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feat: Support ETH based Curve pools (#220)

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* feat: Support ETH based Curve pools

* Disable Curve VIP for WETH trades

* feat: Support for sETH and ankrETH (Curve)

* Disable SnowSwap ETH pools

* feat: add BUSD Curve 3pool

* fix changelog

Co-authored-by: Romain Butteaud <romain.butteaud@gmail.com>
This commit is contained in:
Jacob Evans
2021-05-05 07:33:41 +10:00
committed by GitHub
parent c68b5d7844
commit c00ce9daac
8 changed files with 125 additions and 36 deletions
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9
contracts/zero-ex/CHANGELOG.json
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@@ -1,4 +1,13 @@
[
{
"version": "0.23.0",
"changes": [
{
"note": "Added ETH support to `MixinCurve`",
"pr": 220
}
]
},
{
"timestamp": 1619830995,
"version": "0.22.3",

2
contracts/zero-ex/contracts/src/transformers/bridges/BridgeAdapter.sol
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@@ -65,7 +65,7 @@ contract BridgeAdapter is
MixinBalancer()
MixinBancor(weth)
MixinCoFiX()
MixinCurve()
MixinCurve(weth)
MixinCryptoCom()
MixinDodo()
MixinDodoV2()

27
contracts/zero-ex/contracts/src/transformers/bridges/mixins/MixinCurve.sol
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@@ -21,6 +21,7 @@ pragma solidity ^0.6.5;
pragma experimental ABIEncoderV2;
import "@0x/contracts-utils/contracts/src/v06/errors/LibRichErrorsV06.sol";
import "@0x/contracts-erc20/contracts/src/v06/IEtherTokenV06.sol";
import "@0x/contracts-erc20/contracts/src/v06/LibERC20TokenV06.sol";
import "@0x/contracts-erc20/contracts/src/v06/IERC20TokenV06.sol";
import "@0x/contracts-utils/contracts/src/v06/LibSafeMathV06.sol";
@@ -31,6 +32,15 @@ contract MixinCurve {
using LibSafeMathV06 for uint256;
using LibRichErrorsV06 for bytes;
/// @dev Mainnet address of the WETH contract.
IEtherTokenV06 private immutable WETH;
constructor(IEtherTokenV06 weth)
public
{
WETH = weth;
}
struct CurveBridgeData {
address curveAddress;
@@ -50,10 +60,17 @@ contract MixinCurve {
{
// Decode the bridge data to get the Curve metadata.
CurveBridgeData memory data = abi.decode(bridgeData, (CurveBridgeData));
sellToken.approveIfBelow(data.curveAddress, sellAmount);
uint256 payableAmount;
if (sellToken == WETH) {
payableAmount = sellAmount;
WETH.withdraw(sellAmount);
} else {
sellToken.approveIfBelow(data.curveAddress, sellAmount);
}
uint256 beforeBalance = buyToken.balanceOf(address(this));
(bool success, bytes memory resultData) =
data.curveAddress.call(abi.encodeWithSelector(
data.curveAddress.call{value: payableAmount}(abi.encodeWithSelector(
data.exchangeFunctionSelector,
data.fromCoinIdx,
data.toCoinIdx,
@@ -65,6 +82,12 @@ contract MixinCurve {
if (!success) {
resultData.rrevert();
}
if (buyToken == WETH) {
boughtAmount = address(this).balance;
WETH.deposit{ value: boughtAmount }();
}
return buyToken.balanceOf(address(this)).safeSub(beforeBalance);
}
}