Liquidity.Party/tycho-protocol-sdk
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feat: Implemented swap()

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domenicodev
2024-01-23 18:43:57 +01:00
parent 7c1e102f73
commit a4693f5300
1 changed files with 61 additions and 1 deletions
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62
evm/src/angle/AngleAdapter.sol
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@@ -30,6 +30,7 @@ contract AngleAdapter is ISwapAdapter {
}
}
/// @inheritdoc ISwapAdapter
function swap(
bytes32 poolId,
IERC20 sellToken,
@@ -37,13 +38,28 @@ contract AngleAdapter is ISwapAdapter {
OrderSide side,
uint256 specifiedAmount
) external returns (Trade memory trade) {
revert NotImplemented("TemplateSwapAdapter.swap");
if (specifiedAmount == 0) {
return trade;
}
uint256 gasBefore = gasleft();
if (side == OrderSide.Sell) {
trade.calculatedAmount =
sell(sellToken, buyToken, specifiedAmount);
trade.price = getPriceAt(specifiedAmount, address(sellToken), address(buyToken));
} else {
trade.calculatedAmount =
buy(sellToken, buyToken, specifiedAmount);
trade.price = getPriceAt(specifiedAmount, address(buyToken), address(sellToken));
}
trade.gasUsed = gasBefore - gasleft();
}
/// @inheritdoc ISwapAdapter
/// @dev mint may have no limits, but we underestimate them to make sure, with the same amount of sellToken.
/// We use the quoteIn (incl. fee), because calculating fee requires a part of the implementation of
/// the Angle Diamond Storage, and therefore redundant functions and excessive contract size, with an high complexity.
/// In addition, we underestimate to * 0.9 to ensure swaps with OrderSide.Buy won't fail anyway.
function getLimits(bytes32, IERC20 sellToken, IERC20 buyToken)
external
view
@@ -63,6 +79,7 @@ contract AngleAdapter is ISwapAdapter {
else {
limits[0] = sellToken.balanceOf(transmuterAddress);
}
limits[0] = limits[0] * 90 / 100;
limits[1] = transmuter.quoteIn(limits[0], sellTokenAddress, buyTokenAddress);
}
else { // burn(sell agToken)
@@ -74,6 +91,7 @@ contract AngleAdapter is ISwapAdapter {
else {
collatLimit = buyToken.balanceOf(transmuterAddress);
}
collatLimit = collatLimit * 90 / 100;
limits[0] = transmuter.quoteIn(collatLimit, buyTokenAddress, sellTokenAddress);
limits[1] = collatLimit;
}
@@ -128,6 +146,48 @@ contract AngleAdapter is ISwapAdapter {
amountIn
);
}
/// @notice Executes a sell order on the contract.
/// @param sellToken The token being sold.
/// @param buyToken The token being bought.
/// @param amount The amount to be traded.
/// @return calculatedAmount The amount of tokens received.
function sell(
IERC20 sellToken,
IERC20 buyToken,
uint256 amount
) internal returns (uint256 calculatedAmount) {
address sellTokenAddress = address(sellToken);
address buyTokenAddress = address(buyToken);
uint256 amountOut = transmuter.quoteIn(amount, sellTokenAddress, buyTokenAddress);
// TODO: use safeTransferFrom
sellToken.transferFrom(msg.sender, address(this), amount);
sellToken.approve(address(transmuter), amount);
transmuter.swapExactInput(amount, 0, sellTokenAddress, buyTokenAddress, msg.sender, 0);
return amountOut;
}
/// @notice Executes a buy order on the contract.
/// @param sellToken The token being sold.
/// @param buyToken The token being bought.
/// @param amountOut The amount of buyToken to receive.
/// @return calculatedAmount The amount of tokens received.
function buy(
IERC20 sellToken,
IERC20 buyToken,
uint256 amountOut
) internal returns (uint256 calculatedAmount) {
address sellTokenAddress = address(sellToken);
address buyTokenAddress = address(buyToken);
uint256 amountIn = transmuter.quoteOut(amountOut, sellTokenAddress, buyTokenAddress);
// TODO: use safeTransferFrom
sellToken.transferFrom(msg.sender, address(this), amountIn);
sellToken.approve(address(transmuter), amountIn);
transmuter.swapExactOutput(amountOut, type(uint256).max, sellTokenAddress, buyTokenAddress, msg.sender, 0);
return amountIn;
}
}
abstract contract ITransmuter {