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| // SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity ^0.8.0;
import "../BaseLogic.sol";
import "../vendor/ISwapRouter.sol";
/// @notice Trading assets on Uniswap V3 and 1Inch V4 DEXs
contract Swap is BaseLogic {
address immutable public uniswapRouter;
address immutable public oneInch;
/// @notice Params for Uniswap V3 exact input trade on a single pool
/// @param subAccountIdIn subaccount id to trade from
/// @param subAccountIdOut subaccount id to trade to
/// @param underlyingIn sold token address
/// @param underlyingOut bought token address
/// @param amountIn amount of token to sell
/// @param amountOutMinimum minimum amount of bought token
/// @param deadline trade must complete before this timestamp
/// @param fee uniswap pool fee to use
/// @param sqrtPriceLimitX96 maximum acceptable price
struct SwapUniExactInputSingleParams {
uint subAccountIdIn;
uint subAccountIdOut;
address underlyingIn;
address underlyingOut;
uint amountIn;
uint amountOutMinimum;
uint deadline;
uint24 fee;
uint160 sqrtPriceLimitX96;
}
/// @notice Params for Uniswap V3 exact input trade routed through multiple pools
/// @param subAccountIdIn subaccount id to trade from
/// @param subAccountIdOut subaccount id to trade to
/// @param underlyingIn sold token address
/// @param underlyingOut bought token address
/// @param amountIn amount of token to sell
/// @param amountOutMinimum minimum amount of bought token
/// @param deadline trade must complete before this timestamp
/// @param path list of pools to use for the trade
struct SwapUniExactInputParams {
uint subAccountIdIn;
uint subAccountIdOut;
uint amountIn;
uint amountOutMinimum;
uint deadline;
bytes path; // list of pools to hop - constructed with uni SDK
}
/// @notice Params for Uniswap V3 exact output trade on a single pool
/// @param subAccountIdIn subaccount id to trade from
/// @param subAccountIdOut subaccount id to trade to
/// @param underlyingIn sold token address
/// @param underlyingOut bought token address
/// @param amountOut amount of token to buy
/// @param amountInMaximum maximum amount of sold token
/// @param deadline trade must complete before this timestamp
/// @param fee uniswap pool fee to use
/// @param sqrtPriceLimitX96 maximum acceptable price
struct SwapUniExactOutputSingleParams {
uint subAccountIdIn;
uint subAccountIdOut;
address underlyingIn;
address underlyingOut;
uint amountOut;
uint amountInMaximum;
uint deadline;
uint24 fee;
uint160 sqrtPriceLimitX96;
}
/// @notice Params for Uniswap V3 exact output trade routed through multiple pools
/// @param subAccountIdIn subaccount id to trade from
/// @param subAccountIdOut subaccount id to trade to
/// @param underlyingIn sold token address
/// @param underlyingOut bought token address
/// @param amountOut amount of token to buy
/// @param amountInMaximum maximum amount of sold token
/// @param deadline trade must complete before this timestamp
/// @param path list of pools to use for the trade
struct SwapUniExactOutputParams {
uint subAccountIdIn;
uint subAccountIdOut;
uint amountOut;
uint amountInMaximum;
uint deadline;
bytes path;
}
/// @notice Params for 1Inch trade
/// @param subAccountIdIn subaccount id to trade from
/// @param subAccountIdOut subaccount id to trade to
/// @param underlyingIn sold token address
/// @param underlyingOut bought token address
/// @param amount amount of token to sell
/// @param amountOutMinimum minimum amount of bought token
/// @param payload call data passed to 1Inch contract
struct Swap1InchParams {
uint subAccountIdIn;
uint subAccountIdOut;
address underlyingIn;
address underlyingOut;
uint amount;
uint amountOutMinimum;
bytes payload;
}
struct SwapCache {
address accountIn;
address accountOut;
address eTokenIn;
address eTokenOut;
AssetCache assetCacheIn;
AssetCache assetCacheOut;
uint balanceIn;
uint balanceOut;
uint amountIn;
uint amountOut;
uint amountInternalIn;
}
constructor(bytes32 moduleGitCommit_, address uniswapRouter_, address oneInch_) BaseLogic(MODULEID__SWAP, moduleGitCommit_) {
uniswapRouter = uniswapRouter_;
oneInch = oneInch_;
}
/// @notice Execute Uniswap V3 exact input trade on a single pool
/// @param params struct defining trade parameters
function swapUniExactInputSingle(SwapUniExactInputSingleParams memory params) external nonReentrant {
SwapCache memory swap = initSwap(
params.underlyingIn,
params.underlyingOut,
params.amountIn,
params.subAccountIdIn,
params.subAccountIdOut,
SWAP_TYPE__UNI_EXACT_INPUT_SINGLE
);
setWithdrawAmounts(swap, params.amountIn);
Utils.safeApprove(params.underlyingIn, uniswapRouter, swap.amountIn);
swap.amountOut = ISwapRouter(uniswapRouter).exactInputSingle(
ISwapRouter.ExactInputSingleParams({
tokenIn: params.underlyingIn,
tokenOut: params.underlyingOut,
fee: params.fee,
recipient: address(this),
deadline: params.deadline > 0 ? params.deadline : block.timestamp,
amountIn: swap.amountIn,
amountOutMinimum: params.amountOutMinimum,
sqrtPriceLimitX96: params.sqrtPriceLimitX96
})
);
finalizeSwap(swap);
}
/// @notice Execute Uniswap V3 exact input trade routed through multiple pools
/// @param params struct defining trade parameters
function swapUniExactInput(SwapUniExactInputParams memory params) external nonReentrant {
(address underlyingIn, address underlyingOut) = decodeUniPath(params.path, false);
SwapCache memory swap = initSwap(
underlyingIn,
underlyingOut,
params.amountIn,
params.subAccountIdIn,
params.subAccountIdOut,
SWAP_TYPE__UNI_EXACT_INPUT
);
setWithdrawAmounts(swap, params.amountIn);
Utils.safeApprove(underlyingIn, uniswapRouter, swap.amountIn);
swap.amountOut = ISwapRouter(uniswapRouter).exactInput(
ISwapRouter.ExactInputParams({
path: params.path,
recipient: address(this),
deadline: params.deadline > 0 ? params.deadline : block.timestamp,
amountIn: swap.amountIn,
amountOutMinimum: params.amountOutMinimum
})
);
finalizeSwap(swap);
}
/// @notice Execute Uniswap V3 exact output trade on a single pool
/// @param params struct defining trade parameters
function swapUniExactOutputSingle(SwapUniExactOutputSingleParams memory params) external nonReentrant {
SwapCache memory swap = initSwap(
params.underlyingIn,
params.underlyingOut,
params.amountOut,
params.subAccountIdIn,
params.subAccountIdOut,
SWAP_TYPE__UNI_EXACT_OUTPUT_SINGLE
);
swap.amountOut = params.amountOut;
doSwapUniExactOutputSingle(swap, params);
finalizeSwap(swap);
}
/// @notice Execute Uniswap V3 exact output trade routed through multiple pools
/// @param params struct defining trade parameters
function swapUniExactOutput(SwapUniExactOutputParams memory params) external nonReentrant {
(address underlyingIn, address underlyingOut) = decodeUniPath(params.path, true);
SwapCache memory swap = initSwap(
underlyingIn,
underlyingOut,
params.amountOut,
params.subAccountIdIn,
params.subAccountIdOut,
SWAP_TYPE__UNI_EXACT_OUTPUT
);
swap.amountOut = params.amountOut;
doSwapUniExactOutput(swap, params, underlyingIn);
finalizeSwap(swap);
}
/// @notice Trade on Uniswap V3 single pool and repay debt with bought asset
/// @param params struct defining trade parameters (amountOut is ignored)
/// @param targetDebt amount of debt that is expected to remain after trade and repay (0 to repay full debt)
function swapAndRepayUniSingle(SwapUniExactOutputSingleParams memory params, uint targetDebt) external nonReentrant {
SwapCache memory swap = initSwap(
params.underlyingIn,
params.underlyingOut,
targetDebt,
params.subAccountIdIn,
params.subAccountIdOut,
SWAP_TYPE__UNI_EXACT_OUTPUT_SINGLE_REPAY
);
swap.amountOut = getRepayAmount(swap, targetDebt);
doSwapUniExactOutputSingle(swap, params);
finalizeSwapAndRepay(swap);
}
/// @notice Trade on Uniswap V3 through multiple pools pool and repay debt with bought asset
/// @param params struct defining trade parameters (amountOut is ignored)
/// @param targetDebt amount of debt that is expected to remain after trade and repay (0 to repay full debt)
function swapAndRepayUni(SwapUniExactOutputParams memory params, uint targetDebt) external nonReentrant {
(address underlyingIn, address underlyingOut) = decodeUniPath(params.path, true);
SwapCache memory swap = initSwap(
underlyingIn,
underlyingOut,
targetDebt,
params.subAccountIdIn,
params.subAccountIdOut,
SWAP_TYPE__UNI_EXACT_OUTPUT_REPAY
);
swap.amountOut = getRepayAmount(swap, targetDebt);
doSwapUniExactOutput(swap, params, underlyingIn);
finalizeSwapAndRepay(swap);
}
/// @notice Execute 1Inch V4 trade
/// @param params struct defining trade parameters
function swap1Inch(Swap1InchParams memory params) external nonReentrant {
SwapCache memory swap = initSwap(
params.underlyingIn,
params.underlyingOut,
params.amount,
params.subAccountIdIn,
params.subAccountIdOut,
SWAP_TYPE__1INCH
);
setWithdrawAmounts(swap, params.amount);
Utils.safeApprove(params.underlyingIn, oneInch, swap.amountIn);
(bool success, bytes memory result) = oneInch.call(params.payload);
if (!success) revertBytes(result);
swap.amountOut = abi.decode(result, (uint));
require(swap.amountOut >= params.amountOutMinimum, "e/swap/min-amount-out");
finalizeSwap(swap);
}
function initSwap(
address underlyingIn,
address underlyingOut,
uint amount,
uint subAccountIdIn,
uint subAccountIdOut,
uint swapType
) private returns (SwapCache memory swap) {
require(underlyingIn != underlyingOut, "e/swap/same");
address msgSender = unpackTrailingParamMsgSender();
swap.accountIn = getSubAccount(msgSender, subAccountIdIn);
swap.accountOut = getSubAccount(msgSender, subAccountIdOut);
updateAverageLiquidity(swap.accountIn);
if (swap.accountIn != swap.accountOut)
updateAverageLiquidity(swap.accountOut);
emit RequestSwap(
swap.accountIn,
swap.accountOut,
underlyingIn,
underlyingOut,
amount,
swapType
);
swap.eTokenIn = underlyingLookup[underlyingIn].eTokenAddress;
swap.eTokenOut = underlyingLookup[underlyingOut].eTokenAddress;
AssetStorage storage assetStorageIn = eTokenLookup[swap.eTokenIn];
AssetStorage storage assetStorageOut = eTokenLookup[swap.eTokenOut];
require(swap.eTokenIn != address(0), "e/swap/in-market-not-activated");
require(swap.eTokenOut != address(0), "e/swap/out-market-not-activated");
swap.assetCacheIn = loadAssetCache(underlyingIn, assetStorageIn);
swap.assetCacheOut = loadAssetCache(underlyingOut, assetStorageOut);
swap.balanceIn = callBalanceOf(swap.assetCacheIn, address(this)) ;
swap.balanceOut = callBalanceOf(swap.assetCacheOut, address(this));
}
function doSwapUniExactOutputSingle(SwapCache memory swap, SwapUniExactOutputSingleParams memory params) private {
Utils.safeApprove(params.underlyingIn, uniswapRouter, params.amountInMaximum);
uint pulledAmountIn = ISwapRouter(uniswapRouter).exactOutputSingle(
ISwapRouter.ExactOutputSingleParams({
tokenIn: params.underlyingIn,
tokenOut: params.underlyingOut,
fee: params.fee,
recipient: address(this),
deadline: params.deadline > 0 ? params.deadline : block.timestamp,
amountOut: swap.amountOut,
amountInMaximum: params.amountInMaximum,
sqrtPriceLimitX96: params.sqrtPriceLimitX96
})
);
Erequire(pulledAmountIn != type(uint).max, "e/swap/exact-out-amount-in");
setWithdrawAmounts(swap, pulledAmountIn);
if (swap.amountIn < params.amountInMaximum) {
Utils.safeApprove(params.underlyingIn, uniswapRouter, 0);
}
}
function doSwapUniExactOutput(SwapCache memory swap, SwapUniExactOutputParams memory params, address underlyingIn) private {
Utils.safeApprove(underlyingIn, uniswapRouter, params.amountInMaximum);
uint pulledAmountIn = ISwapRouter(uniswapRouter).exactOutput(
ISwapRouter.ExactOutputParams({
path: params.path,
recipient: address(this),
deadline: params.deadline > 0 ? params.deadline : block.timestamp,
amountOut: swap.amountOut,
amountInMaximum: params.amountInMaximum
})
);
Erequire(pulledAmountIn != type(uint).max, "e/swap/exact-out-amount-in");
setWithdrawAmounts(swap, pulledAmountIn);
if (swap.amountIn < params.amountInMaximum) {
Utils.safeApprove(underlyingIn, uniswapRouter, 0);
}
}
function setWithdrawAmounts(SwapCache memory swap, uint amount) private view {
(amount, swap.amountInternalIn) = withdrawAmounts(eTokenLookup[swap.eTokenIn], swap.assetCacheIn, swap.accountIn, amount);
require(swap.assetCacheIn.poolSize >= amount, "e/swap/insufficient-pool-size");
swap.amountIn = amount / swap.assetCacheIn.underlyingDecimalsScaler;
}
function finalizeSwap(SwapCache memory swap) private {
uint balanceIn = checkBalances(swap);
processWithdraw(eTokenLookup[swap.eTokenIn], swap.assetCacheIn, swap.eTokenIn, swap.accountIn, swap.amountInternalIn, balanceIn);
processDeposit(eTokenLookup[swap.eTokenOut], swap.assetCacheOut, swap.eTokenOut, swap.accountOut, swap.amountOut);
checkLiquidity(swap.accountIn);
}
function finalizeSwapAndRepay(SwapCache memory swap) private {
uint balanceIn = checkBalances(swap);
processWithdraw(eTokenLookup[swap.eTokenIn], swap.assetCacheIn, swap.eTokenIn, swap.accountIn, swap.amountInternalIn, balanceIn);
processRepay(eTokenLookup[swap.eTokenOut], swap.assetCacheOut, swap.accountOut, swap.amountOut);
// only checking outgoing account, repay can't lower health score
checkLiquidity(swap.accountIn);
}
function processWithdraw(AssetStorage storage assetStorage, AssetCache memory assetCache, address eTokenAddress, address account, uint amountInternal, uint balanceIn) private {
assetCache.poolSize = decodeExternalAmount(assetCache, balanceIn);
decreaseBalance(assetStorage, assetCache, eTokenAddress, account, amountInternal);
logAssetStatus(assetCache);
}
function processDeposit(AssetStorage storage assetStorage, AssetCache memory assetCache, address eTokenAddress, address account, uint amount) private {
uint amountDecoded = decodeExternalAmount(assetCache, amount);
uint amountInternal = underlyingAmountToBalance(assetCache, amountDecoded);
assetCache.poolSize += amountDecoded;
increaseBalance(assetStorage, assetCache, eTokenAddress, account, amountInternal);
if (assetStorage.users[account].owed != 0) checkLiquidity(account);
logAssetStatus(assetCache);
}
function processRepay(AssetStorage storage assetStorage, AssetCache memory assetCache, address account, uint amount) private {
decreaseBorrow(assetStorage, assetCache, assetStorage.dTokenAddress, account, decodeExternalAmount(assetCache, amount));
logAssetStatus(assetCache);
}
function checkBalances(SwapCache memory swap) private view returns (uint) {
uint balanceIn = callBalanceOf(swap.assetCacheIn, address(this));
Erequire(balanceIn == swap.balanceIn - swap.amountIn, "e/swap/balance-in");
Erequire(callBalanceOf(swap.assetCacheOut, address(this)) == swap.balanceOut + swap.amountOut, "e/swap/balance-out");
return balanceIn;
}
function decodeUniPath(bytes memory path, bool isExactOutput) private pure returns (address, address) {
require(path.length >= 20 + 3 + 20, "e/swap/uni-path-length");
require((path.length - 20) % 23 == 0, "e/swap/uni-path-format");
address token0 = toAddress(path, 0);
address token1 = toAddress(path, path.length - 20);
return isExactOutput ? (token1, token0) : (token0, token1);
}
function getRepayAmount(SwapCache memory swap, uint targetDebt) private view returns (uint) {
uint owed = getCurrentOwed(eTokenLookup[swap.eTokenOut], swap.assetCacheOut, swap.accountOut) / swap.assetCacheOut.underlyingDecimalsScaler;
require (owed > targetDebt, "e/swap/target-debt");
return owed - targetDebt;
}
function toAddress(bytes memory data, uint start) private pure returns (address result) {
// assuming data length is already validated
assembly {
// borrowed from BytesLib https://github.com/GNSPS/solidity-bytes-utils/blob/master/contracts/BytesLib.sol
result := div(mload(add(add(data, 0x20), start)), 0x1000000000000000000000000)
}
}
}
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