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Revert "Add uniswap v2 path finder algo"

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This reverts commit 191b0d0931.
This commit is contained in:
Mubaris NK 2020-11-16 17:18:00 +05:30
parent 3f72634daa
commit b97a1ade1d
1 changed files with 0 additions and 178 deletions
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178
contracts/protocols/uniswapV2.sol
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@ -85,22 +85,6 @@ contract UniswapHelpers is Helpers {
_sell = sell == getEthAddr() ? TokenInterface(getAddressWETH()) : TokenInterface(sell);
}
function checkPaths(
IUniswapV2Router02 router,
address[] memory paths
) internal view returns(bool isValid) {
isValid = true;
for (uint i; i < paths.length - 1; i++) {
if (paths[i] == paths[i + 1]) {
return false;
}
address pair = IUniswapV2Factory(router.factory()).getPair(paths[i], paths[i + 1]);
if (pair == address(0)) {
return false;
}
}
}
function getExpectedBuyAmt(
address buyAddr,
address sellAddr,
@ -189,40 +173,6 @@ contract UniswapHelpers is Helpers {
amtA = wmul(_tokenA.balanceOf(exchangeAddr), share);
amtB = wmul(_tokenB.balanceOf(exchangeAddr), share);
}
function _getExpectedBuyAmtByPath(
address[] memory paths,
uint sellAmt
) internal view returns(uint buyAmt) {
IUniswapV2Router02 router = IUniswapV2Router02(getUniswapAddr());
if (checkPaths(router, paths)) {
uint[] memory amts = router.getAmountsOut(
sellAmt,
paths
);
buyAmt = amts[amts.length - 1];
} else {
buyAmt = 0;
}
}
function _getExpectedSellAmtByPath(
address[] memory paths,
uint buyAmt
) internal view returns(uint sellAmt) {
IUniswapV2Router02 router = IUniswapV2Router02(getUniswapAddr());
if (checkPaths(router, paths)) {
uint[] memory amts = router.getAmountsIn(
buyAmt,
paths
);
sellAmt = amts[0];
} else {
sellAmt = uint(-1);
}
}
}
@ -343,134 +293,6 @@ contract Resolver is UniswapHelpers {
}
return poolData;
}
function getOptimalSellPath(
address buyAddr,
address sellAddr,
address[] memory tokens,
uint sellAmt,
uint slippage
) public view returns (address[] memory paths, uint buyAmt, uint unitAmt)
{
(TokenInterface _buyAddr, TokenInterface _sellAddr) = changeEthAddress(buyAddr, sellAddr);
address[] memory _path = new address[](2);
_path[0] = address(_sellAddr);
_path[1] = address(_buyAddr);
paths = _path;
buyAmt = _getExpectedBuyAmtByPath(_path, sellAmt);
_path = new address[](3);
_path[0] = address(_sellAddr);
_path[2] = address(_buyAddr);
uint i;
uint j;
uint _buyAmt;
for(i = 0; i < tokens.length; i++) {
_path[1] = tokens[i];
_buyAmt = _getExpectedBuyAmtByPath(_path, sellAmt);
if (_buyAmt > buyAmt) {
buyAmt = _buyAmt;
paths = new address[](3);
paths[0] = _path[0];
paths[1] = _path[1];
paths[2] = _path[2];
}
}
_path = new address[](4);
_path[0] = address(_sellAddr);
_path[3] = address(_buyAddr);
for(i = 0; i < tokens.length; i++) {
for(j = 0; j < tokens.length; j++) {
_path[1] = tokens[i];
_path[2] = tokens[j];
_buyAmt = _getExpectedBuyAmtByPath(_path, sellAmt);
if (_buyAmt > buyAmt) {
buyAmt = _buyAmt;
paths = new address[](4);
paths[0] = _path[0];
paths[1] = _path[1];
paths[2] = _path[2];
paths[3] = _path[3];
}
}
}
unitAmt = getBuyUnitAmt(_buyAddr, buyAmt, _sellAddr, sellAmt, slippage);
}
function getOptimalBuyPath(
address buyAddr,
address sellAddr,
address[] memory tokens,
uint buyAmt,
uint slippage
) public view returns (address[] memory paths, uint sellAmt, uint unitAmt)
{
(TokenInterface _buyAddr, TokenInterface _sellAddr) = changeEthAddress(buyAddr, sellAddr);
address[] memory _path = new address[](2);
_path[0] = address(_sellAddr);
_path[1] = address(_buyAddr);
paths = _path;
sellAmt = _getExpectedSellAmtByPath(_path, buyAmt);
_path = new address[](3);
_path[0] = address(_sellAddr);
_path[2] = address(_buyAddr);
uint i;
uint j;
uint _sellAmt;
for(i = 0; i < tokens.length; i++) {
_path[1] = tokens[i];
_sellAmt = _getExpectedSellAmtByPath(_path, buyAmt);
if (_sellAmt < sellAmt) {
sellAmt = _sellAmt;
paths = new address[](3);
paths[0] = _path[0];
paths[1] = _path[1];
paths[2] = _path[2];
}
}
_path = new address[](4);
_path[0] = address(_sellAddr);
_path[3] = address(_buyAddr);
for(i = 0; i < tokens.length; i++) {
for(j = 0; j < tokens.length; j++) {
_path[1] = tokens[i];
_path[2] = tokens[j];
_sellAmt = _getExpectedSellAmtByPath(_path, buyAmt);
if (_sellAmt < sellAmt) {
sellAmt = _sellAmt;
paths = new address[](4);
paths[0] = _path[0];
paths[1] = _path[1];
paths[2] = _path[2];
paths[3] = _path[3];
}
}
}
unitAmt = getSellUnitAmt(_sellAddr, sellAmt, _buyAddr, buyAmt, slippage);
}
}