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added Uniswap & Oasis for MKR swap

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This commit is contained in:
Samyak Jain 2019-11-18 02:17:37 +05:30
parent f5baa10836
commit a96a82907b
1 changed files with 83 additions and 14 deletions
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97
contracts/ProxyLogics/MCD/InstaMcdMigrate.sol
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@ -244,6 +244,20 @@ contract Helpers is DSMath {
addr = 0xc679857761beE860f5Ec4B3368dFE9752580B096;
}
/**
* @dev get uniswap MKR exchange
*/
function getUniswapMKRExchange() public pure returns (address ume) {
ume = 0x2C4Bd064b998838076fa341A83d007FC2FA50957;
}
/**
* @dev get uniswap MKR exchange
*/
function getUniFactoryAddr() public pure returns (address ufa) {
ufa = 0xc0a47dFe034B400B47bDaD5FecDa2621de6c4d95;
}
/**
* @dev setting allowance if required
*/
@ -284,25 +298,80 @@ contract LiquidityResolver is Helpers {
contract MKRSwapper is LiquidityResolver {
function swapToMkrOtc(address tokenAddr, uint govFee) internal {
function getBestMkrSwap(address srcTknAddr, uint destMkrAmt) public view returns(uint bestEx, uint srcAmt) {
uint oasisPrice = getOasisSwap(srcTknAddr, destMkrAmt);
uint uniswapPrice = getUniswapSwap(srcTknAddr, destMkrAmt);
srcAmt = oasisPrice < uniswapPrice ? oasisPrice : uniswapPrice;
bestEx = oasisPrice < uniswapPrice ? 0 : 1; // if 0 then use Oasis for Swap, if 1 then use Uniswap
}
function getOasisSwap(address tokenAddr, uint destMkrAmt) internal view returns(uint srcAmt) {
TokenInterface mkr = TubInterface(getSaiTubAddress()).gov();
uint payAmt = OtcInterface(getOtcAddress()).getPayAmount(tokenAddr, address(mkr), govFee);
if (tokenAddr == getETHAddress()) {
address srcTknAddr = tokenAddr == getETHAddress() ? getWETHAddress() : tokenAddr;
srcAmt = OtcInterface(getOtcAddress()).getPayAmount(srcTknAddr, address(mkr), destMkrAmt);
}
function getUniswapSwap(address srcTknAddr, uint destMkrAmt) internal view returns(uint srcAmt) {
UniswapExchange mkrEx = UniswapExchange(getUniswapMKRExchange());
if (srcTknAddr == getETHAddress()) {
srcAmt = mkrEx.getEthToTokenOutputPrice(destMkrAmt);
} else {
address buyTknExAddr = UniswapFactoryInterface(getUniFactoryAddr()).getExchange(srcTknAddr);
UniswapExchange buyTknEx = UniswapExchange(buyTknExAddr);
srcAmt = buyTknEx.getTokenToEthOutputPrice(mkrEx.getEthToTokenOutputPrice(destMkrAmt)); //Check thrilok is this correct
}
}
function swapToMkr(address tokenAddr, uint govFee) internal {
(uint bestEx, uint srcAmt) = getBestMkrSwap(tokenAddr, govFee);
if (bestEx == 0) {
swapToMkrOtc(tokenAddr, srcAmt, govFee);
} else {
swapToMkrUniswap(tokenAddr, srcAmt, govFee);
}
}
function swapToMkrOtc(address tokenAddr, uint srcAmt, uint govFee) internal {
address mkr = InstaMcdAddress(getMcdAddresses()).gov();
address srcTknAddr = tokenAddr == getETHAddress() ? getWETHAddress() : tokenAddr;
if (srcTknAddr == getWETHAddress()) {
TokenInterface weth = TokenInterface(getWETHAddress());
weth.deposit.value(payAmt)();
} else if (tokenAddr != getSaiAddress() && tokenAddr != getDaiAddress()) {
require(TokenInterface(tokenAddr).transferFrom(msg.sender, address(this), payAmt), "Tranfer-failed");
weth.deposit.value(srcAmt)();
} else if (srcTknAddr != getSaiAddress() && srcTknAddr != getDaiAddress()) {
require(TokenInterface(srcTknAddr).transferFrom(msg.sender, address(this), srcAmt), "Tranfer-failed");
}
setApproval(tokenAddr, payAmt, getOtcAddress());
setApproval(srcTknAddr, srcAmt, getOtcAddress());
OtcInterface(getOtcAddress()).buyAllAmount(
address(mkr),
mkr,
govFee,
tokenAddr,
payAmt
srcTknAddr,
srcAmt
);
}
function swapToMkrUniswap(address tokenAddr, uint srcAmt, uint govFee) internal {
UniswapExchange mkrEx = UniswapExchange(getUniswapMKRExchange());
address mkr = InstaMcdAddress(getMcdAddresses()).gov();
if (tokenAddr == getETHAddress()) {
mkrEx.ethToTokenSwapOutput.value(srcAmt)(govFee, uint(1899063809));
} else {
address buyTknExAddr = UniswapFactoryInterface(getUniFactoryAddr()).getExchange(tokenAddr);
UniswapExchange buyTknEx = UniswapExchange(buyTknExAddr);
require(TokenInterface(tokenAddr).transferFrom(msg.sender, address(this), srcAmt), "not-approved-yet");
setApproval(tokenAddr, srcAmt, buyTknExAddr);
buyTknEx.tokenToTokenSwapOutput(
govFee,
srcAmt,
uint(999000000000000000000),
uint(1899063809), // 6th March 2030 GMT // no logic
mkr
);
}
}
}
@ -312,7 +381,7 @@ contract SCDResolver is MKRSwapper {
TubInterface tub = TubInterface(getSaiTubAddress());
(bytes32 val, bool ok) = tub.pep().peek();
TokenInterface mkr = TubInterface(getSaiTubAddress()).gov();
address mkr = InstaMcdAddress(getMcdAddresses()).gov();
feeAmt = 0;
if (ok && val != 0) {
// MKR required for wipe = Stability fees accrued in Dai / MKRUSD value
@ -320,7 +389,7 @@ contract SCDResolver is MKRSwapper {
mkrFee = rmul(_wad, mkrFee);
mkrFee = wdiv(mkrFee, uint(val));
// convert mkr amount into sai amount
feeAmt = OtcInterface(getOtcAddress()).getPayAmount(getSaiAddress(), address(mkr), mkrFee);
feeAmt = OtcInterface(getOtcAddress()).getPayAmount(getSaiAddress(), mkr, mkrFee);
}
}
@ -344,7 +413,7 @@ contract SCDResolver is MKRSwapper {
uint mkrFee = getFeeOfCdp(cup, _wad);
if (payFeeWith != address(mkr) && mkrFee > 0) {
swapToMkrOtc(payFeeWith, mkrFee); //otc
swapToMkr(payFeeWith, mkrFee); //otc
} else if (payFeeWith == address(mkr) && mkrFee > 0) {
require(TokenInterface(address(mkr)).transferFrom(msg.sender, address(this), mkrFee), "Tranfer-failed");
}
@ -405,7 +474,7 @@ contract MCDResolver is SCDResolver {
uint govFee = wdiv(tub.rap(cup), uint(val));
if (govFee > 0) {
if (payGem != address(0)) {
swapToMkrOtc(payGem, govFee);
swapToMkr(payGem, govFee);
require(tub.gov().transfer(address(scdMcdMigration), govFee), "transfer-failed");
} else {
require(tub.gov().transferFrom(msg.sender, address(scdMcdMigration), govFee), "transfer-failed"); // Check Thrilok - is it working => We can directly transfer MKR to address(scdMcdMigration). Right?