chore: [asset swapper] sampler Solidity 0.6 + Bridge addresses in AS (#4)
* Refactor excess interfaces * Compiles on 0.6 * Refactored into try/catch * Rebase and Refactored to v06 * Handle invalid registry in LP * Update packages/asset-swapper/contracts/src/LiquidityProviderSampler.sol Co-authored-by: Lawrence Forman <lawrence@0xproject.com> * chore: [asset-swapper] Move Bridge Addresses and Gas schedule * curve->pool * lint * Refactor to fix module load order * Move FEE Schedule * rollup: Swerve/Sushi/SnowSwap/DODO (#7) * rollup: Swerve/Sushi * DODO Rollup + Snowswap Swerve * hardcode addresses temporarily * rebase * rename to SUSHISWAP_ROUTER * CHANGELOGs * CHANGELOGs Co-authored-by: Lawrence Forman <lawrence@0xproject.com>
This commit is contained in:
Jacob Evans
GitHub
119
contracts/asset-proxy/contracts/src/bridges/SnowSwapBridge.sol
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119
contracts/asset-proxy/contracts/src/bridges/SnowSwapBridge.sol
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/*
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Copyright 2019 ZeroEx Intl.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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pragma solidity ^0.5.9;
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pragma experimental ABIEncoderV2;
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import "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol";
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import "@0x/contracts-erc20/contracts/src/LibERC20Token.sol";
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import "@0x/contracts-exchange-libs/contracts/src/IWallet.sol";
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import "@0x/contracts-utils/contracts/src/DeploymentConstants.sol";
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import "../interfaces/IERC20Bridge.sol";
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import "../interfaces/ICurve.sol";
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// solhint-disable not-rely-on-time
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// solhint-disable space-after-comma
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contract SnowSwapBridge is
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IERC20Bridge,
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IWallet,
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DeploymentConstants
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{
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struct SnowSwapBridgeData {
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address curveAddress;
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bytes4 exchangeFunctionSelector;
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address fromTokenAddress;
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int128 fromCoinIdx;
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int128 toCoinIdx;
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}
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/// @dev Callback for `ICurve`. Tries to buy `amount` of
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/// `toTokenAddress` tokens by selling the entirety of the opposing asset
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/// (DAI, USDC) to the Curve contract, then transfers the bought
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/// tokens to `to`.
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/// @param toTokenAddress The token to give to `to` (i.e DAI, USDC, USDT).
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/// @param from The maker (this contract).
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/// @param to The recipient of the bought tokens.
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/// @param amount Minimum amount of `toTokenAddress` tokens to buy.
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/// @param bridgeData The abi-encoeded "from" token address.
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/// @return success The magic bytes if successful.
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function bridgeTransferFrom(
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address toTokenAddress,
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address from,
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address to,
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uint256 amount,
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bytes calldata bridgeData
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)
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external
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returns (bytes4 success)
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{
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// Decode the bridge data to get the SnowSwap metadata.
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SnowSwapBridgeData memory data = abi.decode(bridgeData, (SnowSwapBridgeData));
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require(toTokenAddress != data.fromTokenAddress, "SnowSwapBridge/INVALID_PAIR");
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uint256 fromTokenBalance = IERC20Token(data.fromTokenAddress).balanceOf(address(this));
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// Grant an allowance to the exchange to spend `fromTokenAddress` token.
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LibERC20Token.approveIfBelow(data.fromTokenAddress, data.curveAddress, fromTokenBalance);
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// Try to sell all of this contract's `fromTokenAddress` token balance.
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{
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(bool didSucceed, bytes memory resultData) =
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data.curveAddress.call(abi.encodeWithSelector(
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data.exchangeFunctionSelector,
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data.fromCoinIdx,
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data.toCoinIdx,
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// dx
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fromTokenBalance,
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// min dy
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amount
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));
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if (!didSucceed) {
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assembly { revert(add(resultData, 32), mload(resultData)) }
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}
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}
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uint256 toTokenBalance = IERC20Token(toTokenAddress).balanceOf(address(this));
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// Transfer the converted `toToken`s to `to`.
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LibERC20Token.transfer(toTokenAddress, to, toTokenBalance);
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emit ERC20BridgeTransfer(
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data.fromTokenAddress,
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toTokenAddress,
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fromTokenBalance,
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toTokenBalance,
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from,
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to
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);
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return BRIDGE_SUCCESS;
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}
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/// @dev `SignatureType.Wallet` callback, so that this bridge can be the maker
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/// and sign for itself in orders. Always succeeds.
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/// @return magicValue Magic success bytes, always.
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function isValidSignature(
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bytes32,
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bytes calldata
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)
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external
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view
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returns (bytes4 magicValue)
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{
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return LEGACY_WALLET_MAGIC_VALUE;
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}
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}
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119
contracts/asset-proxy/contracts/src/bridges/SwerveBridge.sol
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119
contracts/asset-proxy/contracts/src/bridges/SwerveBridge.sol
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/*
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Copyright 2019 ZeroEx Intl.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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pragma solidity ^0.5.9;
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pragma experimental ABIEncoderV2;
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import "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol";
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import "@0x/contracts-erc20/contracts/src/LibERC20Token.sol";
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import "@0x/contracts-exchange-libs/contracts/src/IWallet.sol";
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import "@0x/contracts-utils/contracts/src/DeploymentConstants.sol";
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import "../interfaces/IERC20Bridge.sol";
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import "../interfaces/ICurve.sol";
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// solhint-disable not-rely-on-time
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// solhint-disable space-after-comma
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contract SwerveBridge is
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IERC20Bridge,
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IWallet,
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DeploymentConstants
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{
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struct SwerveBridgeData {
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address curveAddress;
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bytes4 exchangeFunctionSelector;
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address fromTokenAddress;
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int128 fromCoinIdx;
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int128 toCoinIdx;
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}
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/// @dev Callback for `ICurve`. Tries to buy `amount` of
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/// `toTokenAddress` tokens by selling the entirety of the opposing asset
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/// (DAI, USDC) to the Curve contract, then transfers the bought
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/// tokens to `to`.
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/// @param toTokenAddress The token to give to `to` (i.e DAI, USDC, USDT).
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/// @param from The maker (this contract).
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/// @param to The recipient of the bought tokens.
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/// @param amount Minimum amount of `toTokenAddress` tokens to buy.
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/// @param bridgeData The abi-encoeded "from" token address.
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/// @return success The magic bytes if successful.
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function bridgeTransferFrom(
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address toTokenAddress,
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address from,
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address to,
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uint256 amount,
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bytes calldata bridgeData
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)
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external
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returns (bytes4 success)
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{
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// Decode the bridge data to get the SwerveBridgeData metadata.
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SwerveBridgeData memory data = abi.decode(bridgeData, (SwerveBridgeData));
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require(toTokenAddress != data.fromTokenAddress, "SwerveBridge/INVALID_PAIR");
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uint256 fromTokenBalance = IERC20Token(data.fromTokenAddress).balanceOf(address(this));
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// Grant an allowance to the exchange to spend `fromTokenAddress` token.
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LibERC20Token.approveIfBelow(data.fromTokenAddress, data.curveAddress, fromTokenBalance);
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// Try to sell all of this contract's `fromTokenAddress` token balance.
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{
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(bool didSucceed, bytes memory resultData) =
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data.curveAddress.call(abi.encodeWithSelector(
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data.exchangeFunctionSelector,
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data.fromCoinIdx,
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data.toCoinIdx,
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// dx
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fromTokenBalance,
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// min dy
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amount
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));
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if (!didSucceed) {
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assembly { revert(add(resultData, 32), mload(resultData)) }
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}
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}
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uint256 toTokenBalance = IERC20Token(toTokenAddress).balanceOf(address(this));
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// Transfer the converted `toToken`s to `to`.
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LibERC20Token.transfer(toTokenAddress, to, toTokenBalance);
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emit ERC20BridgeTransfer(
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data.fromTokenAddress,
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toTokenAddress,
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fromTokenBalance,
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toTokenBalance,
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from,
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to
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);
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return BRIDGE_SUCCESS;
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}
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/// @dev `SignatureType.Wallet` callback, so that this bridge can be the maker
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/// and sign for itself in orders. Always succeeds.
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/// @return magicValue Magic success bytes, always.
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function isValidSignature(
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bytes32,
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bytes calldata
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)
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external
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view
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returns (bytes4 magicValue)
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{
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return LEGACY_WALLET_MAGIC_VALUE;
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}
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}
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