feat: mStable + FQT Rollup (#2662)

* feat: mStable * deploy and CHANGELOG * `@0x/contracts-utils`: Add more testnet addresses. * `@0x/contract-addresses`: Deply Mstable on testnets * `@0x/contract-addresses`: Remove testnet deployments of mStable :-) * move `erc20-bridge-sampler` into `asset-swapper` remove `DevUtils` dependency from sampler contract. * `@0x/asset-swapper`: Add ERC20BridgeSampler support for validating orders in maker fees denominated in non-maker assets. `@0x/asset-swapper`: Add tests for `NativeOrderSampler`. * `@0x/asset-swapper`: Return `0` sample if native order asset data is unsupported. * `@0x/asset-swapper`: Fix failing test. * feat: ExchangeProxy FQT fruit rollup (#2645) * feat: Optimize Bridges in ExchangeProxy * compile and most work * work around to trust the delecall contract * force allowances * Update Kyber/Eth2Dai bridges * Remove memory state where not required * cleanup * Combine Bridges into one adapter * mixins * refactor out ZeroExBridge * move out interface * comment out hacks * update migrations * remove simbot hacks * AdapterAddresses and mStable * Share constructor arg * fix migration * Remove whitespace * `@0x/contracts-zero-ex`: BridgeAdapter -- revert if bridge address is 0. * `@0x/contract-addresses`: Deploy FQT. Co-authored-by: Lawrence Forman <me@merklejerk.com> Co-authored-by: Lawrence Forman <lawrence@0xproject.com> * update ganache contract addresses * fix: asset-swapper empty batch call (#2669) * update ganache contract addresses * fix: asset-swapper prevent empty sampler batch call * add sampler to migrations * change migrations version * Use contract-wrappers and artifacts * remove extra data * remove deps, set sampler to NULL_ADDRESS * all the exports * noop sell rate too * update ganache contract addresses Co-authored-by: Lawrence Forman <me@merklejerk.com> Co-authored-by: Lawrence Forman <lawrence@0xproject.com>
2020-08-20 08:18:44 +10:00
parent 458a014e6d
commit 7e8b56eef4
113 changed files with 2891 additions and 5319 deletions
--- a/packages/asset-swapper/contracts/src/MultiBridgeSampler.sol
+++ b/packages/asset-swapper/contracts/src/MultiBridgeSampler.sol
@@ -0,0 +1,79 @@
+/*
+
+  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 "./IMultiBridge.sol";
+
+
+contract MultiBridgeSampler {
+
+    /// @dev Default gas limit for multibridge calls.
+    uint256 constant private DEFAULT_CALL_GAS = 400e3; // 400k
+
+    /// @dev Sample sell quotes from MultiBridge.
+    /// @param multibridge Address of the MultiBridge contract.
+    /// @param takerToken Address of the taker token (what to sell).
+    /// @param intermediateToken The address of the intermediate token to
+    ///        use in an indirect route.
+    /// @param makerToken Address of the maker token (what to buy).
+    /// @param takerTokenAmounts Taker token sell amount for each sample.
+    /// @return makerTokenAmounts Maker amounts bought at each taker token
+    ///         amount.
+    function sampleSellsFromMultiBridge(
+        address multibridge,
+        address takerToken,
+        address intermediateToken,
+        address makerToken,
+        uint256[] memory takerTokenAmounts
+    )
+        public
+        view
+        returns (uint256[] memory makerTokenAmounts)
+    {
+        // Initialize array of maker token amounts.
+        uint256 numSamples = takerTokenAmounts.length;
+        makerTokenAmounts = new uint256[](numSamples);
+
+        // If no address provided, return all zeros.
+        if (multibridge == address(0)) {
+            return makerTokenAmounts;
+        }
+
+        for (uint256 i = 0; i < numSamples; i++) {
+            (bool didSucceed, bytes memory resultData) =
+                multibridge.staticcall.gas(DEFAULT_CALL_GAS)(
+                    abi.encodeWithSelector(
+                        IMultiBridge(0).getSellQuote.selector,
+                        takerToken,
+                        intermediateToken,
+                        makerToken,
+                        takerTokenAmounts[i]
+                    ));
+            uint256 buyAmount = 0;
+            if (didSucceed) {
+                buyAmount = abi.decode(resultData, (uint256));
+            } else {
+                // Exit early if the amount is too high for the liquidity provider to serve
+                break;
+            }
+            makerTokenAmounts[i] = buyAmount;
+        }
+    }
+}