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Latest 25 from a total of 13,342 transactions
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Bridge | 20910667 | 77 days ago | IN | 0.08940586 ETH | 0.00098832 | ||||
Bridge | 20889318 | 80 days ago | IN | 0 ETH | 0.00061727 | ||||
Bridge | 20840830 | 86 days ago | IN | 0.02 ETH | 0.00096752 | ||||
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Bridge | 20693482 | 107 days ago | IN | 1.42 ETH | 0.00090071 | ||||
Bridge | 20631196 | 116 days ago | IN | 0.18851613 ETH | 0.00006352 | ||||
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Latest 25 internal transactions (View All)
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20965028 | 69 days ago | 0.4 ETH | ||||
20910667 | 77 days ago | 0.08940586 ETH | ||||
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20816982 | 90 days ago | 0.09 ETH | ||||
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20469136 | 138 days ago | 1.15 ETH | ||||
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20468947 | 138 days ago | 0.35 ETH | ||||
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20468593 | 138 days ago | 1.91 ETH | ||||
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Contract Name:
FastBridgeRouter
Compiler Version
v0.8.17+commit.8df45f5f
Optimization Enabled:
Yes with 200 runs
Other Settings:
london EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity 0.8.17; import {DefaultRouter} from "../router/DefaultRouter.sol"; import {UniversalTokenLib} from "../router/libs/UniversalToken.sol"; import {ActionLib, LimitedToken} from "../router/libs/Structs.sol"; import {IFastBridge} from "./interfaces/IFastBridge.sol"; import {IFastBridgeRouter, SwapQuery} from "./interfaces/IFastBridgeRouter.sol"; import {ISwapQuoter} from "./interfaces/ISwapQuoter.sol"; import {Ownable} from "@openzeppelin/contracts-4.5.0/access/Ownable.sol"; contract FastBridgeRouter is DefaultRouter, Ownable, IFastBridgeRouter { using UniversalTokenLib for address; /// @notice Emitted when the swap quoter is set. /// @param newSwapQuoter The new swap quoter. event SwapQuoterSet(address newSwapQuoter); /// @notice Emitted when the new FastBridge contract is set. /// @param newFastBridge The new FastBridge contract. event FastBridgeSet(address newFastBridge); /// @inheritdoc IFastBridgeRouter bytes1 public constant GAS_REBATE_FLAG = 0x2A; /// @inheritdoc IFastBridgeRouter address public fastBridge; /// @inheritdoc IFastBridgeRouter address public swapQuoter; constructor(address owner_) { transferOwnership(owner_); } /// @inheritdoc IFastBridgeRouter function setFastBridge(address fastBridge_) external onlyOwner { fastBridge = fastBridge_; emit FastBridgeSet(fastBridge_); } /// @inheritdoc IFastBridgeRouter function setSwapQuoter(address swapQuoter_) external onlyOwner { swapQuoter = swapQuoter_; emit SwapQuoterSet(swapQuoter_); } /// @inheritdoc IFastBridgeRouter function bridge( address recipient, uint256 chainId, address token, uint256 amount, SwapQuery memory originQuery, SwapQuery memory destQuery ) external payable { if (originQuery.hasAdapter()) { // Perform a swap using the swap adapter, set this contract as recipient (token, amount) = _doSwap(address(this), token, amount, originQuery); } else { // Otherwise, pull the token from the user to this contract amount = _pullToken(address(this), token, amount); } IFastBridge.BridgeParams memory params = IFastBridge.BridgeParams({ dstChainId: uint32(chainId), sender: msg.sender, to: recipient, originToken: token, destToken: destQuery.tokenOut, originAmount: amount, destAmount: destQuery.minAmountOut, sendChainGas: _chainGasRequested(destQuery.rawParams), deadline: destQuery.deadline }); token.universalApproveInfinity(fastBridge, amount); uint256 msgValue = token == UniversalTokenLib.ETH_ADDRESS ? amount : 0; IFastBridge(fastBridge).bridge{value: msgValue}(params); } /// @inheritdoc IFastBridgeRouter function getOriginAmountOut( address tokenIn, address[] memory rfqTokens, uint256 amountIn ) external view returns (SwapQuery[] memory originQueries) { uint256 len = rfqTokens.length; originQueries = new SwapQuery[](len); for (uint256 i = 0; i < len; ++i) { originQueries[i] = ISwapQuoter(swapQuoter).getAmountOut( LimitedToken({actionMask: ActionLib.allActions(), token: tokenIn}), rfqTokens[i], amountIn ); // Adjust the Adapter address if it exists if (originQueries[i].hasAdapter()) { originQueries[i].routerAdapter = address(this); } } } /// @dev Checks if the explicit instruction to send gas to the destination chain was provided. function _chainGasRequested(bytes memory rawParams) internal pure returns (bool) { return rawParams.length > 0 && rawParams[0] == GAS_REBATE_FLAG; } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.17; import {DefaultAdapter} from "./adapters/DefaultAdapter.sol"; import {IRouterAdapter} from "./interfaces/IRouterAdapter.sol"; import {DeadlineExceeded, InsufficientOutputAmount, MsgValueIncorrect, TokenNotETH} from "./libs/Errors.sol"; import {Action, DefaultParams, SwapQuery} from "./libs/Structs.sol"; import {UniversalTokenLib} from "./libs/UniversalToken.sol"; import {SafeERC20, IERC20} from "@openzeppelin/contracts-4.5.0/token/ERC20/utils/SafeERC20.sol"; /// @title DefaultRouter /// @notice Base contract for all Synapse Routers, that is able to natively work with Default Pools /// due to the fact that it inherits from DefaultAdapter. abstract contract DefaultRouter is DefaultAdapter { using SafeERC20 for IERC20; using UniversalTokenLib for address; /// @dev Performs a "swap from tokenIn" following instructions from `query`. /// `query` will include the router adapter to use, and the exact type of "tokenIn -> tokenOut swap" /// should be encoded in `query.rawParams`. function _doSwap( address recipient, address tokenIn, uint256 amountIn, SwapQuery memory query ) internal returns (address tokenOut, uint256 amountOut) { // First, check the deadline for the swap // solhint-disable-next-line not-rely-on-time if (block.timestamp > query.deadline) revert DeadlineExceeded(); // Pull initial token from the user to specified router adapter amountIn = _pullToken(query.routerAdapter, tokenIn, amountIn); tokenOut = query.tokenOut; address routerAdapter = query.routerAdapter; if (routerAdapter == address(this)) { // If the router adapter is this contract, we can perform the swap directly and trust the result amountOut = _adapterSwap(recipient, tokenIn, amountIn, tokenOut, query.rawParams); } else { // Otherwise, we need to call the router adapter. Adapters are permissionless, so we verify the result // Record tokenOut balance before swap amountOut = tokenOut.universalBalanceOf(recipient); IRouterAdapter(routerAdapter).adapterSwap{value: msg.value}({ recipient: recipient, tokenIn: tokenIn, amountIn: amountIn, tokenOut: tokenOut, rawParams: query.rawParams }); // Use the difference between the recorded balance and the current balance as the amountOut amountOut = tokenOut.universalBalanceOf(recipient) - amountOut; } // Finally, check that the recipient received at least as much as they wanted if (amountOut < query.minAmountOut) revert InsufficientOutputAmount(); } /// @dev Pulls a requested token from the user to the requested recipient. /// Or, if msg.value was provided, check that ETH_ADDRESS was used and msg.value is correct. function _pullToken( address recipient, address token, uint256 amount ) internal returns (uint256 amountPulled) { if (msg.value == 0) { token.assertIsContract(); // Record token balance before transfer amountPulled = IERC20(token).balanceOf(recipient); // Token needs to be pulled only if msg.value is zero // This way user can specify WETH as the origin asset IERC20(token).safeTransferFrom(msg.sender, recipient, amount); // Use the difference between the recorded balance and the current balance as the amountPulled amountPulled = IERC20(token).balanceOf(recipient) - amountPulled; } else { // Otherwise, we need to check that ETH was specified if (token != UniversalTokenLib.ETH_ADDRESS) revert TokenNotETH(); // And that amount matches msg.value if (amount != msg.value) revert MsgValueIncorrect(); // We will forward msg.value in the external call later, if recipient is not this contract amountPulled = msg.value; } } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.17; import {TokenNotContract} from "./Errors.sol"; import {SafeERC20, IERC20} from "@openzeppelin/contracts-4.5.0/token/ERC20/utils/SafeERC20.sol"; library UniversalTokenLib { using SafeERC20 for IERC20; address internal constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; /// @notice Transfers tokens to the given account. Reverts if transfer is not successful. /// @dev This might trigger fallback, if ETH is transferred to the contract. /// Make sure this can not lead to reentrancy attacks. function universalTransfer( address token, address to, uint256 value ) internal { // Don't do anything, if need to send tokens to this address if (to == address(this)) return; if (token == ETH_ADDRESS) { /// @dev Note: this can potentially lead to executing code in `to`. // solhint-disable-next-line avoid-low-level-calls (bool success, ) = to.call{value: value}(""); require(success, "ETH transfer failed"); } else { IERC20(token).safeTransfer(to, value); } } /// @notice Issues an infinite allowance to the spender, if the current allowance is insufficient /// to spend the given amount. function universalApproveInfinity( address token, address spender, uint256 amountToSpend ) internal { // ETH Chad doesn't require your approval if (token == ETH_ADDRESS) return; // No-op if allowance is already sufficient uint256 allowance = IERC20(token).allowance(address(this), spender); if (allowance >= amountToSpend) return; // Otherwise, reset approval to 0 and set to max allowance if (allowance > 0) IERC20(token).safeApprove(spender, 0); IERC20(token).safeApprove(spender, type(uint256).max); } /// @notice Returns the balance of the given token (or native ETH) for the given account. function universalBalanceOf(address token, address account) internal view returns (uint256) { if (token == ETH_ADDRESS) { return account.balance; } else { return IERC20(token).balanceOf(account); } } /// @dev Checks that token is a contract and not ETH_ADDRESS. function assertIsContract(address token) internal view { // Check that ETH_ADDRESS was not used (in case this is a predeploy on any of the chains) if (token == UniversalTokenLib.ETH_ADDRESS) revert TokenNotContract(); // Check that token is not an EOA if (token.code.length == 0) revert TokenNotContract(); } }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.13; // "using A for B global" requires 0.8.13 or higher // ══════════════════════════════════════════ TOKEN AND POOL DESCRIPTION ═══════════════════════════════════════════════ /// @notice Struct representing a bridge token. Used as the return value in view functions. /// @param symbol Bridge token symbol: unique token ID consistent among all chains /// @param token Bridge token address struct BridgeToken { string symbol; address token; } /// @notice Struct used by IPoolHandler to represent a token in a pool /// @param index Token index in the pool /// @param token Token address struct IndexedToken { uint8 index; address token; } /// @notice Struct representing a token, and the available Actions for performing a swap. /// @param actionMask Bitmask representing what actions (see ActionLib) are available for swapping a token /// @param token Token address struct LimitedToken { uint256 actionMask; address token; } /// @notice Struct representing how pool tokens are stored by `SwapQuoter`. /// @param isWeth Whether the token represents Wrapped ETH. /// @param token Token address. struct PoolToken { bool isWeth; address token; } /// @notice Struct representing a liquidity pool. Used as the return value in view functions. /// @param pool Pool address. /// @param lpToken Address of pool's LP token. /// @param tokens List of pool's tokens. struct Pool { address pool; address lpToken; PoolToken[] tokens; } // ════════════════════════════════════════════════ ROUTER STRUCTS ═════════════════════════════════════════════════════ /// @notice Struct representing a quote request for swapping a bridge token. /// Used in destination chain's SynapseRouter, hence the name "Destination Request". /// @dev tokenOut is passed externally. /// @param symbol Bridge token symbol: unique token ID consistent among all chains /// @param amountIn Amount of bridge token to start with, before the bridge fee is applied struct DestRequest { string symbol; uint256 amountIn; } /// @notice Struct representing a swap request for SynapseRouter. /// @dev tokenIn is supplied separately. /// @param routerAdapter Contract that will perform the swap for the Router. Address(0) specifies a "no swap" query. /// @param tokenOut Token address to swap to. /// @param minAmountOut Minimum amount of tokens to receive after the swap, or tx will be reverted. /// @param deadline Latest timestamp for when the transaction needs to be executed, or tx will be reverted. /// @param rawParams ABI-encoded params for the swap that will be passed to `routerAdapter`. /// Should be DefaultParams for swaps via DefaultAdapter. struct SwapQuery { address routerAdapter; address tokenOut; uint256 minAmountOut; uint256 deadline; bytes rawParams; } using SwapQueryLib for SwapQuery global; library SwapQueryLib { /// @notice Checks whether the router adapter was specified in the query. /// Query without a router adapter specifies that no action needs to be taken. function hasAdapter(SwapQuery memory query) internal pure returns (bool) { return query.routerAdapter != address(0); } /// @notice Fills `routerAdapter` and `deadline` fields in query, if it specifies one of the supported Actions, /// and if a path for this action was found. function fillAdapterAndDeadline(SwapQuery memory query, address routerAdapter) internal pure { // Fill the fields only if some path was found. if (query.minAmountOut == 0) return; // Empty params indicates no action needs to be done, thus no adapter is needed. query.routerAdapter = query.rawParams.length == 0 ? address(0) : routerAdapter; // Set default deadline to infinity. Not using the value of 0, // which would lead to every swap to revert by default. query.deadline = type(uint256).max; } } // ════════════════════════════════════════════════ ADAPTER STRUCTS ════════════════════════════════════════════════════ /// @notice Struct representing parameters for swapping via DefaultAdapter. /// @param action Action that DefaultAdapter needs to perform. /// @param pool Liquidity pool that will be used for Swap/AddLiquidity/RemoveLiquidity actions. /// @param tokenIndexFrom Token index to swap from. Used for swap/addLiquidity actions. /// @param tokenIndexTo Token index to swap to. Used for swap/removeLiquidity actions. struct DefaultParams { Action action; address pool; uint8 tokenIndexFrom; uint8 tokenIndexTo; } /// @notice All possible actions that DefaultAdapter could perform. enum Action { Swap, // swap between two pools tokens AddLiquidity, // add liquidity in a form of a single pool token RemoveLiquidity, // remove liquidity in a form of a single pool token HandleEth // ETH <> WETH interaction } using ActionLib for Action global; /// @notice Library for dealing with bit masks which describe what set of Actions is available. library ActionLib { /// @notice Returns a bitmask with all possible actions set to True. function allActions() internal pure returns (uint256 actionMask) { actionMask = type(uint256).max; } /// @notice Returns whether the given action is set to True in the bitmask. function isIncluded(Action action, uint256 actionMask) internal pure returns (bool) { return actionMask & mask(action) != 0; } /// @notice Returns a bitmask with only the given action set to True. function mask(Action action) internal pure returns (uint256) { return 1 << uint256(action); } /// @notice Returns a bitmask with only two given actions set to True. function mask(Action a, Action b) internal pure returns (uint256) { return mask(a) | mask(b); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; // TODO: This should be pulled from the sanguine repo (requires publish and relaxing the ^0.8.20 pragma) interface IFastBridge { struct BridgeTransaction { uint32 originChainId; uint32 destChainId; address originSender; // user (origin) address destRecipient; // user (dest) address originToken; address destToken; uint256 originAmount; // amount in on origin bridge less originFeeAmount uint256 destAmount; uint256 originFeeAmount; bool sendChainGas; uint256 deadline; uint256 nonce; } struct BridgeProof { uint96 timestamp; address relayer; } // ============ Events ============ event BridgeRequested(bytes32 transactionId, address sender, bytes request); event BridgeRelayed( bytes32 transactionId, address relayer, address to, address token, uint256 amount, uint256 chainGasAmount ); event BridgeProofProvided(bytes32 transactionId, address relayer, bytes32 transactionHash); event BridgeProofDisputed(bytes32 transactionId, address relayer); event BridgeDepositClaimed(bytes32 transactionId, address relayer, address to, address token, uint256 amount); event BridgeDepositRefunded(bytes32 transactionId, address to, address token, uint256 amount); // ============ Methods ============ struct BridgeParams { uint32 dstChainId; address sender; address to; address originToken; address destToken; uint256 originAmount; // should include protocol fee (if any) uint256 destAmount; // should include relayer fee bool sendChainGas; uint256 deadline; } /// @notice Initiates bridge on origin chain to be relayed by off-chain relayer /// @param params The parameters required to bridge function bridge(BridgeParams memory params) external payable; /// @notice Relays destination side of bridge transaction by off-chain relayer /// @param request The encoded bridge transaction to relay on destination chain function relay(bytes memory request) external payable; /// @notice Provides proof on origin side that relayer provided funds on destination side of bridge transaction /// @param request The encoded bridge transaction to prove on origin chain /// @param destTxHash The destination tx hash proving bridge transaction was relayed function prove(bytes memory request, bytes32 destTxHash) external; /// @notice Completes bridge transaction on origin chain by claiming originally deposited capital /// @param request The encoded bridge transaction to claim on origin chain /// @param to The recipient address of the funds function claim(bytes memory request, address to) external; /// @notice Disputes an outstanding proof in case relayer provided dest chain tx is invalid /// @param transactionId The transaction id associated with the encoded bridge transaction to dispute function dispute(bytes32 transactionId) external; /// @notice Refunds an outstanding bridge transaction in case optimistic bridging failed /// @param request The encoded bridge transaction to refund /// @param to The recipient address of the funds function refund(bytes memory request, address to) external; // ============ Views ============ /// @notice Decodes bridge request into a bridge transaction /// @param request The bridge request to decode function getBridgeTransaction(bytes memory request) external pure returns (BridgeTransaction memory); /// @notice Checks if the dispute period has passed so bridge deposit can be claimed /// @param transactionId The transaction id associated with the encoded bridge transaction to check /// @param relayer The address of the relayer attempting to claim function canClaim(bytes32 transactionId, address relayer) external view returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import {SwapQuery} from "../../router/libs/Structs.sol"; interface IFastBridgeRouter { /// @notice Sets the address of the FastBridge contract /// @dev This function is only callable by the owner /// @param fastBridge_ The address of the FastBridge contract function setFastBridge(address fastBridge_) external; /// @notice Sets the address of the SwapQuoter contract /// @dev This function is only callable by the owner /// @param swapQuoter_ The address of the SwapQuoter contract function setSwapQuoter(address swapQuoter_) external; /// @notice Initiate an RFQ transaction with an optional swap on origin chain, /// and an optional gas rebate on destination chain. /// @dev Note that method is payable. /// If token is ETH_ADDRESS, this method should be invoked with `msg.value = amountIn`. /// If token is ERC20, the tokens will be pulled from msg.sender (use `msg.value = 0`). /// Make sure to approve this contract for spending `token` beforehand. /// /// `originQuery` is supposed to be fetched using FastBridgeRouter.getOriginAmountOut(). /// Alternatively one could use an external adapter for more complex swaps on the origin chain. /// `destQuery.rawParams` signals whether the user wants to receive a gas rebate on the destination chain: /// - If the first byte of `destQuery.rawParams` is GAS_REBATE_FLAG, the user wants to receive a gas rebate. /// - Otherwise, the user does not want to receive a gas rebate. /// /// Cross-chain RFQ swap will be performed between tokens: `originQuery.tokenOut` and `destQuery.tokenOut`. /// Note: both tokens could be ETH_ADDRESS or ERC20. /// Full proceeds of the origin swap are considered the bid for the cross-chain swap. /// `destQuery.minAmountOut` is considered the ask for the cross-chain swap. /// Note: applying slippage to `destQuery.minAmountOut` will result in a worse price for the user, /// the full Relayer quote should be used instead. /// @param recipient Address to receive tokens on destination chain /// @param chainId Destination chain id /// @param token Initial token to be pulled from the user /// @param amount Amount of the initial tokens to be pulled from the user /// @param originQuery Origin swap query (see above) /// @param destQuery Destination swap query (see above) function bridge( address recipient, uint256 chainId, address token, uint256 amount, SwapQuery memory originQuery, SwapQuery memory destQuery ) external payable; // ═══════════════════════════════════════════════════ VIEWS ═══════════════════════════════════════════════════════ /// @notice Finds the best path between `tokenIn` and every RFQ token from the given list, /// treating the swap as "origin swap", without putting any restrictions on the swap. /// @dev Check (query.minAmountOut != 0): this is true only if the swap is possible. /// The returned queries with minAmountOut != 0 could be used as `originQuery` with FastBridgeRouter. /// Note: it is possible to form a SwapQuery off-chain using alternative SwapAdapter for the origin swap. /// @param tokenIn Initial token that user wants to bridge/swap /// @param rfqTokens List of RFQ tokens /// @param amountIn Amount of tokens user wants to bridge/swap /// @return originQueries List of structs that could be used as `originQuery` in FastBridgeRouter. /// minAmountOut and deadline fields will need to be adjusted based on the user settings. function getOriginAmountOut( address tokenIn, address[] memory rfqTokens, uint256 amountIn ) external view returns (SwapQuery[] memory originQueries); /// @notice Magic value that indicates that the user wants to receive gas rebate on the destination chain. /// This is the answer to the ultimate question of life, the universe, and everything. function GAS_REBATE_FLAG() external view returns (bytes1); /// @notice Address of the FastBridge contract, used to initiate cross-chain RFQ swaps. function fastBridge() external view returns (address); /// @notice Address of the SwapQuoter contract, used to fetch quotes for the origin swap. function swapQuoter() external view returns (address); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import {LimitedToken, SwapQuery} from "../../router/libs/Structs.sol"; interface ISwapQuoter { function getAmountOut( LimitedToken memory tokenIn, address tokenOut, uint256 amountIn ) external view returns (SwapQuery memory query); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (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 Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing 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 pragma solidity 0.8.17; import {IDefaultPool, IDefaultExtendedPool} from "../interfaces/IDefaultExtendedPool.sol"; import {IRouterAdapter} from "../interfaces/IRouterAdapter.sol"; import {IWETH9} from "../interfaces/IWETH9.sol"; import {MsgValueIncorrect, PoolNotFound, TokenAddressMismatch, TokensIdentical} from "../libs/Errors.sol"; import {Action, DefaultParams} from "../libs/Structs.sol"; import {UniversalTokenLib} from "../libs/UniversalToken.sol"; import {SafeERC20, IERC20} from "@openzeppelin/contracts-4.5.0/token/ERC20/utils/SafeERC20.sol"; contract DefaultAdapter is IRouterAdapter { using SafeERC20 for IERC20; using UniversalTokenLib for address; /// @notice Enable this contract to receive Ether when withdrawing from WETH. /// @dev Consider implementing rescue functions to withdraw Ether from this contract. receive() external payable {} /// @inheritdoc IRouterAdapter function adapterSwap( address recipient, address tokenIn, uint256 amountIn, address tokenOut, bytes memory rawParams ) external payable returns (uint256 amountOut) { return _adapterSwap(recipient, tokenIn, amountIn, tokenOut, rawParams); } /// @dev Internal logic for doing a tokenIn -> tokenOut swap. /// Note: `tokenIn` is assumed to have already been transferred to this contract. function _adapterSwap( address recipient, address tokenIn, uint256 amountIn, address tokenOut, bytes memory rawParams ) internal virtual returns (uint256 amountOut) { // We define a few phases for the whole Adapter's swap process. // (?) means the phase is optional. // (!) means the phase is mandatory. // PHASE 0(!): CHECK ALL THE PARAMS DefaultParams memory params = _checkParams(tokenIn, tokenOut, rawParams); // PHASE 1(?): WRAP RECEIVED ETH INTO WETH tokenIn = _wrapReceivedETH(tokenIn, amountIn, tokenOut, params); // After PHASE 1 this contract has `amountIn` worth of `tokenIn`, tokenIn != ETH_ADDRESS // PHASE 2(?): PREPARE TO UNWRAP SWAPPED WETH address tokenSwapTo = _deriveTokenSwapTo(tokenIn, tokenOut, params); // We need to perform tokenIn -> tokenSwapTo action in PHASE 3. // if tokenOut == ETH_ADDRESS, we need to unwrap WETH in PHASE 4. // Recipient will receive `tokenOut` in PHASE 5. // PHASE 3(?): PERFORM A REQUESTED SWAP amountOut = _performPoolAction(tokenIn, amountIn, tokenSwapTo, params); // After PHASE 3 this contract has `amountOut` worth of `tokenSwapTo`, tokenSwapTo != ETH_ADDRESS // PHASE 4(?): UNWRAP SWAPPED WETH // Check if the final token is native ETH if (tokenOut == UniversalTokenLib.ETH_ADDRESS) { // PHASE 2: WETH address was stored as `tokenSwapTo` _unwrapETH(tokenSwapTo, amountOut); } // PHASE 5(!): TRANSFER SWAPPED TOKENS TO RECIPIENT // Note: this will transfer native ETH, if tokenOut == ETH_ADDRESS // Note: this is a no-op if recipient == address(this) tokenOut.universalTransfer(recipient, amountOut); } /// @dev Checks the params and decodes them into a struct. function _checkParams( address tokenIn, address tokenOut, bytes memory rawParams ) internal pure returns (DefaultParams memory params) { if (tokenIn == tokenOut) revert TokensIdentical(); // Decode params for swapping via a Default pool params = abi.decode(rawParams, (DefaultParams)); // Swap pool should exist, if action other than HandleEth was requested if (params.pool == address(0) && params.action != Action.HandleEth) revert PoolNotFound(); } /// @dev Wraps native ETH into WETH, if requested. /// Returns the address of the token this contract ends up with. function _wrapReceivedETH( address tokenIn, uint256 amountIn, address tokenOut, DefaultParams memory params ) internal returns (address wrappedTokenIn) { // tokenIn was already transferred to this contract, check if we start from native ETH if (tokenIn == UniversalTokenLib.ETH_ADDRESS) { // Determine WETH address: this is either tokenOut (if no swap is needed), // or a pool token with index `tokenIndexFrom` (if swap is needed). wrappedTokenIn = _deriveWethAddress({token: tokenOut, params: params, isTokenFromWeth: true}); // Wrap ETH into WETH and leave it in this contract _wrapETH(wrappedTokenIn, amountIn); } else { wrappedTokenIn = tokenIn; // For ERC20 tokens msg.value should be zero if (msg.value != 0) revert MsgValueIncorrect(); } } /// @dev Derives the address of token to be received after an action defined in `params`. function _deriveTokenSwapTo( address tokenIn, address tokenOut, DefaultParams memory params ) internal view returns (address tokenSwapTo) { // Check if swap to native ETH was requested if (tokenOut == UniversalTokenLib.ETH_ADDRESS) { // Determine WETH address: this is either tokenIn (if no swap is needed), // or a pool token with index `tokenIndexTo` (if swap is needed). tokenSwapTo = _deriveWethAddress({token: tokenIn, params: params, isTokenFromWeth: false}); } else { tokenSwapTo = tokenOut; } } /// @dev Performs an action defined in `params` and returns the amount of `tokenSwapTo` received. function _performPoolAction( address tokenIn, uint256 amountIn, address tokenSwapTo, DefaultParams memory params ) internal returns (uint256 amountOut) { // Determine if we need to perform a swap if (params.action == Action.HandleEth) { // If no swap is required, amountOut doesn't change amountOut = amountIn; } else { // Record balance before the swap amountOut = IERC20(tokenSwapTo).balanceOf(address(this)); // Approve the pool for spending exactly `amountIn` of `tokenIn` IERC20(tokenIn).safeIncreaseAllowance(params.pool, amountIn); if (params.action == Action.Swap) { _swap(params.pool, params, amountIn, tokenSwapTo); } else if (params.action == Action.AddLiquidity) { _addLiquidity(params.pool, params, amountIn, tokenSwapTo); } else { // The only remaining action is RemoveLiquidity _removeLiquidity(params.pool, params, amountIn, tokenSwapTo); } // Use the difference between the balance after the swap and the recorded balance as `amountOut` amountOut = IERC20(tokenSwapTo).balanceOf(address(this)) - amountOut; } } // ═══════════════════════════════════════ INTERNAL LOGIC: SWAP ACTIONS ════════════════════════════════════════════ /// @dev Performs a swap through the given pool. /// Note: The pool should be already approved for spending `tokenIn`. function _swap( address pool, DefaultParams memory params, uint256 amountIn, address tokenOut ) internal { // tokenOut should match the "swap to" token if (IDefaultPool(pool).getToken(params.tokenIndexTo) != tokenOut) revert TokenAddressMismatch(); // amountOut and deadline are not checked in RouterAdapter IDefaultPool(pool).swap({ tokenIndexFrom: params.tokenIndexFrom, tokenIndexTo: params.tokenIndexTo, dx: amountIn, minDy: 0, deadline: type(uint256).max }); } /// @dev Adds liquidity in a form of a single token to the given pool. /// Note: The pool should be already approved for spending `tokenIn`. function _addLiquidity( address pool, DefaultParams memory params, uint256 amountIn, address tokenOut ) internal { uint256 numTokens = _getPoolNumTokens(pool); address lpToken = _getPoolLPToken(pool); // tokenOut should match the LP token if (lpToken != tokenOut) revert TokenAddressMismatch(); uint256[] memory amounts = new uint256[](numTokens); amounts[params.tokenIndexFrom] = amountIn; // amountOut and deadline are not checked in RouterAdapter IDefaultExtendedPool(pool).addLiquidity({amounts: amounts, minToMint: 0, deadline: type(uint256).max}); } /// @dev Removes liquidity in a form of a single token from the given pool. /// Note: The pool should be already approved for spending `tokenIn`. function _removeLiquidity( address pool, DefaultParams memory params, uint256 amountIn, address tokenOut ) internal { // tokenOut should match the "swap to" token if (IDefaultPool(pool).getToken(params.tokenIndexTo) != tokenOut) revert TokenAddressMismatch(); // amountOut and deadline are not checked in RouterAdapter IDefaultExtendedPool(pool).removeLiquidityOneToken({ tokenAmount: amountIn, tokenIndex: params.tokenIndexTo, minAmount: 0, deadline: type(uint256).max }); } // ═════════════════════════════════════════ INTERNAL LOGIC: POOL LENS ═════════════════════════════════════════════ /// @dev Returns the LP token address of the given pool. function _getPoolLPToken(address pool) internal view returns (address lpToken) { (, , , , , , lpToken) = IDefaultExtendedPool(pool).swapStorage(); } /// @dev Returns the number of tokens in the given pool. function _getPoolNumTokens(address pool) internal view returns (uint256 numTokens) { // Iterate over all tokens in the pool until the end is reached for (uint8 index = 0; ; ++index) { try IDefaultPool(pool).getToken(index) returns (address) {} catch { // End of pool reached numTokens = index; break; } } } /// @dev Returns the tokens in the given pool. function _getPoolTokens(address pool) internal view returns (address[] memory tokens) { uint256 numTokens = _getPoolNumTokens(pool); tokens = new address[](numTokens); for (uint8 i = 0; i < numTokens; ++i) { // This will not revert because we already know the number of tokens in the pool tokens[i] = IDefaultPool(pool).getToken(i); } } /// @dev Returns the quote for a swap through the given pool. /// Note: will return 0 on invalid swaps. function _getPoolSwapQuote( address pool, uint8 tokenIndexFrom, uint8 tokenIndexTo, uint256 amountIn ) internal view returns (uint256 amountOut) { try IDefaultPool(pool).calculateSwap(tokenIndexFrom, tokenIndexTo, amountIn) returns (uint256 dy) { amountOut = dy; } catch { // Return 0 instead of reverting amountOut = 0; } } // ════════════════════════════════════════ INTERNAL LOGIC: ETH <> WETH ════════════════════════════════════════════ /// @dev Wraps ETH into WETH. function _wrapETH(address weth, uint256 amount) internal { if (amount != msg.value) revert MsgValueIncorrect(); // Deposit in order to have WETH in this contract IWETH9(weth).deposit{value: amount}(); } /// @dev Unwraps WETH into ETH. function _unwrapETH(address weth, uint256 amount) internal { // Withdraw ETH to this contract IWETH9(weth).withdraw(amount); } /// @dev Derives WETH address from swap parameters. function _deriveWethAddress( address token, DefaultParams memory params, bool isTokenFromWeth ) internal view returns (address weth) { if (params.action == Action.HandleEth) { // If we only need to wrap/unwrap ETH, WETH address should be specified as the other token weth = token; } else { // Otherwise, we need to get WETH address from the liquidity pool weth = address( IDefaultPool(params.pool).getToken(isTokenFromWeth ? params.tokenIndexFrom : params.tokenIndexTo) ); } } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.17; interface IRouterAdapter { /// @notice Performs a tokenIn -> tokenOut swap, according to the provided params. /// If tokenIn is ETH_ADDRESS, this method should be invoked with `msg.value = amountIn`. /// If tokenIn is ERC20, the tokens should be already transferred to this contract (using `msg.value = 0`). /// If tokenOut is ETH_ADDRESS, native ETH will be sent to the recipient (be aware of potential reentrancy). /// If tokenOut is ERC20, the tokens will be transferred to the recipient. /// @dev Contracts implementing {IRouterAdapter} interface are required to enforce the above restrictions. /// On top of that, they must ensure that exactly `amountOut` worth of `tokenOut` is transferred to the recipient. /// Swap deadline and slippage is checked outside of this contract. /// @param recipient Address to receive the swapped token /// @param tokenIn Token to sell (use ETH_ADDRESS to start from native ETH) /// @param amountIn Amount of tokens to sell /// @param tokenOut Token to buy (use ETH_ADDRESS to end with native ETH) /// @param rawParams Additional swap parameters /// @return amountOut Amount of bought tokens function adapterSwap( address recipient, address tokenIn, uint256 amountIn, address tokenOut, bytes calldata rawParams ) external payable returns (uint256 amountOut); }
// SPDX-License-Identifier: MIT pragma solidity 0.8.17; error DeadlineExceeded(); error InsufficientOutputAmount(); error MsgValueIncorrect(); error PoolNotFound(); error TokenAddressMismatch(); error TokenNotContract(); error TokenNotETH(); error TokensIdentical();
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; import "../IERC20.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; function safeTransfer( IERC20 token, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } 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)); } function safeIncreaseAllowance( IERC20 token, address spender, uint256 value ) internal { uint256 newAllowance = token.allowance(address(this), spender) + value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } 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"); uint256 newAllowance = oldAllowance - value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } } /** * @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"); if (returndata.length > 0) { // Return data is optional require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } }
// 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; } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.17; import {IDefaultPool} from "./IDefaultPool.sol"; interface IDefaultExtendedPool is IDefaultPool { function addLiquidity( uint256[] calldata amounts, uint256 minToMint, uint256 deadline ) external returns (uint256); function removeLiquidityOneToken( uint256 tokenAmount, uint8 tokenIndex, uint256 minAmount, uint256 deadline ) external returns (uint256); // ═══════════════════════════════════════════════════ VIEWS ═══════════════════════════════════════════════════════ function calculateRemoveLiquidity(uint256 amount) external view returns (uint256[] memory); function calculateRemoveLiquidityOneToken(uint256 tokenAmount, uint8 tokenIndex) external view returns (uint256 availableTokenAmount); function getAPrecise() external view returns (uint256); function getTokenBalance(uint8 index) external view returns (uint256); function swapStorage() external view returns ( uint256 initialA, uint256 futureA, uint256 initialATime, uint256 futureATime, uint256 swapFee, uint256 adminFee, address lpToken ); }
// SPDX-License-Identifier: MIT pragma solidity 0.8.17; interface IWETH9 { function deposit() external payable; function withdraw(uint256 wad) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @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); /** * @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); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (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 * ==== * * [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://diligence.consensys.net/posts/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/v0.5.11/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 functionCall(target, data, "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"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(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) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(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) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason 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 { // 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 assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.17; interface IDefaultPool { function swap( uint8 tokenIndexFrom, uint8 tokenIndexTo, uint256 dx, uint256 minDy, uint256 deadline ) external returns (uint256 amountOut); function calculateSwap( uint8 tokenIndexFrom, uint8 tokenIndexTo, uint256 dx ) external view returns (uint256 amountOut); function getToken(uint8 index) external view returns (address token); }
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Contract Security Audit
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[{"inputs":[{"internalType":"address","name":"owner_","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"DeadlineExceeded","type":"error"},{"inputs":[],"name":"InsufficientOutputAmount","type":"error"},{"inputs":[],"name":"MsgValueIncorrect","type":"error"},{"inputs":[],"name":"PoolNotFound","type":"error"},{"inputs":[],"name":"TokenAddressMismatch","type":"error"},{"inputs":[],"name":"TokenNotContract","type":"error"},{"inputs":[],"name":"TokenNotETH","type":"error"},{"inputs":[],"name":"TokensIdentical","type":"error"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"newFastBridge","type":"address"}],"name":"FastBridgeSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"newSwapQuoter","type":"address"}],"name":"SwapQuoterSet","type":"event"},{"inputs":[],"name":"GAS_REBATE_FLAG","outputs":[{"internalType":"bytes1","name":"","type":"bytes1"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"address","name":"tokenIn","type":"address"},{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"address","name":"tokenOut","type":"address"},{"internalType":"bytes","name":"rawParams","type":"bytes"}],"name":"adapterSwap","outputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"chainId","type":"uint256"},{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"components":[{"internalType":"address","name":"routerAdapter","type":"address"},{"internalType":"address","name":"tokenOut","type":"address"},{"internalType":"uint256","name":"minAmountOut","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"bytes","name":"rawParams","type":"bytes"}],"internalType":"struct SwapQuery","name":"originQuery","type":"tuple"},{"components":[{"internalType":"address","name":"routerAdapter","type":"address"},{"internalType":"address","name":"tokenOut","type":"address"},{"internalType":"uint256","name":"minAmountOut","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"bytes","name":"rawParams","type":"bytes"}],"internalType":"struct SwapQuery","name":"destQuery","type":"tuple"}],"name":"bridge","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"fastBridge","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"tokenIn","type":"address"},{"internalType":"address[]","name":"rfqTokens","type":"address[]"},{"internalType":"uint256","name":"amountIn","type":"uint256"}],"name":"getOriginAmountOut","outputs":[{"components":[{"internalType":"address","name":"routerAdapter","type":"address"},{"internalType":"address","name":"tokenOut","type":"address"},{"internalType":"uint256","name":"minAmountOut","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"bytes","name":"rawParams","type":"bytes"}],"internalType":"struct SwapQuery[]","name":"originQueries","type":"tuple[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"fastBridge_","type":"address"}],"name":"setFastBridge","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"swapQuoter_","type":"address"}],"name":"setSwapQuoter","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"swapQuoter","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
0000000000000000000000000fea3e5840334fc758a3decf14546bfdfbef5cd3
-----Decoded View---------------
Arg [0] : owner_ (address): 0x0fea3e5840334Fc758A3DECf14546bFdfBef5cd3
-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000000fea3e5840334fc758a3decf14546bfdfbef5cd3
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.