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Overview
ETH Balance
1.64071796048920313 ETH
Eth Value
$5,354.04 (@ $3,263.23/ETH)Token Holdings
More Info
Private Name Tags
ContractCreator
Latest 25 from a total of 74,793 transactions
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Prove | 21463374 | 18 mins ago | IN | 0 ETH | 0.00022306 | ||||
Relay | 21463372 | 18 mins ago | IN | 0 ETH | 0.00043791 | ||||
Claim | 21463330 | 27 mins ago | IN | 0 ETH | 0.00023023 | ||||
Claim | 21463303 | 32 mins ago | IN | 0 ETH | 0.00028457 | ||||
Relay | 21463298 | 33 mins ago | IN | 0.01968247 ETH | 0.00042975 | ||||
Prove | 21463177 | 57 mins ago | IN | 0 ETH | 0.00022466 | ||||
Prove | 21463146 | 1 hr ago | IN | 0 ETH | 0.00026397 | ||||
Claim | 21463101 | 1 hr ago | IN | 0 ETH | 0.00019523 | ||||
Relay | 21463035 | 1 hr ago | IN | 0.11963094 ETH | 0.00031099 | ||||
Claim | 21463014 | 1 hr ago | IN | 0 ETH | 0.00018258 | ||||
Prove | 21462950 | 1 hr ago | IN | 0 ETH | 0.0002824 | ||||
Relay | 21462933 | 1 hr ago | IN | 0.00083769 ETH | 0.00033535 | ||||
Relay | 21462872 | 1 hr ago | IN | 0.02089251 ETH | 0.00042335 | ||||
Prove | 21462860 | 2 hrs ago | IN | 0 ETH | 0.00023082 | ||||
Relay | 21462771 | 2 hrs ago | IN | 0.17958339 ETH | 0.00032516 | ||||
Claim | 21462740 | 2 hrs ago | IN | 0 ETH | 0.00023506 | ||||
Claim | 21462652 | 2 hrs ago | IN | 0 ETH | 0.00028717 | ||||
Prove | 21462584 | 2 hrs ago | IN | 0 ETH | 0.00025221 | ||||
Relay | 21462584 | 2 hrs ago | IN | 0 ETH | 0.00049953 | ||||
Relay | 21462501 | 3 hrs ago | IN | 0.00133678 ETH | 0.00066267 | ||||
Prove | 21462497 | 3 hrs ago | IN | 0 ETH | 0.00055528 | ||||
Relay | 21462436 | 3 hrs ago | IN | 0 ETH | 0.00070062 | ||||
Relay | 21462408 | 3 hrs ago | IN | 0 ETH | 0.00049129 | ||||
Claim | 21462354 | 3 hrs ago | IN | 0 ETH | 0.00029154 | ||||
Claim | 21462354 | 3 hrs ago | IN | 0 ETH | 0.00029149 |
Latest 25 internal transactions (View All)
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21463330 | 27 mins ago | 0.294 ETH | ||||
21463298 | 33 mins ago | 0.01968247 ETH | ||||
21463172 | 58 mins ago | 0.294 ETH | ||||
21463101 | 1 hr ago | 0.15 ETH | ||||
21463035 | 1 hr ago | 0.11963094 ETH | ||||
21463014 | 1 hr ago | 0.69 ETH | ||||
21462943 | 1 hr ago | 0.15 ETH | ||||
21462933 | 1 hr ago | 0.00083769 ETH | ||||
21462872 | 1 hr ago | 0.02089251 ETH | ||||
21462859 | 2 hrs ago | 0.69 ETH | ||||
21462771 | 2 hrs ago | 0.17958339 ETH | ||||
21462740 | 2 hrs ago | 0.01 ETH | ||||
21462578 | 2 hrs ago | 0.01 ETH | ||||
21462501 | 3 hrs ago | 0.00133678 ETH | ||||
21462243 | 4 hrs ago | 0.99958016 ETH | ||||
21462196 | 4 hrs ago | 0.00243506 ETH | ||||
21462196 | 4 hrs ago | 0.00156495 ETH | ||||
21462167 | 4 hrs ago | 0.006 ETH | ||||
21462165 | 4 hrs ago | 0.01556209 ETH | ||||
21462144 | 4 hrs ago | 0.09541798 ETH | ||||
21462047 | 4 hrs ago | 0.25 ETH | ||||
21462036 | 4 hrs ago | 0.00156495 ETH | ||||
21462005 | 4 hrs ago | 0.006 ETH | ||||
21461994 | 4 hrs ago | 0.00243506 ETH | ||||
21461978 | 4 hrs ago | 0.09541798 ETH |
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Contract Name:
FastBridge
Compiler Version
v0.8.20+commit.a1b79de6
Optimization Enabled:
Yes with 200 runs
Other Settings:
paris EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity 0.8.20; import {SafeERC20, IERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "./libs/Errors.sol"; import {UniversalTokenLib} from "./libs/UniversalToken.sol"; import {Admin} from "./Admin.sol"; import {IFastBridge} from "./interfaces/IFastBridge.sol"; contract FastBridge is IFastBridge, Admin { using SafeERC20 for IERC20; using UniversalTokenLib for address; /// @notice Dispute period for relayed transactions uint256 public constant DISPUTE_PERIOD = 30 minutes; /// @notice Delay for a transaction after which it could be permisionlessly refunded uint256 public constant REFUND_DELAY = 7 days; /// @notice Minimum deadline period to relay a requested bridge transaction uint256 public constant MIN_DEADLINE_PERIOD = 30 minutes; enum BridgeStatus { NULL, // doesn't exist yet REQUESTED, RELAYER_PROVED, RELAYER_CLAIMED, REFUNDED } /// @notice Status of the bridge tx on origin chain mapping(bytes32 => BridgeStatus) public bridgeStatuses; /// @notice Proof of relayed bridge tx on origin chain mapping(bytes32 => BridgeProof) public bridgeProofs; /// @notice Whether bridge has been relayed on destination chain mapping(bytes32 => bool) public bridgeRelays; /// @dev to prevent replays uint256 public nonce; // @dev the block the contract was deployed at uint256 public immutable deployBlock; constructor(address _owner) Admin(_owner) { deployBlock = block.number; } /// @notice Pulls a requested token from the user to the requested recipient. /// @dev Be careful of re-entrancy issues when msg.value > 0 and recipient != address(this) function _pullToken(address recipient, address token, uint256 amount) internal returns (uint256 amountPulled) { if (token != UniversalTokenLib.ETH_ADDRESS) { 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 amount matches msg.value if (amount != msg.value) revert MsgValueIncorrect(); // Transfer value to recipient if not this address if (recipient != address(this)) token.universalTransfer(recipient, amount); // We will forward msg.value in the external call later, if recipient is not this contract amountPulled = msg.value; } } /// @inheritdoc IFastBridge function getBridgeTransaction(bytes memory request) public pure returns (BridgeTransaction memory) { return abi.decode(request, (BridgeTransaction)); } /// @inheritdoc IFastBridge function bridge(BridgeParams memory params) external payable { // check bridge params if (params.dstChainId == block.chainid) revert ChainIncorrect(); if (params.originAmount == 0 || params.destAmount == 0) revert AmountIncorrect(); if (params.originToken == address(0) || params.destToken == address(0)) revert ZeroAddress(); if (params.deadline < block.timestamp + MIN_DEADLINE_PERIOD) revert DeadlineTooShort(); // transfer tokens to bridge contract // @dev use returned originAmount in request in case of transfer fees uint256 originAmount = _pullToken(address(this), params.originToken, params.originAmount); // track amount of origin token owed to protocol uint256 originFeeAmount; if (protocolFeeRate > 0) originFeeAmount = (originAmount * protocolFeeRate) / FEE_BPS; originAmount -= originFeeAmount; // remove from amount used in request as not relevant for relayers // set status to requested bytes memory request = abi.encode( BridgeTransaction({ originChainId: uint32(block.chainid), destChainId: params.dstChainId, originSender: params.sender, destRecipient: params.to, originToken: params.originToken, destToken: params.destToken, originAmount: originAmount, destAmount: params.destAmount, originFeeAmount: originFeeAmount, sendChainGas: params.sendChainGas, deadline: params.deadline, nonce: nonce++ // increment nonce on every bridge }) ); bytes32 transactionId = keccak256(request); bridgeStatuses[transactionId] = BridgeStatus.REQUESTED; emit BridgeRequested( transactionId, params.sender, request, params.dstChainId, params.originToken, params.destToken, originAmount, params.destAmount, params.sendChainGas ); } /// @inheritdoc IFastBridge function relay(bytes memory request) external payable onlyRole(RELAYER_ROLE) { bytes32 transactionId = keccak256(request); BridgeTransaction memory transaction = getBridgeTransaction(request); if (transaction.destChainId != uint32(block.chainid)) revert ChainIncorrect(); // check haven't exceeded deadline for relay to happen if (block.timestamp > transaction.deadline) revert DeadlineExceeded(); // mark bridge transaction as relayed if (bridgeRelays[transactionId]) revert TransactionRelayed(); bridgeRelays[transactionId] = true; // transfer tokens to recipient on destination chain and gas rebate if requested address to = transaction.destRecipient; address token = transaction.destToken; uint256 amount = transaction.destAmount; uint256 rebate = chainGasAmount; if (!transaction.sendChainGas) { // forward erc20 rebate = 0; _pullToken(to, token, amount); } else if (token == UniversalTokenLib.ETH_ADDRESS) { // lump in gas rebate into amount in native gas token _pullToken(to, token, amount + rebate); } else { // forward erc20 then forward gas rebate in native gas token _pullToken(to, token, amount); _pullToken(to, UniversalTokenLib.ETH_ADDRESS, rebate); } emit BridgeRelayed( transactionId, msg.sender, to, transaction.originChainId, transaction.originToken, transaction.destToken, transaction.originAmount, transaction.destAmount, rebate ); } /// @inheritdoc IFastBridge function prove(bytes memory request, bytes32 destTxHash) external onlyRole(RELAYER_ROLE) { bytes32 transactionId = keccak256(request); // update bridge tx status given proof provided if (bridgeStatuses[transactionId] != BridgeStatus.REQUESTED) revert StatusIncorrect(); bridgeStatuses[transactionId] = BridgeStatus.RELAYER_PROVED; bridgeProofs[transactionId] = BridgeProof({timestamp: uint96(block.timestamp), relayer: msg.sender}); // overflow ok emit BridgeProofProvided(transactionId, msg.sender, destTxHash); } /// @notice Calculates time since proof submitted /// @dev proof.timestamp stores casted uint96(block.timestamp) block timestamps for gas optimization /// _timeSince(proof) can accomodate rollover case when block.timestamp > type(uint96).max but /// proof.timestamp < type(uint96).max via unchecked statement /// @param proof The bridge proof /// @return delta Time delta since proof submitted function _timeSince(BridgeProof memory proof) internal view returns (uint256 delta) { unchecked { delta = uint96(block.timestamp) - proof.timestamp; } } /// @inheritdoc IFastBridge function canClaim(bytes32 transactionId, address relayer) external view returns (bool) { if (bridgeStatuses[transactionId] != BridgeStatus.RELAYER_PROVED) revert StatusIncorrect(); BridgeProof memory proof = bridgeProofs[transactionId]; if (proof.relayer != relayer) revert SenderIncorrect(); return _timeSince(proof) > DISPUTE_PERIOD; } /// @inheritdoc IFastBridge function claim(bytes memory request, address to) external onlyRole(RELAYER_ROLE) { bytes32 transactionId = keccak256(request); BridgeTransaction memory transaction = getBridgeTransaction(request); // update bridge tx status if able to claim origin collateral if (bridgeStatuses[transactionId] != BridgeStatus.RELAYER_PROVED) revert StatusIncorrect(); BridgeProof memory proof = bridgeProofs[transactionId]; if (proof.relayer != msg.sender) revert SenderIncorrect(); if (_timeSince(proof) <= DISPUTE_PERIOD) revert DisputePeriodNotPassed(); bridgeStatuses[transactionId] = BridgeStatus.RELAYER_CLAIMED; // update protocol fees if origin fee amount exists if (transaction.originFeeAmount > 0) protocolFees[transaction.originToken] += transaction.originFeeAmount; // transfer origin collateral less fee to specified address address token = transaction.originToken; uint256 amount = transaction.originAmount; token.universalTransfer(to, amount); emit BridgeDepositClaimed(transactionId, msg.sender, to, token, amount); } /// @inheritdoc IFastBridge function dispute(bytes32 transactionId) external onlyRole(GUARD_ROLE) { if (bridgeStatuses[transactionId] != BridgeStatus.RELAYER_PROVED) revert StatusIncorrect(); if (_timeSince(bridgeProofs[transactionId]) > DISPUTE_PERIOD) revert DisputePeriodPassed(); // @dev relayer gets slashed effectively if dest relay has gone thru bridgeStatuses[transactionId] = BridgeStatus.REQUESTED; delete bridgeProofs[transactionId]; emit BridgeProofDisputed(transactionId, msg.sender); } /// @inheritdoc IFastBridge function refund(bytes memory request) external { bytes32 transactionId = keccak256(request); BridgeTransaction memory transaction = getBridgeTransaction(request); if (hasRole(REFUNDER_ROLE, msg.sender)) { // Refunder can refund if deadline has passed if (block.timestamp <= transaction.deadline) revert DeadlineNotExceeded(); } else { // Permissionless refund is allowed after REFUND_DELAY if (block.timestamp <= transaction.deadline + REFUND_DELAY) revert DeadlineNotExceeded(); } // set status to refunded if still in requested state if (bridgeStatuses[transactionId] != BridgeStatus.REQUESTED) revert StatusIncorrect(); bridgeStatuses[transactionId] = BridgeStatus.REFUNDED; // transfer origin collateral back to original sender address to = transaction.originSender; address token = transaction.originToken; uint256 amount = transaction.originAmount + transaction.originFeeAmount; token.universalTransfer(to, amount); emit BridgeDepositRefunded(transactionId, to, token, amount); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.20; import {IERC20} from "../IERC20.sol"; import {IERC20Permit} from "../extensions/IERC20Permit.sol"; import {Address} from "../../../utils/Address.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC-20 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 An operation with an ERC-20 token failed. */ error SafeERC20FailedOperation(address token); /** * @dev Indicates a failed `decreaseAllowance` request. */ error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease); /** * @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.encodeCall(token.transfer, (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.encodeCall(token.transferFrom, (from, to, 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); forceApprove(token, spender, oldAllowance + value); } /** * @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no * value, non-reverting calls are assumed to be successful. */ function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal { unchecked { uint256 currentAllowance = token.allowance(address(this), spender); if (currentAllowance < requestedDecrease) { revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease); } forceApprove(token, spender, currentAllowance - requestedDecrease); } } /** * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval * to be set to zero before setting it to a non-zero value, such as USDT. */ function forceApprove(IERC20 token, address spender, uint256 value) internal { bytes memory approvalCall = abi.encodeCall(token.approve, (spender, value)); if (!_callOptionalReturnBool(token, approvalCall)) { _callOptionalReturn(token, abi.encodeCall(token.approve, (spender, 0))); _callOptionalReturn(token, approvalCall); } } /** * @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); if (returndata.length != 0 && !abi.decode(returndata, (bool))) { revert SafeERC20FailedOperation(address(token)); } } /** * @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(token).code.length > 0; } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.20; error DeadlineExceeded(); error DeadlineNotExceeded(); error DeadlineTooShort(); error InsufficientOutputAmount(); error MsgValueIncorrect(); error PoolNotFound(); error TokenAddressMismatch(); error TokenNotContract(); error TokenNotETH(); error TokensIdentical(); error ChainIncorrect(); error AmountIncorrect(); error ZeroAddress(); error DisputePeriodNotPassed(); error DisputePeriodPassed(); error SenderIncorrect(); error StatusIncorrect(); error TransactionIdIncorrect(); error TransactionRelayed();
// SPDX-License-Identifier: MIT pragma solidity 0.8.20; import {TokenNotContract} from "./Errors.sol"; import {SafeERC20, IERC20} from "@openzeppelin/contracts/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; // Don't do anything, if trying to send zero value if (value == 0) 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).safeDecreaseAllowance(spender, allowance); IERC20(token).safeIncreaseAllowance(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 0.8.20; import {AccessControlEnumerable} from "@openzeppelin/contracts/access/extensions/AccessControlEnumerable.sol"; import {UniversalTokenLib} from "./libs/UniversalToken.sol"; import {IAdmin} from "./interfaces/IAdmin.sol"; contract Admin is IAdmin, AccessControlEnumerable { using UniversalTokenLib for address; bytes32 public constant RELAYER_ROLE = keccak256("RELAYER_ROLE"); bytes32 public constant REFUNDER_ROLE = keccak256("REFUNDER_ROLE"); bytes32 public constant GUARD_ROLE = keccak256("GUARD_ROLE"); bytes32 public constant GOVERNOR_ROLE = keccak256("GOVERNOR_ROLE"); uint256 public constant FEE_BPS = 1e6; uint256 public constant FEE_RATE_MAX = 0.01e6; // max 1% on origin amount /// @notice Protocol fee rate taken on origin amount deposited in origin chain uint256 public protocolFeeRate; /// @notice Protocol fee amounts accumulated mapping(address => uint256) public protocolFees; /// @notice Chain gas amount to forward as rebate if requested uint256 public chainGasAmount; constructor(address _owner) { _grantRole(DEFAULT_ADMIN_ROLE, _owner); } function setProtocolFeeRate(uint256 newFeeRate) external onlyRole(GOVERNOR_ROLE) { require(newFeeRate <= FEE_RATE_MAX, "newFeeRate > max"); uint256 oldFeeRate = protocolFeeRate; protocolFeeRate = newFeeRate; emit FeeRateUpdated(oldFeeRate, newFeeRate); } function sweepProtocolFees(address token, address recipient) external onlyRole(GOVERNOR_ROLE) { uint256 feeAmount = protocolFees[token]; if (feeAmount == 0) return; // skip if no accumulated fees protocolFees[token] = 0; token.universalTransfer(recipient, feeAmount); emit FeesSwept(token, recipient, feeAmount); } function setChainGasAmount(uint256 newChainGasAmount) external onlyRole(GOVERNOR_ROLE) { uint256 oldChainGasAmount = chainGasAmount; chainGasAmount = newChainGasAmount; emit ChainGasAmountUpdated(oldChainGasAmount, newChainGasAmount); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; 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; // user specified deadline for destination relay uint256 nonce; } struct BridgeProof { uint96 timestamp; address relayer; } // ============ Events ============ event BridgeRequested( bytes32 indexed transactionId, address indexed sender, bytes request, uint32 destChainId, address originToken, address destToken, uint256 originAmount, uint256 destAmount, bool sendChainGas ); event BridgeRelayed( bytes32 indexed transactionId, address indexed relayer, address indexed to, uint32 originChainId, address originToken, address destToken, uint256 originAmount, uint256 destAmount, uint256 chainGasAmount ); event BridgeProofProvided(bytes32 indexed transactionId, address indexed relayer, bytes32 transactionHash); event BridgeProofDisputed(bytes32 indexed transactionId, address indexed relayer); event BridgeDepositClaimed( bytes32 indexed transactionId, address indexed relayer, address indexed to, address token, uint256 amount ); event BridgeDepositRefunded(bytes32 indexed transactionId, address indexed 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 function refund(bytes memory request) 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 // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.20; /** * @dev Interface of the ERC-20 standard as defined in the ERC. */ 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 value of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the value of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves a `value` amount of 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 value) 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 a `value` amount of tokens 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 value) external returns (bool); /** * @dev Moves a `value` amount of tokens from `from` to `to` using the * allowance mechanism. `value` 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 value) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Permit.sol) pragma solidity ^0.8.20; /** * @dev Interface of the ERC-20 Permit extension allowing approvals to be made via signatures, as defined in * https://eips.ethereum.org/EIPS/eip-2612[ERC-2612]. * * Adds the {permit} method, which can be used to change an account's ERC-20 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. * * ==== Security Considerations * * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be * considered as an intention to spend the allowance in any specific way. The second is that because permits have * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be * generally recommended is: * * ```solidity * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public { * try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {} * doThing(..., value); * } * * function doThing(..., uint256 value) public { * token.safeTransferFrom(msg.sender, address(this), value); * ... * } * ``` * * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also * {SafeERC20-safeTransferFrom}). * * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so * contracts should have entry points that don't rely on permit. */ 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]. * * CAUTION: See Security Considerations above. */ 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 v5.0.0) (utils/Address.sol) pragma solidity ^0.8.20; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev The ETH balance of the account is not enough to perform the operation. */ error AddressInsufficientBalance(address account); /** * @dev There's no code at `target` (it is not a contract). */ error AddressEmptyCode(address target); /** * @dev A call to an address target failed. The target may have reverted. */ error FailedInnerCall(); /** * @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/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { if (address(this).balance < amount) { revert AddressInsufficientBalance(address(this)); } (bool success, ) = recipient.call{value: amount}(""); if (!success) { revert FailedInnerCall(); } } /** * @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 or custom error, it is bubbled * up by this function (like regular Solidity function calls). However, if * the call reverted with no returned reason, this function reverts with a * {FailedInnerCall} error. * * 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. */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0); } /** * @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`. */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { if (address(this).balance < value) { revert AddressInsufficientBalance(address(this)); } (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and reverts if the target * was not a contract or bubbling up the revert reason (falling back to {FailedInnerCall}) in case of an * unsuccessful call. */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata ) internal view returns (bytes memory) { if (!success) { _revert(returndata); } else { // only check if target is a contract if the call was successful and the return data is empty // otherwise we already know that it was a contract if (returndata.length == 0 && target.code.length == 0) { revert AddressEmptyCode(target); } return returndata; } } /** * @dev Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the * revert reason or with a default {FailedInnerCall} error. */ function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) { if (!success) { _revert(returndata); } else { return returndata; } } /** * @dev Reverts with returndata if present. Otherwise reverts with {FailedInnerCall}. */ function _revert(bytes memory returndata) 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 FailedInnerCall(); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (access/extensions/AccessControlEnumerable.sol) pragma solidity ^0.8.20; import {IAccessControlEnumerable} from "./IAccessControlEnumerable.sol"; import {AccessControl} from "../AccessControl.sol"; import {EnumerableSet} from "../../utils/structs/EnumerableSet.sol"; /** * @dev Extension of {AccessControl} that allows enumerating the members of each role. */ abstract contract AccessControlEnumerable is IAccessControlEnumerable, AccessControl { using EnumerableSet for EnumerableSet.AddressSet; mapping(bytes32 role => EnumerableSet.AddressSet) private _roleMembers; /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IAccessControlEnumerable).interfaceId || super.supportsInterface(interfaceId); } /** * @dev Returns one of the accounts that have `role`. `index` must be a * value between 0 and {getRoleMemberCount}, non-inclusive. * * Role bearers are not sorted in any particular way, and their ordering may * change at any point. * * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure * you perform all queries on the same block. See the following * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post] * for more information. */ function getRoleMember(bytes32 role, uint256 index) public view virtual returns (address) { return _roleMembers[role].at(index); } /** * @dev Returns the number of accounts that have `role`. Can be used * together with {getRoleMember} to enumerate all bearers of a role. */ function getRoleMemberCount(bytes32 role) public view virtual returns (uint256) { return _roleMembers[role].length(); } /** * @dev Overload {AccessControl-_grantRole} to track enumerable memberships */ function _grantRole(bytes32 role, address account) internal virtual override returns (bool) { bool granted = super._grantRole(role, account); if (granted) { _roleMembers[role].add(account); } return granted; } /** * @dev Overload {AccessControl-_revokeRole} to track enumerable memberships */ function _revokeRole(bytes32 role, address account) internal virtual override returns (bool) { bool revoked = super._revokeRole(role, account); if (revoked) { _roleMembers[role].remove(account); } return revoked; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface IAdmin { // ============ Events ============ event FeeRateUpdated(uint256 oldFeeRate, uint256 newFeeRate); event FeesSwept(address token, address recipient, uint256 amount); event ChainGasAmountUpdated(uint256 oldChainGasAmount, uint256 newChainGasAmount); // ============ Methods ============ function setProtocolFeeRate(uint256 newFeeRate) external; function sweepProtocolFees(address token, address recipient) external; function setChainGasAmount(uint256 newChainGasAmount) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (access/extensions/IAccessControlEnumerable.sol) pragma solidity ^0.8.20; import {IAccessControl} from "../IAccessControl.sol"; /** * @dev External interface of AccessControlEnumerable declared to support ERC-165 detection. */ interface IAccessControlEnumerable is IAccessControl { /** * @dev Returns one of the accounts that have `role`. `index` must be a * value between 0 and {getRoleMemberCount}, non-inclusive. * * Role bearers are not sorted in any particular way, and their ordering may * change at any point. * * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure * you perform all queries on the same block. See the following * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post] * for more information. */ function getRoleMember(bytes32 role, uint256 index) external view returns (address); /** * @dev Returns the number of accounts that have `role`. Can be used * together with {getRoleMember} to enumerate all bearers of a role. */ function getRoleMemberCount(bytes32 role) external view returns (uint256); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (access/AccessControl.sol) pragma solidity ^0.8.20; import {IAccessControl} from "./IAccessControl.sol"; import {Context} from "../utils/Context.sol"; import {ERC165} from "../utils/introspection/ERC165.sol"; /** * @dev Contract module that allows children to implement role-based access * control mechanisms. This is a lightweight version that doesn't allow enumerating role * members except through off-chain means by accessing the contract event logs. Some * applications may benefit from on-chain enumerability, for those cases see * {AccessControlEnumerable}. * * Roles are referred to by their `bytes32` identifier. These should be exposed * in the external API and be unique. The best way to achieve this is by * using `public constant` hash digests: * * ```solidity * bytes32 public constant MY_ROLE = keccak256("MY_ROLE"); * ``` * * Roles can be used to represent a set of permissions. To restrict access to a * function call, use {hasRole}: * * ```solidity * function foo() public { * require(hasRole(MY_ROLE, msg.sender)); * ... * } * ``` * * Roles can be granted and revoked dynamically via the {grantRole} and * {revokeRole} functions. Each role has an associated admin role, and only * accounts that have a role's admin role can call {grantRole} and {revokeRole}. * * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means * that only accounts with this role will be able to grant or revoke other * roles. More complex role relationships can be created by using * {_setRoleAdmin}. * * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to * grant and revoke this role. Extra precautions should be taken to secure * accounts that have been granted it. We recommend using {AccessControlDefaultAdminRules} * to enforce additional security measures for this role. */ abstract contract AccessControl is Context, IAccessControl, ERC165 { struct RoleData { mapping(address account => bool) hasRole; bytes32 adminRole; } mapping(bytes32 role => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Modifier that checks that an account has a specific role. Reverts * with an {AccessControlUnauthorizedAccount} error including the required role. */ modifier onlyRole(bytes32 role) { _checkRole(role); _; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId); } /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view virtual returns (bool) { return _roles[role].hasRole[account]; } /** * @dev Reverts with an {AccessControlUnauthorizedAccount} error if `_msgSender()` * is missing `role`. Overriding this function changes the behavior of the {onlyRole} modifier. */ function _checkRole(bytes32 role) internal view virtual { _checkRole(role, _msgSender()); } /** * @dev Reverts with an {AccessControlUnauthorizedAccount} error if `account` * is missing `role`. */ function _checkRole(bytes32 role, address account) internal view virtual { if (!hasRole(role, account)) { revert AccessControlUnauthorizedAccount(account, role); } } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view virtual returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. * * May emit a {RoleGranted} event. */ function grantRole(bytes32 role, address account) public virtual onlyRole(getRoleAdmin(role)) { _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. * * May emit a {RoleRevoked} event. */ function revokeRole(bytes32 role, address account) public virtual onlyRole(getRoleAdmin(role)) { _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been revoked `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `callerConfirmation`. * * May emit a {RoleRevoked} event. */ function renounceRole(bytes32 role, address callerConfirmation) public virtual { if (callerConfirmation != _msgSender()) { revert AccessControlBadConfirmation(); } _revokeRole(role, callerConfirmation); } /** * @dev Sets `adminRole` as ``role``'s admin role. * * Emits a {RoleAdminChanged} event. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { bytes32 previousAdminRole = getRoleAdmin(role); _roles[role].adminRole = adminRole; emit RoleAdminChanged(role, previousAdminRole, adminRole); } /** * @dev Attempts to grant `role` to `account` and returns a boolean indicating if `role` was granted. * * Internal function without access restriction. * * May emit a {RoleGranted} event. */ function _grantRole(bytes32 role, address account) internal virtual returns (bool) { if (!hasRole(role, account)) { _roles[role].hasRole[account] = true; emit RoleGranted(role, account, _msgSender()); return true; } else { return false; } } /** * @dev Attempts to revoke `role` to `account` and returns a boolean indicating if `role` was revoked. * * Internal function without access restriction. * * May emit a {RoleRevoked} event. */ function _revokeRole(bytes32 role, address account) internal virtual returns (bool) { if (hasRole(role, account)) { _roles[role].hasRole[account] = false; emit RoleRevoked(role, account, _msgSender()); return true; } else { return false; } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/structs/EnumerableSet.sol) // This file was procedurally generated from scripts/generate/templates/EnumerableSet.js. pragma solidity ^0.8.20; /** * @dev Library for managing * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive * types. * * Sets have the following properties: * * - Elements are added, removed, and checked for existence in constant time * (O(1)). * - Elements are enumerated in O(n). No guarantees are made on the ordering. * * ```solidity * contract Example { * // Add the library methods * using EnumerableSet for EnumerableSet.AddressSet; * * // Declare a set state variable * EnumerableSet.AddressSet private mySet; * } * ``` * * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`) * and `uint256` (`UintSet`) are supported. * * [WARNING] * ==== * Trying to delete such a structure from storage will likely result in data corruption, rendering the structure * unusable. * See https://github.com/ethereum/solidity/pull/11843[ethereum/solidity#11843] for more info. * * In order to clean an EnumerableSet, you can either remove all elements one by one or create a fresh instance using an * array of EnumerableSet. * ==== */ library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position is the index of the value in the `values` array plus 1. // Position 0 is used to mean a value is not in the set. mapping(bytes32 value => uint256) _positions; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._positions[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We cache the value's position to prevent multiple reads from the same storage slot uint256 position = set._positions[value]; if (position != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 valueIndex = position - 1; uint256 lastIndex = set._values.length - 1; if (valueIndex != lastIndex) { bytes32 lastValue = set._values[lastIndex]; // Move the lastValue to the index where the value to delete is set._values[valueIndex] = lastValue; // Update the tracked position of the lastValue (that was just moved) set._positions[lastValue] = position; } // Delete the slot where the moved value was stored set._values.pop(); // Delete the tracked position for the deleted slot delete set._positions[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._positions[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { return set._values[index]; } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function _values(Set storage set) private view returns (bytes32[] memory) { return set._values; } // Bytes32Set struct Bytes32Set { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _add(set._inner, value); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _remove(set._inner, value); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) { return _contains(set._inner, value); } /** * @dev Returns the number of values in the set. O(1). */ function length(Bytes32Set storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) { return _at(set._inner, index); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(Bytes32Set storage set) internal view returns (bytes32[] memory) { bytes32[] memory store = _values(set._inner); bytes32[] memory result; /// @solidity memory-safe-assembly assembly { result := store } return result; } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint160(uint256(_at(set._inner, index)))); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(AddressSet storage set) internal view returns (address[] memory) { bytes32[] memory store = _values(set._inner); address[] memory result; /// @solidity memory-safe-assembly assembly { result := store } return result; } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values in the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(UintSet storage set) internal view returns (uint256[] memory) { bytes32[] memory store = _values(set._inner); uint256[] memory result; /// @solidity memory-safe-assembly assembly { result := store } return result; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (access/IAccessControl.sol) pragma solidity ^0.8.20; /** * @dev External interface of AccessControl declared to support ERC-165 detection. */ interface IAccessControl { /** * @dev The `account` is missing a role. */ error AccessControlUnauthorizedAccount(address account, bytes32 neededRole); /** * @dev The caller of a function is not the expected one. * * NOTE: Don't confuse with {AccessControlUnauthorizedAccount}. */ error AccessControlBadConfirmation(); /** * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole` * * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite * {RoleAdminChanged} not being emitted signaling this. */ event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole); /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {AccessControl-_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) external view returns (bool); /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {AccessControl-_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) external view returns (bytes32); /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) external; /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) external; /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `callerConfirmation`. */ function renounceRole(bytes32 role, address callerConfirmation) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol) pragma solidity ^0.8.20; /** * @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; } function _contextSuffixLength() internal view virtual returns (uint256) { return 0; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/introspection/ERC165.sol) pragma solidity ^0.8.20; import {IERC165} from "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC-165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/introspection/IERC165.sol) pragma solidity ^0.8.20; /** * @dev Interface of the ERC-165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[ERC]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[ERC section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
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Contract Security Audit
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IFastBridge.BridgeParams","name":"params","type":"tuple"}],"name":"bridge","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"bridgeProofs","outputs":[{"internalType":"uint96","name":"timestamp","type":"uint96"},{"internalType":"address","name":"relayer","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"bridgeRelays","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"bridgeStatuses","outputs":[{"internalType":"enum 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IFastBridge.BridgeTransaction","name":"","type":"tuple"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleAdmin","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"uint256","name":"index","type":"uint256"}],"name":"getRoleMember","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleMemberCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"grantRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"hasRole","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"nonce","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"protocolFeeRate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"protocolFees","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes","name":"request","type":"bytes"},{"internalType":"bytes32","name":"destTxHash","type":"bytes32"}],"name":"prove","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes","name":"request","type":"bytes"}],"name":"refund","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes","name":"request","type":"bytes"}],"name":"relay","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"callerConfirmation","type":"address"}],"name":"renounceRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"revokeRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"newChainGasAmount","type":"uint256"}],"name":"setChainGasAmount","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"newFeeRate","type":"uint256"}],"name":"setProtocolFeeRate","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"address","name":"recipient","type":"address"}],"name":"sweepProtocolFees","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000bd88862fcc17de436f7bd17276c537acadda9a67
-----Decoded View---------------
Arg [0] : _owner (address): 0xbd88862FCc17De436f7BD17276C537aCADDa9a67
-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000bd88862fcc17de436f7bd17276c537acadda9a67
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Multichain Portfolio | 30 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
---|---|---|---|---|---|
ARB | 34.88% | $0.997273 | 72,181.5019 | $71,984.66 | |
ARB | 23.10% | $3,263.18 | 14.6071 | $47,665.67 | |
SCROLL | 19.35% | $0.998474 | 40,000.0091 | $39,938.97 | |
SCROLL | 9.59% | $3,263.08 | 6.0667 | $19,796.14 | |
BASE | 5.08% | $3,261.97 | 3.2137 | $10,483.04 | |
BASE | 1.47% | $0.998912 | 3,030.4277 | $3,027.13 | |
BASE | <0.01% | $0.011718 | 10 | $0.1171 | |
ETH | 3.63% | $0.997653 | 7,501.6042 | $7,484 | |
ETH | Ether (ETH) | 2.59% | $3,263.23 | 1.6407 | $5,354.04 |
OP | 0.17% | $3,262.12 | 0.1102 | $359.44 | |
OP | 0.12% | $0.998474 | 256.996 | $256.6 |
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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.