Contract Name:
LiFiDEXAggregator
Contract Source Code:
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.17;
import { SafeERC20, IERC20, IERC20Permit } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
address constant NATIVE_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
address constant IMPOSSIBLE_POOL_ADDRESS = 0x0000000000000000000000000000000000000001;
address constant INTERNAL_INPUT_SOURCE = 0x0000000000000000000000000000000000000000;
uint8 constant LOCKED = 2;
uint8 constant NOT_LOCKED = 1;
uint8 constant PAUSED = 2;
uint8 constant NOT_PAUSED = 1;
/// @dev The minimum value that can be returned from #getSqrtRatioAtTick. Equivalent to getSqrtRatioAtTick(MIN_TICK)
uint160 constant MIN_SQRT_RATIO = 4295128739;
/// @dev The maximum value that can be returned from #getSqrtRatioAtTick. Equivalent to getSqrtRatioAtTick(MAX_TICK)
uint160 constant MAX_SQRT_RATIO = 1461446703485210103287273052203988822378723970342;
/// @title LiFi DEX Aggregator
/// @author Ilya Lyalin (contract copied from: https://github.com/sushiswap/sushiswap/blob/c8c80dec821003eb72eb77c7e0446ddde8ca9e1e/protocols/route-processor/contracts/RouteProcessor4.sol)
/// @notice Processes calldata to swap using various DEXs
/// @custom:version 1.0.0
contract LiFiDEXAggregator is Ownable {
using SafeERC20 for IERC20;
using Approve for IERC20;
using SafeERC20 for IERC20Permit;
using InputStream for uint256;
event Route(
address indexed from,
address to,
address indexed tokenIn,
address indexed tokenOut,
uint256 amountIn,
uint256 amountOutMin,
uint256 amountOut
);
error MinimalOutputBalanceViolation(uint256 amountOut);
IBentoBoxMinimal public immutable bentoBox;
mapping(address => bool) public priviledgedUsers;
address private lastCalledPool;
uint8 private unlocked = NOT_LOCKED;
uint8 private paused = NOT_PAUSED;
modifier lock() {
require(unlocked == NOT_LOCKED, "RouteProcessor is locked");
require(paused == NOT_PAUSED, "RouteProcessor is paused");
unlocked = LOCKED;
_;
unlocked = NOT_LOCKED;
}
modifier onlyOwnerOrPriviledgedUser() {
require(
msg.sender == owner() || priviledgedUsers[msg.sender],
"RP: caller is not the owner or a privileged user"
);
_;
}
constructor(address _bentoBox, address[] memory priviledgedUserList) {
bentoBox = IBentoBoxMinimal(_bentoBox);
lastCalledPool = IMPOSSIBLE_POOL_ADDRESS;
for (uint256 i = 0; i < priviledgedUserList.length; i++) {
priviledgedUsers[priviledgedUserList[i]] = true;
}
}
function setPriviledge(address user, bool priviledge) external onlyOwner {
priviledgedUsers[user] = priviledge;
}
function pause() external onlyOwnerOrPriviledgedUser {
paused = PAUSED;
}
function resume() external onlyOwnerOrPriviledgedUser {
paused = NOT_PAUSED;
}
/// @notice For native unwrapping
receive() external payable {}
/// @notice Processes the route generated off-chain. Has a lock
/// @param tokenIn Address of the input token
/// @param amountIn Amount of the input token
/// @param tokenOut Address of the output token
/// @param amountOutMin Minimum amount of the output token
/// @return amountOut Actual amount of the output token
function processRoute(
address tokenIn,
uint256 amountIn,
address tokenOut,
uint256 amountOutMin,
address to,
bytes memory route
) external payable lock returns (uint256 amountOut) {
return
processRouteInternal(
tokenIn,
amountIn,
tokenOut,
amountOutMin,
to,
route
);
}
/// @notice Transfers some value to <transferValueTo> and then processes the route
/// @param transferValueTo Address where the value should be transferred
/// @param amountValueTransfer How much value to transfer
/// @param tokenIn Address of the input token
/// @param amountIn Amount of the input token
/// @param tokenOut Address of the output token
/// @param amountOutMin Minimum amount of the output token
/// @return amountOut Actual amount of the output token
function transferValueAndprocessRoute(
address payable transferValueTo,
uint256 amountValueTransfer,
address tokenIn,
uint256 amountIn,
address tokenOut,
uint256 amountOutMin,
address to,
bytes memory route
) external payable lock returns (uint256 amountOut) {
(bool success, bytes memory returnBytes) = transferValueTo.call{
value: amountValueTransfer
}("");
if (!success) {
assembly {
revert(add(32, returnBytes), mload(returnBytes))
}
}
return
processRouteInternal(
tokenIn,
amountIn,
tokenOut,
amountOutMin,
to,
route
);
}
/// @notice Processes the route generated off-chain
/// @param tokenIn Address of the input token
/// @param amountIn Amount of the input token
/// @param tokenOut Address of the output token
/// @param amountOutMin Minimum amount of the output token
/// @return amountOut Actual amount of the output token
function processRouteInternal(
address tokenIn,
uint256 amountIn,
address tokenOut,
uint256 amountOutMin,
address to,
bytes memory route
) private returns (uint256 amountOut) {
uint256 balanceInInitial = tokenIn == NATIVE_ADDRESS
? 0
: IERC20(tokenIn).balanceOf(msg.sender);
uint256 balanceOutInitial = tokenOut == NATIVE_ADDRESS
? address(to).balance
: IERC20(tokenOut).balanceOf(to);
uint256 realAmountIn = amountIn;
{
uint256 step = 0;
uint256 stream = InputStream.createStream(route);
while (stream.isNotEmpty()) {
uint8 commandCode = stream.readUint8();
if (commandCode == 1) {
uint256 usedAmount = processMyERC20(stream);
if (step == 0) realAmountIn = usedAmount;
} else if (commandCode == 2)
processUserERC20(stream, amountIn);
else if (commandCode == 3) {
uint256 usedAmount = processNative(stream);
if (step == 0) realAmountIn = usedAmount;
} else if (commandCode == 4) processOnePool(stream);
else if (commandCode == 5) processInsideBento(stream);
else if (commandCode == 6) applyPermit(tokenIn, stream);
else revert("RouteProcessor: Unknown command code");
++step;
}
}
uint256 balanceInFinal = tokenIn == NATIVE_ADDRESS
? 0
: IERC20(tokenIn).balanceOf(msg.sender);
require(
balanceInFinal + amountIn >= balanceInInitial,
"RouteProcessor: Minimal input balance violation"
);
uint256 balanceOutFinal = tokenOut == NATIVE_ADDRESS
? address(to).balance
: IERC20(tokenOut).balanceOf(to);
if (balanceOutFinal < balanceOutInitial + amountOutMin)
revert MinimalOutputBalanceViolation(
balanceOutFinal - balanceOutInitial
);
amountOut = balanceOutFinal - balanceOutInitial;
emit Route(
msg.sender,
to,
tokenIn,
tokenOut,
realAmountIn,
amountOutMin,
amountOut
);
}
/// @notice Applies ERC-2612 permit
/// @param tokenIn permitted token
/// @param stream Streamed program
function applyPermit(address tokenIn, uint256 stream) private {
uint256 value = stream.readUint();
uint256 deadline = stream.readUint();
uint8 v = stream.readUint8();
bytes32 r = stream.readBytes32();
bytes32 s = stream.readBytes32();
IERC20Permit(tokenIn).safePermit(
msg.sender,
address(this),
value,
deadline,
v,
r,
s
);
}
/// @notice Processes native coin: call swap for all pools that swap from native coin
/// @param stream Streamed program
function processNative(
uint256 stream
) private returns (uint256 amountTotal) {
amountTotal = address(this).balance;
distributeAndSwap(stream, address(this), NATIVE_ADDRESS, amountTotal);
}
/// @notice Processes ERC20 token from this contract balance:
/// @notice Call swap for all pools that swap from this token
/// @param stream Streamed program
function processMyERC20(
uint256 stream
) private returns (uint256 amountTotal) {
address token = stream.readAddress();
amountTotal = IERC20(token).balanceOf(address(this));
unchecked {
if (amountTotal > 0) amountTotal -= 1; // slot undrain protection
}
distributeAndSwap(stream, address(this), token, amountTotal);
}
/// @notice Processes ERC20 token from msg.sender balance:
/// @notice Call swap for all pools that swap from this token
/// @param stream Streamed program
/// @param amountTotal Amount of tokens to take from msg.sender
function processUserERC20(uint256 stream, uint256 amountTotal) private {
address token = stream.readAddress();
distributeAndSwap(stream, msg.sender, token, amountTotal);
}
/// @notice Processes ERC20 token for cases when the token has only one output pool
/// @notice In this case liquidity is already at pool balance. This is an optimization
/// @notice Call swap for all pools that swap from this token
/// @param stream Streamed program
function processOnePool(uint256 stream) private {
address token = stream.readAddress();
swap(stream, INTERNAL_INPUT_SOURCE, token, 0);
}
/// @notice Processes Bento tokens
/// @notice Call swap for all pools that swap from this token
/// @param stream Streamed program
function processInsideBento(uint256 stream) private {
address token = stream.readAddress();
uint256 amountTotal = bentoBox.balanceOf(token, address(this));
unchecked {
if (amountTotal > 0) amountTotal -= 1; // slot undrain protection
}
distributeAndSwap(stream, address(this), token, amountTotal);
}
/// @notice Distributes amountTotal to several pools according to their shares and calls swap for each pool
/// @param stream Streamed program
/// @param from Where to take liquidity for swap
/// @param tokenIn Input token
/// @param amountTotal Total amount of tokenIn for swaps
function distributeAndSwap(
uint256 stream,
address from,
address tokenIn,
uint256 amountTotal
) private {
uint8 num = stream.readUint8();
unchecked {
for (uint256 i = 0; i < num; ++i) {
uint16 share = stream.readUint16();
uint256 amount = (amountTotal * share) /
type(uint16).max /*65535*/;
amountTotal -= amount;
swap(stream, from, tokenIn, amount);
}
}
}
/// @notice Makes swap
/// @param stream Streamed program
/// @param from Where to take liquidity for swap
/// @param tokenIn Input token
/// @param amountIn Amount of tokenIn to take for swap
function swap(
uint256 stream,
address from,
address tokenIn,
uint256 amountIn
) private {
uint8 poolType = stream.readUint8();
if (poolType == 0) swapUniV2(stream, from, tokenIn, amountIn);
else if (poolType == 1) swapUniV3(stream, from, tokenIn, amountIn);
else if (poolType == 2) wrapNative(stream, from, tokenIn, amountIn);
else if (poolType == 3) bentoBridge(stream, from, tokenIn, amountIn);
else if (poolType == 4) swapTrident(stream, from, tokenIn, amountIn);
else if (poolType == 5) swapCurve(stream, from, tokenIn, amountIn);
else revert("RouteProcessor: Unknown pool type");
}
/// @notice Wraps/unwraps native token
/// @param stream [direction & fake, recipient, wrapToken?]
/// @param from Where to take liquidity for swap
/// @param tokenIn Input token
/// @param amountIn Amount of tokenIn to take for swap
function wrapNative(
uint256 stream,
address from,
address tokenIn,
uint256 amountIn
) private {
uint8 directionAndFake = stream.readUint8();
address to = stream.readAddress();
if (directionAndFake & 1 == 1) {
// wrap native
address wrapToken = stream.readAddress();
if (directionAndFake & 2 == 0)
IWETH(wrapToken).deposit{ value: amountIn }();
if (to != address(this))
IERC20(wrapToken).safeTransfer(to, amountIn);
} else {
// unwrap native
if (directionAndFake & 2 == 0) {
if (from == msg.sender)
IERC20(tokenIn).safeTransferFrom(
msg.sender,
address(this),
amountIn
);
IWETH(tokenIn).withdraw(amountIn);
}
(bool success, ) = payable(to).call{ value: amountIn }("");
require(
success,
"RouteProcessor.wrapNative: Native token transfer failed"
);
}
}
/// @notice Bridge/unbridge tokens to/from Bento
/// @param stream [direction, recipient]
/// @param from Where to take liquidity for swap
/// @param tokenIn Input token
/// @param amountIn Amount of tokenIn to take for swap
function bentoBridge(
uint256 stream,
address from,
address tokenIn,
uint256 amountIn
) private {
uint8 direction = stream.readUint8();
address to = stream.readAddress();
if (direction > 0) {
// outside to Bento
// deposit to arbitrary recipient is possible only from address(bentoBox)
if (from == address(this))
IERC20(tokenIn).safeTransfer(address(bentoBox), amountIn);
else if (from == msg.sender)
IERC20(tokenIn).safeTransferFrom(
msg.sender,
address(bentoBox),
amountIn
);
else {
// tokens already are at address(bentoBox)
amountIn =
IERC20(tokenIn).balanceOf(address(bentoBox)) +
bentoBox.strategyData(tokenIn).balance -
bentoBox.totals(tokenIn).elastic;
}
bentoBox.deposit(tokenIn, address(bentoBox), to, amountIn, 0);
} else {
// Bento to outside
if (from != INTERNAL_INPUT_SOURCE) {
bentoBox.transfer(tokenIn, from, address(this), amountIn);
} else amountIn = bentoBox.balanceOf(tokenIn, address(this));
bentoBox.withdraw(tokenIn, address(this), to, 0, amountIn);
}
}
/// @notice UniswapV2 pool swap
/// @param stream [pool, direction, recipient, fee]
/// @param from Where to take liquidity for swap
/// @param tokenIn Input token
/// @param amountIn Amount of tokenIn to take for swap
function swapUniV2(
uint256 stream,
address from,
address tokenIn,
uint256 amountIn
) private {
address pool = stream.readAddress();
uint8 direction = stream.readUint8();
address to = stream.readAddress();
uint24 fee = stream.readUint24(); // pool fee in 1/1_000_000
if (from == address(this))
IERC20(tokenIn).safeTransfer(pool, amountIn);
else if (from == msg.sender)
IERC20(tokenIn).safeTransferFrom(msg.sender, pool, amountIn);
(uint256 r0, uint256 r1, ) = IUniswapV2Pair(pool).getReserves();
require(r0 > 0 && r1 > 0, "Wrong pool reserves");
(uint256 reserveIn, uint256 reserveOut) = direction == 1
? (r0, r1)
: (r1, r0);
amountIn = IERC20(tokenIn).balanceOf(pool) - reserveIn; // tokens already were transferred
uint256 amountInWithFee = amountIn * (1_000_000 - fee);
uint256 amountOut = (amountInWithFee * reserveOut) /
(reserveIn * 1_000_000 + amountInWithFee);
(uint256 amount0Out, uint256 amount1Out) = direction == 1
? (uint256(0), amountOut)
: (amountOut, uint256(0));
IUniswapV2Pair(pool).swap(amount0Out, amount1Out, to, new bytes(0));
}
/// @notice Trident pool swap
/// @param stream [pool, swapData]
/// @param from Where to take liquidity for swap
/// @param tokenIn Input token
/// @param amountIn Amount of tokenIn to take for swap
function swapTrident(
uint256 stream,
address from,
address tokenIn,
uint256 amountIn
) private {
address pool = stream.readAddress();
bytes memory swapData = stream.readBytes();
if (from != INTERNAL_INPUT_SOURCE) {
bentoBox.transfer(tokenIn, from, pool, amountIn);
}
IPool(pool).swap(swapData);
}
/// @notice UniswapV3 pool swap
/// @param stream [pool, direction, recipient]
/// @param from Where to take liquidity for swap
/// @param tokenIn Input token
/// @param amountIn Amount of tokenIn to take for swap
function swapUniV3(
uint256 stream,
address from,
address tokenIn,
uint256 amountIn
) private {
address pool = stream.readAddress();
bool zeroForOne = stream.readUint8() > 0;
address recipient = stream.readAddress();
if (from == msg.sender)
IERC20(tokenIn).safeTransferFrom(
msg.sender,
address(this),
uint256(amountIn)
);
lastCalledPool = pool;
IUniswapV3Pool(pool).swap(
recipient,
zeroForOne,
int256(amountIn),
zeroForOne ? MIN_SQRT_RATIO + 1 : MAX_SQRT_RATIO - 1,
abi.encode(tokenIn)
);
require(
lastCalledPool == IMPOSSIBLE_POOL_ADDRESS,
"RouteProcessor.swapUniV3: unexpected"
); // Just to be sure
}
/// @notice Called to `msg.sender` after executing a swap via IUniswapV3Pool#swap.
/// @dev In the implementation you must pay the pool tokens owed for the swap.
/// The caller of this method must be checked to be a UniswapV3Pool deployed by the canonical UniswapV3Factory.
/// amount0Delta and amount1Delta can both be 0 if no tokens were swapped.
/// @param amount0Delta The amount of token0 that was sent (negative) or must be received (positive) by the pool by
/// the end of the swap. If positive, the callback must send that amount of token0 to the pool.
/// @param amount1Delta The amount of token1 that was sent (negative) or must be received (positive) by the pool by
/// the end of the swap. If positive, the callback must send that amount of token1 to the pool.
/// @param data Any data passed through by the caller via the IUniswapV3PoolActions#swap call
function uniswapV3SwapCallback(
int256 amount0Delta,
int256 amount1Delta,
bytes calldata data
) public {
require(
msg.sender == lastCalledPool,
"RouteProcessor.uniswapV3SwapCallback: call from unknown source"
);
int256 amount = amount0Delta > 0 ? amount0Delta : amount1Delta;
require(
amount > 0,
"RouteProcessor.uniswapV3SwapCallback: not positive amount"
);
lastCalledPool = IMPOSSIBLE_POOL_ADDRESS;
address tokenIn = abi.decode(data, (address));
IERC20(tokenIn).safeTransfer(msg.sender, uint256(amount));
}
/// @notice Called to `msg.sender` after executing a swap via IAlgebraPool#swap.
/// @dev In the implementation you must pay the pool tokens owed for the swap.
/// The caller of this method _must_ be checked to be a AlgebraPool deployed by the canonical AlgebraFactory.
/// amount0Delta and amount1Delta can both be 0 if no tokens were swapped.
/// @param amount0Delta The amount of token0 that was sent (negative) or must be received (positive) by the pool by
/// the end of the swap. If positive, the callback must send that amount of token0 to the pool.
/// @param amount1Delta The amount of token1 that was sent (negative) or must be received (positive) by the pool by
/// the end of the swap. If positive, the callback must send that amount of token1 to the pool.
/// @param data Any data passed through by the caller via the IAlgebraPoolActions#swap call
function algebraSwapCallback(
int256 amount0Delta,
int256 amount1Delta,
bytes calldata data
) external {
uniswapV3SwapCallback(amount0Delta, amount1Delta, data);
}
/// @notice Called to `msg.sender` after executing a swap via PancakeV3Pool#swap.
/// @dev In the implementation you must pay the pool tokens owed for the swap.
/// @param amount0Delta The amount of token0 that was sent (negative) or must be received (positive) by the pool by
/// the end of the swap. If positive, the callback must send that amount of token0 to the pool.
/// @param amount1Delta The amount of token1 that was sent (negative) or must be received (positive) by the pool by
/// the end of the swap. If positive, the callback must send that amount of token1 to the pool.
/// @param data Any data passed through by the caller via the PancakeV3Pool#swap call
function pancakeV3SwapCallback(
int256 amount0Delta,
int256 amount1Delta,
bytes calldata data
) external {
uniswapV3SwapCallback(amount0Delta, amount1Delta, data);
}
/// @notice Curve pool swap. Legacy pools that don't return amountOut and have native coins are not supported
/// @param stream [pool, poolType, fromIndex, toIndex, recipient, output token]
/// @param from Where to take liquidity for swap
/// @param tokenIn Input token
/// @param amountIn Amount of tokenIn to take for swap
function swapCurve(
uint256 stream,
address from,
address tokenIn,
uint256 amountIn
) private {
address pool = stream.readAddress();
uint8 poolType = stream.readUint8();
int128 fromIndex = int8(stream.readUint8());
int128 toIndex = int8(stream.readUint8());
address to = stream.readAddress();
address tokenOut = stream.readAddress();
uint256 amountOut;
if (tokenIn == NATIVE_ADDRESS) {
amountOut = ICurve(pool).exchange{ value: amountIn }(
fromIndex,
toIndex,
amountIn,
0
);
} else {
if (from == msg.sender)
IERC20(tokenIn).safeTransferFrom(
msg.sender,
address(this),
amountIn
);
IERC20(tokenIn).approveSafe(pool, amountIn);
if (poolType == 0)
amountOut = ICurve(pool).exchange(
fromIndex,
toIndex,
amountIn,
0
);
else {
uint256 balanceBefore = IERC20(tokenOut).balanceOf(
address(this)
);
ICurveLegacy(pool).exchange(fromIndex, toIndex, amountIn, 0);
uint256 balanceAfter = IERC20(tokenOut).balanceOf(
address(this)
);
amountOut = balanceAfter - balanceBefore;
}
}
if (to != address(this)) {
if (tokenOut == NATIVE_ADDRESS) {
(bool success, ) = payable(to).call{ value: amountOut }("");
require(
success,
"RouteProcessor.swapCurve: Native token transfer failed"
);
} else {
IERC20(tokenOut).safeTransfer(to, amountOut);
}
}
}
}
/// @notice Minimal BentoBox vault interface.
/// @dev `token` is aliased as `address` from `IERC20` for simplicity.
interface IBentoBoxMinimal {
/// @notice Balance per ERC-20 token per account in shares.
function balanceOf(address, address) external view returns (uint256);
/// @dev Helper function to represent an `amount` of `token` in shares.
/// @param token The ERC-20 token.
/// @param amount The `token` amount.
/// @param roundUp If the result `share` should be rounded up.
/// @return share The token amount represented in shares.
function toShare(
address token,
uint256 amount,
bool roundUp
) external view returns (uint256 share);
/// @dev Helper function to represent shares back into the `token` amount.
/// @param token The ERC-20 token.
/// @param share The amount of shares.
/// @param roundUp If the result should be rounded up.
/// @return amount The share amount back into native representation.
function toAmount(
address token,
uint256 share,
bool roundUp
) external view returns (uint256 amount);
/// @notice Registers this contract so that users can approve it for BentoBox.
function registerProtocol() external;
/// @notice Deposit an amount of `token` represented in either `amount` or `share`.
/// @param token The ERC-20 token to deposit.
/// @param from which account to pull the tokens.
/// @param to which account to push the tokens.
/// @param amount Token amount in native representation to deposit.
/// @param share Token amount represented in shares to deposit. Takes precedence over `amount`.
/// @return amountOut The amount deposited.
/// @return shareOut The deposited amount represented in shares.
function deposit(
address token,
address from,
address to,
uint256 amount,
uint256 share
) external payable returns (uint256 amountOut, uint256 shareOut);
/// @notice Withdraws an amount of `token` from a user account.
/// @param token_ The ERC-20 token to withdraw.
/// @param from which user to pull the tokens.
/// @param to which user to push the tokens.
/// @param amount of tokens. Either one of `amount` or `share` needs to be supplied.
/// @param share Like above, but `share` takes precedence over `amount`.
function withdraw(
address token_,
address from,
address to,
uint256 amount,
uint256 share
) external returns (uint256 amountOut, uint256 shareOut);
/// @notice Transfer shares from a user account to another one.
/// @param token The ERC-20 token to transfer.
/// @param from which user to pull the tokens.
/// @param to which user to push the tokens.
/// @param share The amount of `token` in shares.
function transfer(
address token,
address from,
address to,
uint256 share
) external;
/// @dev Reads the Rebase `totals`from storage for a given token
function totals(address token) external view returns (Rebase memory total);
function strategyData(
address token
) external view returns (StrategyData memory total);
/// @dev Approves users' BentoBox assets to a "master" contract.
function setMasterContractApproval(
address user,
address masterContract,
bool approved,
uint8 v,
bytes32 r,
bytes32 s
) external;
function harvest(
address token,
bool balance,
uint256 maxChangeAmount
) external;
}
interface ICurve {
function exchange(
int128 i,
int128 j,
uint256 dx,
uint256 min_dy
) external payable returns (uint256);
}
interface ICurveLegacy {
function exchange(
int128 i,
int128 j,
uint256 dx,
uint256 min_dy
) external payable;
}
/// @notice Trident pool interface.
interface IPool {
/// @notice Executes a swap from one token to another.
/// @dev The input tokens must've already been sent to the pool.
/// @param data ABI-encoded params that the pool requires.
/// @return finalAmountOut The amount of output tokens that were sent to the user.
function swap(
bytes calldata data
) external returns (uint256 finalAmountOut);
/// @notice Executes a swap from one token to another with a callback.
/// @dev This function allows borrowing the output tokens and sending the input tokens in the callback.
/// @param data ABI-encoded params that the pool requires.
/// @return finalAmountOut The amount of output tokens that were sent to the user.
function flashSwap(
bytes calldata data
) external returns (uint256 finalAmountOut);
/// @notice Mints liquidity tokens.
/// @param data ABI-encoded params that the pool requires.
/// @return liquidity The amount of liquidity tokens that were minted for the user.
function mint(bytes calldata data) external returns (uint256 liquidity);
/// @notice Burns liquidity tokens.
/// @dev The input LP tokens must've already been sent to the pool.
/// @param data ABI-encoded params that the pool requires.
/// @return withdrawnAmounts The amount of various output tokens that were sent to the user.
function burn(
bytes calldata data
) external returns (TokenAmount[] memory withdrawnAmounts);
/// @notice Burns liquidity tokens for a single output token.
/// @dev The input LP tokens must've already been sent to the pool.
/// @param data ABI-encoded params that the pool requires.
/// @return amountOut The amount of output tokens that were sent to the user.
function burnSingle(
bytes calldata data
) external returns (uint256 amountOut);
/// @return A unique identifier for the pool type.
function poolIdentifier() external pure returns (bytes32);
/// @return An array of tokens supported by the pool.
function getAssets() external view returns (address[] memory);
/// @notice Simulates a trade and returns the expected output.
/// @dev The pool does not need to include a trade simulator directly in itself - it can use a library.
/// @param data ABI-encoded params that the pool requires.
/// @return finalAmountOut The amount of output tokens that will be sent to the user if the trade is executed.
function getAmountOut(
bytes calldata data
) external view returns (uint256 finalAmountOut);
/// @notice Simulates a trade and returns the expected output.
/// @dev The pool does not need to include a trade simulator directly in itself - it can use a library.
/// @param data ABI-encoded params that the pool requires.
/// @return finalAmountIn The amount of input tokens that are required from the user if the trade is executed.
function getAmountIn(
bytes calldata data
) external view returns (uint256 finalAmountIn);
/// @dev This event must be emitted on all swaps.
event Swap(
address indexed recipient,
address indexed tokenIn,
address indexed tokenOut,
uint256 amountIn,
uint256 amountOut
);
/// @dev This struct frames output tokens for burns.
struct TokenAmount {
address token;
uint256 amount;
}
}
interface ITridentCLPool {
function token0() external returns (address);
function token1() external returns (address);
function swap(
address recipient,
bool zeroForOne,
int256 amountSpecified,
uint160 sqrtPriceLimitX96,
bool unwrapBento,
bytes calldata data
) external returns (int256 amount0, int256 amount1);
}
interface IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(
address owner,
address spender
) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(
address from,
address to,
uint value
) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
function permit(
address owner,
address spender,
uint value,
uint deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(
address indexed sender,
uint amount0,
uint amount1,
address indexed to
);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves()
external
view
returns (
uint112 reserve0,
uint112 reserve1,
uint32 blockTimestampLast
);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(
uint amount0Out,
uint amount1Out,
address to,
bytes calldata data
) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
interface IUniswapV3Pool {
function token0() external returns (address);
function token1() external returns (address);
function swap(
address recipient,
bool zeroForOne,
int256 amountSpecified,
uint160 sqrtPriceLimitX96,
bytes calldata data
) external returns (int256 amount0, int256 amount1);
}
interface IWETH {
function deposit() external payable;
function transfer(address to, uint256 value) external returns (bool);
function withdraw(uint256) external;
}
/** @notice Simple read stream */
library InputStream {
/** @notice Creates stream from data
* @param data data
*/
function createStream(
bytes memory data
) internal pure returns (uint256 stream) {
assembly {
stream := mload(0x40)
mstore(0x40, add(stream, 64))
mstore(stream, data)
let length := mload(data)
mstore(add(stream, 32), add(data, length))
}
}
/** @notice Checks if stream is not empty
* @param stream stream
*/
function isNotEmpty(uint256 stream) internal pure returns (bool) {
uint256 pos;
uint256 finish;
assembly {
pos := mload(stream)
finish := mload(add(stream, 32))
}
return pos < finish;
}
/** @notice Reads uint8 from the stream
* @param stream stream
*/
function readUint8(uint256 stream) internal pure returns (uint8 res) {
assembly {
let pos := mload(stream)
pos := add(pos, 1)
res := mload(pos)
mstore(stream, pos)
}
}
/** @notice Reads uint16 from the stream
* @param stream stream
*/
function readUint16(uint256 stream) internal pure returns (uint16 res) {
assembly {
let pos := mload(stream)
pos := add(pos, 2)
res := mload(pos)
mstore(stream, pos)
}
}
/** @notice Reads uint24 from the stream
* @param stream stream
*/
function readUint24(uint256 stream) internal pure returns (uint24 res) {
assembly {
let pos := mload(stream)
pos := add(pos, 3)
res := mload(pos)
mstore(stream, pos)
}
}
/** @notice Reads uint32 from the stream
* @param stream stream
*/
function readUint32(uint256 stream) internal pure returns (uint32 res) {
assembly {
let pos := mload(stream)
pos := add(pos, 4)
res := mload(pos)
mstore(stream, pos)
}
}
/** @notice Reads uint256 from the stream
* @param stream stream
*/
function readUint(uint256 stream) internal pure returns (uint256 res) {
assembly {
let pos := mload(stream)
pos := add(pos, 32)
res := mload(pos)
mstore(stream, pos)
}
}
/** @notice Reads bytes32 from the stream
* @param stream stream
*/
function readBytes32(uint256 stream) internal pure returns (bytes32 res) {
assembly {
let pos := mload(stream)
pos := add(pos, 32)
res := mload(pos)
mstore(stream, pos)
}
}
/** @notice Reads address from the stream
* @param stream stream
*/
function readAddress(uint256 stream) internal pure returns (address res) {
assembly {
let pos := mload(stream)
pos := add(pos, 20)
res := mload(pos)
mstore(stream, pos)
}
}
/** @notice Reads bytes from the stream
* @param stream stream
*/
function readBytes(
uint256 stream
) internal pure returns (bytes memory res) {
assembly {
let pos := mload(stream)
res := add(pos, 32)
let length := mload(res)
mstore(stream, add(res, length))
}
}
}
library Approve {
/**
* @dev ERC20 approve that correct works with token.approve which returns bool or nothing (USDT for example)
* @param token The token targeted by the call.
* @param spender token spender
* @param amount token amount
*/
function approveStable(
IERC20 token,
address spender,
uint256 amount
) internal returns (bool) {
(bool success, bytes memory data) = address(token).call(
abi.encodeWithSelector(token.approve.selector, spender, amount)
);
return success && (data.length == 0 || abi.decode(data, (bool)));
}
/**
* @dev ERC20 approve that correct works with token.approve which reverts if amount and
* current allowance are not zero simultaniously (USDT for example).
* In second case it tries to set allowance to 0, and then back to amount.
* @param token The token targeted by the call.
* @param spender token spender
* @param amount token amount
*/
function approveSafe(
IERC20 token,
address spender,
uint256 amount
) internal returns (bool) {
return
approveStable(token, spender, amount) ||
(approveStable(token, spender, 0) &&
approveStable(token, spender, amount));
}
}
struct Rebase {
uint128 elastic;
uint128 base;
}
struct StrategyData {
uint64 strategyStartDate;
uint64 targetPercentage;
uint128 balance; // the balance of the strategy that BentoBox thinks is in there
}
/// @notice A rebasing library
library RebaseLibrary {
/// @notice Calculates the base value in relationship to `elastic` and `total`.
function toBase(
Rebase memory total,
uint256 elastic
) internal pure returns (uint256 base) {
if (total.elastic == 0) {
base = elastic;
} else {
base = (elastic * total.base) / total.elastic;
}
}
/// @notice Calculates the elastic value in relationship to `base` and `total`.
function toElastic(
Rebase memory total,
uint256 base
) internal pure returns (uint256 elastic) {
if (total.base == 0) {
elastic = base;
} else {
elastic = (base * total.elastic) / total.base;
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../extensions/IERC20Permit.sol";
import "../../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
/**
* @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
* non-reverting calls are assumed to be successful.
*/
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
/**
* @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
* calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
*/
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
/**
* @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
* non-reverting calls are assumed to be successful.
*/
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 oldAllowance = token.allowance(address(this), spender);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
}
/**
* @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
* non-reverting calls are assumed to be successful.
*/
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
}
}
/**
* @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
* non-reverting calls are assumed to be successful. Compatible with tokens that require the approval to be set to
* 0 before setting it to a non-zero value.
*/
function forceApprove(IERC20 token, address spender, uint256 value) internal {
bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);
if (!_callOptionalReturnBool(token, approvalCall)) {
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
_callOptionalReturn(token, approvalCall);
}
}
/**
* @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
* Revert on invalid signature.
*/
function safePermit(
IERC20Permit token,
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) internal {
uint256 nonceBefore = token.nonces(owner);
token.permit(owner, spender, value, deadline, v, r, s);
uint256 nonceAfter = token.nonces(owner);
require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*
* This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
*/
function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
// and not revert is the subcall reverts.
(bool success, bytes memory returndata) = address(token).call(data);
return
success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
_checkOwner();
_;
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if the sender is not the owner.
*/
function _checkOwner() internal view virtual {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby disabling any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `from` to `to` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address from, address to, uint256 amount) external returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*/
interface IERC20Permit {
/**
* @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
* given ``owner``'s signed approval.
*
* IMPORTANT: The same issues {IERC20-approve} has related to transaction
* ordering also apply here.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `deadline` must be a timestamp in the future.
* - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
* over the EIP712-formatted function arguments.
* - the signature must use ``owner``'s current nonce (see {nonces}).
*
* For more information on the signature format, see the
* https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
* section].
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
/**
* @dev Returns the current nonce for `owner`. This value must be
* included whenever a signature is generated for {permit}.
*
* Every successful call to {permit} increases ``owner``'s nonce by one. This
* prevents a signature from being used multiple times.
*/
function nonces(address owner) external view returns (uint256);
/**
* @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view returns (bytes32);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
*
* Furthermore, `isContract` will also return true if the target contract within
* the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
* which only has an effect at the end of a transaction.
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
* the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
*
* _Available since v4.8._
*/
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata,
string memory errorMessage
) internal view returns (bytes memory) {
if (success) {
if (returndata.length == 0) {
// only check isContract if the call was successful and the return data is empty
// otherwise we already know that it was a contract
require(isContract(target), "Address: call to non-contract");
}
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
/**
* @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason or using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
function _revert(bytes memory returndata, string memory errorMessage) private pure {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}