |
// | Data | | | assetData: |
// | | 132 | 32 | assetData Length |
// | | 164 | ** | assetData Contents |
assembly {
/////// Setup State ///////
// `cdStart` is the start of the calldata for `assetProxy.transferFrom` (equal to free memory ptr).
let cdStart := mload(64)
// `dataAreaLength` is the total number of words needed to store `assetData`
// As-per the ABI spec, this value is padded up to the nearest multiple of 32,
// and includes 32-bytes for length.
let dataAreaLength := and(add(mload(assetData), 63), 0xFFFFFFFFFFFE0)
// `cdEnd` is the end of the calldata for `assetProxy.transferFrom`.
let cdEnd := add(cdStart, add(132, dataAreaLength))
/////// Setup Header Area ///////
// This area holds the 4-byte `transferFromSelector`.
// bytes4(keccak256("transferFrom(bytes,address,address,uint256)")) = 0xa85e59e4
mstore(cdStart, 0xa85e59e400000000000000000000000000000000000000000000000000000000)
/////// Setup Params Area ///////
// Each parameter is padded to 32-bytes. The entire Params Area is 128 bytes.
// Notes:
// 1. The offset to `assetData` is the length of the Params Area (128 bytes).
// 2. A 20-byte mask is applied to addresses to zero-out the unused bytes.
mstore(add(cdStart, 4), 128)
mstore(add(cdStart, 36), and(from, 0xffffffffffffffffffffffffffffffffffffffff))
mstore(add(cdStart, 68), and(to, 0xffffffffffffffffffffffffffffffffffffffff))
mstore(add(cdStart, 100), amount)
/////// Setup Data Area ///////
// This area holds `assetData`.
let dataArea := add(cdStart, 132)
// solhint-disable-next-line no-empty-blocks
for {} lt(dataArea, cdEnd) {} {
mstore(dataArea, mload(assetData))
dataArea := add(dataArea, 32)
assetData := add(assetData, 32)
}
/////// Call `assetProxy.transferFrom` using the constructed calldata ///////
let success := call(
gas, // forward all gas
assetProxy, // call address of asset proxy
0, // don't send any ETH
cdStart, // pointer to start of input
sub(cdEnd, cdStart), // length of input
cdStart, // write output over input
512 // reserve 512 bytes for output
)
if iszero(success) {
revert(cdStart, returndatasize())
}
}
}
}
}

117
contracts/asset-proxy/contracts/archive/MixinAuthorizable.sol
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@@ -1,117 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
import "../archive/Ownable.sol";
import "../src/interfaces/IAuthorizable.sol";
contract MixinAuthorizable is
Ownable,
IAuthorizable
{
/// @dev Only authorized addresses can invoke functions with this modifier.
modifier onlyAuthorized {
require(
authorized[msg.sender],
"SENDER_NOT_AUTHORIZED"
);
_;
}
mapping (address => bool) public authorized;
address[] public authorities;
/// @dev Authorizes an address.
/// @param target Address to authorize.
function addAuthorizedAddress(address target)
external
onlyOwner
{
require(
!authorized[target],
"TARGET_ALREADY_AUTHORIZED"
);
authorized[target] = true;
authorities.push(target);
emit AuthorizedAddressAdded(target, msg.sender);
}
/// @dev Removes authorizion of an address.
/// @param target Address to remove authorization from.
function removeAuthorizedAddress(address target)
external
onlyOwner
{
require(
authorized[target],
"TARGET_NOT_AUTHORIZED"
);
delete authorized[target];
for (uint256 i = 0; i < authorities.length; i++) {
if (authorities[i] == target) {
authorities[i] = authorities[authorities.length - 1];
authorities.length -= 1;
break;
}
}
emit AuthorizedAddressRemoved(target, msg.sender);
}
/// @dev Removes authorizion of an address.
/// @param target Address to remove authorization from.
/// @param index Index of target in authorities array.
function removeAuthorizedAddressAtIndex(
address target,
uint256 index
)
external
onlyOwner
{
require(
authorized[target],
"TARGET_NOT_AUTHORIZED"
);
require(
index < authorities.length,
"INDEX_OUT_OF_BOUNDS"
);
require(
authorities[index] == target,
"AUTHORIZED_ADDRESS_MISMATCH"
);
delete authorized[target];
authorities[index] = authorities[authorities.length - 1];
authorities.length -= 1;
emit AuthorizedAddressRemoved(target, msg.sender);
}
/// @dev Gets all authorized addresses.
/// @return Array of authorized addresses.
function getAuthorizedAddresses()
external
view
returns (address[] memory)
{
return authorities;
}
}

33
contracts/asset-proxy/contracts/archive/Ownable.sol
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@@ -1,33 +0,0 @@
pragma solidity ^0.5.9;
import "@0x/contracts-utils/contracts/src/interfaces/IOwnable.sol";
contract Ownable is
IOwnable
{
address public owner;
constructor ()
public
{
owner = msg.sender;
}
modifier onlyOwner() {
require(
msg.sender == owner,
"ONLY_CONTRACT_OWNER"
);
_;
}
function transferOwnership(address newOwner)
public
onlyOwner
{
if (newOwner != address(0)) {
owner = newOwner;
}
}
}

97
contracts/asset-proxy/contracts/src/ERC1155Proxy.sol
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@@ -1,97 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
import "@0x/contracts-utils/contracts/src/LibBytes.sol";
import "@0x/contracts-utils/contracts/src/LibSafeMath.sol";
import "@0x/contracts-erc1155/contracts/src/interfaces/IERC1155.sol";
import "../archive/MixinAuthorizable.sol";
import "./interfaces/IAssetProxy.sol";
contract ERC1155Proxy is
MixinAuthorizable,
IAssetProxy
{
using LibBytes for bytes;
using LibSafeMath for uint256;
// Id of this proxy.
bytes4 constant internal PROXY_ID = bytes4(keccak256("ERC1155Assets(address,uint256[],uint256[],bytes)"));
/// @dev Transfers batch of ERC1155 assets. Either succeeds or throws.
/// @param assetData Byte array encoded with ERC1155 token address, array of ids, array of values, and callback data.
/// @param from Address to transfer assets from.
/// @param to Address to transfer assets to.
/// @param amount Amount that will be multiplied with each element of `assetData.values` to scale the
/// values that will be transferred.
function transferFrom(
bytes calldata assetData,
address from,
address to,
uint256 amount
)
external
onlyAuthorized
{
// Decode params from `assetData`
// solhint-disable indent
(
address erc1155TokenAddress,
uint256[] memory ids,
uint256[] memory values,
bytes memory data
) = abi.decode(
assetData.sliceDestructive(4, assetData.length),
(address, uint256[], uint256[], bytes)
);
// solhint-enable indent
// Scale values up by `amount`
uint256 length = values.length;
uint256[] memory scaledValues = new uint256[](length);
for (uint256 i = 0; i != length; i++) {
// We write the scaled values to an unused location in memory in order
// to avoid copying over `ids` or `data`. This is possible if they are
// identical to `values` and the offsets for each are pointing to the
// same location in the ABI encoded calldata.
scaledValues[i] = values[i].safeMul(amount);
}
// Execute `safeBatchTransferFrom` call
// Either succeeds or throws
IERC1155(erc1155TokenAddress).safeBatchTransferFrom(
from,
to,
ids,
scaledValues,
data
);
}
/// @dev Gets the proxy id associated with the proxy address.
/// @return Proxy id.
function getProxyId()
external
pure
returns (bytes4)
{
return PROXY_ID;
}
}

126
contracts/asset-proxy/contracts/src/ERC20BridgeProxy.sol
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@@ -1,126 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
pragma experimental ABIEncoderV2;
import "@0x/contracts-utils/contracts/src/LibBytes.sol";
import "@0x/contracts-utils/contracts/src/LibSafeMath.sol";
import "@0x/contracts-utils/contracts/src/Authorizable.sol";
import "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol";
import "./interfaces/IAssetProxy.sol";
import "./interfaces/IERC20Bridge.sol";
contract ERC20BridgeProxy is
IAssetProxy,
Authorizable
{
using LibBytes for bytes;
using LibSafeMath for uint256;
// @dev Id of this proxy. Also the result of a successful bridge call.
// bytes4(keccak256("ERC20Bridge(address,address,bytes)"))
bytes4 constant private PROXY_ID = 0xdc1600f3;
/// @dev Calls a bridge contract to transfer `amount` of ERC20 from `from`
/// to `to`. Asserts that the balance of `to` has increased by `amount`.
/// @param assetData Abi-encoded data for this asset proxy encoded as:
/// abi.encodeWithSelector(
/// bytes4 PROXY_ID,
/// address tokenAddress,
/// address bridgeAddress,
/// bytes bridgeData
/// )
/// @param from Address to transfer asset from.
/// @param to Address to transfer asset to.
/// @param amount Amount of asset to transfer.
function transferFrom(
bytes calldata assetData,
address from,
address to,
uint256 amount
)
external
onlyAuthorized
{
// Extract asset data fields.
(
address tokenAddress,
address bridgeAddress,
bytes memory bridgeData
) = abi.decode(
assetData.sliceDestructive(4, assetData.length),
(address, address, bytes)
);
// Remember the balance of `to` before calling the bridge.
uint256 balanceBefore = balanceOf(tokenAddress, to);
// Call the bridge, who should transfer `amount` of `tokenAddress` to
// `to`.
bytes4 success = IERC20Bridge(bridgeAddress).bridgeTransferFrom(
tokenAddress,
from,
to,
amount,
bridgeData
);
// Bridge must return the proxy ID to indicate success.
require(success == PROXY_ID, "BRIDGE_FAILED");
// Ensure that the balance of `to` has increased by at least `amount`.
require(
balanceBefore.safeAdd(amount) <= balanceOf(tokenAddress, to),
"BRIDGE_UNDERPAY"
);
}
/// @dev Gets the proxy id associated with this asset proxy.
/// @return proxyId The proxy id.
function getProxyId()
external
pure
returns (bytes4 proxyId)
{
return PROXY_ID;
}
/// @dev Retrieves the balance of `owner` for this asset.
/// @return balance The balance of the ERC20 token being transferred by this
/// asset proxy.
function balanceOf(bytes calldata assetData, address owner)
external
view
returns (uint256 balance)
{
(address tokenAddress) = abi.decode(
assetData.sliceDestructive(4, assetData.length),
(address)
);
return balanceOf(tokenAddress, owner);
}
/// @dev Retrieves the balance of `owner` given an ERC20 address.
/// @return balance The balance of the ERC20 token for `owner`.
function balanceOf(address tokenAddress, address owner)
private
view
returns (uint256 balance)
{
return IERC20Token(tokenAddress).balanceOf(owner);
}
}

184
contracts/asset-proxy/contracts/src/ERC20Proxy.sol
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@@ -1,184 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
import "../archive/MixinAuthorizable.sol";
contract ERC20Proxy is
MixinAuthorizable
{
// Id of this proxy.
bytes4 constant internal PROXY_ID = bytes4(keccak256("ERC20Token(address)"));
// solhint-disable-next-line payable-fallback
function ()
external
{
assembly {
// The first 4 bytes of calldata holds the function selector
let selector := and(calldataload(0), 0xffffffff00000000000000000000000000000000000000000000000000000000)
// `transferFrom` will be called with the following parameters:
// assetData Encoded byte array.
// from Address to transfer asset from.
// to Address to transfer asset to.
// amount Amount of asset to transfer.
// bytes4(keccak256("transferFrom(bytes,address,address,uint256)")) = 0xa85e59e4
if eq(selector, 0xa85e59e400000000000000000000000000000000000000000000000000000000) {
// To lookup a value in a mapping, we load from the storage location keccak256(k, p),
// where k is the key left padded to 32 bytes and p is the storage slot
let start := mload(64)
mstore(start, and(caller, 0xffffffffffffffffffffffffffffffffffffffff))
mstore(add(start, 32), authorized_slot)
// Revert if authorized[msg.sender] == false
if iszero(sload(keccak256(start, 64))) {
// Revert with `Error("SENDER_NOT_AUTHORIZED")`
mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
mstore(64, 0x0000001553454e4445525f4e4f545f415554484f52495a454400000000000000)
mstore(96, 0)
revert(0, 100)
}
// `transferFrom`.
// The function is marked `external`, so no abi decodeding is done for
// us. Instead, we expect the `calldata` memory to contain the
// following:
//
// | Area | Offset | Length | Contents |
// |----------|--------|---------|-------------------------------------|
// | Header | 0 | 4 | function selector |
// | Params | | 4 * 32 | function parameters: |
// | | 4 | | 1. offset to assetData (*) |
// | | 36 | | 2. from |
// | | 68 | | 3. to |
// | | 100 | | 4. amount |
// | Data | | | assetData: |
// | | 132 | 32 | assetData Length |
// | | 164 | ** | assetData Contents |
//
// (*): offset is computed from start of function parameters, so offset
// by an additional 4 bytes in the calldata.
//
// (**): see table below to compute length of assetData Contents
//
// WARNING: The ABIv2 specification allows additional padding between
// the Params and Data section. This will result in a larger
// offset to assetData.
// Asset data itself is encoded as follows:
//
// | Area | Offset | Length | Contents |
// |----------|--------|---------|-------------------------------------|
// | Header | 0 | 4 | function selector |
// | Params | | 1 * 32 | function parameters: |
// | | 4 | 12 + 20 | 1. token address |
// We construct calldata for the `token.transferFrom` ABI.
// The layout of this calldata is in the table below.
//
// | Area | Offset | Length | Contents |
// |----------|--------|---------|-------------------------------------|
// | Header | 0 | 4 | function selector |
// | Params | | 3 * 32 | function parameters: |
// | | 4 | | 1. from |
// | | 36 | | 2. to |
// | | 68 | | 3. amount |
/////// Read token address from calldata ///////
// * The token address is stored in `assetData`.
//
// * The "offset to assetData" is stored at offset 4 in the calldata (table 1).
// [assetDataOffsetFromParams = calldataload(4)]
//
// * Notes that the "offset to assetData" is relative to the "Params" area of calldata;
// add 4 bytes to account for the length of the "Header" area (table 1).
// [assetDataOffsetFromHeader = assetDataOffsetFromParams + 4]
//
// * The "token address" is offset 32+4=36 bytes into "assetData" (tables 1 & 2).
// [tokenOffset = assetDataOffsetFromHeader + 36 = calldataload(4) + 4 + 36]
let token := calldataload(add(calldataload(4), 40))
/////// Setup Header Area ///////
// This area holds the 4-byte `transferFrom` selector.
// Any trailing data in transferFromSelector will be
// overwritten in the next `mstore` call.
mstore(0, 0x23b872dd00000000000000000000000000000000000000000000000000000000)
/////// Setup Params Area ///////
// We copy the fields `from`, `to` and `amount` in bulk
// from our own calldata to the new calldata.
calldatacopy(4, 36, 96)
/////// Call `token.transferFrom` using the calldata ///////
let success := call(
gas, // forward all gas
token, // call address of token contract
0, // don't send any ETH
0, // pointer to start of input
100, // length of input
0, // write output over input
32 // output size should be 32 bytes
)
/////// Check return data. ///////
// If there is no return data, we assume the token incorrectly
// does not return a bool. In this case we expect it to revert
// on failure, which was handled above.
// If the token does return data, we require that it is a single
// nonzero 32 bytes value.
// So the transfer succeeded if the call succeeded and either
// returned nothing, or returned a non-zero 32 byte value.
success := and(success, or(
iszero(returndatasize),
and(
eq(returndatasize, 32),
gt(mload(0), 0)
)
))
if success {
return(0, 0)
}
// Revert with `Error("TRANSFER_FAILED")`
mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
mstore(64, 0x0000000f5452414e534645525f4641494c454400000000000000000000000000)
mstore(96, 0)
revert(0, 100)
}
// Revert if undefined function is called
revert(0, 0)
}
}
/// @dev Gets the proxy id associated with the proxy address.
/// @return Proxy id.
function getProxyId()
external
pure
returns (bytes4)
{
return PROXY_ID;
}
}

171
contracts/asset-proxy/contracts/src/ERC721Proxy.sol
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@@ -1,171 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
import "../archive/MixinAuthorizable.sol";
contract ERC721Proxy is
MixinAuthorizable
{
// Id of this proxy.
bytes4 constant internal PROXY_ID = bytes4(keccak256("ERC721Token(address,uint256)"));
// solhint-disable-next-line payable-fallback
function ()
external
{
assembly {
// The first 4 bytes of calldata holds the function selector
let selector := and(calldataload(0), 0xffffffff00000000000000000000000000000000000000000000000000000000)
// `transferFrom` will be called with the following parameters:
// assetData Encoded byte array.
// from Address to transfer asset from.
// to Address to transfer asset to.
// amount Amount of asset to transfer.
// bytes4(keccak256("transferFrom(bytes,address,address,uint256)")) = 0xa85e59e4
if eq(selector, 0xa85e59e400000000000000000000000000000000000000000000000000000000) {
// To lookup a value in a mapping, we load from the storage location keccak256(k, p),
// where k is the key left padded to 32 bytes and p is the storage slot
let start := mload(64)
mstore(start, and(caller, 0xffffffffffffffffffffffffffffffffffffffff))
mstore(add(start, 32), authorized_slot)
// Revert if authorized[msg.sender] == false
if iszero(sload(keccak256(start, 64))) {
// Revert with `Error("SENDER_NOT_AUTHORIZED")`
mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
mstore(64, 0x0000001553454e4445525f4e4f545f415554484f52495a454400000000000000)
mstore(96, 0)
revert(0, 100)
}
// `transferFrom`.
// The function is marked `external`, so no abi decodeding is done for
// us. Instead, we expect the `calldata` memory to contain the
// following:
//
// | Area | Offset | Length | Contents |
// |----------|--------|---------|-------------------------------------|
// | Header | 0 | 4 | function selector |
// | Params | | 4 * 32 | function parameters: |
// | | 4 | | 1. offset to assetData (*) |
// | | 36 | | 2. from |
// | | 68 | | 3. to |
// | | 100 | | 4. amount |
// | Data | | | assetData: |
// | | 132 | 32 | assetData Length |
// | | 164 | ** | assetData Contents |
//
// (*): offset is computed from start of function parameters, so offset
// by an additional 4 bytes in the calldata.
//
// (**): see table below to compute length of assetData Contents
//
// WARNING: The ABIv2 specification allows additional padding between
// the Params and Data section. This will result in a larger
// offset to assetData.
// Asset data itself is encoded as follows:
//
// | Area | Offset | Length | Contents |
// |----------|--------|---------|-------------------------------------|
// | Header | 0 | 4 | function selector |
// | Params | | 2 * 32 | function parameters: |
// | | 4 | 12 + 20 | 1. token address |
// | | 36 | | 2. tokenId |
// We construct calldata for the `token.transferFrom` ABI.
// The layout of this calldata is in the table below.
//
// | Area | Offset | Length | Contents |
// |----------|--------|---------|-------------------------------------|
// | Header | 0 | 4 | function selector |
// | Params | | 3 * 32 | function parameters: |
// | | 4 | | 1. from |
// | | 36 | | 2. to |
// | | 68 | | 3. tokenId |
// There exists only 1 of each token.
// require(amount == 1, "INVALID_AMOUNT")
if sub(calldataload(100), 1) {
// Revert with `Error("INVALID_AMOUNT")`
mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
mstore(64, 0x0000000e494e56414c49445f414d4f554e540000000000000000000000000000)
mstore(96, 0)
revert(0, 100)
}
/////// Setup Header Area ///////
// This area holds the 4-byte `transferFrom` selector.
// Any trailing data in transferFromSelector will be
// overwritten in the next `mstore` call.
mstore(0, 0x23b872dd00000000000000000000000000000000000000000000000000000000)
/////// Setup Params Area ///////
// We copy the fields `from` and `to` in bulk
// from our own calldata to the new calldata.
calldatacopy(4, 36, 64)
// Copy `tokenId` field from our own calldata to the new calldata.
let assetDataOffset := calldataload(4)
calldatacopy(68, add(assetDataOffset, 72), 32)
/////// Call `token.transferFrom` using the calldata ///////
let token := calldataload(add(assetDataOffset, 40))
let success := call(
gas, // forward all gas
token, // call address of token contract
0, // don't send any ETH
0, // pointer to start of input
100, // length of input
0, // write output to null
0 // output size is 0 bytes
)
if success {
return(0, 0)
}
// Revert with `Error("TRANSFER_FAILED")`
mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
mstore(64, 0x0000000f5452414e534645525f4641494c454400000000000000000000000000)
mstore(96, 0)
revert(0, 100)
}
// Revert if undefined function is called
revert(0, 0)
}
}
/// @dev Gets the proxy id associated with the proxy address.
/// @return Proxy id.
function getProxyId()
external
pure
returns (bytes4)
{
return PROXY_ID;
}
}

335
contracts/asset-proxy/contracts/src/MultiAssetProxy.sol
View File

@@ -1,335 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
import "../archive/MixinAssetProxyDispatcher.sol";
import "../archive/MixinAuthorizable.sol";
contract MultiAssetProxy is
MixinAssetProxyDispatcher,
MixinAuthorizable
{
// Id of this proxy.
bytes4 constant internal PROXY_ID = bytes4(keccak256("MultiAsset(uint256[],bytes[])"));
// solhint-disable-next-line payable-fallback
function ()
external
{
// NOTE: The below assembly assumes that clients do some input validation and that the input is properly encoded according to the AbiV2 specification.
// It is technically possible for inputs with very large lengths and offsets to cause overflows. However, this would make the calldata prohibitively
// expensive and we therefore do not check for overflows in these scenarios.
assembly {
// The first 4 bytes of calldata holds the function selector
let selector := and(calldataload(0), 0xffffffff00000000000000000000000000000000000000000000000000000000)
// `transferFrom` will be called with the following parameters:
// assetData Encoded byte array.
// from Address to transfer asset from.
// to Address to transfer asset to.
// amount Amount of asset to transfer.
// bytes4(keccak256("transferFrom(bytes,address,address,uint256)")) = 0xa85e59e4
if eq(selector, 0xa85e59e400000000000000000000000000000000000000000000000000000000) {
// To lookup a value in a mapping, we load from the storage location keccak256(k, p),
// where k is the key left padded to 32 bytes and p is the storage slot
mstore(0, caller)
mstore(32, authorized_slot)
// Revert if authorized[msg.sender] == false
if iszero(sload(keccak256(0, 64))) {
// Revert with `Error("SENDER_NOT_AUTHORIZED")`
mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
mstore(64, 0x0000001553454e4445525f4e4f545f415554484f52495a454400000000000000)
mstore(96, 0)
revert(0, 100)
}
// `transferFrom`.
// The function is marked `external`, so no abi decoding is done for
// us. Instead, we expect the `calldata` memory to contain the
// following:
//
// | Area | Offset | Length | Contents |
// |----------|--------|---------|-------------------------------------|
// | Header | 0 | 4 | function selector |
// | Params | | 4 * 32 | function parameters: |
// | | 4 | | 1. offset to assetData (*) |
// | | 36 | | 2. from |
// | | 68 | | 3. to |
// | | 100 | | 4. amount |
// | Data | | | assetData: |
// | | 132 | 32 | assetData Length |
// | | 164 | ** | assetData Contents |
//
// (*): offset is computed from start of function parameters, so offset
// by an additional 4 bytes in the calldata.
//
// (**): see table below to compute length of assetData Contents
//
// WARNING: The ABIv2 specification allows additional padding between
// the Params and Data section. This will result in a larger
// offset to assetData.
// Load offset to `assetData`
let assetDataOffset := add(calldataload(4), 4)
// Load length in bytes of `assetData`
let assetDataLength := calldataload(assetDataOffset)
// Asset data itself is encoded as follows:
//
// | Area | Offset | Length | Contents |
// |----------|-------------|---------|-------------------------------------|
// | Header | 0 | 4 | assetProxyId |
// | Params | | 2 * 32 | function parameters: |
// | | 4 | | 1. offset to amounts (*) |
// | | 36 | | 2. offset to nestedAssetData (*) |
// | Data | | | amounts: |
// | | 68 | 32 | amounts Length |
// | | 100 | a | amounts Contents |
// | | | | nestedAssetData: |
// | | 100 + a | 32 | nestedAssetData Length |
// | | 132 + a | b | nestedAssetData Contents (offsets) |
// | | 132 + a + b | | nestedAssetData[0, ..., len] |
// Assert that the length of asset data:
// 1. Must be at least 68 bytes (see table above)
// 2. Must be a multiple of 32 (excluding the 4-byte selector)
if or(lt(assetDataLength, 68), mod(sub(assetDataLength, 4), 32)) {
// Revert with `Error("INVALID_ASSET_DATA_LENGTH")`
mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
mstore(64, 0x00000019494e56414c49445f41535345545f444154415f4c454e475448000000)
mstore(96, 0)
revert(0, 100)
}
// End of asset data in calldata
// assetDataOffset
// + 32 (assetData len)
let assetDataEnd := add(assetDataOffset, add(assetDataLength, 32))
if gt(assetDataEnd, calldatasize()) {
// Revert with `Error("INVALID_ASSET_DATA_END")`
mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
mstore(64, 0x00000016494e56414c49445f41535345545f444154415f454e44000000000000)
mstore(96, 0)
revert(0, 100)
}
// In order to find the offset to `amounts`, we must add:
// assetDataOffset
// + 32 (assetData len)
// + 4 (assetProxyId)
let amountsOffset := calldataload(add(assetDataOffset, 36))
// In order to find the offset to `nestedAssetData`, we must add:
// assetDataOffset
// + 32 (assetData len)
// + 4 (assetProxyId)
// + 32 (amounts offset)
let nestedAssetDataOffset := calldataload(add(assetDataOffset, 68))
// In order to find the start of the `amounts` contents, we must add:
// assetDataOffset
// + 32 (assetData len)
// + 4 (assetProxyId)
// + amountsOffset
// + 32 (amounts len)
let amountsContentsStart := add(assetDataOffset, add(amountsOffset, 68))
// Load number of elements in `amounts`
let amountsLen := calldataload(sub(amountsContentsStart, 32))
// In order to find the start of the `nestedAssetData` contents, we must add:
// assetDataOffset
// + 32 (assetData len)
// + 4 (assetProxyId)
// + nestedAssetDataOffset
// + 32 (nestedAssetData len)
let nestedAssetDataContentsStart := add(assetDataOffset, add(nestedAssetDataOffset, 68))
// Load number of elements in `nestedAssetData`
let nestedAssetDataLen := calldataload(sub(nestedAssetDataContentsStart, 32))
// Revert if number of elements in `amounts` differs from number of elements in `nestedAssetData`
if sub(amountsLen, nestedAssetDataLen) {
// Revert with `Error("LENGTH_MISMATCH")`
mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
mstore(64, 0x0000000f4c454e4754485f4d49534d4154434800000000000000000000000000)
mstore(96, 0)
revert(0, 100)
}
// Copy `transferFrom` selector, offset to `assetData`, `from`, and `to` from calldata to memory
calldatacopy(
0, // memory can safely be overwritten from beginning
0, // start of calldata
100 // length of selector (4) and 3 params (32 * 3)
)
// Overwrite existing offset to `assetData` with our own
mstore(4, 128)
// Load `amount`
let amount := calldataload(100)
// Calculate number of bytes in `amounts` contents
let amountsByteLen := mul(amountsLen, 32)
// Initialize `assetProxyId` and `assetProxy` to 0
let assetProxyId := 0
let assetProxy := 0
// Loop through `amounts` and `nestedAssetData`, calling `transferFrom` for each respective element
for {let i := 0} lt(i, amountsByteLen) {i := add(i, 32)} {
// Calculate the total amount
let amountsElement := calldataload(add(amountsContentsStart, i))
let totalAmount := mul(amountsElement, amount)
// Revert if `amount` != 0 and multiplication resulted in an overflow
if iszero(or(
iszero(amount),
eq(div(totalAmount, amount), amountsElement)
)) {
// Revert with `Error("UINT256_OVERFLOW")`
mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
mstore(64, 0x0000001055494e543235365f4f564552464c4f57000000000000000000000000)
mstore(96, 0)
revert(0, 100)
}
// Write `totalAmount` to memory
mstore(100, totalAmount)
// Load offset to `nestedAssetData[i]`
let nestedAssetDataElementOffset := calldataload(add(nestedAssetDataContentsStart, i))
// In order to find the start of the `nestedAssetData[i]` contents, we must add:
// assetDataOffset
// + 32 (assetData len)
// + 4 (assetProxyId)
// + nestedAssetDataOffset
// + 32 (nestedAssetData len)
// + nestedAssetDataElementOffset
// + 32 (nestedAssetDataElement len)
let nestedAssetDataElementContentsStart := add(
assetDataOffset,
add(
nestedAssetDataOffset,
add(nestedAssetDataElementOffset, 100)
)
)
// Load length of `nestedAssetData[i]`
let nestedAssetDataElementLenStart := sub(nestedAssetDataElementContentsStart, 32)
let nestedAssetDataElementLen := calldataload(nestedAssetDataElementLenStart)
// Revert if the `nestedAssetData` does not contain a 4 byte `assetProxyId`
if lt(nestedAssetDataElementLen, 4) {
// Revert with `Error("LENGTH_GREATER_THAN_3_REQUIRED")`
mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
mstore(64, 0x0000001e4c454e4754485f475245415445525f5448414e5f335f524551554952)
mstore(96, 0x4544000000000000000000000000000000000000000000000000000000000000)
revert(0, 100)
}
// Load AssetProxy id
let currentAssetProxyId := and(
calldataload(nestedAssetDataElementContentsStart),
0xffffffff00000000000000000000000000000000000000000000000000000000
)
// Only load `assetProxy` if `currentAssetProxyId` does not equal `assetProxyId`
// We do not need to check if `currentAssetProxyId` is 0 since `assetProxy` is also initialized to 0
if sub(currentAssetProxyId, assetProxyId) {
// Update `assetProxyId`
assetProxyId := currentAssetProxyId
// To lookup a value in a mapping, we load from the storage location keccak256(k, p),
// where k is the key left padded to 32 bytes and p is the storage slot
mstore(132, assetProxyId)
mstore(164, assetProxies_slot)
assetProxy := sload(keccak256(132, 64))
}
// Revert if AssetProxy with given id does not exist
if iszero(assetProxy) {
// Revert with `Error("ASSET_PROXY_DOES_NOT_EXIST")`
mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
mstore(64, 0x0000001a41535345545f50524f58595f444f45535f4e4f545f45584953540000)
mstore(96, 0)
revert(0, 100)
}
// Copy `nestedAssetData[i]` from calldata to memory
calldatacopy(
132, // memory slot after `amounts[i]`
nestedAssetDataElementLenStart, // location of `nestedAssetData[i]` in calldata
add(nestedAssetDataElementLen, 32) // `nestedAssetData[i].length` plus 32 byte length
)
// call `assetProxy.transferFrom`
let success := call(
gas, // forward all gas
assetProxy, // call address of asset proxy
0, // don't send any ETH
0, // pointer to start of input
add(164, nestedAssetDataElementLen), // length of input
0, // write output over memory that won't be reused
0 // don't copy output to memory
)
// Revert with reason given by AssetProxy if `transferFrom` call failed
if iszero(success) {
returndatacopy(
0, // copy to memory at 0
0, // copy from return data at 0
returndatasize() // copy all return data
)
revert(0, returndatasize())
}
}
// Return if no `transferFrom` calls reverted
return(0, 0)
}
// Revert if undefined function is called
revert(0, 0)
}
}
/// @dev Gets the proxy id associated with the proxy address.
/// @return Proxy id.
function getProxyId()
external
pure
returns (bytes4)
{
return PROXY_ID;
}
}

83
contracts/asset-proxy/contracts/src/StaticCallProxy.sol
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@@ -1,83 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
import "@0x/contracts-utils/contracts/src/LibBytes.sol";
// solhint-disable no-unused-vars
contract StaticCallProxy {
using LibBytes for bytes;
// Id of this proxy.
bytes4 constant internal PROXY_ID = bytes4(keccak256("StaticCall(address,bytes,bytes32)"));
/// @dev Makes a staticcall to a target address and verifies that the data returned matches the expected return data.
/// @param assetData Byte array encoded with staticCallTarget, staticCallData, and expectedCallResultHash
/// @param from This value is ignored.
/// @param to This value is ignored.
/// @param amount This value is ignored.
function transferFrom(
bytes calldata assetData,
address from,
address to,
uint256 amount
)
external
view
{
// Decode params from `assetData`
(
address staticCallTarget,
bytes memory staticCallData,
bytes32 expectedReturnDataHash
) = abi.decode(
assetData.sliceDestructive(4, assetData.length),
(address, bytes, bytes32)
);
// Execute staticcall
(bool success, bytes memory returnData) = staticCallTarget.staticcall(staticCallData);
// Revert with returned data if staticcall is unsuccessful
if (!success) {
assembly {
revert(add(returnData, 32), mload(returnData))
}
}
// Revert if hash of return data is not as expected
bytes32 returnDataHash = keccak256(returnData);
require(
expectedReturnDataHash == returnDataHash,
"UNEXPECTED_STATIC_CALL_RESULT"
);
}
/// @dev Gets the proxy id associated with the proxy address.
/// @return Proxy id.
function getProxyId()
external
pure
returns (bytes4)
{
return PROXY_ID;
}
}

103
contracts/asset-proxy/contracts/src/bridges/BalancerBridge.sol
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@@ -1,103 +0,0 @@
/*
Copyright 2020 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
pragma experimental ABIEncoderV2;
import "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol";
import "@0x/contracts-erc20/contracts/src/LibERC20Token.sol";
import "@0x/contracts-exchange-libs/contracts/src/IWallet.sol";
import "@0x/contracts-utils/contracts/src/DeploymentConstants.sol";
import "../interfaces/IERC20Bridge.sol";
import "../interfaces/IBalancerPool.sol";
contract BalancerBridge is
IERC20Bridge,
IWallet,
DeploymentConstants
{
/// @dev Callback for `IERC20Bridge`. Tries to buy `amount` of
/// `toTokenAddress` tokens by selling the entirety of the `fromTokenAddress`
/// token encoded in the bridge data, then transfers the bought
/// tokens to `to`.
/// @param toTokenAddress The token to buy and transfer to `to`.
/// @param from The maker (this contract).
/// @param to The recipient of the bought tokens.
/// @param amount Minimum amount of `toTokenAddress` tokens to buy.
/// @param bridgeData The abi-encoded addresses of the "from" token and Balancer pool.
/// @return success The magic bytes if successful.
function bridgeTransferFrom(
address toTokenAddress,
address from,
address to,
uint256 amount,
bytes calldata bridgeData
)
external
returns (bytes4 success)
{
// Decode the bridge data.
(address fromTokenAddress, address poolAddress) = abi.decode(
bridgeData,
(address, address)
);
require(toTokenAddress != fromTokenAddress, "BalancerBridge/INVALID_PAIR");
uint256 fromTokenBalance = IERC20Token(fromTokenAddress).balanceOf(address(this));
// Grant an allowance to the exchange to spend `fromTokenAddress` token.
LibERC20Token.approveIfBelow(fromTokenAddress, poolAddress, fromTokenBalance);
// Sell all of this contract's `fromTokenAddress` token balance.
(uint256 boughtAmount,) = IBalancerPool(poolAddress).swapExactAmountIn(
fromTokenAddress, // tokenIn
fromTokenBalance, // tokenAmountIn
toTokenAddress, // tokenOut
amount, // minAmountOut
uint256(-1) // maxPrice
);
// Transfer the converted `toToken`s to `to`.
LibERC20Token.transfer(toTokenAddress, to, boughtAmount);
emit ERC20BridgeTransfer(
fromTokenAddress,
toTokenAddress,
fromTokenBalance,
boughtAmount,
from,
to
);
return BRIDGE_SUCCESS;
}
/// @dev `SignatureType.Wallet` callback, so that this bridge can be the maker
/// and sign for itself in orders. Always succeeds.
/// @return magicValue Magic success bytes, always.
function isValidSignature(
bytes32,
bytes calldata
)
external
view
returns (bytes4 magicValue)
{
return LEGACY_WALLET_MAGIC_VALUE;
}
}

144
contracts/asset-proxy/contracts/src/bridges/BancorBridge.sol
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@@ -1,144 +0,0 @@
/*
Copyright 2020 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
pragma experimental ABIEncoderV2;
import "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol";
import "@0x/contracts-erc20/contracts/src/interfaces/IEtherToken.sol";
import "@0x/contracts-erc20/contracts/src/LibERC20Token.sol";
import "@0x/contracts-exchange-libs/contracts/src/IWallet.sol";
import "@0x/contracts-utils/contracts/src/DeploymentConstants.sol";
import "../interfaces/IERC20Bridge.sol";
import "../interfaces/IBancorNetwork.sol";
contract BancorBridge is
IERC20Bridge,
IWallet,
DeploymentConstants
{
struct TransferState {
address bancorNetworkAddress;
address[] path;
IEtherToken weth;
}
/// @dev Bancor ETH pseudo-address.
address constant public BANCOR_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
// solhint-disable no-empty-blocks
/// @dev Payable fallback to receive ETH from Bancor/WETH.
function ()
external
payable
{
// Poor man's receive in 0.5.9
require(msg.data.length == 0);
}
/// @dev Callback for `IERC20Bridge`. Tries to buy `amount` of
/// `toTokenAddress` tokens by selling the entirety of the `fromTokenAddress`
/// token encoded in the bridge data, then transfers the bought
/// tokens to `to`.
/// @param toTokenAddress The token to buy and transfer to `to`.
/// @param from The maker (this contract).
/// @param to The recipient of the bought tokens.
/// @param amount Minimum amount of `toTokenAddress` tokens to buy.
/// @param bridgeData The abi-encoded conversion path addresses and Bancor network address
/// @return success The magic bytes if successful.
function bridgeTransferFrom(
address toTokenAddress,
address from,
address to,
uint256 amount,
bytes calldata bridgeData
)
external
returns (bytes4 success)
{
// hold variables to get around stack depth limitations
TransferState memory state;
// Decode the bridge data.
(
state.path,
state.bancorNetworkAddress
// solhint-disable indent
) = abi.decode(bridgeData, (address[], address));
// solhint-enable indent
state.weth = IEtherToken(_getWethAddress());
require(state.path.length >= 2, "BancorBridge/PATH_LENGTH_MUST_BE_GREATER_THAN_TWO");
// Grant an allowance to the Bancor Network to spend `fromTokenAddress` token.
uint256 fromTokenBalance;
uint256 payableAmount = 0;
// If it's ETH in the path then withdraw from WETH
// The Bancor path will have ETH as the 0xeee address
// Bancor expects to be paid in ETH not WETH
if (state.path[0] == BANCOR_ETH_ADDRESS) {
fromTokenBalance = state.weth.balanceOf(address(this));
state.weth.withdraw(fromTokenBalance);
payableAmount = fromTokenBalance;
} else {
fromTokenBalance = IERC20Token(state.path[0]).balanceOf(address(this));
LibERC20Token.approveIfBelow(state.path[0], state.bancorNetworkAddress, fromTokenBalance);
}
// Convert the tokens
uint256 boughtAmount = IBancorNetwork(state.bancorNetworkAddress).convertByPath.value(payableAmount)(
state.path, // path originating with source token and terminating in destination token
fromTokenBalance, // amount of source token to trade
amount, // minimum amount of destination token expected to receive
state.path[state.path.length-1] == BANCOR_ETH_ADDRESS ? address(this) : to, // beneficiary
address(0), // affiliateAccount; no fee paid
0 // affiliateFee; no fee paid
);
if (state.path[state.path.length-1] == BANCOR_ETH_ADDRESS) {
state.weth.deposit.value(boughtAmount)();
state.weth.transfer(to, boughtAmount);
}
emit ERC20BridgeTransfer(
state.path[0] == BANCOR_ETH_ADDRESS ? address(state.weth) : state.path[0],
toTokenAddress,
fromTokenBalance,
boughtAmount,
from,
to
);
return BRIDGE_SUCCESS;
}
/// @dev `SignatureType.Wallet` callback, so that this bridge can be the maker
/// and sign for itself in orders. Always succeeds.
/// @return magicValue Magic success bytes, always.
function isValidSignature(
bytes32,
bytes calldata
)
external
view
returns (bytes4 magicValue)
{
return LEGACY_WALLET_MAGIC_VALUE;
}
}

75
contracts/asset-proxy/contracts/src/bridges/ChaiBridge.sol
View File

@@ -1,75 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
pragma experimental ABIEncoderV2;
import "../interfaces/IERC20Bridge.sol";
import "../interfaces/IChai.sol";
import "@0x/contracts-utils/contracts/src/DeploymentConstants.sol";
import "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol";
// solhint-disable space-after-comma
contract ChaiBridge is
IERC20Bridge,
DeploymentConstants
{
/// @dev Withdraws `amount` of `from` address's Dai from the Chai contract.
/// Transfers `amount` of Dai to `to` address.
/// @param from Address to transfer asset from.
/// @param to Address to transfer asset to.
/// @param amount Amount of asset to transfer.
/// @return success The magic bytes `0xdc1600f3` if successful.
function bridgeTransferFrom(
address /* tokenAddress */,
address from,
address to,
uint256 amount,
bytes calldata /* bridgeData */
)
external
returns (bytes4 success)
{
// Ensure that only the `ERC20BridgeProxy` can call this function.
require(
msg.sender == _getERC20BridgeProxyAddress(),
"ChaiBridge/ONLY_CALLABLE_BY_ERC20_BRIDGE_PROXY"
);
// Withdraw `from` address's Dai.
// NOTE: This contract must be approved to spend Chai on behalf of `from`.
bytes memory drawCalldata = abi.encodeWithSelector(
IChai(address(0)).draw.selector,
from,
amount
);
(bool success,) = _getChaiAddress().call(drawCalldata);
require(
success,
"ChaiBridge/DRAW_DAI_FAILED"
);
// Transfer Dai to `to`
// This will never fail if the `draw` call was successful
IERC20Token(_getDaiAddress()).transfer(to, amount);
return BRIDGE_SUCCESS;
}
}

103
contracts/asset-proxy/contracts/src/bridges/CreamBridge.sol
View File

@@ -1,103 +0,0 @@
/*
Copyright 2020 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
pragma experimental ABIEncoderV2;
import "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol";
import "@0x/contracts-erc20/contracts/src/LibERC20Token.sol";
import "@0x/contracts-exchange-libs/contracts/src/IWallet.sol";
import "@0x/contracts-utils/contracts/src/DeploymentConstants.sol";
import "../interfaces/IERC20Bridge.sol";
import "../interfaces/IBalancerPool.sol";
contract CreamBridge is
IERC20Bridge,
IWallet,
DeploymentConstants
{
/// @dev Callback for `IERC20Bridge`. Tries to buy `amount` of
/// `toTokenAddress` tokens by selling the entirety of the `fromTokenAddress`
/// token encoded in the bridge data, then transfers the bought
/// tokens to `to`.
/// @param toTokenAddress The token to buy and transfer to `to`.
/// @param from The maker (this contract).
/// @param to The recipient of the bought tokens.
/// @param amount Minimum amount of `toTokenAddress` tokens to buy.
/// @param bridgeData The abi-encoded addresses of the "from" token and Balancer pool.
/// @return success The magic bytes if successful.
function bridgeTransferFrom(
address toTokenAddress,
address from,
address to,
uint256 amount,
bytes calldata bridgeData
)
external
returns (bytes4 success)
{
// Decode the bridge data.
(address fromTokenAddress, address poolAddress) = abi.decode(
bridgeData,
(address, address)
);
require(toTokenAddress != fromTokenAddress, "CreamBridge/INVALID_PAIR");
uint256 fromTokenBalance = IERC20Token(fromTokenAddress).balanceOf(address(this));
// Grant an allowance to the exchange to spend `fromTokenAddress` token.
LibERC20Token.approveIfBelow(fromTokenAddress, poolAddress, fromTokenBalance);
// Sell all of this contract's `fromTokenAddress` token balance.
(uint256 boughtAmount,) = IBalancerPool(poolAddress).swapExactAmountIn(
fromTokenAddress, // tokenIn
fromTokenBalance, // tokenAmountIn
toTokenAddress, // tokenOut
amount, // minAmountOut
uint256(-1) // maxPrice
);
// Transfer the converted `toToken`s to `to`.
LibERC20Token.transfer(toTokenAddress, to, boughtAmount);
emit ERC20BridgeTransfer(
fromTokenAddress,
toTokenAddress,
fromTokenBalance,
boughtAmount,
from,
to
);
return BRIDGE_SUCCESS;
}
/// @dev `SignatureType.Wallet` callback, so that this bridge can be the maker
/// and sign for itself in orders. Always succeeds.
/// @return magicValue Magic success bytes, always.
function isValidSignature(
bytes32,
bytes calldata
)
external
view
returns (bytes4 magicValue)
{
return LEGACY_WALLET_MAGIC_VALUE;
}
}

136
contracts/asset-proxy/contracts/src/bridges/CryptoComBridge.sol
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@@ -1,136 +0,0 @@
/*
Copyright 2020 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
pragma experimental ABIEncoderV2;
import "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol";
import "@0x/contracts-erc20/contracts/src/interfaces/IEtherToken.sol";
import "@0x/contracts-erc20/contracts/src/LibERC20Token.sol";
import "@0x/contracts-exchange-libs/contracts/src/IWallet.sol";
import "@0x/contracts-utils/contracts/src/LibAddressArray.sol";
import "@0x/contracts-utils/contracts/src/DeploymentConstants.sol";
import "../interfaces/IUniswapV2Router01.sol";
import "../interfaces/IERC20Bridge.sol";
// solhint-disable space-after-comma
// solhint-disable not-rely-on-time
contract CryptoComBridge is
IERC20Bridge,
IWallet,
DeploymentConstants
{
struct TransferState {
address[] path;
address router;
uint256 fromTokenBalance;
}
/// @dev Callback for `IERC20Bridge`. Tries to buy `amount` of
/// `toTokenAddress` tokens by selling the entirety of the `fromTokenAddress`
/// token encoded in the bridge data.
/// @param toTokenAddress The token to buy and transfer to `to`.
/// @param from The maker (this contract).
/// @param to The recipient of the bought tokens.
/// @param amount Minimum amount of `toTokenAddress` tokens to buy.
/// @param bridgeData The abi-encoded path of token addresses. Last element must be toTokenAddress
/// @return success The magic bytes if successful.
function bridgeTransferFrom(
address toTokenAddress,
address from,
address to,
uint256 amount,
bytes calldata bridgeData
)
external
returns (bytes4 success)
{
// hold variables to get around stack depth limitations
TransferState memory state;
// Decode the bridge data to get the `fromTokenAddress`.
// solhint-disable indent
(state.path, state.router) = abi.decode(bridgeData, (address[], address));
// solhint-enable indent
require(state.path.length >= 2, "CryptoComBridge/PATH_LENGTH_MUST_BE_AT_LEAST_TWO");
require(state.path[state.path.length - 1] == toTokenAddress, "CryptoComBridge/LAST_ELEMENT_OF_PATH_MUST_MATCH_OUTPUT_TOKEN");
// Just transfer the tokens if they're the same.
if (state.path[0] == toTokenAddress) {
LibERC20Token.transfer(state.path[0], to, amount);
return BRIDGE_SUCCESS;
}
// Get our balance of `fromTokenAddress` token.
state.fromTokenBalance = IERC20Token(state.path[0]).balanceOf(address(this));
// Grant the SushiSwap router an allowance.
LibERC20Token.approveIfBelow(
state.path[0],
state.router,
state.fromTokenBalance
);
// Buy as much `toTokenAddress` token with `fromTokenAddress` token
// and transfer it to `to`.
IUniswapV2Router01 router = IUniswapV2Router01(state.router);
uint[] memory amounts = router.swapExactTokensForTokens(
// Sell all tokens we hold.
state.fromTokenBalance,
// Minimum buy amount.
amount,
// Convert `fromTokenAddress` to `toTokenAddress`.
state.path,
// Recipient is `to`.
to,
// Expires after this block.
block.timestamp
);
emit ERC20BridgeTransfer(
// input token
state.path[0],
// output token
toTokenAddress,
// input token amount
state.fromTokenBalance,
// output token amount
amounts[amounts.length - 1],
from,
to
);
return BRIDGE_SUCCESS;
}
/// @dev `SignatureType.Wallet` callback, so that this bridge can be the maker
/// and sign for itself in orders. Always succeeds.
/// @return magicValue Success bytes, always.
function isValidSignature(
bytes32,
bytes calldata
)
external
view
returns (bytes4 magicValue)
{
return LEGACY_WALLET_MAGIC_VALUE;
}
}

119
contracts/asset-proxy/contracts/src/bridges/CurveBridge.sol
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@@ -1,119 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
pragma experimental ABIEncoderV2;
import "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol";
import "@0x/contracts-erc20/contracts/src/LibERC20Token.sol";
import "@0x/contracts-exchange-libs/contracts/src/IWallet.sol";
import "@0x/contracts-utils/contracts/src/DeploymentConstants.sol";
import "../interfaces/IERC20Bridge.sol";
import "../interfaces/ICurve.sol";
// solhint-disable not-rely-on-time
// solhint-disable space-after-comma
contract CurveBridge is
IERC20Bridge,
IWallet,
DeploymentConstants
{
struct CurveBridgeData {
address curveAddress;
bytes4 exchangeFunctionSelector;
address fromTokenAddress;
int128 fromCoinIdx;
int128 toCoinIdx;
}
/// @dev Callback for `ICurve`. Tries to buy `amount` of
/// `toTokenAddress` tokens by selling the entirety of the opposing asset
/// (DAI, USDC) to the Curve contract, then transfers the bought
/// tokens to `to`.
/// @param toTokenAddress The token to give to `to` (i.e DAI, USDC, USDT).
/// @param from The maker (this contract).
/// @param to The recipient of the bought tokens.
/// @param amount Minimum amount of `toTokenAddress` tokens to buy.
/// @param bridgeData The abi-encoeded "from" token address.
/// @return success The magic bytes if successful.
function bridgeTransferFrom(
address toTokenAddress,
address from,
address to,
uint256 amount,
bytes calldata bridgeData
)
external
returns (bytes4 success)
{
// Decode the bridge data to get the Curve metadata.
CurveBridgeData memory data = abi.decode(bridgeData, (CurveBridgeData));
require(toTokenAddress != data.fromTokenAddress, "CurveBridge/INVALID_PAIR");
uint256 fromTokenBalance = IERC20Token(data.fromTokenAddress).balanceOf(address(this));
// Grant an allowance to the exchange to spend `fromTokenAddress` token.
LibERC20Token.approveIfBelow(data.fromTokenAddress, data.curveAddress, fromTokenBalance);
// Try to sell all of this contract's `fromTokenAddress` token balance.
{
(bool didSucceed, bytes memory resultData) =
data.curveAddress.call(abi.encodeWithSelector(
data.exchangeFunctionSelector,
data.fromCoinIdx,
data.toCoinIdx,
// dx
fromTokenBalance,
// min dy
amount
));
if (!didSucceed) {
assembly { revert(add(resultData, 32), mload(resultData)) }
}
}
uint256 toTokenBalance = IERC20Token(toTokenAddress).balanceOf(address(this));
// Transfer the converted `toToken`s to `to`.
LibERC20Token.transfer(toTokenAddress, to, toTokenBalance);
emit ERC20BridgeTransfer(
data.fromTokenAddress,
toTokenAddress,
fromTokenBalance,
toTokenBalance,
from,
to
);
return BRIDGE_SUCCESS;
}
/// @dev `SignatureType.Wallet` callback, so that this bridge can be the maker
/// and sign for itself in orders. Always succeeds.
/// @return magicValue Magic success bytes, always.
function isValidSignature(
bytes32,
bytes calldata
)
external
view
returns (bytes4 magicValue)
{
return LEGACY_WALLET_MAGIC_VALUE;
}
}

147
contracts/asset-proxy/contracts/src/bridges/DODOBridge.sol
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@@ -1,147 +0,0 @@
/*
Copyright 2020 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
pragma experimental ABIEncoderV2;
import "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol";
import "@0x/contracts-erc20/contracts/src/LibERC20Token.sol";
import "@0x/contracts-exchange-libs/contracts/src/IWallet.sol";
import "@0x/contracts-utils/contracts/src/DeploymentConstants.sol";
import "../interfaces/IERC20Bridge.sol";
interface IDODOHelper {
function querySellQuoteToken(address dodo, uint256 amount) external view returns (uint256);
}
interface IDODO {
function sellBaseToken(uint256 amount, uint256 minReceiveQuote, bytes calldata data) external returns (uint256);
function buyBaseToken(uint256 amount, uint256 maxPayQuote, bytes calldata data) external returns (uint256);
}
contract DODOBridge is
IERC20Bridge,
IWallet,
DeploymentConstants
{
struct TransferState {
address fromTokenAddress;
uint256 fromTokenBalance;
address pool;
bool isSellBase;
}
/// @dev Callback for `IERC20Bridge`. Tries to buy `amount` of
/// `toTokenAddress` tokens by selling the entirety of the `fromTokenAddress`
/// token encoded in the bridge data.
/// @param toTokenAddress The token to buy and transfer to `to`.
/// @param from The maker (this contract).
/// @param to The recipient of the bought tokens.
/// @param amount Minimum amount of `toTokenAddress` tokens to buy.
/// @param bridgeData The abi-encoded path of token addresses. Last element must be toTokenAddress
/// @return success The magic bytes if successful.
function bridgeTransferFrom(
address toTokenAddress,
address from,
address to,
uint256 amount,
bytes calldata bridgeData
)
external
returns (bytes4 success)
{
TransferState memory state;
// Decode the bridge data to get the `fromTokenAddress`.
(state.fromTokenAddress, state.pool, state.isSellBase) = abi.decode(bridgeData, (address, address, bool));
require(state.pool != address(0), "DODOBridge/InvalidPool");
IDODO exchange = IDODO(state.pool);
// Get our balance of `fromTokenAddress` token.
state.fromTokenBalance = IERC20Token(state.fromTokenAddress).balanceOf(address(this));
// Grant the pool an allowance.
LibERC20Token.approveIfBelow(
state.fromTokenAddress,
address(exchange),
state.fromTokenBalance
);
uint256 boughtAmount;
if (state.isSellBase) {
boughtAmount = exchange.sellBaseToken(
// amount to sell
state.fromTokenBalance,
// min receive amount
1,
new bytes(0)
);
} else {
// Need to re-calculate the sell quote amount into buyBase
boughtAmount = IDODOHelper(_getDODOHelperAddress()).querySellQuoteToken(
address(exchange),
state.fromTokenBalance
);
exchange.buyBaseToken(
// amount to buy
boughtAmount,
// max pay amount
state.fromTokenBalance,
new bytes(0)
);
}
// Transfer funds to `to`
IERC20Token(toTokenAddress).transfer(to, boughtAmount);
emit ERC20BridgeTransfer(
// input token
state.fromTokenAddress,
// output token
toTokenAddress,
// input token amount
state.fromTokenBalance,
// output token amount
boughtAmount,
from,
to
);
return BRIDGE_SUCCESS;
}
/// @dev `SignatureType.Wallet` callback, so that this bridge can be the maker
/// and sign for itself in orders. Always succeeds.
/// @return magicValue Success bytes, always.
function isValidSignature(
bytes32,
bytes calldata
)
external
view
returns (bytes4 magicValue)
{
return LEGACY_WALLET_MAGIC_VALUE;
}
}

200
contracts/asset-proxy/contracts/src/bridges/DexForwarderBridge.sol
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@@ -1,200 +0,0 @@
/*
Copyright 2020 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
pragma experimental ABIEncoderV2;
import "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol";
import "@0x/contracts-erc20/contracts/src/LibERC20Token.sol";
import "@0x/contracts-exchange-libs/contracts/src/IWallet.sol";
import "@0x/contracts-exchange-libs/contracts/src/LibMath.sol";
import "@0x/contracts-utils/contracts/src/DeploymentConstants.sol";
import "@0x/contracts-utils/contracts/src/LibBytes.sol";
import "@0x/contracts-utils/contracts/src/LibSafeMath.sol";
import "../interfaces/IERC20Bridge.sol";
import "./MixinGasToken.sol";
// solhint-disable space-after-comma, indent
contract DexForwarderBridge is
IERC20Bridge,
IWallet,
DeploymentConstants,
MixinGasToken
{
using LibSafeMath for uint256;
/// @dev Data needed to reconstruct a bridge call.
struct BridgeCall {
address target;
uint256 inputTokenAmount;
uint256 outputTokenAmount;
bytes bridgeData;
}
/// @dev Intermediate state variables used by `bridgeTransferFrom()`, in
/// struct form to get around stack limits.
struct TransferFromState {
address inputToken;
uint256 initialInputTokenBalance;
uint256 callInputTokenAmount;
uint256 callOutputTokenAmount;
uint256 totalInputTokenSold;
BridgeCall[] calls;
}
/// @dev Spends this contract's entire balance of input tokens by forwarding
/// them to other bridges. Reverts if the entire balance is not spent.
/// @param outputToken The token being bought.
/// @param to The recipient of the bought tokens.
/// @param bridgeData The abi-encoded input token address.
/// @return success The magic bytes if successful.
function bridgeTransferFrom(
address outputToken,
address /* from */,
address to,
uint256 /* amount */,
bytes calldata bridgeData
)
external
freesGasTokensFromCollector
returns (bytes4 success)
{
require(
msg.sender == _getERC20BridgeProxyAddress(),
"DexForwarderBridge/SENDER_NOT_AUTHORIZED"
);
TransferFromState memory state;
(
state.inputToken,
state.calls
) = abi.decode(bridgeData, (address, BridgeCall[]));
state.initialInputTokenBalance =
IERC20Token(state.inputToken).balanceOf(address(this));
for (uint256 i = 0; i < state.calls.length; ++i) {
// Stop if the we've sold all our input tokens.
if (state.totalInputTokenSold >= state.initialInputTokenBalance) {
break;
}
// Compute token amounts.
state.callInputTokenAmount = LibSafeMath.min256(
state.calls[i].inputTokenAmount,
state.initialInputTokenBalance.safeSub(state.totalInputTokenSold)
);
state.callOutputTokenAmount = LibMath.getPartialAmountFloor(
state.callInputTokenAmount,
state.calls[i].inputTokenAmount,
state.calls[i].outputTokenAmount
);
// Execute the call in a new context so we can recoup transferred
// funds by reverting.
(bool didSucceed, ) = address(this)
.call(abi.encodeWithSelector(
this.executeBridgeCall.selector,
state.calls[i].target,
to,
state.inputToken,
outputToken,
state.callInputTokenAmount,
state.callOutputTokenAmount,
state.calls[i].bridgeData
));
if (didSucceed) {
// Increase the amount of tokens sold.
state.totalInputTokenSold = state.totalInputTokenSold.safeAdd(
state.callInputTokenAmount
);
}
}
// Always succeed.
return BRIDGE_SUCCESS;
}
/// @dev Transfers `inputToken` token to a bridge contract then calls
/// its `bridgeTransferFrom()`. This is executed in separate context
/// so we can revert the transfer on error. This can only be called
// by this contract itself.
/// @param bridge The bridge contract.
/// @param to The recipient of `outputToken` tokens.
/// @param inputToken The input token.
/// @param outputToken The output token.
/// @param inputTokenAmount The amount of input tokens to transfer to `bridge`.
/// @param outputTokenAmount The amount of expected output tokens to be sent
/// to `to` by `bridge`.
function executeBridgeCall(
address bridge,
address to,
address inputToken,
address outputToken,
uint256 inputTokenAmount,
uint256 outputTokenAmount,
bytes calldata bridgeData
)
external
{
// Must be called through `bridgeTransferFrom()`.
require(msg.sender == address(this), "DexForwarderBridge/ONLY_SELF");
// `bridge` must not be this contract.
require(bridge != address(this));
// Get the starting balance of output tokens for `to`.
uint256 initialRecipientBalance = IERC20Token(outputToken).balanceOf(to);
// Transfer input tokens to the bridge.
LibERC20Token.transfer(inputToken, bridge, inputTokenAmount);
// Call the bridge.
(bool didSucceed, bytes memory resultData) =
bridge.call(abi.encodeWithSelector(
IERC20Bridge(0).bridgeTransferFrom.selector,
outputToken,
bridge,
to,
outputTokenAmount,
bridgeData
));
// Revert if the call failed or not enough tokens were bought.
// This will also undo the token transfer.
require(
didSucceed
&& resultData.length == 32
&& LibBytes.readBytes32(resultData, 0) == bytes32(BRIDGE_SUCCESS)
&& IERC20Token(outputToken).balanceOf(to).safeSub(initialRecipientBalance) >= outputTokenAmount
);
}
/// @dev `SignatureType.Wallet` callback, so that this bridge can be the maker
/// and sign for itself in orders. Always succeeds.
/// @return magicValue Magic success bytes, always.
function isValidSignature(
bytes32,
bytes calldata
)
external
view
returns (bytes4 magicValue)
{
return LEGACY_WALLET_MAGIC_VALUE;
}
}

242
contracts/asset-proxy/contracts/src/bridges/DydxBridge.sol
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@@ -1,242 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
pragma experimental ABIEncoderV2;
import "@0x/contracts-utils/contracts/src/DeploymentConstants.sol";
import "@0x/contracts-utils/contracts/src/LibSafeMath.sol";
import "@0x/contracts-exchange-libs/contracts/src/LibMath.sol";
import "../interfaces/IERC20Bridge.sol";
import "../interfaces/IDydxBridge.sol";
import "../interfaces/IDydx.sol";
contract DydxBridge is
IERC20Bridge,
IDydxBridge,
DeploymentConstants
{
using LibSafeMath for uint256;
/// @dev Callback for `IERC20Bridge`. Deposits or withdraws tokens from a dydx account.
/// Notes:
/// 1. This bridge must be set as an operator of the input dydx account.
/// 2. This function may only be called in the context of the 0x Exchange.
/// 3. The maker or taker of the 0x order must be the dydx account owner.
/// 4. Deposits into dydx are made from the `from` address.
/// 5. Withdrawals from dydx are made to the `to` address.
/// 6. Calling this function must always withdraw at least `amount`,
/// otherwise the `ERC20Bridge` will revert.
/// @param from The sender of the tokens and owner of the dydx account.
/// @param to The recipient of the tokens.
/// @param amount Minimum amount of `toTokenAddress` tokens to deposit or withdraw.
/// @param encodedBridgeData An abi-encoded `BridgeData` struct.
/// @return success The magic bytes if successful.
function bridgeTransferFrom(
address, /* toTokenAddress */
address from,
address to,
uint256 amount,
bytes calldata encodedBridgeData
)
external
returns (bytes4 success)
{
// Ensure that only the `ERC20BridgeProxy` can call this function.
require(
msg.sender == _getERC20BridgeProxyAddress(),
"DydxBridge/ONLY_CALLABLE_BY_ERC20_BRIDGE_PROXY"
);
// Decode bridge data.
(BridgeData memory bridgeData) = abi.decode(encodedBridgeData, (BridgeData));
// The dydx accounts are owned by the `from` address.
IDydx.AccountInfo[] memory accounts = _createAccounts(from, bridgeData);
// Create dydx actions to run on the dydx accounts.
IDydx.ActionArgs[] memory actions = _createActions(
from,
to,
amount,
bridgeData
);
// Run operation. This will revert on failure.
IDydx(_getDydxAddress()).operate(accounts, actions);
return BRIDGE_SUCCESS;
}
/// @dev Creates an array of accounts for dydx to operate on.
/// All accounts must belong to the same owner.
/// @param accountOwner Owner of the dydx account.
/// @param bridgeData A `BridgeData` struct.
function _createAccounts(
address accountOwner,
BridgeData memory bridgeData
)
internal
returns (IDydx.AccountInfo[] memory accounts)
{
uint256[] memory accountNumbers = bridgeData.accountNumbers;
uint256 nAccounts = accountNumbers.length;
accounts = new IDydx.AccountInfo[](nAccounts);
for (uint256 i = 0; i < nAccounts; ++i) {
accounts[i] = IDydx.AccountInfo({
owner: accountOwner,
number: accountNumbers[i]
});
}
}
/// @dev Creates an array of actions to carry out on dydx.
/// @param depositFrom Deposit value from this address (owner of the dydx account).
/// @param withdrawTo Withdraw value to this address.
/// @param amount The amount of value available to operate on.
/// @param bridgeData A `BridgeData` struct.
function _createActions(
address depositFrom,
address withdrawTo,
uint256 amount,
BridgeData memory bridgeData
)
internal
returns (IDydx.ActionArgs[] memory actions)
{
BridgeAction[] memory bridgeActions = bridgeData.actions;
uint256 nBridgeActions = bridgeActions.length;
actions = new IDydx.ActionArgs[](nBridgeActions);
for (uint256 i = 0; i < nBridgeActions; ++i) {
// Cache current bridge action.
BridgeAction memory bridgeAction = bridgeActions[i];
// Scale amount, if conversion rate is set.
uint256 scaledAmount;
if (bridgeAction.conversionRateDenominator > 0) {
scaledAmount = LibMath.safeGetPartialAmountFloor(
bridgeAction.conversionRateNumerator,
bridgeAction.conversionRateDenominator,
amount
);
} else {
scaledAmount = amount;
}
// Construct dydx action.
if (bridgeAction.actionType == BridgeActionType.Deposit) {
// Deposit tokens from the account owner into their dydx account.
actions[i] = _createDepositAction(
depositFrom,
scaledAmount,
bridgeAction
);
} else if (bridgeAction.actionType == BridgeActionType.Withdraw) {
// Withdraw tokens from dydx to the `otherAccount`.
actions[i] = _createWithdrawAction(
withdrawTo,
scaledAmount,
bridgeAction
);
} else {
// If all values in the `Action` enum are handled then this
// revert is unreachable: Solidity will revert when casting
// from `uint8` to `Action`.
revert("DydxBridge/UNRECOGNIZED_BRIDGE_ACTION");
}
}
}
/// @dev Returns a dydx `DepositAction`.
/// @param depositFrom Deposit tokens from this address who is also the account owner.
/// @param amount of tokens to deposit.
/// @param bridgeAction A `BridgeAction` struct.
/// @return depositAction The encoded dydx action.
function _createDepositAction(
address depositFrom,
uint256 amount,
BridgeAction memory bridgeAction
)
internal
pure
returns (
IDydx.ActionArgs memory depositAction
)
{
// Create dydx amount.
IDydx.AssetAmount memory dydxAmount = IDydx.AssetAmount({
sign: true, // true if positive.
denomination: IDydx.AssetDenomination.Wei, // Wei => actual token amount held in account.
ref: IDydx.AssetReference.Delta, // Delta => a relative amount.
value: amount // amount to deposit.
});
// Create dydx deposit action.
depositAction = IDydx.ActionArgs({
actionType: IDydx.ActionType.Deposit, // deposit tokens.
amount: dydxAmount, // amount to deposit.
accountIdx: bridgeAction.accountIdx, // index in the `accounts` when calling `operate`.
primaryMarketId: bridgeAction.marketId, // indicates which token to deposit.
otherAddress: depositFrom, // deposit from the account owner.
// unused parameters
secondaryMarketId: 0,
otherAccountIdx: 0,
data: hex''
});
}
/// @dev Returns a dydx `WithdrawAction`.
/// @param withdrawTo Withdraw tokens to this address.
/// @param amount of tokens to withdraw.
/// @param bridgeAction A `BridgeAction` struct.
/// @return withdrawAction The encoded dydx action.
function _createWithdrawAction(
address withdrawTo,
uint256 amount,
BridgeAction memory bridgeAction
)
internal
pure
returns (
IDydx.ActionArgs memory withdrawAction
)
{
// Create dydx amount.
IDydx.AssetAmount memory amountToWithdraw = IDydx.AssetAmount({
sign: false, // false if negative.
denomination: IDydx.AssetDenomination.Wei, // Wei => actual token amount held in account.
ref: IDydx.AssetReference.Delta, // Delta => a relative amount.
value: amount // amount to withdraw.
});
// Create withdraw action.
withdrawAction = IDydx.ActionArgs({
actionType: IDydx.ActionType.Withdraw, // withdraw tokens.
amount: amountToWithdraw, // amount to withdraw.
accountIdx: bridgeAction.accountIdx, // index in the `accounts` when calling `operate`.
primaryMarketId: bridgeAction.marketId, // indicates which token to withdraw.
otherAddress: withdrawTo, // withdraw tokens to this address.
// unused parameters
secondaryMarketId: 0,
otherAccountIdx: 0,
data: hex''
});
}
}

98
contracts/asset-proxy/contracts/src/bridges/Eth2DaiBridge.sol
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@@ -1,98 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
pragma experimental ABIEncoderV2;
import "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol";
import "@0x/contracts-erc20/contracts/src/LibERC20Token.sol";
import "@0x/contracts-exchange-libs/contracts/src/IWallet.sol";
import "@0x/contracts-utils/contracts/src/DeploymentConstants.sol";
import "../interfaces/IERC20Bridge.sol";
import "../interfaces/IEth2Dai.sol";
// solhint-disable space-after-comma
contract Eth2DaiBridge is
IERC20Bridge,
IWallet,
DeploymentConstants
{
/// @dev Callback for `IERC20Bridge`. Tries to buy `amount` of
/// `toTokenAddress` tokens by selling the entirety of the opposing asset
/// (DAI or WETH) to the Eth2Dai contract, then transfers the bought
/// tokens to `to`.
/// @param toTokenAddress The token to give to `to` (either DAI or WETH).
/// @param from The maker (this contract).
/// @param to The recipient of the bought tokens.
/// @param amount Minimum amount of `toTokenAddress` tokens to buy.
/// @param bridgeData The abi-encoeded "from" token address.
/// @return success The magic bytes if successful.
function bridgeTransferFrom(
address toTokenAddress,
address from,
address to,
uint256 amount,
bytes calldata bridgeData
)
external
returns (bytes4 success)
{
// Decode the bridge data to get the `fromTokenAddress`.
(address fromTokenAddress) = abi.decode(bridgeData, (address));
IEth2Dai exchange = IEth2Dai(_getEth2DaiAddress());
uint256 fromTokenBalance = IERC20Token(fromTokenAddress).balanceOf(address(this));
// Grant an allowance to the exchange to spend `fromTokenAddress` token.
LibERC20Token.approveIfBelow(fromTokenAddress, address(exchange), fromTokenBalance);
// Try to sell all of this contract's `fromTokenAddress` token balance.
uint256 boughtAmount = exchange.sellAllAmount(
fromTokenAddress,
fromTokenBalance,
toTokenAddress,
amount
);
// Transfer the converted `toToken`s to `to`.
LibERC20Token.transfer(toTokenAddress, to, boughtAmount);
emit ERC20BridgeTransfer(
fromTokenAddress,
toTokenAddress,
fromTokenBalance,
boughtAmount,
from,
to
);
return BRIDGE_SUCCESS;
}
/// @dev `SignatureType.Wallet` callback, so that this bridge can be the maker
/// and sign for itself in orders. Always succeeds.
/// @return magicValue Magic success bytes, always.
function isValidSignature(
bytes32,
bytes calldata
)
external
view
returns (bytes4 magicValue)
{
return LEGACY_WALLET_MAGIC_VALUE;
}
}

169
contracts/asset-proxy/contracts/src/bridges/KyberBridge.sol
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@@ -1,169 +0,0 @@
/*
Copyright 2020 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
pragma experimental ABIEncoderV2;
import "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol";
import "@0x/contracts-erc20/contracts/src/interfaces/IEtherToken.sol";
import "@0x/contracts-erc20/contracts/src/LibERC20Token.sol";
import "@0x/contracts-exchange-libs/contracts/src/IWallet.sol";
import "@0x/contracts-utils/contracts/src/DeploymentConstants.sol";
import "@0x/contracts-utils/contracts/src/LibSafeMath.sol";
import "../interfaces/IERC20Bridge.sol";
import "../interfaces/IKyberNetworkProxy.sol";
// solhint-disable space-after-comma
contract KyberBridge is
IERC20Bridge,
IWallet,
DeploymentConstants
{
using LibSafeMath for uint256;
// @dev Structure used internally to get around stack limits.
struct TradeState {
IKyberNetworkProxy kyber;
IEtherToken weth;
address fromTokenAddress;
uint256 fromTokenBalance;
uint256 payableAmount;
uint256 conversionRate;
bytes hint;
}
/// @dev Kyber ETH pseudo-address.
address constant public KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
/// @dev `bridgeTransferFrom()` failure result.
bytes4 constant private BRIDGE_FAILED = 0x0;
/// @dev Precision of Kyber rates.
uint256 constant private KYBER_RATE_BASE = 10 ** 18;
// solhint-disable no-empty-blocks
/// @dev Payable fallback to receive ETH from Kyber/WETH.
function ()
external
payable
{
// Poor man's receive in 0.5.9
require(msg.data.length == 0);
}
/// @dev Callback for `IKyberBridge`. Tries to buy `amount` of
/// `toTokenAddress` tokens by selling the entirety of the opposing asset
/// to the `KyberNetworkProxy` contract, then transfers the bought
/// tokens to `to`.
/// @param toTokenAddress The token to give to `to`.
/// @param from The maker (this contract).
/// @param to The recipient of the bought tokens.
/// @param amount Minimum amount of `toTokenAddress` tokens to buy.
/// @param bridgeData The abi-encoeded "from" token address.
/// @return success The magic bytes if successful.
function bridgeTransferFrom(
address toTokenAddress,
address from,
address to,
uint256 amount,
bytes calldata bridgeData
)
external
returns (bytes4 success)
{
TradeState memory state;
state.kyber = IKyberNetworkProxy(_getKyberNetworkProxyAddress());
state.weth = IEtherToken(_getWethAddress());
// Decode the bridge data to get the `fromTokenAddress`.
(state.fromTokenAddress, state.hint) = abi.decode(bridgeData, (address, bytes));
// Query the balance of "from" tokens.
state.fromTokenBalance = IERC20Token(state.fromTokenAddress).balanceOf(address(this));
if (state.fromTokenBalance == 0) {
// Return failure if no input tokens.
return BRIDGE_FAILED;
}
if (state.fromTokenAddress == toTokenAddress) {
// Just transfer the tokens if they're the same.
LibERC20Token.transfer(state.fromTokenAddress, to, state.fromTokenBalance);
return BRIDGE_SUCCESS;
}
if (state.fromTokenAddress == address(state.weth)) {
// From WETH
state.fromTokenAddress = KYBER_ETH_ADDRESS;
state.payableAmount = state.fromTokenBalance;
state.weth.withdraw(state.fromTokenBalance);
} else {
LibERC20Token.approveIfBelow(
state.fromTokenAddress,
address(state.kyber),
state.fromTokenBalance
);
}
bool isToTokenWeth = toTokenAddress == address(state.weth);
// Try to sell all of this contract's input token balance through
// `KyberNetworkProxy.trade()`.
uint256 boughtAmount = state.kyber.tradeWithHint.value(state.payableAmount)(
// Input token.
state.fromTokenAddress,
// Sell amount.
state.fromTokenBalance,
// Output token.
isToTokenWeth ? KYBER_ETH_ADDRESS : toTokenAddress,
// Transfer to this contract if converting to ETH, otherwise
// transfer directly to the recipient.
isToTokenWeth ? address(uint160(address(this))) : address(uint160(to)),
// Buy as much as possible.
uint256(-1),
// The minimum conversion rate
1,
// No affiliate address.
address(0),
state.hint
);
// Wrap ETH output and transfer to recipient.
if (isToTokenWeth) {
state.weth.deposit.value(boughtAmount)();
state.weth.transfer(to, boughtAmount);
}
emit ERC20BridgeTransfer(
state.fromTokenAddress == KYBER_ETH_ADDRESS ? address(state.weth) : state.fromTokenAddress,
toTokenAddress,
state.fromTokenBalance,
boughtAmount,
from,
to
);
return BRIDGE_SUCCESS;
}
/// @dev `SignatureType.Wallet` callback, so that this bridge can be the maker
/// and sign for itself in orders. Always succeeds.
/// @return magicValue Magic success bytes, always.
function isValidSignature(
bytes32,
bytes calldata
)
external
view
returns (bytes4 magicValue)
{
return LEGACY_WALLET_MAGIC_VALUE;
}
}

94
contracts/asset-proxy/contracts/src/bridges/MStableBridge.sol
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@@ -1,94 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
pragma experimental ABIEncoderV2;
import "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol";
import "@0x/contracts-erc20/contracts/src/LibERC20Token.sol";
import "@0x/contracts-exchange-libs/contracts/src/IWallet.sol";
import "@0x/contracts-utils/contracts/src/DeploymentConstants.sol";
import "../interfaces/IERC20Bridge.sol";
import "../interfaces/IMStable.sol";
contract MStableBridge is
IERC20Bridge,
IWallet,
DeploymentConstants
{
/// @dev Swaps specified tokens against the mStable mUSD contract
/// @param toTokenAddress The token to give to `to` (i.e DAI, USDC, USDT).
/// @param from The maker (this contract).
/// @param to The recipient of the bought tokens.
/// @param amount Minimum amount of `toTokenAddress` tokens to buy.
/// @param bridgeData The abi-encoded "from" token address.
/// @return success The magic bytes if successful.
// solhint-disable no-unused-vars
function bridgeTransferFrom(
address toTokenAddress,
address from,
address to,
uint256 amount,
bytes calldata bridgeData
)
external
returns (bytes4 success)
{
// Decode the bridge data to get the `fromTokenAddress`.
(address fromTokenAddress) = abi.decode(bridgeData, (address));
IMStable exchange = IMStable(_getMUsdAddress());
uint256 fromTokenBalance = IERC20Token(fromTokenAddress).balanceOf(address(this));
// Grant an allowance to the exchange to spend `fromTokenAddress` token.
LibERC20Token.approveIfBelow(fromTokenAddress, address(exchange), fromTokenBalance);
// Try to sell all of this contract's `fromTokenAddress` token balance.
uint256 boughtAmount = exchange.swap(
fromTokenAddress,
toTokenAddress,
fromTokenBalance,
to
);
emit ERC20BridgeTransfer(
fromTokenAddress,
toTokenAddress,
fromTokenBalance,
boughtAmount,
from,
to
);
return BRIDGE_SUCCESS;
}
/// @dev `SignatureType.Wallet` callback, so that this bridge can be the maker
/// and sign for itself in orders. Always succeeds.
/// @return magicValue Magic success bytes, always.
function isValidSignature(
bytes32,
bytes calldata
)
external
view
returns (bytes4 magicValue)
{
return LEGACY_WALLET_MAGIC_VALUE;
}
}

55
contracts/asset-proxy/contracts/src/bridges/MixinGasToken.sol
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@@ -1,55 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.16;
import "@0x/contracts-utils/contracts/src/DeploymentConstants.sol";
import "../interfaces/IGasToken.sol";
contract MixinGasToken is
DeploymentConstants
{
/// @dev Frees gas tokens based on the amount of gas consumed in the function
modifier freesGasTokens {
uint256 gasBefore = gasleft();
_;
IGasToken gst = IGasToken(_getGstAddress());
if (address(gst) != address(0)) {
// (gasUsed + FREE_BASE) / (2 * REIMBURSE - FREE_TOKEN)
// 14154 24000 6870
uint256 value = (gasBefore - gasleft() + 14154) / 41130;
gst.freeUpTo(value);
}
}
/// @dev Frees gas tokens using the balance of `from`. Amount freed is based
/// on the gas consumed in the function
modifier freesGasTokensFromCollector() {
uint256 gasBefore = gasleft();
_;
IGasToken gst = IGasToken(_getGstAddress());
if (address(gst) != address(0)) {
// (gasUsed + FREE_BASE) / (2 * REIMBURSE - FREE_TOKEN)
// 14154 24000 6870
uint256 value = (gasBefore - gasleft() + 14154) / 41130;
gst.freeFromUpTo(_getGstCollectorAddress(), value);
}
}
}

148
contracts/asset-proxy/contracts/src/bridges/MooniswapBridge.sol
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@@ -1,148 +0,0 @@
/*
Copyright 2020 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
pragma experimental ABIEncoderV2;
import "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol";
import "@0x/contracts-erc20/contracts/src/interfaces/IEtherToken.sol";
import "@0x/contracts-erc20/contracts/src/LibERC20Token.sol";
import "@0x/contracts-exchange-libs/contracts/src/IWallet.sol";
import "@0x/contracts-utils/contracts/src/DeploymentConstants.sol";
import "../interfaces/IERC20Bridge.sol";
import "../interfaces/IMooniswap.sol";
// solhint-disable space-after-comma
// solhint-disable not-rely-on-time
contract MooniswapBridge is
IERC20Bridge,
IWallet,
DeploymentConstants
{
struct TransferState {
IMooniswap pool;
uint256 fromTokenBalance;
IEtherToken weth;
uint256 boughtAmount;
address fromTokenAddress;
address toTokenAddress;
}
// solhint-disable no-empty-blocks
/// @dev Payable fallback to receive ETH from uniswap.
function ()
external
payable
{}
/// @dev Callback for `IERC20Bridge`. Tries to buy `amount` of
/// `toTokenAddress` tokens by selling the entirety of the `fromTokenAddress`
/// token encoded in the bridge data.
/// @param toTokenAddress The token to buy and transfer to `to`.
/// @param from The maker (this contract).
/// @param to The recipient of the bought tokens.
/// @param amount Minimum amount of `toTokenAddress` tokens to buy.
/// @param bridgeData The abi-encoded path of token addresses. Last element must be toTokenAddress
/// @return success The magic bytes if successful.
function bridgeTransferFrom(
address toTokenAddress,
address from,
address to,
uint256 amount,
bytes calldata bridgeData
)
external
returns (bytes4 success)
{
// State memory object to avoid stack overflows.
TransferState memory state;
// Decode the bridge data to get the `fromTokenAddress`.
address fromTokenAddress = abi.decode(bridgeData, (address));
// Get the weth contract.
state.weth = IEtherToken(_getWethAddress());
// Get our balance of `fromTokenAddress` token.
state.fromTokenBalance = IERC20Token(fromTokenAddress).balanceOf(address(this));
state.fromTokenAddress = fromTokenAddress == address(state.weth) ? address(0) : fromTokenAddress;
state.toTokenAddress = toTokenAddress == address(state.weth) ? address(0) : toTokenAddress;
state.pool = IMooniswap(
IMooniswapRegistry(_getMooniswapAddress()).pools(
state.fromTokenAddress,
state.toTokenAddress
)
);
// withdraw WETH to ETH
if (state.fromTokenAddress == address(0)) {
state.weth.withdraw(state.fromTokenBalance);
} else {
// Grant the pool an allowance.
LibERC20Token.approveIfBelow(
state.fromTokenAddress,
address(state.pool),
state.fromTokenBalance
);
}
uint256 ethValue = state.fromTokenAddress == address(0) ? state.fromTokenBalance : 0;
state.boughtAmount = state.pool.swap.value(ethValue)(
state.fromTokenAddress,
state.toTokenAddress,
state.fromTokenBalance,
amount,
address(0)
);
// Deposit to WETH
if (state.toTokenAddress == address(0)) {
state.weth.deposit.value(state.boughtAmount)();
}
// Transfer funds to `to`
LibERC20Token.transfer(toTokenAddress, to, state.boughtAmount);
emit ERC20BridgeTransfer(
// input token
fromTokenAddress,
// output token
toTokenAddress,
// input token amount
state.fromTokenBalance,
// output token amount
state.boughtAmount,
from,
to
);
return BRIDGE_SUCCESS;
}
/// @dev `SignatureType.Wallet` callback, so that this bridge can be the maker
/// and sign for itself in orders. Always succeeds.
/// @return magicValue Success bytes, always.
function isValidSignature(
bytes32,
bytes calldata
)
external
view
returns (bytes4 magicValue)
{
return LEGACY_WALLET_MAGIC_VALUE;
}
}

95
contracts/asset-proxy/contracts/src/bridges/ShellBridge.sol
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@@ -1,95 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
pragma experimental ABIEncoderV2;
import "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol";
import "@0x/contracts-erc20/contracts/src/LibERC20Token.sol";
import "@0x/contracts-exchange-libs/contracts/src/IWallet.sol";
import "@0x/contracts-utils/contracts/src/DeploymentConstants.sol";
import "../interfaces/IERC20Bridge.sol";
import "../interfaces/IShell.sol";
contract ShellBridge is
IERC20Bridge,
IWallet,
DeploymentConstants
{
/// @dev Swaps specified tokens against the Shell contract
/// @param toTokenAddress The token to give to `to`.
/// @param from The maker (this contract).
/// @param to The recipient of the bought tokens.
/// @param amount Minimum amount of `toTokenAddress` tokens to buy.
/// @param bridgeData The abi-encoded "from" token address.
/// @return success The magic bytes if successful.
// solhint-disable no-unused-vars
function bridgeTransferFrom(
address toTokenAddress,
address from,
address to,
uint256 amount,
bytes calldata bridgeData
)
external
returns (bytes4 success)
{
// Decode the bridge data to get the `fromTokenAddress` and `pool`.
(address fromTokenAddress, address pool) = abi.decode(bridgeData, (address, address));
uint256 fromTokenBalance = IERC20Token(fromTokenAddress).balanceOf(address(this));
// Grant an allowance to the exchange to spend `fromTokenAddress` token.
LibERC20Token.approveIfBelow(fromTokenAddress, pool, fromTokenBalance);
// Try to sell all of this contract's `fromTokenAddress` token balance.
uint256 boughtAmount = IShell(pool).originSwap(
fromTokenAddress,
toTokenAddress,
fromTokenBalance,
amount, // min amount
block.timestamp + 1
);
LibERC20Token.transfer(toTokenAddress, to, boughtAmount);
emit ERC20BridgeTransfer(
fromTokenAddress,
toTokenAddress,
fromTokenBalance,
boughtAmount,
from,
to
);
return BRIDGE_SUCCESS;
}
/// @dev `SignatureType.Wallet` callback, so that this bridge can be the maker
/// and sign for itself in orders. Always succeeds.
/// @return magicValue Magic success bytes, always.
function isValidSignature(
bytes32,
bytes calldata
)
external
view
returns (bytes4 magicValue)
{
return LEGACY_WALLET_MAGIC_VALUE;
}
}

119
contracts/asset-proxy/contracts/src/bridges/SnowSwapBridge.sol
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@@ -1,119 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
pragma experimental ABIEncoderV2;
import "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol";
import "@0x/contracts-erc20/contracts/src/LibERC20Token.sol";
import "@0x/contracts-exchange-libs/contracts/src/IWallet.sol";
import "@0x/contracts-utils/contracts/src/DeploymentConstants.sol";
import "../interfaces/IERC20Bridge.sol";
import "../interfaces/ICurve.sol";
// solhint-disable not-rely-on-time
// solhint-disable space-after-comma
contract SnowSwapBridge is
IERC20Bridge,
IWallet,
DeploymentConstants
{
struct SnowSwapBridgeData {
address curveAddress;
bytes4 exchangeFunctionSelector;
address fromTokenAddress;
int128 fromCoinIdx;
int128 toCoinIdx;
}
/// @dev Callback for `ICurve`. Tries to buy `amount` of
/// `toTokenAddress` tokens by selling the entirety of the opposing asset
/// (DAI, USDC) to the Curve contract, then transfers the bought
/// tokens to `to`.
/// @param toTokenAddress The token to give to `to` (i.e DAI, USDC, USDT).
/// @param from The maker (this contract).
/// @param to The recipient of the bought tokens.
/// @param amount Minimum amount of `toTokenAddress` tokens to buy.
/// @param bridgeData The abi-encoeded "from" token address.
/// @return success The magic bytes if successful.
function bridgeTransferFrom(
address toTokenAddress,
address from,
address to,
uint256 amount,
bytes calldata bridgeData
)
external
returns (bytes4 success)
{
// Decode the bridge data to get the SnowSwap metadata.
SnowSwapBridgeData memory data = abi.decode(bridgeData, (SnowSwapBridgeData));
require(toTokenAddress != data.fromTokenAddress, "SnowSwapBridge/INVALID_PAIR");
uint256 fromTokenBalance = IERC20Token(data.fromTokenAddress).balanceOf(address(this));
// Grant an allowance to the exchange to spend `fromTokenAddress` token.
LibERC20Token.approveIfBelow(data.fromTokenAddress, data.curveAddress, fromTokenBalance);
// Try to sell all of this contract's `fromTokenAddress` token balance.
{
(bool didSucceed, bytes memory resultData) =
data.curveAddress.call(abi.encodeWithSelector(
data.exchangeFunctionSelector,
data.fromCoinIdx,
data.toCoinIdx,
// dx
fromTokenBalance,
// min dy
amount
));
if (!didSucceed) {
assembly { revert(add(resultData, 32), mload(resultData)) }
}
}
uint256 toTokenBalance = IERC20Token(toTokenAddress).balanceOf(address(this));
// Transfer the converted `toToken`s to `to`.
LibERC20Token.transfer(toTokenAddress, to, toTokenBalance);
emit ERC20BridgeTransfer(
data.fromTokenAddress,
toTokenAddress,
fromTokenBalance,
toTokenBalance,
from,
to
);
return BRIDGE_SUCCESS;
}
/// @dev `SignatureType.Wallet` callback, so that this bridge can be the maker
/// and sign for itself in orders. Always succeeds.
/// @return magicValue Magic success bytes, always.
function isValidSignature(
bytes32,
bytes calldata
)
external
view
returns (bytes4 magicValue)
{
return LEGACY_WALLET_MAGIC_VALUE;
}
}

136
contracts/asset-proxy/contracts/src/bridges/SushiSwapBridge.sol
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@@ -1,136 +0,0 @@
/*
Copyright 2020 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
pragma experimental ABIEncoderV2;
import "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol";
import "@0x/contracts-erc20/contracts/src/interfaces/IEtherToken.sol";
import "@0x/contracts-erc20/contracts/src/LibERC20Token.sol";
import "@0x/contracts-exchange-libs/contracts/src/IWallet.sol";
import "@0x/contracts-utils/contracts/src/LibAddressArray.sol";
import "@0x/contracts-utils/contracts/src/DeploymentConstants.sol";
import "../interfaces/IUniswapV2Router01.sol";
import "../interfaces/IERC20Bridge.sol";
// solhint-disable space-after-comma
// solhint-disable not-rely-on-time
contract SushiSwapBridge is
IERC20Bridge,
IWallet,
DeploymentConstants
{
struct TransferState {
address[] path;
address router;
uint256 fromTokenBalance;
}
/// @dev Callback for `IERC20Bridge`. Tries to buy `amount` of
/// `toTokenAddress` tokens by selling the entirety of the `fromTokenAddress`
/// token encoded in the bridge data.
/// @param toTokenAddress The token to buy and transfer to `to`.
/// @param from The maker (this contract).
/// @param to The recipient of the bought tokens.
/// @param amount Minimum amount of `toTokenAddress` tokens to buy.
/// @param bridgeData The abi-encoded path of token addresses. Last element must be toTokenAddress
/// @return success The magic bytes if successful.
function bridgeTransferFrom(
address toTokenAddress,
address from,
address to,
uint256 amount,
bytes calldata bridgeData
)
external
returns (bytes4 success)
{
// hold variables to get around stack depth limitations
TransferState memory state;
// Decode the bridge data to get the `fromTokenAddress`.
// solhint-disable indent
(state.path, state.router) = abi.decode(bridgeData, (address[], address));
// solhint-enable indent
require(state.path.length >= 2, "SushiSwapBridge/PATH_LENGTH_MUST_BE_AT_LEAST_TWO");
require(state.path[state.path.length - 1] == toTokenAddress, "SushiSwapBridge/LAST_ELEMENT_OF_PATH_MUST_MATCH_OUTPUT_TOKEN");
// Just transfer the tokens if they're the same.
if (state.path[0] == toTokenAddress) {
LibERC20Token.transfer(state.path[0], to, amount);
return BRIDGE_SUCCESS;
}
// Get our balance of `fromTokenAddress` token.
state.fromTokenBalance = IERC20Token(state.path[0]).balanceOf(address(this));
// Grant the SushiSwap router an allowance.
LibERC20Token.approveIfBelow(
state.path[0],
state.router,
state.fromTokenBalance
);
// Buy as much `toTokenAddress` token with `fromTokenAddress` token
// and transfer it to `to`.
IUniswapV2Router01 router = IUniswapV2Router01(state.router);
uint[] memory amounts = router.swapExactTokensForTokens(
// Sell all tokens we hold.
state.fromTokenBalance,
// Minimum buy amount.
amount,
// Convert `fromTokenAddress` to `toTokenAddress`.
state.path,
// Recipient is `to`.
to,
// Expires after this block.
block.timestamp
);
emit ERC20BridgeTransfer(
// input token
state.path[0],
// output token
toTokenAddress,
// input token amount
state.fromTokenBalance,
// output token amount
amounts[amounts.length - 1],
from,
to
);
return BRIDGE_SUCCESS;
}
/// @dev `SignatureType.Wallet` callback, so that this bridge can be the maker
/// and sign for itself in orders. Always succeeds.
/// @return magicValue Success bytes, always.
function isValidSignature(
bytes32,
bytes calldata
)
external
view
returns (bytes4 magicValue)
{
return LEGACY_WALLET_MAGIC_VALUE;
}
}

119
contracts/asset-proxy/contracts/src/bridges/SwerveBridge.sol
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@@ -1,119 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
pragma experimental ABIEncoderV2;
import "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol";
import "@0x/contracts-erc20/contracts/src/LibERC20Token.sol";
import "@0x/contracts-exchange-libs/contracts/src/IWallet.sol";
import "@0x/contracts-utils/contracts/src/DeploymentConstants.sol";
import "../interfaces/IERC20Bridge.sol";
import "../interfaces/ICurve.sol";
// solhint-disable not-rely-on-time
// solhint-disable space-after-comma
contract SwerveBridge is
IERC20Bridge,
IWallet,
DeploymentConstants
{
struct SwerveBridgeData {
address curveAddress;
bytes4 exchangeFunctionSelector;
address fromTokenAddress;
int128 fromCoinIdx;
int128 toCoinIdx;
}
/// @dev Callback for `ICurve`. Tries to buy `amount` of
/// `toTokenAddress` tokens by selling the entirety of the opposing asset
/// (DAI, USDC) to the Curve contract, then transfers the bought
/// tokens to `to`.
/// @param toTokenAddress The token to give to `to` (i.e DAI, USDC, USDT).
/// @param from The maker (this contract).
/// @param to The recipient of the bought tokens.
/// @param amount Minimum amount of `toTokenAddress` tokens to buy.
/// @param bridgeData The abi-encoeded "from" token address.
/// @return success The magic bytes if successful.
function bridgeTransferFrom(
address toTokenAddress,
address from,
address to,
uint256 amount,
bytes calldata bridgeData
)
external
returns (bytes4 success)
{
// Decode the bridge data to get the SwerveBridgeData metadata.
SwerveBridgeData memory data = abi.decode(bridgeData, (SwerveBridgeData));
require(toTokenAddress != data.fromTokenAddress, "SwerveBridge/INVALID_PAIR");
uint256 fromTokenBalance = IERC20Token(data.fromTokenAddress).balanceOf(address(this));
// Grant an allowance to the exchange to spend `fromTokenAddress` token.
LibERC20Token.approveIfBelow(data.fromTokenAddress, data.curveAddress, fromTokenBalance);
// Try to sell all of this contract's `fromTokenAddress` token balance.
{
(bool didSucceed, bytes memory resultData) =
data.curveAddress.call(abi.encodeWithSelector(
data.exchangeFunctionSelector,
data.fromCoinIdx,
data.toCoinIdx,
// dx
fromTokenBalance,
// min dy
amount
));
if (!didSucceed) {
assembly { revert(add(resultData, 32), mload(resultData)) }
}
}
uint256 toTokenBalance = IERC20Token(toTokenAddress).balanceOf(address(this));
// Transfer the converted `toToken`s to `to`.
LibERC20Token.transfer(toTokenAddress, to, toTokenBalance);
emit ERC20BridgeTransfer(
data.fromTokenAddress,
toTokenAddress,
fromTokenBalance,
toTokenBalance,
from,
to
);
return BRIDGE_SUCCESS;
}
/// @dev `SignatureType.Wallet` callback, so that this bridge can be the maker
/// and sign for itself in orders. Always succeeds.
/// @return magicValue Magic success bytes, always.
function isValidSignature(
bytes32,
bytes calldata
)
external
view
returns (bytes4 magicValue)
{
return LEGACY_WALLET_MAGIC_VALUE;
}
}

220
contracts/asset-proxy/contracts/src/bridges/UniswapBridge.sol
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@@ -1,220 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
pragma experimental ABIEncoderV2;
import "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol";
import "@0x/contracts-erc20/contracts/src/interfaces/IEtherToken.sol";
import "@0x/contracts-erc20/contracts/src/LibERC20Token.sol";
import "@0x/contracts-exchange-libs/contracts/src/IWallet.sol";
import "@0x/contracts-utils/contracts/src/DeploymentConstants.sol";
import "../interfaces/IUniswapExchangeFactory.sol";
import "../interfaces/IUniswapExchange.sol";
import "../interfaces/IERC20Bridge.sol";
// solhint-disable space-after-comma
// solhint-disable not-rely-on-time
contract UniswapBridge is
IERC20Bridge,
IWallet,
DeploymentConstants
{
// Struct to hold `bridgeTransferFrom()` local variables in memory and to avoid
// stack overflows.
struct TransferState {
IUniswapExchange exchange;
uint256 fromTokenBalance;
IEtherToken weth;
uint256 boughtAmount;
}
// solhint-disable no-empty-blocks
/// @dev Payable fallback to receive ETH from uniswap.
function ()
external
payable
{}
/// @dev Callback for `IERC20Bridge`. Tries to buy `amount` of
/// `toTokenAddress` tokens by selling the entirety of the `fromTokenAddress`
/// token encoded in the bridge data.
/// @param toTokenAddress The token to buy and transfer to `to`.
/// @param from The maker (this contract).
/// @param to The recipient of the bought tokens.
/// @param amount Minimum amount of `toTokenAddress` tokens to buy.
/// @param bridgeData The abi-encoded "from" token address.
/// @return success The magic bytes if successful.
function bridgeTransferFrom(
address toTokenAddress,
address from,
address to,
uint256 amount,
bytes calldata bridgeData
)
external
returns (bytes4 success)
{
// State memory object to avoid stack overflows.
TransferState memory state;
// Decode the bridge data to get the `fromTokenAddress`.
(address fromTokenAddress) = abi.decode(bridgeData, (address));
// Just transfer the tokens if they're the same.
if (fromTokenAddress == toTokenAddress) {
LibERC20Token.transfer(fromTokenAddress, to, amount);
return BRIDGE_SUCCESS;
}
// Get the exchange for the token pair.
state.exchange = _getUniswapExchangeForTokenPair(
fromTokenAddress,
toTokenAddress
);
// Get our balance of `fromTokenAddress` token.
state.fromTokenBalance = IERC20Token(fromTokenAddress).balanceOf(address(this));
// Get the weth contract.
state.weth = IEtherToken(_getWethAddress());
// Convert from WETH to a token.
if (fromTokenAddress == address(state.weth)) {
// Unwrap the WETH.
state.weth.withdraw(state.fromTokenBalance);
// Buy as much of `toTokenAddress` token with ETH as possible and
// transfer it to `to`.
state.boughtAmount = state.exchange.ethToTokenTransferInput.value(state.fromTokenBalance)(
// Minimum buy amount.
amount,
// Expires after this block.
block.timestamp,
// Recipient is `to`.
to
);
// Convert from a token to WETH.
} else if (toTokenAddress == address(state.weth)) {
// Grant the exchange an allowance.
_grantExchangeAllowance(state.exchange, fromTokenAddress, state.fromTokenBalance);
// Buy as much ETH with `fromTokenAddress` token as possible.
state.boughtAmount = state.exchange.tokenToEthSwapInput(
// Sell all tokens we hold.
state.fromTokenBalance,
// Minimum buy amount.
amount,
// Expires after this block.
block.timestamp
);
// Wrap the ETH.
state.weth.deposit.value(state.boughtAmount)();
// Transfer the WETH to `to`.
IEtherToken(toTokenAddress).transfer(to, state.boughtAmount);
// Convert from one token to another.
} else {
// Grant the exchange an allowance.
_grantExchangeAllowance(state.exchange, fromTokenAddress, state.fromTokenBalance);
// Buy as much `toTokenAddress` token with `fromTokenAddress` token
// and transfer it to `to`.
state.boughtAmount = state.exchange.tokenToTokenTransferInput(
// Sell all tokens we hold.
state.fromTokenBalance,
// Minimum buy amount.
amount,
// Must buy at least 1 intermediate ETH.
1,
// Expires after this block.
block.timestamp,
// Recipient is `to`.
to,
// Convert to `toTokenAddress`.
toTokenAddress
);
}
emit ERC20BridgeTransfer(
fromTokenAddress,
toTokenAddress,
state.fromTokenBalance,
state.boughtAmount,
from,
to
);
return BRIDGE_SUCCESS;
}
/// @dev `SignatureType.Wallet` callback, so that this bridge can be the maker
/// and sign for itself in orders. Always succeeds.
/// @return magicValue Success bytes, always.
function isValidSignature(
bytes32,
bytes calldata
)
external
view
returns (bytes4 magicValue)
{
return LEGACY_WALLET_MAGIC_VALUE;
}
/// @dev Grants an unlimited allowance to the exchange for its token
/// on behalf of this contract.
/// @param exchange The Uniswap token exchange.
/// @param tokenAddress The token address for the exchange.
/// @param minimumAllowance The minimum necessary allowance.
function _grantExchangeAllowance(
IUniswapExchange exchange,
address tokenAddress,
uint256 minimumAllowance
)
private
{
LibERC20Token.approveIfBelow(
tokenAddress,
address(exchange),
minimumAllowance
);
}
/// @dev Retrieves the uniswap exchange for a given token pair.
/// In the case of a WETH-token exchange, this will be the non-WETH token.
/// In th ecase of a token-token exchange, this will be the first token.
/// @param fromTokenAddress The address of the token we are converting from.
/// @param toTokenAddress The address of the token we are converting to.
/// @return exchange The uniswap exchange.
function _getUniswapExchangeForTokenPair(
address fromTokenAddress,
address toTokenAddress
)
private
view
returns (IUniswapExchange exchange)
{
address exchangeTokenAddress = fromTokenAddress;
// Whichever isn't WETH is the exchange token.
if (fromTokenAddress == _getWethAddress()) {
exchangeTokenAddress = toTokenAddress;
}
exchange = IUniswapExchange(
IUniswapExchangeFactory(_getUniswapExchangeFactoryAddress())
.getExchange(exchangeTokenAddress)
);
require(address(exchange) != address(0), "NO_UNISWAP_EXCHANGE_FOR_TOKEN");
return exchange;
}
}

135
contracts/asset-proxy/contracts/src/bridges/UniswapV2Bridge.sol
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@@ -1,135 +0,0 @@
/*
Copyright 2020 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
pragma experimental ABIEncoderV2;
import "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol";
import "@0x/contracts-erc20/contracts/src/interfaces/IEtherToken.sol";
import "@0x/contracts-erc20/contracts/src/LibERC20Token.sol";
import "@0x/contracts-exchange-libs/contracts/src/IWallet.sol";
import "@0x/contracts-utils/contracts/src/LibAddressArray.sol";
import "@0x/contracts-utils/contracts/src/DeploymentConstants.sol";
import "../interfaces/IUniswapV2Router01.sol";
import "../interfaces/IERC20Bridge.sol";
// solhint-disable space-after-comma
// solhint-disable not-rely-on-time
contract UniswapV2Bridge is
IERC20Bridge,
IWallet,
DeploymentConstants
{
struct TransferState {
address[] path;
uint256 fromTokenBalance;
}
/// @dev Callback for `IERC20Bridge`. Tries to buy `amount` of
/// `toTokenAddress` tokens by selling the entirety of the `fromTokenAddress`
/// token encoded in the bridge data.
/// @param toTokenAddress The token to buy and transfer to `to`.
/// @param from The maker (this contract).
/// @param to The recipient of the bought tokens.
/// @param amount Minimum amount of `toTokenAddress` tokens to buy.
/// @param bridgeData The abi-encoded path of token addresses. Last element must be toTokenAddress
/// @return success The magic bytes if successful.
function bridgeTransferFrom(
address toTokenAddress,
address from,
address to,
uint256 amount,
bytes calldata bridgeData
)
external
returns (bytes4 success)
{
// hold variables to get around stack depth limitations
TransferState memory state;
// Decode the bridge data to get the `fromTokenAddress`.
// solhint-disable indent
state.path = abi.decode(bridgeData, (address[]));
// solhint-enable indent
require(state.path.length >= 2, "UniswapV2Bridge/PATH_LENGTH_MUST_BE_AT_LEAST_TWO");
require(state.path[state.path.length - 1] == toTokenAddress, "UniswapV2Bridge/LAST_ELEMENT_OF_PATH_MUST_MATCH_OUTPUT_TOKEN");
// Just transfer the tokens if they're the same.
if (state.path[0] == toTokenAddress) {
LibERC20Token.transfer(state.path[0], to, amount);
return BRIDGE_SUCCESS;
}
// Get our balance of `fromTokenAddress` token.
state.fromTokenBalance = IERC20Token(state.path[0]).balanceOf(address(this));
// Grant the Uniswap router an allowance.
LibERC20Token.approveIfBelow(
state.path[0],
_getUniswapV2Router01Address(),
state.fromTokenBalance
);
// Buy as much `toTokenAddress` token with `fromTokenAddress` token
// and transfer it to `to`.
IUniswapV2Router01 router = IUniswapV2Router01(_getUniswapV2Router01Address());
uint[] memory amounts = router.swapExactTokensForTokens(
// Sell all tokens we hold.
state.fromTokenBalance,
// Minimum buy amount.
amount,
// Convert `fromTokenAddress` to `toTokenAddress`.
state.path,
// Recipient is `to`.
to,
// Expires after this block.
block.timestamp
);
emit ERC20BridgeTransfer(
// input token
state.path[0],
// output token
toTokenAddress,
// input token amount
state.fromTokenBalance,
// output token amount
amounts[amounts.length - 1],
from,
to
);
return BRIDGE_SUCCESS;
}
/// @dev `SignatureType.Wallet` callback, so that this bridge can be the maker
/// and sign for itself in orders. Always succeeds.
/// @return magicValue Success bytes, always.
function isValidSignature(
bytes32,
bytes calldata
)
external
view
returns (bytes4 magicValue)
{
return LEGACY_WALLET_MAGIC_VALUE;
}
}

88
contracts/asset-proxy/contracts/src/interfaces/IAssetData.sol
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@@ -1,88 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
// solhint-disable
pragma solidity ^0.5.9;
pragma experimental ABIEncoderV2;
// @dev Interface of the asset proxy's assetData.
// The asset proxies take an ABI encoded `bytes assetData` as argument.
// This argument is ABI encoded as one of the methods of this interface.
interface IAssetData {
/// @dev Function signature for encoding ERC20 assetData.
/// @param tokenAddress Address of ERC20Token contract.
function ERC20Token(address tokenAddress)
external;
/// @dev Function signature for encoding ERC721 assetData.
/// @param tokenAddress Address of ERC721 token contract.
/// @param tokenId Id of ERC721 token to be transferred.
function ERC721Token(
address tokenAddress,
uint256 tokenId
)
external;
/// @dev Function signature for encoding ERC1155 assetData.
/// @param tokenAddress Address of ERC1155 token contract.
/// @param tokenIds Array of ids of tokens to be transferred.
/// @param values Array of values that correspond to each token id to be transferred.
/// Note that each value will be multiplied by the amount being filled in the order before transferring.
/// @param callbackData Extra data to be passed to receiver's `onERC1155Received` callback function.
function ERC1155Assets(
address tokenAddress,
uint256[] calldata tokenIds,
uint256[] calldata values,
bytes calldata callbackData
)
external;
/// @dev Function signature for encoding MultiAsset assetData.
/// @param values Array of amounts that correspond to each asset to be transferred.
/// Note that each value will be multiplied by the amount being filled in the order before transferring.
/// @param nestedAssetData Array of assetData fields that will be be dispatched to their correspnding AssetProxy contract.
function MultiAsset(
uint256[] calldata values,
bytes[] calldata nestedAssetData
)
external;
/// @dev Function signature for encoding StaticCall assetData.
/// @param staticCallTargetAddress Address that will execute the staticcall.
/// @param staticCallData Data that will be executed via staticcall on the staticCallTargetAddress.
/// @param expectedReturnDataHash Keccak-256 hash of the expected staticcall return data.
function StaticCall(
address staticCallTargetAddress,
bytes calldata staticCallData,
bytes32 expectedReturnDataHash
)
external;
/// @dev Function signature for encoding ERC20Bridge assetData.
/// @param tokenAddress Address of token to transfer.
/// @param bridgeAddress Address of the bridge contract.
/// @param bridgeData Arbitrary data to be passed to the bridge contract.
function ERC20Bridge(
address tokenAddress,
address bridgeAddress,
bytes calldata bridgeData
)
external;
}

43
contracts/asset-proxy/contracts/src/interfaces/IAssetProxy.sol
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@@ -1,43 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
contract IAssetProxy {
/// @dev Transfers assets. Either succeeds or throws.
/// @param assetData Byte array encoded for the respective asset proxy.
/// @param from Address to transfer asset from.
/// @param to Address to transfer asset to.
/// @param amount Amount of asset to transfer.
function transferFrom(
bytes calldata assetData,
address from,
address to,
uint256 amount
)
external;
/// @dev Gets the proxy id associated with the proxy address.
/// @return Proxy id.
function getProxyId()
external
pure
returns (bytes4);
}

43
contracts/asset-proxy/contracts/src/interfaces/IAssetProxyDispatcher.sol
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@@ -1,43 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
contract IAssetProxyDispatcher {
// Logs registration of new asset proxy
event AssetProxyRegistered(
bytes4 id, // Id of new registered AssetProxy.
address assetProxy // Address of new registered AssetProxy.
);
/// @dev Registers an asset proxy to its asset proxy id.
/// Once an asset proxy is registered, it cannot be unregistered.
/// @param assetProxy Address of new asset proxy to register.
function registerAssetProxy(address assetProxy)
external;
/// @dev Gets an asset proxy.
/// @param assetProxyId Id of the asset proxy.
/// @return The asset proxy registered to assetProxyId. Returns 0x0 if no proxy is registered.
function getAssetProxy(bytes4 assetProxyId)
external
view
returns (address);
}

64
contracts/asset-proxy/contracts/src/interfaces/IAuthorizable.sol
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@@ -1,64 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
import "@0x/contracts-utils/contracts/src/interfaces/IOwnable.sol";
contract IAuthorizable is
IOwnable
{
// Event logged when a new address is authorized.
event AuthorizedAddressAdded(
address indexed target,
address indexed caller
);
// Event logged when a currently authorized address is unauthorized.
event AuthorizedAddressRemoved(
address indexed target,
address indexed caller
);
/// @dev Authorizes an address.
/// @param target Address to authorize.
function addAuthorizedAddress(address target)
external;
/// @dev Removes authorizion of an address.
/// @param target Address to remove authorization from.
function removeAuthorizedAddress(address target)
external;
/// @dev Removes authorizion of an address.
/// @param target Address to remove authorization from.
/// @param index Index of target in authorities array.
function removeAuthorizedAddressAtIndex(
address target,
uint256 index
)
external;
/// @dev Gets all authorized addresses.
/// @return Array of authorized addresses.
function getAuthorizedAddresses()
external
view
returns (address[] memory);
}

39
contracts/asset-proxy/contracts/src/interfaces/IBalancerPool.sol
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@@ -1,39 +0,0 @@
/*
Copyright 2020 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
interface IBalancerPool {
/// @dev Sell `tokenAmountIn` of `tokenIn` and receive `tokenOut`.
/// @param tokenIn The token being sold
/// @param tokenAmountIn The amount of `tokenIn` to sell.
/// @param tokenOut The token being bought.
/// @param minAmountOut The minimum amount of `tokenOut` to buy.
/// @param maxPrice The maximum value for `spotPriceAfter`.
/// @return tokenAmountOut The amount of `tokenOut` bought.
/// @return spotPriceAfter The new marginal spot price of the given
/// token pair for this pool.
function swapExactAmountIn(
address tokenIn,
uint tokenAmountIn,
address tokenOut,
uint minAmountOut,
uint maxPrice
) external returns (uint tokenAmountOut, uint spotPriceAfter);
}

38
contracts/asset-proxy/contracts/src/interfaces/IBancorNetwork.sol
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@@ -1,38 +0,0 @@
/*
Copyright 2020 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
contract IContractRegistry {
function addressOf(
bytes32 contractName
) external returns(address);
}
contract IBancorNetwork {
function convertByPath(
address[] calldata _path,
uint256 _amount,
uint256 _minReturn,
address _beneficiary,
address _affiliateAccount,
uint256 _affiliateFee
) external payable returns (uint256);
}

66
contracts/asset-proxy/contracts/src/interfaces/IChai.sol
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/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
import "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol";
contract PotLike {
function chi() external returns (uint256);
function rho() external returns (uint256);
function drip() external returns (uint256);
function join(uint256) external;
function exit(uint256) external;
}
// The actual Chai contract can be found here: https://github.com/dapphub/chai
contract IChai is
IERC20Token
{
/// @dev Withdraws Dai owned by `src`
/// @param src Address that owns Dai.
/// @param wad Amount of Dai to withdraw.
function draw(
address src,
uint256 wad
)
external;
/// @dev Queries Dai balance of Chai holder.
/// @param usr Address of Chai holder.
/// @return Dai balance.
function dai(address usr)
external
returns (uint256);
/// @dev Queries the Pot contract used by the Chai contract.
function pot()
external
returns (PotLike);
/// @dev Deposits Dai in exchange for Chai
/// @param dst Address to receive Chai.
/// @param wad Amount of Dai to deposit.
function join(
address dst,
uint256 wad
)
external;
}

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contracts/asset-proxy/contracts/src/interfaces/ICurve.sol
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/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
// solhint-disable func-name-mixedcase
interface ICurve {
/// @dev Sell `sellAmount` of `fromToken` token and receive `toToken` token.
/// This function exists on later versions of Curve (USDC/DAI/USDT)
/// @param i The token index being sold.
/// @param j The token index being bought.
/// @param sellAmount The amount of token being bought.
/// @param minBuyAmount The minimum buy amount of the token being bought.
function exchange_underlying(
int128 i,
int128 j,
uint256 sellAmount,
uint256 minBuyAmount
)
external;
/// @dev Get the amount of `toToken` by selling `sellAmount` of `fromToken`
/// @param i The token index being sold.
/// @param j The token index being bought.
/// @param sellAmount The amount of token being bought.
function get_dy_underlying(
int128 i,
int128 j,
uint256 sellAmount
)
external
returns (uint256 dy);
/// @dev Get the amount of `fromToken` by buying `buyAmount` of `toToken`
/// @param i The token index being sold.
/// @param j The token index being bought.
/// @param buyAmount The amount of token being bought.
function get_dx_underlying(
int128 i,
int128 j,
uint256 buyAmount
)
external
returns (uint256 dx);
/// @dev Get the underlying token address from the token index
/// @param i The token index.
function underlying_coins(
int128 i
)
external
returns (address tokenAddress);
}

192
contracts/asset-proxy/contracts/src/interfaces/IDydx.sol
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/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
pragma experimental ABIEncoderV2;
interface IDydx {
/// @dev Represents the unique key that specifies an account
struct AccountInfo {
address owner; // The address that owns the account
uint256 number; // A nonce that allows a single address to control many accounts
}
enum ActionType {
Deposit, // supply tokens
Withdraw, // borrow tokens
Transfer, // transfer balance between accounts
Buy, // buy an amount of some token (externally)
Sell, // sell an amount of some token (externally)
Trade, // trade tokens against another account
Liquidate, // liquidate an undercollateralized or expiring account
Vaporize, // use excess tokens to zero-out a completely negative account
Call // send arbitrary data to an address
}
/// @dev Arguments that are passed to Solo in an ordered list as part of a single operation.
/// Each ActionArgs has an actionType which specifies which action struct that this data will be
/// parsed into before being processed.
struct ActionArgs {
ActionType actionType;
uint256 accountIdx;
AssetAmount amount;
uint256 primaryMarketId;
uint256 secondaryMarketId;
address otherAddress;
uint256 otherAccountIdx;
bytes data;
}
enum AssetDenomination {
Wei, // the amount is denominated in wei
Par // the amount is denominated in par
}
enum AssetReference {
Delta, // the amount is given as a delta from the current value
Target // the amount is given as an exact number to end up at
}
struct AssetAmount {
bool sign; // true if positive
AssetDenomination denomination;
AssetReference ref;
uint256 value;
}
struct D256 {
uint256 value;
}
struct Value {
uint256 value;
}
struct Price {
uint256 value;
}
struct OperatorArg {
address operator;
bool trusted;
}
/// @dev The global risk parameters that govern the health and security of the system
struct RiskParams {
// Required ratio of over-collateralization
D256 marginRatio;
// Percentage penalty incurred by liquidated accounts
D256 liquidationSpread;
// Percentage of the borrower's interest fee that gets passed to the suppliers
D256 earningsRate;
// The minimum absolute borrow value of an account
// There must be sufficient incentivize to liquidate undercollateralized accounts
Value minBorrowedValue;
}
/// @dev The main entry-point to Solo that allows users and contracts to manage accounts.
/// Take one or more actions on one or more accounts. The msg.sender must be the owner or
/// operator of all accounts except for those being liquidated, vaporized, or traded with.
/// One call to operate() is considered a singular "operation". Account collateralization is
/// ensured only after the completion of the entire operation.
/// @param accounts A list of all accounts that will be used in this operation. Cannot contain
/// duplicates. In each action, the relevant account will be referred-to by its
/// index in the list.
/// @param actions An ordered list of all actions that will be taken in this operation. The
/// actions will be processed in order.
function operate(
AccountInfo[] calldata accounts,
ActionArgs[] calldata actions
)
external;
// @dev Approves/disapproves any number of operators. An operator is an external address that has the
// same permissions to manipulate an account as the owner of the account. Operators are simply
// addresses and therefore may either be externally-owned Ethereum accounts OR smart contracts.
// Operators are also able to act as AutoTrader contracts on behalf of the account owner if the
// operator is a smart contract and implements the IAutoTrader interface.
// @param args A list of OperatorArgs which have an address and a boolean. The boolean value
// denotes whether to approve (true) or revoke approval (false) for that address.
function setOperators(OperatorArg[] calldata args) external;
/// @dev Return true if a particular address is approved as an operator for an owner's accounts.
/// Approved operators can act on the accounts of the owner as if it were the operator's own.
/// @param owner The owner of the accounts
/// @param operator The possible operator
/// @return isLocalOperator True if operator is approved for owner's accounts
function getIsLocalOperator(
address owner,
address operator
)
external
view
returns (bool isLocalOperator);
/// @dev Get the ERC20 token address for a market.
/// @param marketId The market to query
/// @return tokenAddress The token address
function getMarketTokenAddress(
uint256 marketId
)
external
view
returns (address tokenAddress);
/// @dev Get all risk parameters in a single struct.
/// @return riskParams All global risk parameters
function getRiskParams()
external
view
returns (RiskParams memory riskParams);
/// @dev Get the price of the token for a market.
/// @param marketId The market to query
/// @return price The price of each atomic unit of the token
function getMarketPrice(
uint256 marketId
)
external
view
returns (Price memory price);
/// @dev Get the margin premium for a market. A margin premium makes it so that any positions that
/// include the market require a higher collateralization to avoid being liquidated.
/// @param marketId The market to query
/// @return premium The market's margin premium
function getMarketMarginPremium(uint256 marketId)
external
view
returns (D256 memory premium);
/// @dev Get the total supplied and total borrowed values of an account adjusted by the marginPremium
/// of each market. Supplied values are divided by (1 + marginPremium) for each market and
/// borrowed values are multiplied by (1 + marginPremium) for each market. Comparing these
/// adjusted values gives the margin-ratio of the account which will be compared to the global
/// margin-ratio when determining if the account can be liquidated.
/// @param account The account to query
/// @return supplyValue The supplied value of the account (adjusted for marginPremium)
/// @return borrowValue The borrowed value of the account (adjusted for marginPremium)
function getAdjustedAccountValues(
AccountInfo calldata account
)
external
view
returns (Value memory supplyValue, Value memory borrowValue);
}

42
contracts/asset-proxy/contracts/src/interfaces/IDydxBridge.sol
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/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
interface IDydxBridge {
/// @dev This is the subset of `IDydx.ActionType` that are supported by the bridge.
enum BridgeActionType {
Deposit, // Deposit tokens into dydx account.
Withdraw // Withdraw tokens from dydx account.
}
struct BridgeAction {
BridgeActionType actionType; // Action to run on dydx account.
uint256 accountIdx; // Index in `BridgeData.accountNumbers` for this action.
uint256 marketId; // Market to operate on.
uint256 conversionRateNumerator; // Optional. If set, transfer amount is scaled by (conversionRateNumerator/conversionRateDenominator).
uint256 conversionRateDenominator; // Optional. If set, transfer amount is scaled by (conversionRateNumerator/conversionRateDenominator).
}
struct BridgeData {
uint256[] accountNumbers; // Account number used to identify the owner's specific account.
BridgeAction[] actions; // Actions to carry out on the owner's accounts.
}
}

59
contracts/asset-proxy/contracts/src/interfaces/IERC20Bridge.sol
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@@ -1,59 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
contract IERC20Bridge {
/// @dev Result of a successful bridge call.
bytes4 constant internal BRIDGE_SUCCESS = 0xdc1600f3;
/// @dev Emitted when a trade occurs.
/// @param inputToken The token the bridge is converting from.
/// @param outputToken The token the bridge is converting to.
/// @param inputTokenAmount Amount of input token.
/// @param outputTokenAmount Amount of output token.
/// @param from The `from` address in `bridgeTransferFrom()`
/// @param to The `to` address in `bridgeTransferFrom()`
event ERC20BridgeTransfer(
address inputToken,
address outputToken,
uint256 inputTokenAmount,
uint256 outputTokenAmount,
address from,
address to
);
/// @dev Transfers `amount` of the ERC20 `tokenAddress` from `from` to `to`.
/// @param tokenAddress The address of the ERC20 token to transfer.
/// @param from Address to transfer asset from.
/// @param to Address to transfer asset to.
/// @param amount Amount of asset to transfer.
/// @param bridgeData Arbitrary asset data needed by the bridge contract.
/// @return success The magic bytes `0xdc1600f3` if successful.
function bridgeTransferFrom(
address tokenAddress,
address from,
address to,
uint256 amount,
bytes calldata bridgeData
)
external
returns (bytes4 success);
}

38
contracts/asset-proxy/contracts/src/interfaces/IEth2Dai.sol
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@@ -1,38 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
interface IEth2Dai {
/// @dev Sell `sellAmount` of `fromToken` token and receive `toToken` token.
/// @param fromToken The token being sold.
/// @param sellAmount The amount of `fromToken` token being sold.
/// @param toToken The token being bought.
/// @param minFillAmount Minimum amount of `toToken` token to buy.
/// @return fillAmount Amount of `toToken` bought.
function sellAllAmount(
address fromToken,
uint256 sellAmount,
address toToken,
uint256 minFillAmount
)
external
returns (uint256 fillAmount);
}

40
contracts/asset-proxy/contracts/src/interfaces/IGasToken.sol
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@@ -1,40 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.15;
import "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol";
contract IGasToken is IERC20Token {
/// @dev Frees up to `value` sub-tokens
/// @param value The amount of tokens to free
/// @return How many tokens were freed
function freeUpTo(uint256 value) external returns (uint256 freed);
/// @dev Frees up to `value` sub-tokens owned by `from`
/// @param from The owner of tokens to spend
/// @param value The amount of tokens to free
/// @return How many tokens were freed
function freeFromUpTo(address from, uint256 value) external returns (uint256 freed);
/// @dev Mints `value` amount of tokens
/// @param value The amount of tokens to mint
function mint(uint256 value) external;
}

72
contracts/asset-proxy/contracts/src/interfaces/IKyberNetworkProxy.sol
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/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
interface IKyberNetworkProxy {
/// @dev Sells `sellTokenAddress` tokens for `buyTokenAddress` tokens.
/// @param sellTokenAddress Token to sell.
/// @param sellAmount Amount of tokens to sell.
/// @param buyTokenAddress Token to buy.
/// @param recipientAddress Address to send bought tokens to.
/// @param maxBuyTokenAmount A limit on the amount of tokens to buy.
/// @param minConversionRate The minimal conversion rate. If actual rate
/// is lower, trade is canceled.
/// @param walletId The wallet ID to send part of the fees
/// @return boughtAmount Amount of tokens bought.
function trade(
address sellTokenAddress,
uint256 sellAmount,
address buyTokenAddress,
address payable recipientAddress,
uint256 maxBuyTokenAmount,
uint256 minConversionRate,
address walletId
)
external
payable
returns (uint256 boughtAmount);
/// @dev Sells `sellTokenAddress` tokens for `buyTokenAddress` tokens
/// using a hint for the reserve.
/// @param sellTokenAddress Token to sell.
/// @param sellAmount Amount of tokens to sell.
/// @param buyTokenAddress Token to buy.
/// @param recipientAddress Address to send bought tokens to.
/// @param maxBuyTokenAmount A limit on the amount of tokens to buy.
/// @param minConversionRate The minimal conversion rate. If actual rate
/// is lower, trade is canceled.
/// @param walletId The wallet ID to send part of the fees
/// @param hint The hint for the selective inclusion (or exclusion) of reserves
/// @return boughtAmount Amount of tokens bought.
function tradeWithHint(
address sellTokenAddress,
uint256 sellAmount,
address buyTokenAddress,
address payable recipientAddress,
uint256 maxBuyTokenAmount,
uint256 minConversionRate,
address payable walletId,
bytes calldata hint
)
external
payable
returns (uint256 boughtAmount);
}

32
contracts/asset-proxy/contracts/src/interfaces/IMStable.sol
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@@ -1,32 +0,0 @@
/*
Copyright 2020 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
interface IMStable {
function swap(
address _input,
address _output,
uint256 _quantity,
address _recipient
)
external
returns (uint256 output);
}

40
contracts/asset-proxy/contracts/src/interfaces/IMooniswap.sol
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@@ -1,40 +0,0 @@
/*
Copyright 2020 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
interface IMooniswapRegistry {
function pools(address token1, address token2) external view returns(address);
}
interface IMooniswap {
function swap(
address fromToken,
address destToken,
uint256 amount,
uint256 minReturn,
address referral
)
external
payable
returns(uint256 returnAmount);
}

34
contracts/asset-proxy/contracts/src/interfaces/IShell.sol
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@@ -1,34 +0,0 @@
/*
Copyright 2020 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
interface IShell {
function originSwap(
address from,
address to,
uint256 fromAmount,
uint256 minTargetAmount,
uint256 deadline
)
external
returns (uint256 toAmount);
}

70
contracts/asset-proxy/contracts/src/interfaces/IUniswapExchange.sol
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@@ -1,70 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
interface IUniswapExchange {
/// @dev Buys at least `minTokensBought` tokens with ETH and transfer them
/// to `recipient`.
/// @param minTokensBought The minimum number of tokens to buy.
/// @param deadline Time when this order expires.
/// @param recipient Who to transfer the tokens to.
/// @return tokensBought Amount of tokens bought.
function ethToTokenTransferInput(
uint256 minTokensBought,
uint256 deadline,
address recipient
)
external
payable
returns (uint256 tokensBought);
/// @dev Buys at least `minEthBought` ETH with tokens.
/// @param tokensSold Amount of tokens to sell.
/// @param minEthBought The minimum amount of ETH to buy.
/// @param deadline Time when this order expires.
/// @return ethBought Amount of tokens bought.
function tokenToEthSwapInput(
uint256 tokensSold,
uint256 minEthBought,
uint256 deadline
)
external
returns (uint256 ethBought);
/// @dev Buys at least `minTokensBought` tokens with the exchange token
/// and transfer them to `recipient`.
/// @param minTokensBought The minimum number of tokens to buy.
/// @param minEthBought The minimum amount of intermediate ETH to buy.
/// @param deadline Time when this order expires.
/// @param recipient Who to transfer the tokens to.
/// @param toTokenAddress The token being bought.
/// @return tokensBought Amount of tokens bought.
function tokenToTokenTransferInput(
uint256 tokensSold,
uint256 minTokensBought,
uint256 minEthBought,
uint256 deadline,
address recipient,
address toTokenAddress
)
external
returns (uint256 tokensBought);
}

32
contracts/asset-proxy/contracts/src/interfaces/IUniswapExchangeFactory.sol
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@@ -1,32 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
import "./IUniswapExchange.sol";
interface IUniswapExchangeFactory {
/// @dev Get the exchange for a token.
/// @param tokenAddress The address of the token contract.
function getExchange(address tokenAddress)
external
view
returns (address);
}

40
contracts/asset-proxy/contracts/src/interfaces/IUniswapV2Router01.sol
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@@ -1,40 +0,0 @@
/*
Copyright 2020 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
interface IUniswapV2Router01 {
/// @dev Swaps an exact amount of input tokens for as many output tokens as possible, along the route determined by the path.
/// The first element of path is the input token, the last is the output token, and any intermediate elements represent
/// intermediate pairs to trade through (if, for example, a direct pair does not exist).
/// @param amountIn The amount of input tokens to send.
/// @param amountOutMin The minimum amount of output tokens that must be received for the transaction not to revert.
/// @param path An array of token addresses. path.length must be >= 2. Pools for each consecutive pair of addresses must exist and have liquidity.
/// @param to Recipient of the output tokens.
/// @param deadline Unix timestamp after which the transaction will revert.
/// @return amounts The input token amount and all subsequent output token amounts.
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
}

247
contracts/asset-proxy/contracts/test/TestBancorBridge.sol
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/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
pragma experimental ABIEncoderV2;
import "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol";
import "@0x/contracts-utils/contracts/src/LibSafeMath.sol";
import "@0x/contracts-utils/contracts/src/LibAddressArray.sol";
import "../src/bridges/BancorBridge.sol";
import "../src/interfaces/IBancorNetwork.sol";
contract TestEventsRaiser {
event TokenTransfer(
address token,
address from,
address to,
uint256 amount
);
event TokenApprove(
address spender,
uint256 allowance
);
event ConvertByPathInput(
uint amountIn,
uint amountOutMin,
address toTokenAddress,
address to,
address feeRecipient,
uint256 feeAmount
);
function raiseTokenTransfer(
address from,
address to,
uint256 amount
)
external
{
emit TokenTransfer(
msg.sender,
from,
to,
amount
);
}
function raiseTokenApprove(address spender, uint256 allowance) external {
emit TokenApprove(spender, allowance);
}
function raiseConvertByPathInput(
uint amountIn,
uint amountOutMin,
address toTokenAddress,
address to,
address feeRecipient,
uint256 feeAmount
) external
{
emit ConvertByPathInput(
amountIn,
amountOutMin,
toTokenAddress,
to,
feeRecipient,
feeAmount
);
}
}
/// @dev A minimalist ERC20 token.
contract TestToken {
using LibSafeMath for uint256;
mapping (address => uint256) public balances;
string private _nextRevertReason;
/// @dev Set the balance for `owner`.
function setBalance(address owner, uint256 balance)
external
payable
{
balances[owner] = balance;
}
/// @dev Just emits a TokenTransfer event on the caller
function transfer(address to, uint256 amount)
external
returns (bool)
{
TestEventsRaiser(msg.sender).raiseTokenTransfer(msg.sender, to, amount);
return true;
}
/// @dev Just emits a TokenApprove event on the caller
function approve(address spender, uint256 allowance)
external
returns (bool)
{
TestEventsRaiser(msg.sender).raiseTokenApprove(spender, allowance);
return true;
}
function allowance(address, address) external view returns (uint256) {
return 0;
}
/// @dev Retrieve the balance for `owner`.
function balanceOf(address owner)
external
view
returns (uint256)
{
return balances[owner];
}
}
/// @dev Mock the BancorNetwork contract
contract TestBancorNetwork is
IBancorNetwork
{
string private _nextRevertReason;
/// @dev Set the revert reason for `swapExactTokensForTokens`.
function setRevertReason(string calldata reason)
external
{
_nextRevertReason = reason;
}
function convertByPath(
address[] calldata _path,
uint256 _amount,
uint256 _minReturn,
address _beneficiary,
address _affiliateAccount,
uint256 _affiliateFee
) external payable returns (uint256)
{
_revertIfReasonExists();
TestEventsRaiser(msg.sender).raiseConvertByPathInput(
// tokens sold
_amount,
// tokens bought
_minReturn,
// output token
_path[_path.length - 1],
// recipient
_beneficiary,
// fee recipient
_affiliateAccount,
// fee amount
_affiliateFee
);
}
function _revertIfReasonExists()
private
view
{
if (bytes(_nextRevertReason).length != 0) {
revert(_nextRevertReason);
}
}
}
/// @dev BancorBridge overridden to mock tokens and BancorNetwork
contract TestBancorBridge is
BancorBridge,
TestEventsRaiser
{
// Token address to TestToken instance.
mapping (address => TestToken) private _testTokens;
// TestRouter instance.
TestBancorNetwork private _testNetwork;
constructor() public {
_testNetwork = new TestBancorNetwork();
}
function setNetworkRevertReason(string calldata revertReason)
external
{
_testNetwork.setRevertReason(revertReason);
}
/// @dev Sets the balance of this contract for an existing token.
function setTokenBalance(address tokenAddress, uint256 balance)
external
{
TestToken token = _testTokens[tokenAddress];
token.setBalance(address(this), balance);
}
/// @dev Create a new token
/// @param tokenAddress The token address. If zero, one will be created.
function createToken(
address tokenAddress
)
external
returns (TestToken token)
{
token = TestToken(tokenAddress);
if (tokenAddress == address(0)) {
token = new TestToken();
}
_testTokens[address(token)] = token;
return token;
}
function getNetworkAddress()
external
view
returns (address)
{
return address(_testNetwork);
}
}

80
contracts/asset-proxy/contracts/test/TestChaiBridge.sol
View File

@@ -1,80 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
pragma experimental ABIEncoderV2;
import "../src/bridges/ChaiBridge.sol";
import "@0x/contracts-erc20/contracts/src/ERC20Token.sol";
contract TestChaiDai is
ERC20Token
{
address private constant ALWAYS_REVERT_ADDRESS = address(1);
function draw(
address from,
uint256 amount
)
external
{
if (from == ALWAYS_REVERT_ADDRESS) {
revert();
}
balances[msg.sender] += amount;
}
}
contract TestChaiBridge is
ChaiBridge
{
address public testChaiDai;
address private constant ALWAYS_REVERT_ADDRESS = address(1);
constructor()
public
{
testChaiDai = address(new TestChaiDai());
}
function _getDaiAddress()
internal
view
returns (address)
{
return testChaiDai;
}
function _getChaiAddress()
internal
view
returns (address)
{
return testChaiDai;
}
function _getERC20BridgeProxyAddress()
internal
view
returns (address)
{
return msg.sender == ALWAYS_REVERT_ADDRESS ? address(0) : msg.sender;
}
}

244
contracts/asset-proxy/contracts/test/TestDexForwarderBridge.sol
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@@ -1,244 +0,0 @@
/*
Copyright 2020 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
pragma experimental ABIEncoderV2;
import "../src/bridges/DexForwarderBridge.sol";
import "@0x/contracts-utils/contracts/src/LibSafeMath.sol";
interface ITestDexForwarderBridge {
event BridgeTransferFromCalled(
address caller,
uint256 inputTokenBalance,
address inputToken,
address outputToken,
address from,
address to,
uint256 amount
);
event TokenTransferCalled(
address from,
address to,
uint256 amount
);
function emitBridgeTransferFromCalled(
address caller,
uint256 inputTokenBalance,
address inputToken,
address outputToken,
address from,
address to,
uint256 amount
) external;
function emitTokenTransferCalled(
address from,
address to,
uint256 amount
) external;
}
interface ITestDexForwarderBridgeTestToken {
function transfer(address to, uint256 amount)
external
returns (bool);
function mint(address to, uint256 amount)
external;
function balanceOf(address owner) external view returns (uint256);
}
contract TestDexForwarderBridgeTestBridge {
bytes4 private _returnCode;
string private _revertError;
uint256 private _transferAmount;
ITestDexForwarderBridge private _testContract;
constructor(bytes4 returnCode, string memory revertError) public {
_testContract = ITestDexForwarderBridge(msg.sender);
_returnCode = returnCode;
_revertError = revertError;
}
function setTransferAmount(uint256 amount) external {
_transferAmount = amount;
}
function bridgeTransferFrom(
address outputToken,
address from,
address to,
uint256 amount,
bytes memory bridgeData
)
public
returns (bytes4 success)
{
if (bytes(_revertError).length != 0) {
revert(_revertError);
}
address inputToken = abi.decode(bridgeData, (address));
_testContract.emitBridgeTransferFromCalled(
msg.sender,
ITestDexForwarderBridgeTestToken(inputToken).balanceOf(address(this)),
inputToken,
outputToken,
from,
to,
amount
);
ITestDexForwarderBridgeTestToken(outputToken).mint(to, _transferAmount);
return _returnCode;
}
}
contract TestDexForwarderBridgeTestToken {
using LibSafeMath for uint256;
mapping(address => uint256) public balanceOf;
ITestDexForwarderBridge private _testContract;
constructor() public {
_testContract = ITestDexForwarderBridge(msg.sender);
}
function transfer(address to, uint256 amount)
external
returns (bool)
{
balanceOf[msg.sender] = balanceOf[msg.sender].safeSub(amount);
balanceOf[to] = balanceOf[to].safeAdd(amount);
_testContract.emitTokenTransferCalled(msg.sender, to, amount);
return true;
}
function mint(address owner, uint256 amount)
external
{
balanceOf[owner] = balanceOf[owner].safeAdd(amount);
}
function setBalance(address owner, uint256 amount)
external
{
balanceOf[owner] = amount;
}
}
contract TestDexForwarderBridge is
ITestDexForwarderBridge,
DexForwarderBridge
{
address private AUTHORIZED_ADDRESS; // solhint-disable-line var-name-mixedcase
function setAuthorized(address authorized)
public
{
AUTHORIZED_ADDRESS = authorized;
}
function createBridge(
bytes4 returnCode,
string memory revertError
)
public
returns (address bridge)
{
return address(new TestDexForwarderBridgeTestBridge(returnCode, revertError));
}
function createToken() public returns (address token) {
return address(new TestDexForwarderBridgeTestToken());
}
function setTokenBalance(address token, address owner, uint256 amount) public {
TestDexForwarderBridgeTestToken(token).setBalance(owner, amount);
}
function setBridgeTransferAmount(address bridge, uint256 amount) public {
TestDexForwarderBridgeTestBridge(bridge).setTransferAmount(amount);
}
function emitBridgeTransferFromCalled(
address caller,
uint256 inputTokenBalance,
address inputToken,
address outputToken,
address from,
address to,
uint256 amount
)
public
{
emit BridgeTransferFromCalled(
caller,
inputTokenBalance,
inputToken,
outputToken,
from,
to,
amount
);
}
function emitTokenTransferCalled(
address from,
address to,
uint256 amount
)
public
{
emit TokenTransferCalled(
from,
to,
amount
);
}
function balanceOf(address token, address owner) public view returns (uint256) {
return TestDexForwarderBridgeTestToken(token).balanceOf(owner);
}
function _getGstAddress()
internal
view
returns (address gst)
{
return address(0);
}
function _getERC20BridgeProxyAddress()
internal
view
returns (address erc20BridgeProxyAddress)
{
return AUTHORIZED_ADDRESS;
}
}

246
contracts/asset-proxy/contracts/test/TestDydxBridge.sol
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@@ -1,246 +0,0 @@
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.5.9;
pragma experimental ABIEncoderV2;
import "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol";
import "../src/bridges/DydxBridge.sol";
// solhint-disable no-empty-blocks
contract TestDydxBridgeToken {
uint256 private constant INIT_HOLDER_BALANCE = 10 * 10**18; // 10 tokens
mapping (address => uint256) private _balances;
/// @dev Sets initial balance of token holders.
constructor(address[] memory holders)
public
{
for (uint256 i = 0; i != holders.length; ++i) {
_balances[holders[i]] = INIT_HOLDER_BALANCE;
}
_balances[msg.sender] = INIT_HOLDER_BALANCE;
}
/// @dev Basic transferFrom implementation.
function transferFrom(address from, address to, uint256 amount)
external
returns (bool)
{
if (_balances[from] < amount || _balances[to] + amount < _balances[to]) {
return false;
}
_balances[from] -= amount;
_balances[to] += amount;
return true;
}
/// @dev Returns balance of `holder`.
function balanceOf(address holder)
external
view
returns (uint256)
{
return _balances[holder];
}
}
// solhint-disable space-after-comma
contract TestDydxBridge is
IDydx,
DydxBridge
{
address private constant ALWAYS_REVERT_ADDRESS = address(1);
address private _testTokenAddress;
bool private _shouldRevertOnOperate;
event OperateAccount(
address owner,
uint256 number
);
event OperateAction(
ActionType actionType,
uint256 accountIdx,
bool amountSign,
AssetDenomination amountDenomination,
AssetReference amountRef,
uint256 amountValue,
uint256 primaryMarketId,
uint256 secondaryMarketId,
address otherAddress,
uint256 otherAccountId,
bytes data
);
constructor(address[] memory holders)
public
{
// Deploy a test token. This represents the asset being deposited/withdrawn from dydx.
_testTokenAddress = address(new TestDydxBridgeToken(holders));
}
/// @dev Simulates `operate` in dydx contract.
/// Emits events so that arguments can be validated client-side.
function operate(
AccountInfo[] calldata accounts,
ActionArgs[] calldata actions
)
external
{
if (_shouldRevertOnOperate) {
revert("TestDydxBridge/SHOULD_REVERT_ON_OPERATE");
}
for (uint i = 0; i < accounts.length; ++i) {
emit OperateAccount(
accounts[i].owner,
accounts[i].number
);
}
for (uint i = 0; i < actions.length; ++i) {
emit OperateAction(
actions[i].actionType,
actions[i].accountIdx,
actions[i].amount.sign,
actions[i].amount.denomination,
actions[i].amount.ref,
actions[i].amount.value,
actions[i].primaryMarketId,
actions[i].secondaryMarketId,
actions[i].otherAddress,
actions[i].otherAccountIdx,
actions[i].data
);
if (actions[i].actionType == IDydx.ActionType.Withdraw) {
require(
IERC20Token(_testTokenAddress).transferFrom(
address(this),
actions[i].otherAddress,
actions[i].amount.value
),
"TestDydxBridge/WITHDRAW_FAILED"
);
} else if (actions[i].actionType == IDydx.ActionType.Deposit) {
require(