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Similar Match Source Code This contract matches the deployed Bytecode of the Source Code for Contract 0x35F0ca9B...ba75F1B8B The constructor portion of the code might be different and could alter the actual behaviour of the contract
Contract Name:
EVM2EVMOnRamp
Compiler Version
v0.8.19+commit.7dd6d404
Optimization Enabled:
Yes with 10000 runs
Other Settings:
paris EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.19; import {ITypeAndVersion} from "../../shared/interfaces/ITypeAndVersion.sol"; import {IPool} from "../interfaces/pools/IPool.sol"; import {IARM} from "../interfaces/IARM.sol"; import {IPriceRegistry} from "../interfaces/IPriceRegistry.sol"; import {IEVM2AnyOnRamp} from "../interfaces/IEVM2AnyOnRamp.sol"; import {IEVM2AnyOnRampClient} from "../interfaces/IEVM2AnyOnRampClient.sol"; import {ILinkAvailable} from "../interfaces/automation/ILinkAvailable.sol"; import {AggregateRateLimiter} from "../AggregateRateLimiter.sol"; import {Client} from "../libraries/Client.sol"; import {Internal} from "../libraries/Internal.sol"; import {RateLimiter} from "../libraries/RateLimiter.sol"; import {USDPriceWith18Decimals} from "../libraries/USDPriceWith18Decimals.sol"; import {EnumerableMapAddresses} from "../../shared/enumerable/EnumerableMapAddresses.sol"; import {SafeERC20} from "../../vendor/openzeppelin-solidity/v4.8.0/contracts/token/ERC20/utils/SafeERC20.sol"; import {IERC20} from "../../vendor/openzeppelin-solidity/v4.8.0/contracts/token/ERC20/IERC20.sol"; import {EnumerableMap} from "../../vendor/openzeppelin-solidity/v4.8.0/contracts/utils/structs/EnumerableMap.sol"; /// @notice The onRamp is a contract that handles lane-specific fee logic, NOP payments and /// bridgeable token support. /// @dev The EVM2EVMOnRamp, CommitStore and EVM2EVMOffRamp form an xchain upgradeable unit. Any change to one of them /// results an onchain upgrade of all 3. contract EVM2EVMOnRamp is IEVM2AnyOnRamp, ILinkAvailable, AggregateRateLimiter, ITypeAndVersion { using SafeERC20 for IERC20; using EnumerableMap for EnumerableMap.AddressToUintMap; using EnumerableMapAddresses for EnumerableMapAddresses.AddressToAddressMap; using USDPriceWith18Decimals for uint224; error InvalidExtraArgsTag(); error OnlyCallableByOwnerOrAdmin(); error OnlyCallableByOwnerOrAdminOrNop(); error InvalidWithdrawParams(); error NoFeesToPay(); error NoNopsToPay(); error InsufficientBalance(); error TooManyNops(); error MaxFeeBalanceReached(); error MessageTooLarge(uint256 maxSize, uint256 actualSize); error MessageGasLimitTooHigh(); error UnsupportedNumberOfTokens(); error UnsupportedToken(IERC20 token); error MustBeCalledByRouter(); error RouterMustSetOriginalSender(); error InvalidTokenPoolConfig(); error PoolAlreadyAdded(); error PoolDoesNotExist(address token); error TokenPoolMismatch(); error InvalidConfig(); error InvalidAddress(bytes encodedAddress); error BadARMSignal(); error LinkBalanceNotSettled(); error InvalidNopAddress(address nop); error NotAFeeToken(address token); error CannotSendZeroTokens(); error SourceTokenDataTooLarge(address token); error InvalidChainSelector(uint64 chainSelector); event ConfigSet(StaticConfig staticConfig, DynamicConfig dynamicConfig); event NopPaid(address indexed nop, uint256 amount); event FeeConfigSet(FeeTokenConfigArgs[] feeConfig); event TokenTransferFeeConfigSet(TokenTransferFeeConfigArgs[] transferFeeConfig); /// RMN depends on this event, if changing, please notify the RMN maintainers. event CCIPSendRequested(Internal.EVM2EVMMessage message); event NopsSet(uint256 nopWeightsTotal, NopAndWeight[] nopsAndWeights); event PoolAdded(address token, address pool); event PoolRemoved(address token, address pool); /// @dev Struct that contains the static configuration /// RMN depends on this struct, if changing, please notify the RMN maintainers. struct StaticConfig { address linkToken; // ────────╮ Link token address uint64 chainSelector; // ─────╯ Source chainSelector uint64 destChainSelector; // ─╮ Destination chainSelector uint64 defaultTxGasLimit; // │ Default gas limit for a tx uint96 maxNopFeesJuels; // ───╯ Max nop fee balance onramp can have address prevOnRamp; // Address of previous-version OnRamp address armProxy; // Address of ARM proxy } /// @dev Struct to contains the dynamic configuration struct DynamicConfig { address router; // ──────────────────────────╮ Router address uint16 maxNumberOfTokensPerMsg; // │ Maximum number of distinct ERC20 token transferred per message uint32 destGasOverhead; // │ Gas charged on top of the gasLimit to cover destination chain costs uint16 destGasPerPayloadByte; // │ Destination chain gas charged for passing each byte of `data` payload to receiver uint32 destDataAvailabilityOverheadGas; // ──╯ Extra data availability gas charged on top of the message, e.g. for OCR uint16 destGasPerDataAvailabilityByte; // ───╮ Amount of gas to charge per byte of message data that needs availability uint16 destDataAvailabilityMultiplierBps; // │ Multiplier for data availability gas, multiples of bps, or 0.0001 address priceRegistry; // │ Price registry address uint32 maxDataBytes; // │ Maximum payload data size in bytes uint32 maxPerMsgGasLimit; // ────────────────╯ Maximum gas limit for messages targeting EVMs } /// @dev Struct to hold the execution fee configuration for a fee token struct FeeTokenConfig { uint32 networkFeeUSDCents; // ─────────╮ Flat network fee to charge for messages, multiples of 0.01 USD uint64 gasMultiplierWeiPerEth; // │ Multiplier for gas costs, 1e18 based so 11e17 = 10% extra cost. uint64 premiumMultiplierWeiPerEth; // │ Multiplier for fee-token-specific premiums bool enabled; // ──────────────────────╯ Whether this fee token is enabled } /// @dev Struct to hold the fee configuration for a fee token, same as the FeeTokenConfig but with /// token included so that an array of these can be passed in to setFeeTokenConfig to set the mapping struct FeeTokenConfigArgs { address token; // ─────────────────────╮ Token address uint32 networkFeeUSDCents; // │ Flat network fee to charge for messages, multiples of 0.01 USD uint64 gasMultiplierWeiPerEth; // ─────╯ Multiplier for gas costs, 1e18 based so 11e17 = 10% extra cost uint64 premiumMultiplierWeiPerEth; // ─╮ Multiplier for fee-token-specific premiums, 1e18 based bool enabled; // ──────────────────────╯ Whether this fee token is enabled } /// @dev Struct to hold the transfer fee configuration for token transfers struct TokenTransferFeeConfig { uint32 minFeeUSDCents; // ────╮ Minimum fee to charge per token transfer, multiples of 0.01 USD uint32 maxFeeUSDCents; // │ Maximum fee to charge per token transfer, multiples of 0.01 USD uint16 deciBps; // │ Basis points charged on token transfers, multiples of 0.1bps, or 1e-5 uint32 destGasOverhead; // │ Gas charged to execute the token transfer on the destination chain uint32 destBytesOverhead; // ─╯ Extra data availability bytes on top of fixed transfer data, including sourceTokenData and offchainData } /// @dev Same as TokenTransferFeeConfig /// token included so that an array of these can be passed in to setTokenTransferFeeConfig struct TokenTransferFeeConfigArgs { address token; // ────────────╮ Token address uint32 minFeeUSDCents; // │ Minimum fee to charge per token transfer, multiples of 0.01 USD uint32 maxFeeUSDCents; // │ Maximum fee to charge per token transfer, multiples of 0.01 USD uint16 deciBps; // ───────────╯ Basis points charged on token transfers, multiples of 0.1bps, or 1e-5 uint32 destGasOverhead; // ───╮ Gas charged to execute the token transfer on the destination chain uint32 destBytesOverhead; // ─╯ Extra data availability bytes on top of fixed transfer data, including sourceTokenData and offchainData } /// @dev Nop address and weight, used to set the nops and their weights struct NopAndWeight { address nop; // ────╮ Address of the node operator uint16 weight; // ──╯ Weight for nop rewards } // STATIC CONFIG // solhint-disable-next-line chainlink-solidity/all-caps-constant-storage-variables string public constant override typeAndVersion = "EVM2EVMOnRamp 1.2.0"; /// @dev metadataHash is a lane-specific prefix for a message hash preimage which ensures global uniqueness /// Ensures that 2 identical messages sent to 2 different lanes will have a distinct hash. /// Must match the metadataHash used in computing leaf hashes offchain for the root committed in /// the commitStore and i_metadataHash in the offRamp. bytes32 internal immutable i_metadataHash; /// @dev Default gas limit for a transactions that did not specify /// a gas limit in the extraArgs. uint64 internal immutable i_defaultTxGasLimit; /// @dev Maximum nop fee that can accumulate in this onramp uint96 internal immutable i_maxNopFeesJuels; /// @dev The link token address - known to pay nops for their work address internal immutable i_linkToken; /// @dev The chain ID of the source chain that this contract is deployed to uint64 internal immutable i_chainSelector; /// @dev The chain ID of the destination chain uint64 internal immutable i_destChainSelector; /// @dev The address of previous-version OnRamp for this lane /// Used to be able to provide sequencing continuity during a zero downtime upgrade. address internal immutable i_prevOnRamp; /// @dev The address of the arm proxy address internal immutable i_armProxy; /// @dev the maximum number of nops that can be configured at the same time. /// Used to bound gas for loops over nops. uint256 private constant MAX_NUMBER_OF_NOPS = 64; // DYNAMIC CONFIG /// @dev The config for the onRamp DynamicConfig internal s_dynamicConfig; /// @dev (address nop => uint256 weight) EnumerableMap.AddressToUintMap internal s_nops; /// @dev source token => token pool EnumerableMapAddresses.AddressToAddressMap private s_poolsBySourceToken; /// @dev The execution fee token config that can be set by the owner or fee admin mapping(address token => FeeTokenConfig feeTokenConfig) internal s_feeTokenConfig; /// @dev The token transfer fee config that can be set by the owner or fee admin mapping(address token => TokenTransferFeeConfig tranferFeeConfig) internal s_tokenTransferFeeConfig; // STATE /// @dev The current nonce per sender. /// The offramp has a corresponding s_senderNonce mapping to ensure messages /// are executed in the same order they are sent. mapping(address sender => uint64 nonce) internal s_senderNonce; /// @dev The amount of LINK available to pay NOPS uint96 internal s_nopFeesJuels; /// @dev The combined weight of all NOPs weights uint32 internal s_nopWeightsTotal; /// @dev The last used sequence number. This is zero in the case where no /// messages has been sent yet. 0 is not a valid sequence number for any /// real transaction. uint64 internal s_sequenceNumber; constructor( StaticConfig memory staticConfig, DynamicConfig memory dynamicConfig, Internal.PoolUpdate[] memory tokensAndPools, RateLimiter.Config memory rateLimiterConfig, FeeTokenConfigArgs[] memory feeTokenConfigs, TokenTransferFeeConfigArgs[] memory tokenTransferFeeConfigArgs, NopAndWeight[] memory nopsAndWeights ) AggregateRateLimiter(rateLimiterConfig) { if ( staticConfig.linkToken == address(0) || staticConfig.chainSelector == 0 || staticConfig.destChainSelector == 0 || staticConfig.defaultTxGasLimit == 0 || staticConfig.armProxy == address(0) ) revert InvalidConfig(); i_metadataHash = keccak256( abi.encode( Internal.EVM_2_EVM_MESSAGE_HASH, staticConfig.chainSelector, staticConfig.destChainSelector, address(this) ) ); i_linkToken = staticConfig.linkToken; i_chainSelector = staticConfig.chainSelector; i_destChainSelector = staticConfig.destChainSelector; i_defaultTxGasLimit = staticConfig.defaultTxGasLimit; i_maxNopFeesJuels = staticConfig.maxNopFeesJuels; i_prevOnRamp = staticConfig.prevOnRamp; i_armProxy = staticConfig.armProxy; _setDynamicConfig(dynamicConfig); _setFeeTokenConfig(feeTokenConfigs); _setTokenTransferFeeConfig(tokenTransferFeeConfigArgs); _setNops(nopsAndWeights); // Set new tokens and pools _applyPoolUpdates(new Internal.PoolUpdate[](0), tokensAndPools); } // ================================================================ // │ Messaging │ // ================================================================ /// @inheritdoc IEVM2AnyOnRamp function getExpectedNextSequenceNumber() external view returns (uint64) { return s_sequenceNumber + 1; } /// @inheritdoc IEVM2AnyOnRamp function getSenderNonce(address sender) external view returns (uint64) { uint256 senderNonce = s_senderNonce[sender]; if (senderNonce == 0 && i_prevOnRamp != address(0)) { // If OnRamp was upgraded, check if sender has a nonce from the previous OnRamp. return IEVM2AnyOnRamp(i_prevOnRamp).getSenderNonce(sender); } return uint64(senderNonce); } /// @inheritdoc IEVM2AnyOnRampClient function forwardFromRouter( uint64 destChainSelector, Client.EVM2AnyMessage calldata message, uint256 feeTokenAmount, address originalSender ) external whenHealthy returns (bytes32) { // Validate message sender is set and allowed. Not validated in `getFee` since it is not user-driven. if (originalSender == address(0)) revert RouterMustSetOriginalSender(); // Router address may be zero intentionally to pause. if (msg.sender != s_dynamicConfig.router) revert MustBeCalledByRouter(); if (destChainSelector != i_destChainSelector) revert InvalidChainSelector(destChainSelector); // EVM destination addresses should be abi encoded and therefore always 32 bytes long // Not duplicately validated in `getFee`. Invalid address is uncommon, gas cost outweighs UX gain. if (message.receiver.length != 32) revert InvalidAddress(message.receiver); uint256 decodedReceiver = abi.decode(message.receiver, (uint256)); // We want to disallow sending to address(0) and to precompiles, which exist on address(1) through address(9). if (decodedReceiver > type(uint160).max || decodedReceiver < 10) revert InvalidAddress(message.receiver); uint256 gasLimit = _fromBytes(message.extraArgs).gasLimit; // Validate the message with various checks uint256 numberOfTokens = message.tokenAmounts.length; _validateMessage(message.data.length, gasLimit, numberOfTokens); // Only check token value if there are tokens if (numberOfTokens > 0) { for (uint256 i = 0; i < numberOfTokens; ++i) { if (message.tokenAmounts[i].amount == 0) revert CannotSendZeroTokens(); } // Rate limit on aggregated token value _rateLimitValue(message.tokenAmounts, IPriceRegistry(s_dynamicConfig.priceRegistry)); } // Convert feeToken to link if not already in link if (message.feeToken == i_linkToken) { // Since there is only 1b link this is safe s_nopFeesJuels += uint96(feeTokenAmount); } else { // the cast from uint256 to uint96 is considered safe, uint96 can store more than max supply of link token s_nopFeesJuels += uint96( IPriceRegistry(s_dynamicConfig.priceRegistry).convertTokenAmount(message.feeToken, feeTokenAmount, i_linkToken) ); } if (s_nopFeesJuels > i_maxNopFeesJuels) revert MaxFeeBalanceReached(); if (s_senderNonce[originalSender] == 0 && i_prevOnRamp != address(0)) { // If this is first time send for a sender in new OnRamp, check if they have a nonce // from the previous OnRamp and start from there instead of zero. s_senderNonce[originalSender] = IEVM2AnyOnRamp(i_prevOnRamp).getSenderNonce(originalSender); } // We need the next available sequence number so we increment before we use the value Internal.EVM2EVMMessage memory newMessage = Internal.EVM2EVMMessage({ sourceChainSelector: i_chainSelector, sender: originalSender, receiver: address(uint160(decodedReceiver)), sequenceNumber: ++s_sequenceNumber, gasLimit: gasLimit, strict: false, nonce: ++s_senderNonce[originalSender], feeToken: message.feeToken, feeTokenAmount: feeTokenAmount, data: message.data, tokenAmounts: message.tokenAmounts, sourceTokenData: new bytes[](numberOfTokens), // will be filled in later messageId: "" }); // Lock the tokens as last step. TokenPools may not always be trusted. // There should be no state changes after external call to TokenPools. for (uint256 i = 0; i < numberOfTokens; ++i) { Client.EVMTokenAmount memory tokenAndAmount = message.tokenAmounts[i]; bytes memory tokenData = getPoolBySourceToken(destChainSelector, IERC20(tokenAndAmount.token)).lockOrBurn( originalSender, message.receiver, tokenAndAmount.amount, i_destChainSelector, bytes("") // any future extraArgs component would be added here ); // Since the DON has to pay for the tokenData to be included on the destination chain, we cap the length of the tokenData. // This prevents gas bomb attacks on the NOPs. We use destBytesOverhead as a proxy to cap the number of bytes we accept. // As destBytesOverhead accounts for tokenData + offchainData, this caps the worst case abuse to the number of bytes reserved for offchainData. // It therefore fully mitigates gas bombs for most tokens, as most tokens don't use offchainData. if (tokenData.length > s_tokenTransferFeeConfig[tokenAndAmount.token].destBytesOverhead) revert SourceTokenDataTooLarge(tokenAndAmount.token); newMessage.sourceTokenData[i] = tokenData; } // Hash only after the sourceTokenData has been set newMessage.messageId = Internal._hash(newMessage, i_metadataHash); // Emit message request // Note this must happen after pools, some tokens (eg USDC) emit events that we // expect to directly precede this event. emit CCIPSendRequested(newMessage); return newMessage.messageId; } /// @dev Convert the extra args bytes into a struct /// @param extraArgs The extra args bytes /// @return The extra args struct function _fromBytes(bytes calldata extraArgs) internal view returns (Client.EVMExtraArgsV1 memory) { if (extraArgs.length == 0) { return Client.EVMExtraArgsV1({gasLimit: i_defaultTxGasLimit}); } if (bytes4(extraArgs) != Client.EVM_EXTRA_ARGS_V1_TAG) revert InvalidExtraArgsTag(); // EVMExtraArgsV1 originally included a second boolean (strict) field which we have deprecated entirely. // Clients may still send that version but it will be ignored. return abi.decode(extraArgs[4:], (Client.EVMExtraArgsV1)); } /// @notice Validate the forwarded message with various checks. /// @dev This function can be called multiple times during a CCIPSend, /// only common user-driven mistakes are validated here to minimize duplicate validation cost. /// @param dataLength The length of the data field of the message. /// @param gasLimit The gasLimit set in message for destination execution. /// @param numberOfTokens The number of tokens to be sent. function _validateMessage(uint256 dataLength, uint256 gasLimit, uint256 numberOfTokens) internal view { // Check that payload is formed correctly uint256 maxDataBytes = uint256(s_dynamicConfig.maxDataBytes); if (dataLength > maxDataBytes) revert MessageTooLarge(maxDataBytes, dataLength); if (gasLimit > uint256(s_dynamicConfig.maxPerMsgGasLimit)) revert MessageGasLimitTooHigh(); if (numberOfTokens > uint256(s_dynamicConfig.maxNumberOfTokensPerMsg)) revert UnsupportedNumberOfTokens(); } // ================================================================ // │ Config │ // ================================================================ /// @notice Returns the static onRamp config. /// @dev RMN depends on this function, if changing, please notify the RMN maintainers. /// @return the configuration. function getStaticConfig() external view returns (StaticConfig memory) { return StaticConfig({ linkToken: i_linkToken, chainSelector: i_chainSelector, destChainSelector: i_destChainSelector, defaultTxGasLimit: i_defaultTxGasLimit, maxNopFeesJuels: i_maxNopFeesJuels, prevOnRamp: i_prevOnRamp, armProxy: i_armProxy }); } /// @notice Returns the dynamic onRamp config. /// @return dynamicConfig the configuration. function getDynamicConfig() external view returns (DynamicConfig memory dynamicConfig) { return s_dynamicConfig; } /// @notice Sets the dynamic configuration. /// @param dynamicConfig The configuration. function setDynamicConfig(DynamicConfig memory dynamicConfig) external onlyOwner { _setDynamicConfig(dynamicConfig); } /// @notice Internal version of setDynamicConfig to allow for reuse in the constructor. function _setDynamicConfig(DynamicConfig memory dynamicConfig) internal { // We permit router to be set to zero as a way to pause the contract. if (dynamicConfig.priceRegistry == address(0)) revert InvalidConfig(); s_dynamicConfig = dynamicConfig; emit ConfigSet( StaticConfig({ linkToken: i_linkToken, chainSelector: i_chainSelector, destChainSelector: i_destChainSelector, defaultTxGasLimit: i_defaultTxGasLimit, maxNopFeesJuels: i_maxNopFeesJuels, prevOnRamp: i_prevOnRamp, armProxy: i_armProxy }), dynamicConfig ); } // ================================================================ // │ Tokens and pools │ // ================================================================ /// @inheritdoc IEVM2AnyOnRampClient function getSupportedTokens(uint64 /*destChainSelector*/) external view returns (address[] memory) { address[] memory sourceTokens = new address[](s_poolsBySourceToken.length()); for (uint256 i = 0; i < sourceTokens.length; ++i) { (sourceTokens[i], ) = s_poolsBySourceToken.at(i); } return sourceTokens; } /// @inheritdoc IEVM2AnyOnRampClient function getPoolBySourceToken(uint64 /*destChainSelector*/, IERC20 sourceToken) public view returns (IPool) { if (!s_poolsBySourceToken.contains(address(sourceToken))) revert UnsupportedToken(sourceToken); return IPool(s_poolsBySourceToken.get(address(sourceToken))); } /// @inheritdoc IEVM2AnyOnRamp /// @dev This method can only be called by the owner of the contract. function applyPoolUpdates( Internal.PoolUpdate[] memory removes, Internal.PoolUpdate[] memory adds ) external onlyOwner { _applyPoolUpdates(removes, adds); } function _applyPoolUpdates(Internal.PoolUpdate[] memory removes, Internal.PoolUpdate[] memory adds) internal { for (uint256 i = 0; i < removes.length; ++i) { address token = removes[i].token; address pool = removes[i].pool; if (!s_poolsBySourceToken.contains(token)) revert PoolDoesNotExist(token); if (s_poolsBySourceToken.get(token) != pool) revert TokenPoolMismatch(); if (s_poolsBySourceToken.remove(token)) { emit PoolRemoved(token, pool); } } for (uint256 i = 0; i < adds.length; ++i) { address token = adds[i].token; address pool = adds[i].pool; if (token == address(0) || pool == address(0)) revert InvalidTokenPoolConfig(); if (token != address(IPool(pool).getToken())) revert TokenPoolMismatch(); if (s_poolsBySourceToken.set(token, pool)) { emit PoolAdded(token, pool); } else { revert PoolAlreadyAdded(); } } } // ================================================================ // │ Fees │ // ================================================================ /// @inheritdoc IEVM2AnyOnRampClient /// @dev getFee MUST revert if the feeToken is not listed in the fee token config, as the router assumes it does. /// @param destChainSelector The destination chain selector. /// @param message The message to get quote for. /// @return feeTokenAmount The amount of fee token needed for the fee, in smallest denomination of the fee token. function getFee( uint64 destChainSelector, Client.EVM2AnyMessage calldata message ) external view returns (uint256 feeTokenAmount) { if (destChainSelector != i_destChainSelector) revert InvalidChainSelector(destChainSelector); uint256 gasLimit = _fromBytes(message.extraArgs).gasLimit; // Validate the message with various checks _validateMessage(message.data.length, gasLimit, message.tokenAmounts.length); FeeTokenConfig memory feeTokenConfig = s_feeTokenConfig[message.feeToken]; if (!feeTokenConfig.enabled) revert NotAFeeToken(message.feeToken); (uint224 feeTokenPrice, uint224 packedGasPrice) = IPriceRegistry(s_dynamicConfig.priceRegistry) .getTokenAndGasPrices(message.feeToken, destChainSelector); uint112 executionGasPrice = uint112(packedGasPrice); // Calculate premiumFee in USD with 18 decimals precision first. // If message-only and no token transfers, a flat network fee is charged. // If there are token transfers, premiumFee is calculated from token transfer fee. // If there are both token transfers and message, premiumFee is only calculated from token transfer fee. uint256 premiumFee = 0; uint32 tokenTransferGas = 0; uint32 tokenTransferBytesOverhead = 0; if (message.tokenAmounts.length > 0) { (premiumFee, tokenTransferGas, tokenTransferBytesOverhead) = _getTokenTransferCost( message.feeToken, feeTokenPrice, message.tokenAmounts ); } else { // Convert USD cents with 2 decimals to 18 decimals. premiumFee = uint256(feeTokenConfig.networkFeeUSDCents) * 1e16; } // Apply a feeToken-specific multiplier with 18 decimals, raising the premiumFee to 36 decimals premiumFee = premiumFee * feeTokenConfig.premiumMultiplierWeiPerEth; // Calculate execution gas fee on destination chain in USD with 36 decimals. // We add the message gas limit, the overhead gas, the gas of passing message data to receiver, and token transfer gas together. // We then multiply this gas total with the gas multiplier and gas price, converting it into USD with 36 decimals. uint256 executionCost = executionGasPrice * ((gasLimit + s_dynamicConfig.destGasOverhead + (message.data.length * s_dynamicConfig.destGasPerPayloadByte) + tokenTransferGas) * feeTokenConfig.gasMultiplierWeiPerEth); // Calculate data availability cost in USD with 36 decimals. Data availability cost exists on rollups that need to post // transaction calldata onto another storage layer, e.g. Eth mainnet, incurring additional storage gas costs. uint256 dataAvailabilityCost = 0; // Only calculate data availability cost if data availability multiplier is non-zero. // The multiplier should be set to 0 if destination chain does not charge data availability cost. if (s_dynamicConfig.destDataAvailabilityMultiplierBps > 0) { // Parse the data availability gas price stored in the higher-order 112 bits of the encoded gas price. uint112 dataAvailabilityGasPrice = uint112(packedGasPrice >> Internal.GAS_PRICE_BITS); dataAvailabilityCost = _getDataAvailabilityCost( dataAvailabilityGasPrice, message.data.length, message.tokenAmounts.length, tokenTransferBytesOverhead ); } // Calculate number of fee tokens to charge. // Total USD fee is in 36 decimals, feeTokenPrice is in 18 decimals USD for 1e18 smallest token denominations. // Result of the division is the number of smallest token denominations. return (premiumFee + executionCost + dataAvailabilityCost) / feeTokenPrice; } /// @notice Returns the estimated data availability cost of the message. /// @dev To save on gas, we use a single destGasPerDataAvailabilityByte value for both zero and non-zero bytes. /// @param dataAvailabilityGasPrice USD per data availability gas in 18 decimals. /// @param messageDataLength length of the data field in the message. /// @param numberOfTokens number of distinct token transfers in the message. /// @param tokenTransferBytesOverhead additional token transfer data passed to destination, e.g. USDC attestation. /// @return dataAvailabilityCostUSD36Decimal total data availability cost in USD with 36 decimals. function _getDataAvailabilityCost( uint112 dataAvailabilityGasPrice, uint256 messageDataLength, uint256 numberOfTokens, uint32 tokenTransferBytesOverhead ) internal view returns (uint256 dataAvailabilityCostUSD36Decimal) { // dataAvailabilityLengthBytes sums up byte lengths of fixed message fields and dynamic message fields. // Fixed message fields do account for the offset and length slot of the dynamic fields. uint256 dataAvailabilityLengthBytes = Internal.MESSAGE_FIXED_BYTES + messageDataLength + (numberOfTokens * Internal.MESSAGE_FIXED_BYTES_PER_TOKEN) + tokenTransferBytesOverhead; // destDataAvailabilityOverheadGas is a separate config value for flexibility to be updated independently of message cost. // Its value is determined by CCIP lane implementation, e.g. the overhead data posted for OCR. uint256 dataAvailabilityGas = (dataAvailabilityLengthBytes * s_dynamicConfig.destGasPerDataAvailabilityByte) + s_dynamicConfig.destDataAvailabilityOverheadGas; // dataAvailabilityGasPrice is in 18 decimals, destDataAvailabilityMultiplierBps is in 4 decimals // We pad 14 decimals to bring the result to 36 decimals, in line with token bps and execution fee. return ((dataAvailabilityGas * dataAvailabilityGasPrice) * s_dynamicConfig.destDataAvailabilityMultiplierBps) * 1e14; } /// @notice Returns the token transfer cost parameters. /// A basis point fee is calculated from the USD value of each token transfer. /// For each individual transfer, this fee is between [minFeeUSD, maxFeeUSD]. /// Total transfer fee is the sum of each individual token transfer fee. /// @dev Assumes that tokenAmounts are validated to be listed tokens elsewhere. /// @dev Splitting one token transfer into multiple transfers is discouraged, /// as it will result in a transferFee equal or greater than the same amount aggregated/de-duped. /// @param feeToken address of the feeToken. /// @param feeTokenPrice price of feeToken in USD with 18 decimals. /// @param tokenAmounts token transfers in the message. /// @return tokenTransferFeeUSDWei total token transfer bps fee in USD with 18 decimals. /// @return tokenTransferGas total execution gas of the token transfers. /// @return tokenTransferBytesOverhead additional token transfer data passed to destination, e.g. USDC attestation. function _getTokenTransferCost( address feeToken, uint224 feeTokenPrice, Client.EVMTokenAmount[] calldata tokenAmounts ) internal view returns (uint256 tokenTransferFeeUSDWei, uint32 tokenTransferGas, uint32 tokenTransferBytesOverhead) { uint256 numberOfTokens = tokenAmounts.length; for (uint256 i = 0; i < numberOfTokens; ++i) { Client.EVMTokenAmount memory tokenAmount = tokenAmounts[i]; TokenTransferFeeConfig memory transferFeeConfig = s_tokenTransferFeeConfig[tokenAmount.token]; // Validate if the token is supported, do not calculate fee for unsupported tokens. if (!s_poolsBySourceToken.contains(tokenAmount.token)) revert UnsupportedToken(IERC20(tokenAmount.token)); uint256 bpsFeeUSDWei = 0; // Only calculate bps fee if ratio is greater than 0. Ratio of 0 means no bps fee for a token. // Useful for when the PriceRegistry cannot return a valid price for the token. if (transferFeeConfig.deciBps > 0) { uint224 tokenPrice = 0; if (tokenAmount.token != feeToken) { tokenPrice = IPriceRegistry(s_dynamicConfig.priceRegistry).getValidatedTokenPrice(tokenAmount.token); } else { tokenPrice = feeTokenPrice; } // Calculate token transfer value, then apply fee ratio // ratio represents multiples of 0.1bps, or 1e-5 bpsFeeUSDWei = (tokenPrice._calcUSDValueFromTokenAmount(tokenAmount.amount) * transferFeeConfig.deciBps) / 1e5; } tokenTransferGas += transferFeeConfig.destGasOverhead; tokenTransferBytesOverhead += transferFeeConfig.destBytesOverhead; // Bps fees should be kept within range of [minFeeUSD, maxFeeUSD]. // Convert USD values with 2 decimals to 18 decimals. uint256 minFeeUSDWei = uint256(transferFeeConfig.minFeeUSDCents) * 1e16; if (bpsFeeUSDWei < minFeeUSDWei) { tokenTransferFeeUSDWei += minFeeUSDWei; continue; } uint256 maxFeeUSDWei = uint256(transferFeeConfig.maxFeeUSDCents) * 1e16; if (bpsFeeUSDWei > maxFeeUSDWei) { tokenTransferFeeUSDWei += maxFeeUSDWei; continue; } tokenTransferFeeUSDWei += bpsFeeUSDWei; } return (tokenTransferFeeUSDWei, tokenTransferGas, tokenTransferBytesOverhead); } /// @notice Gets the fee configuration for a token /// @param token The token to get the fee configuration for /// @return feeTokenConfig FeeTokenConfig struct function getFeeTokenConfig(address token) external view returns (FeeTokenConfig memory feeTokenConfig) { return s_feeTokenConfig[token]; } /// @notice Sets the fee configuration for a token /// @param feeTokenConfigArgs Array of FeeTokenConfigArgs structs. function setFeeTokenConfig(FeeTokenConfigArgs[] memory feeTokenConfigArgs) external onlyOwnerOrAdmin { _setFeeTokenConfig(feeTokenConfigArgs); } /// @dev Set the fee config /// @param feeTokenConfigArgs The fee token configs. function _setFeeTokenConfig(FeeTokenConfigArgs[] memory feeTokenConfigArgs) internal { for (uint256 i = 0; i < feeTokenConfigArgs.length; ++i) { FeeTokenConfigArgs memory configArg = feeTokenConfigArgs[i]; s_feeTokenConfig[configArg.token] = FeeTokenConfig({ networkFeeUSDCents: configArg.networkFeeUSDCents, gasMultiplierWeiPerEth: configArg.gasMultiplierWeiPerEth, premiumMultiplierWeiPerEth: configArg.premiumMultiplierWeiPerEth, enabled: configArg.enabled }); } emit FeeConfigSet(feeTokenConfigArgs); } /// @notice Gets the transfer fee config for a given token. function getTokenTransferFeeConfig( address token ) external view returns (TokenTransferFeeConfig memory tokenTransferFeeConfig) { return s_tokenTransferFeeConfig[token]; } /// @notice Sets the transfer fee config. /// @dev only callable by the owner or admin. function setTokenTransferFeeConfig( TokenTransferFeeConfigArgs[] memory tokenTransferFeeConfigArgs ) external onlyOwnerOrAdmin { _setTokenTransferFeeConfig(tokenTransferFeeConfigArgs); } /// @notice internal helper to set the token transfer fee config. function _setTokenTransferFeeConfig(TokenTransferFeeConfigArgs[] memory tokenTransferFeeConfigArgs) internal { for (uint256 i = 0; i < tokenTransferFeeConfigArgs.length; ++i) { TokenTransferFeeConfigArgs memory configArg = tokenTransferFeeConfigArgs[i]; s_tokenTransferFeeConfig[configArg.token] = TokenTransferFeeConfig({ minFeeUSDCents: configArg.minFeeUSDCents, maxFeeUSDCents: configArg.maxFeeUSDCents, deciBps: configArg.deciBps, destGasOverhead: configArg.destGasOverhead, destBytesOverhead: configArg.destBytesOverhead }); } emit TokenTransferFeeConfigSet(tokenTransferFeeConfigArgs); } // ================================================================ // │ NOP payments │ // ================================================================ /// @notice Get the total amount of fees to be paid to the Nops (in LINK) /// @return totalNopFees function getNopFeesJuels() external view returns (uint96) { return s_nopFeesJuels; } /// @notice Gets the Nops and their weights /// @return nopsAndWeights Array of NopAndWeight structs /// @return weightsTotal The sum weight of all Nops function getNops() external view returns (NopAndWeight[] memory nopsAndWeights, uint256 weightsTotal) { uint256 length = s_nops.length(); nopsAndWeights = new NopAndWeight[](length); for (uint256 i = 0; i < length; ++i) { (address nopAddress, uint256 nopWeight) = s_nops.at(i); nopsAndWeights[i] = NopAndWeight({nop: nopAddress, weight: uint16(nopWeight)}); } weightsTotal = s_nopWeightsTotal; return (nopsAndWeights, weightsTotal); } /// @notice Sets the Nops and their weights /// @param nopsAndWeights Array of NopAndWeight structs function setNops(NopAndWeight[] calldata nopsAndWeights) external onlyOwnerOrAdmin { _setNops(nopsAndWeights); } /// @param nopsAndWeights New set of nops and weights /// @dev Clears existing nops, sets new nops and weights /// @dev We permit fees to accrue before nops are configured, in which case /// they will go to the first set of configured nops. function _setNops(NopAndWeight[] memory nopsAndWeights) internal { uint256 numberOfNops = nopsAndWeights.length; if (numberOfNops > MAX_NUMBER_OF_NOPS) revert TooManyNops(); // Make sure all nops have been paid before removing nops // We only have to pay when there are nops and there is enough // outstanding NOP balance to trigger a payment. if (s_nopWeightsTotal > 0 && s_nopFeesJuels >= s_nopWeightsTotal) { payNops(); } // Remove all previous nops, move from end to start to avoid shifting for (uint256 i = s_nops.length(); i > 0; --i) { (address nop, ) = s_nops.at(i - 1); s_nops.remove(nop); } // Add new uint32 nopWeightsTotal = 0; // nopWeightsTotal is bounded by the MAX_NUMBER_OF_NOPS and the weight of // a single nop being of type uint16. This ensures nopWeightsTotal will // always fit into the uint32 type. for (uint256 i = 0; i < numberOfNops; ++i) { // Make sure the LINK token is not a nop because the link token doesn't allow // self transfers. If set as nop, payNops would always revert. Since setNops // calls payNops, we can never remove the LINK token as a nop. address nop = nopsAndWeights[i].nop; uint16 weight = nopsAndWeights[i].weight; if (nop == i_linkToken || nop == address(0)) revert InvalidNopAddress(nop); s_nops.set(nop, weight); nopWeightsTotal += weight; } s_nopWeightsTotal = nopWeightsTotal; emit NopsSet(nopWeightsTotal, nopsAndWeights); } /// @notice Pays the Node Ops their outstanding balances. /// @dev some balance can remain after payments are done. This is at most the sum /// of the weight of all nops. Since nop weights are uint16s and we can have at /// most MAX_NUMBER_OF_NOPS NOPs, the highest possible value is 2**22 or 0.04 gjuels. function payNops() public onlyOwnerOrAdminOrNop { uint256 weightsTotal = s_nopWeightsTotal; if (weightsTotal == 0) revert NoNopsToPay(); uint96 totalFeesToPay = s_nopFeesJuels; if (totalFeesToPay < weightsTotal) revert NoFeesToPay(); if (_linkLeftAfterNopFees() < 0) revert InsufficientBalance(); uint96 fundsLeft = totalFeesToPay; uint256 numberOfNops = s_nops.length(); for (uint256 i = 0; i < numberOfNops; ++i) { (address nop, uint256 weight) = s_nops.at(i); // amount can never be higher than totalFeesToPay so the cast to uint96 is safe uint96 amount = uint96((totalFeesToPay * weight) / weightsTotal); fundsLeft -= amount; IERC20(i_linkToken).safeTransfer(nop, amount); emit NopPaid(nop, amount); } // Some funds can remain, since this is an incredibly small // amount we consider this OK. s_nopFeesJuels = fundsLeft; } /// @notice Allows the owner to withdraw any ERC20 token that is not the fee token /// @param feeToken The token to withdraw /// @param to The address to send the tokens to function withdrawNonLinkFees(address feeToken, address to) external onlyOwnerOrAdmin { if (feeToken == i_linkToken || to == address(0)) revert InvalidWithdrawParams(); // We require the link balance to be settled before allowing withdrawal // of non-link fees. if (_linkLeftAfterNopFees() < 0) revert LinkBalanceNotSettled(); IERC20(feeToken).safeTransfer(to, IERC20(feeToken).balanceOf(address(this))); } // ================================================================ // │ Link monitoring │ // ================================================================ /// @notice Calculate remaining LINK balance after paying nops /// @return balance if nops were to be paid function _linkLeftAfterNopFees() private view returns (int256) { // Since LINK caps at uint96, casting to int256 is safe return int256(IERC20(i_linkToken).balanceOf(address(this))) - int256(uint256(s_nopFeesJuels)); } /// @notice Allow keeper to monitor funds available for paying nops function linkAvailableForPayment() external view returns (int256) { return _linkLeftAfterNopFees(); } // ================================================================ // │ Access and ARM │ // ================================================================ /// @dev Require that the sender is the owner or the fee admin or a nop modifier onlyOwnerOrAdminOrNop() { if (msg.sender != owner() && msg.sender != s_admin && !s_nops.contains(msg.sender)) revert OnlyCallableByOwnerOrAdminOrNop(); _; } /// @dev Require that the sender is the owner or the fee admin modifier onlyOwnerOrAdmin() { if (msg.sender != owner() && msg.sender != s_admin) revert OnlyCallableByOwnerOrAdmin(); _; } /// @notice Ensure that the ARM has not emitted a bad signal, and that the latest heartbeat is not stale. modifier whenHealthy() { if (IARM(i_armProxy).isCursed()) revert BadARMSignal(); _; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface ITypeAndVersion { function typeAndVersion() external pure returns (string memory); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import {IERC20} from "../../../vendor/openzeppelin-solidity/v4.8.0/contracts/token/ERC20/IERC20.sol"; // Shared public interface for multiple pool types. // Each pool type handles a different child token model (lock/unlock, mint/burn.) interface IPool { /// @notice Lock tokens into the pool or burn the tokens. /// @param originalSender Original sender of the tokens. /// @param receiver Receiver of the tokens on destination chain. /// @param amount Amount to lock or burn. /// @param destChainSelector Destination chain Id. /// @param extraArgs Additional data passed in by sender for lockOrBurn processing /// in custom pools on source chain. /// @return retData Optional field that contains bytes. Unused for now but already /// implemented to allow future upgrades while preserving the interface. function lockOrBurn( address originalSender, bytes calldata receiver, uint256 amount, uint64 destChainSelector, bytes calldata extraArgs ) external returns (bytes memory); /// @notice Releases or mints tokens to the receiver address. /// @param originalSender Original sender of the tokens. /// @param receiver Receiver of the tokens. /// @param amount Amount to release or mint. /// @param sourceChainSelector Source chain Id. /// @param extraData Additional data supplied offchain for releaseOrMint processing in /// custom pools on dest chain. This could be an attestation that was retrieved through a /// third party API. /// @dev offchainData can come from any untrusted source. function releaseOrMint( bytes memory originalSender, address receiver, uint256 amount, uint64 sourceChainSelector, bytes memory extraData ) external; /// @notice Gets the IERC20 token that this pool can lock or burn. /// @return token The IERC20 token representation. function getToken() external view returns (IERC20 token); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /// @notice This interface contains the only ARM-related functions that might be used on-chain by other CCIP contracts. interface IARM { /// @notice A Merkle root tagged with the address of the commit store contract it is destined for. struct TaggedRoot { address commitStore; bytes32 root; } /// @notice Callers MUST NOT cache the return value as a blessed tagged root could become unblessed. function isBlessed(TaggedRoot calldata taggedRoot) external view returns (bool); /// @notice When the ARM is "cursed", CCIP pauses until the curse is lifted. function isCursed() external view returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import {Internal} from "../libraries/Internal.sol"; interface IPriceRegistry { /// @notice Update the price for given tokens and gas prices for given chains. /// @param priceUpdates The price updates to apply. function updatePrices(Internal.PriceUpdates memory priceUpdates) external; /// @notice Get the `tokenPrice` for a given token. /// @param token The token to get the price for. /// @return tokenPrice The tokenPrice for the given token. function getTokenPrice(address token) external view returns (Internal.TimestampedPackedUint224 memory); /// @notice Get the `tokenPrice` for a given token, checks if the price is valid. /// @param token The token to get the price for. /// @return tokenPrice The tokenPrice for the given token if it exists and is valid. function getValidatedTokenPrice(address token) external view returns (uint224); /// @notice Get the `tokenPrice` for an array of tokens. /// @param tokens The tokens to get prices for. /// @return tokenPrices The tokenPrices for the given tokens. function getTokenPrices(address[] calldata tokens) external view returns (Internal.TimestampedPackedUint224[] memory); /// @notice Get an encoded `gasPrice` for a given destination chain ID. /// The 224-bit result encodes necessary gas price components. /// On L1 chains like Ethereum or Avax, the only component is the gas price. /// On Optimistic Rollups, there are two components - the L2 gas price, and L1 base fee for data availability. /// On future chains, there could be more or differing price components. /// PriceRegistry does not contain chain-specific logic to parse destination chain price components. /// @param destChainSelector The destination chain to get the price for. /// @return gasPrice The encoded gasPrice for the given destination chain ID. function getDestinationChainGasPrice( uint64 destChainSelector ) external view returns (Internal.TimestampedPackedUint224 memory); /// @notice Gets the fee token price and the gas price, both denominated in dollars. /// @param token The source token to get the price for. /// @param destChainSelector The destination chain to get the gas price for. /// @return tokenPrice The price of the feeToken in 1e18 dollars per base unit. /// @return gasPrice The price of gas in 1e18 dollars per base unit. function getTokenAndGasPrices( address token, uint64 destChainSelector ) external view returns (uint224 tokenPrice, uint224 gasPrice); /// @notice Convert a given token amount to target token amount. /// @param fromToken The given token address. /// @param fromTokenAmount The given token amount. /// @param toToken The target token address. /// @return toTokenAmount The target token amount. function convertTokenAmount( address fromToken, uint256 fromTokenAmount, address toToken ) external view returns (uint256 toTokenAmount); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import {IEVM2AnyOnRampClient} from "./IEVM2AnyOnRampClient.sol"; import {Internal} from "../libraries/Internal.sol"; interface IEVM2AnyOnRamp is IEVM2AnyOnRampClient { /// @notice Gets the next sequence number to be used in the onRamp /// @return the next sequence number to be used function getExpectedNextSequenceNumber() external view returns (uint64); /// @notice Get the next nonce for a given sender /// @param sender The sender to get the nonce for /// @return nonce The next nonce for the sender function getSenderNonce(address sender) external view returns (uint64 nonce); /// @notice Adds and removed token pools. /// @param removes The tokens and pools to be removed /// @param adds The tokens and pools to be added. function applyPoolUpdates(Internal.PoolUpdate[] memory removes, Internal.PoolUpdate[] memory adds) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import {IPool} from "./pools/IPool.sol"; import {Client} from "../libraries/Client.sol"; import {IERC20} from "../../vendor/openzeppelin-solidity/v4.8.0/contracts/token/ERC20/IERC20.sol"; interface IEVM2AnyOnRampClient { /// @notice Get the fee for a given ccip message /// @param destChainSelector The destination chain selector /// @param message The message to calculate the cost for /// @return fee The calculated fee function getFee(uint64 destChainSelector, Client.EVM2AnyMessage calldata message) external view returns (uint256 fee); /// @notice Get the pool for a specific token /// @param destChainSelector The destination chain selector /// @param sourceToken The source chain token to get the pool for /// @return pool Token pool function getPoolBySourceToken(uint64 destChainSelector, IERC20 sourceToken) external view returns (IPool); /// @notice Gets a list of all supported source chain tokens. /// @param destChainSelector The destination chain selector /// @return tokens The addresses of all tokens that this onRamp supports the given destination chain function getSupportedTokens(uint64 destChainSelector) external view returns (address[] memory tokens); /// @notice Send a message to the remote chain /// @dev only callable by the Router /// @dev approve() must have already been called on the token using the this ramp address as the spender. /// @dev if the contract is paused, this function will revert. /// @param destChainSelector The destination chain selector /// @param message Message struct to send /// @param feeTokenAmount Amount of fee tokens for payment /// @param originalSender The original initiator of the CCIP request function forwardFromRouter( uint64 destChainSelector, Client.EVM2AnyMessage memory message, uint256 feeTokenAmount, address originalSender ) external returns (bytes32); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /// @notice Implement this contract so that a keeper-compatible contract can monitor /// and fund the implementation contract with LINK if it falls below a defined threshold. interface ILinkAvailable { function linkAvailableForPayment() external view returns (int256 availableBalance); }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.19; import {IPriceRegistry} from "./interfaces/IPriceRegistry.sol"; import {OwnerIsCreator} from "./../shared/access/OwnerIsCreator.sol"; import {Client} from "./libraries/Client.sol"; import {RateLimiter} from "./libraries/RateLimiter.sol"; import {USDPriceWith18Decimals} from "./libraries/USDPriceWith18Decimals.sol"; /// @notice The aggregate rate limiter is a wrapper of the token bucket rate limiter /// which permits rate limiting based on the aggregate value of a group of /// token transfers, using a price registry to convert to a numeraire asset (e.g. USD). contract AggregateRateLimiter is OwnerIsCreator { using RateLimiter for RateLimiter.TokenBucket; using USDPriceWith18Decimals for uint224; error PriceNotFoundForToken(address token); event AdminSet(address newAdmin); // The address of the token limit admin that has the same permissions as the owner. address internal s_admin; // The token bucket object that contains the bucket state. RateLimiter.TokenBucket private s_rateLimiter; /// @param config The RateLimiter.Config containing the capacity and refill rate /// of the bucket, plus the admin address. constructor(RateLimiter.Config memory config) { s_rateLimiter = RateLimiter.TokenBucket({ rate: config.rate, capacity: config.capacity, tokens: config.capacity, lastUpdated: uint32(block.timestamp), isEnabled: config.isEnabled }); } /// @notice Consumes value from the rate limiter bucket based on the /// token value given. First, calculate the prices function _rateLimitValue(Client.EVMTokenAmount[] memory tokenAmounts, IPriceRegistry priceRegistry) internal { uint256 numberOfTokens = tokenAmounts.length; uint256 value = 0; for (uint256 i = 0; i < numberOfTokens; ++i) { // not fetching validated price, as price staleness is not important for value-based rate limiting // we only need to verify price is not 0 uint224 pricePerToken = priceRegistry.getTokenPrice(tokenAmounts[i].token).value; if (pricePerToken == 0) revert PriceNotFoundForToken(tokenAmounts[i].token); value += pricePerToken._calcUSDValueFromTokenAmount(tokenAmounts[i].amount); } s_rateLimiter._consume(value, address(0)); } /// @notice Gets the token bucket with its values for the block it was requested at. /// @return The token bucket. function currentRateLimiterState() external view returns (RateLimiter.TokenBucket memory) { return s_rateLimiter._currentTokenBucketState(); } /// @notice Sets the rate limited config. /// @param config The new rate limiter config. /// @dev should only be callable by the owner or token limit admin. function setRateLimiterConfig(RateLimiter.Config memory config) external onlyAdminOrOwner { s_rateLimiter._setTokenBucketConfig(config); } // ================================================================ // │ Access │ // ================================================================ /// @notice Gets the token limit admin address. /// @return the token limit admin address. function getTokenLimitAdmin() external view returns (address) { return s_admin; } /// @notice Sets the token limit admin address. /// @param newAdmin the address of the new admin. /// @dev setting this to address(0) indicates there is no active admin. function setAdmin(address newAdmin) external onlyAdminOrOwner { s_admin = newAdmin; emit AdminSet(newAdmin); } /// @notice a modifier that allows the owner or the s_tokenLimitAdmin call the functions /// it is applied to. modifier onlyAdminOrOwner() { if (msg.sender != owner() && msg.sender != s_admin) revert RateLimiter.OnlyCallableByAdminOrOwner(); _; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; // End consumer library. library Client { /// @dev RMN depends on this struct, if changing, please notify the RMN maintainers. struct EVMTokenAmount { address token; // token address on the local chain. uint256 amount; // Amount of tokens. } struct Any2EVMMessage { bytes32 messageId; // MessageId corresponding to ccipSend on source. uint64 sourceChainSelector; // Source chain selector. bytes sender; // abi.decode(sender) if coming from an EVM chain. bytes data; // payload sent in original message. EVMTokenAmount[] destTokenAmounts; // Tokens and their amounts in their destination chain representation. } // If extraArgs is empty bytes, the default is 200k gas limit. struct EVM2AnyMessage { bytes receiver; // abi.encode(receiver address) for dest EVM chains bytes data; // Data payload EVMTokenAmount[] tokenAmounts; // Token transfers address feeToken; // Address of feeToken. address(0) means you will send msg.value. bytes extraArgs; // Populate this with _argsToBytes(EVMExtraArgsV1) } // bytes4(keccak256("CCIP EVMExtraArgsV1")); bytes4 public constant EVM_EXTRA_ARGS_V1_TAG = 0x97a657c9; struct EVMExtraArgsV1 { uint256 gasLimit; } function _argsToBytes(EVMExtraArgsV1 memory extraArgs) internal pure returns (bytes memory bts) { return abi.encodeWithSelector(EVM_EXTRA_ARGS_V1_TAG, extraArgs); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import {Client} from "./Client.sol"; import {MerkleMultiProof} from "../libraries/MerkleMultiProof.sol"; // Library for CCIP internal definitions common to multiple contracts. library Internal { /// @dev The minimum amount of gas to perform the call with exact gas. /// We include this in the offramp so that we can redeploy to adjust it /// should a hardfork change the gas costs of relevant opcodes in callWithExactGas. uint16 internal constant GAS_FOR_CALL_EXACT_CHECK = 5_000; // @dev We limit return data to a selector plus 4 words. This is to avoid // malicious contracts from returning large amounts of data and causing // repeated out-of-gas scenarios. uint16 internal constant MAX_RET_BYTES = 4 + 4 * 32; /// @notice A collection of token price and gas price updates. /// @dev RMN depends on this struct, if changing, please notify the RMN maintainers. struct PriceUpdates { TokenPriceUpdate[] tokenPriceUpdates; GasPriceUpdate[] gasPriceUpdates; } /// @notice Token price in USD. /// @dev RMN depends on this struct, if changing, please notify the RMN maintainers. struct TokenPriceUpdate { address sourceToken; // Source token uint224 usdPerToken; // 1e18 USD per smallest unit of token } /// @notice Gas price for a given chain in USD, its value may contain tightly packed fields. /// @dev RMN depends on this struct, if changing, please notify the RMN maintainers. struct GasPriceUpdate { uint64 destChainSelector; // Destination chain selector uint224 usdPerUnitGas; // 1e18 USD per smallest unit (e.g. wei) of destination chain gas } /// @notice A timestamped uint224 value that can contain several tightly packed fields. struct TimestampedPackedUint224 { uint224 value; // ───────╮ Value in uint224, packed. uint32 timestamp; // ────╯ Timestamp of the most recent price update. } /// @dev Gas price is stored in 112-bit unsigned int. uint224 can pack 2 prices. /// When packing L1 and L2 gas prices, L1 gas price is left-shifted to the higher-order bits. /// Using uint8 type, which cannot be higher than other bit shift operands, to avoid shift operand type warning. uint8 public constant GAS_PRICE_BITS = 112; struct PoolUpdate { address token; // The IERC20 token address address pool; // The token pool address } /// @notice Report that is submitted by the execution DON at the execution phase. /// @dev RMN depends on this struct, if changing, please notify the RMN maintainers. struct ExecutionReport { EVM2EVMMessage[] messages; // Contains a bytes array for each message, each inner bytes array contains bytes per transferred token bytes[][] offchainTokenData; bytes32[] proofs; uint256 proofFlagBits; } /// @notice The cross chain message that gets committed to EVM chains. /// @dev RMN depends on this struct, if changing, please notify the RMN maintainers. struct EVM2EVMMessage { uint64 sourceChainSelector; // ─────────╮ the chain selector of the source chain, note: not chainId address sender; // ─────────────────────╯ sender address on the source chain address receiver; // ───────────────────╮ receiver address on the destination chain uint64 sequenceNumber; // ──────────────╯ sequence number, not unique across lanes uint256 gasLimit; // user supplied maximum gas amount available for dest chain execution bool strict; // ────────────────────────╮ DEPRECATED uint64 nonce; // │ nonce for this lane for this sender, not unique across senders/lanes address feeToken; // ───────────────────╯ fee token uint256 feeTokenAmount; // fee token amount bytes data; // arbitrary data payload supplied by the message sender Client.EVMTokenAmount[] tokenAmounts; // array of tokens and amounts to transfer bytes[] sourceTokenData; // array of token pool return values, one per token bytes32 messageId; // a hash of the message data } /// @dev EVM2EVMMessage struct has 13 fields, including 3 variable arrays. /// Each variable array takes 1 more slot to store its length. /// When abi encoded, excluding array contents, /// EVM2EVMMessage takes up a fixed number of 16 lots, 32 bytes each. /// For structs that contain arrays, 1 more slot is added to the front, reaching a total of 17. uint256 public constant MESSAGE_FIXED_BYTES = 32 * 17; /// @dev Each token transfer adds 1 EVMTokenAmount and 1 bytes. /// When abiEncoded, each EVMTokenAmount takes 2 slots, each bytes takes 2 slots, excl bytes contents uint256 public constant MESSAGE_FIXED_BYTES_PER_TOKEN = 32 * 4; function _toAny2EVMMessage( EVM2EVMMessage memory original, Client.EVMTokenAmount[] memory destTokenAmounts ) internal pure returns (Client.Any2EVMMessage memory message) { message = Client.Any2EVMMessage({ messageId: original.messageId, sourceChainSelector: original.sourceChainSelector, sender: abi.encode(original.sender), data: original.data, destTokenAmounts: destTokenAmounts }); } bytes32 internal constant EVM_2_EVM_MESSAGE_HASH = keccak256("EVM2EVMMessageHashV2"); function _hash(EVM2EVMMessage memory original, bytes32 metadataHash) internal pure returns (bytes32) { // Fixed-size message fields are included in nested hash to reduce stack pressure. // This hashing scheme is also used by RMN. If changing it, please notify the RMN maintainers. return keccak256( abi.encode( MerkleMultiProof.LEAF_DOMAIN_SEPARATOR, metadataHash, keccak256( abi.encode( original.sender, original.receiver, original.sequenceNumber, original.gasLimit, original.strict, original.nonce, original.feeToken, original.feeTokenAmount ) ), keccak256(original.data), keccak256(abi.encode(original.tokenAmounts)), keccak256(abi.encode(original.sourceTokenData)) ) ); } /// @notice Enum listing the possible message execution states within /// the offRamp contract. /// UNTOUCHED never executed /// IN_PROGRESS currently being executed, used a replay protection /// SUCCESS successfully executed. End state /// FAILURE unsuccessfully executed, manual execution is now enabled. /// @dev RMN depends on this enum, if changing, please notify the RMN maintainers. enum MessageExecutionState { UNTOUCHED, IN_PROGRESS, SUCCESS, FAILURE } }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity ^0.8.0; /// @notice Implements Token Bucket rate limiting. /// @dev uint128 is safe for rate limiter state. /// For USD value rate limiting, it can adequately store USD value in 18 decimals. /// For ERC20 token amount rate limiting, all tokens that will be listed will have at most /// a supply of uint128.max tokens, and it will therefore not overflow the bucket. /// In exceptional scenarios where tokens consumed may be larger than uint128, /// e.g. compromised issuer, an enabled RateLimiter will check and revert. library RateLimiter { error BucketOverfilled(); error OnlyCallableByAdminOrOwner(); error TokenMaxCapacityExceeded(uint256 capacity, uint256 requested, address tokenAddress); error TokenRateLimitReached(uint256 minWaitInSeconds, uint256 available, address tokenAddress); error AggregateValueMaxCapacityExceeded(uint256 capacity, uint256 requested); error AggregateValueRateLimitReached(uint256 minWaitInSeconds, uint256 available); event TokensConsumed(uint256 tokens); event ConfigChanged(Config config); struct TokenBucket { uint128 tokens; // ──────╮ Current number of tokens that are in the bucket. uint32 lastUpdated; // │ Timestamp in seconds of the last token refill, good for 100+ years. bool isEnabled; // ──────╯ Indication whether the rate limiting is enabled or not uint128 capacity; // ────╮ Maximum number of tokens that can be in the bucket. uint128 rate; // ────────╯ Number of tokens per second that the bucket is refilled. } struct Config { bool isEnabled; // Indication whether the rate limiting should be enabled uint128 capacity; // ────╮ Specifies the capacity of the rate limiter uint128 rate; // ───────╯ Specifies the rate of the rate limiter } /// @notice _consume removes the given tokens from the pool, lowering the /// rate tokens allowed to be consumed for subsequent calls. /// @param requestTokens The total tokens to be consumed from the bucket. /// @param tokenAddress The token to consume capacity for, use 0x0 to indicate aggregate value capacity. /// @dev Reverts when requestTokens exceeds bucket capacity or available tokens in the bucket /// @dev emits removal of requestTokens if requestTokens is > 0 function _consume(TokenBucket storage s_bucket, uint256 requestTokens, address tokenAddress) internal { // If there is no value to remove or rate limiting is turned off, skip this step to reduce gas usage if (!s_bucket.isEnabled || requestTokens == 0) { return; } uint256 tokens = s_bucket.tokens; uint256 capacity = s_bucket.capacity; uint256 timeDiff = block.timestamp - s_bucket.lastUpdated; if (timeDiff != 0) { if (tokens > capacity) revert BucketOverfilled(); // Refill tokens when arriving at a new block time tokens = _calculateRefill(capacity, tokens, timeDiff, s_bucket.rate); s_bucket.lastUpdated = uint32(block.timestamp); } if (capacity < requestTokens) { // Token address 0 indicates consuming aggregate value rate limit capacity. if (tokenAddress == address(0)) revert AggregateValueMaxCapacityExceeded(capacity, requestTokens); revert TokenMaxCapacityExceeded(capacity, requestTokens, tokenAddress); } if (tokens < requestTokens) { uint256 rate = s_bucket.rate; // Wait required until the bucket is refilled enough to accept this value, round up to next higher second // Consume is not guaranteed to succeed after wait time passes if there is competing traffic. // This acts as a lower bound of wait time. uint256 minWaitInSeconds = ((requestTokens - tokens) + (rate - 1)) / rate; if (tokenAddress == address(0)) revert AggregateValueRateLimitReached(minWaitInSeconds, tokens); revert TokenRateLimitReached(minWaitInSeconds, tokens, tokenAddress); } tokens -= requestTokens; // Downcast is safe here, as tokens is not larger than capacity s_bucket.tokens = uint128(tokens); emit TokensConsumed(requestTokens); } /// @notice Gets the token bucket with its values for the block it was requested at. /// @return The token bucket. function _currentTokenBucketState(TokenBucket memory bucket) internal view returns (TokenBucket memory) { // We update the bucket to reflect the status at the exact time of the // call. This means we might need to refill a part of the bucket based // on the time that has passed since the last update. bucket.tokens = uint128( _calculateRefill(bucket.capacity, bucket.tokens, block.timestamp - bucket.lastUpdated, bucket.rate) ); bucket.lastUpdated = uint32(block.timestamp); return bucket; } /// @notice Sets the rate limited config. /// @param s_bucket The token bucket /// @param config The new config function _setTokenBucketConfig(TokenBucket storage s_bucket, Config memory config) internal { // First update the bucket to make sure the proper rate is used for all the time // up until the config change. uint256 timeDiff = block.timestamp - s_bucket.lastUpdated; if (timeDiff != 0) { s_bucket.tokens = uint128(_calculateRefill(s_bucket.capacity, s_bucket.tokens, timeDiff, s_bucket.rate)); s_bucket.lastUpdated = uint32(block.timestamp); } s_bucket.tokens = uint128(_min(config.capacity, s_bucket.tokens)); s_bucket.isEnabled = config.isEnabled; s_bucket.capacity = config.capacity; s_bucket.rate = config.rate; emit ConfigChanged(config); } /// @notice Calculate refilled tokens /// @param capacity bucket capacity /// @param tokens current bucket tokens /// @param timeDiff block time difference since last refill /// @param rate bucket refill rate /// @return the value of tokens after refill function _calculateRefill( uint256 capacity, uint256 tokens, uint256 timeDiff, uint256 rate ) private pure returns (uint256) { return _min(capacity, tokens + timeDiff * rate); } /// @notice Return the smallest of two integers /// @param a first int /// @param b second int /// @return smallest function _min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity ^0.8.0; library USDPriceWith18Decimals { /// @notice Takes a price in USD, with 18 decimals per 1e18 token amount, /// and amount of the smallest token denomination, /// calculates the value in USD with 18 decimals. /// @param tokenPrice The USD price of the token. /// @param tokenAmount Amount of the smallest token denomination. /// @return USD value with 18 decimals. /// @dev this function assumes that no more than 1e59 US dollar worth of token is passed in. /// If more is sent, this function will overflow and revert. /// Since there isn't even close to 1e59 dollars, this is ok for all legit tokens. function _calcUSDValueFromTokenAmount(uint224 tokenPrice, uint256 tokenAmount) internal pure returns (uint256) { /// LINK Example: /// tokenPrice: 8e18 -> $8/LINK, as 1e18 token amount is 1 LINK, worth 8 USD, or 8e18 with 18 decimals /// tokenAmount: 2e18 -> 2 LINK /// result: 8e18 * 2e18 / 1e18 -> 16e18 with 18 decimals = $16 /// USDC Example: /// tokenPrice: 1e30 -> $1/USDC, as 1e18 token amount is 1e12 USDC, worth 1e12 USD, or 1e30 with 18 decimals /// tokenAmount: 5e6 -> 5 USDC /// result: 1e30 * 5e6 / 1e18 -> 5e18 with 18 decimals = $5 return (tokenPrice * tokenAmount) / 1e18; } /// @notice Takes a price in USD, with 18 decimals per 1e18 token amount, /// and USD value with 18 decimals, /// calculates amount of the smallest token denomination. /// @param tokenPrice The USD price of the token. /// @param usdValue USD value with 18 decimals. /// @return Amount of the smallest token denomination. function _calcTokenAmountFromUSDValue(uint224 tokenPrice, uint256 usdValue) internal pure returns (uint256) { /// LINK Example: /// tokenPrice: 8e18 -> $8/LINK, as 1e18 token amount is 1 LINK, worth 8 USD, or 8e18 with 18 decimals /// usdValue: 16e18 -> $16 /// result: 16e18 * 1e18 / 8e18 -> 2e18 = 2 LINK /// USDC Example: /// tokenPrice: 1e30 -> $1/USDC, as 1e18 token amount is 1e12 USDC, worth 1e12 USD, or 1e30 with 18 decimals /// usdValue: 5e18 -> $5 /// result: 5e18 * 1e18 / 1e30 -> 5e6 = 5 USDC return (usdValue * 1e18) / tokenPrice; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import {EnumerableMap} from "../../vendor/openzeppelin-solidity/v4.8.0/contracts/utils/structs/EnumerableMap.sol"; library EnumerableMapAddresses { using EnumerableMap for EnumerableMap.UintToAddressMap; struct AddressToAddressMap { EnumerableMap.UintToAddressMap _inner; } // solhint-disable-next-line chainlink-solidity/prefix-internal-functions-with-underscore function set(AddressToAddressMap storage map, address key, address value) internal returns (bool) { return map._inner.set(uint256(uint160(key)), value); } // solhint-disable-next-line chainlink-solidity/prefix-internal-functions-with-underscore function remove(AddressToAddressMap storage map, address key) internal returns (bool) { return map._inner.remove(uint256(uint160(key))); } // solhint-disable-next-line chainlink-solidity/prefix-internal-functions-with-underscore function contains(AddressToAddressMap storage map, address key) internal view returns (bool) { return map._inner.contains(uint256(uint160(key))); } // solhint-disable-next-line chainlink-solidity/prefix-internal-functions-with-underscore function length(AddressToAddressMap storage map) internal view returns (uint256) { return map._inner.length(); } // solhint-disable-next-line chainlink-solidity/prefix-internal-functions-with-underscore function at(AddressToAddressMap storage map, uint256 index) internal view returns (address, address) { (uint256 key, address value) = map._inner.at(index); return (address(uint160(key)), value); } // solhint-disable-next-line chainlink-solidity/prefix-internal-functions-with-underscore function tryGet(AddressToAddressMap storage map, address key) internal view returns (bool, address) { return map._inner.tryGet(uint256(uint160(key))); } // solhint-disable-next-line chainlink-solidity/prefix-internal-functions-with-underscore function get(AddressToAddressMap storage map, address key) internal view returns (address) { return map._inner.get(uint256(uint160(key))); } // solhint-disable-next-line chainlink-solidity/prefix-internal-functions-with-underscore function get( AddressToAddressMap storage map, address key, string memory errorMessage ) internal view returns (address) { return map._inner.get(uint256(uint160(key)), errorMessage); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; import "../extensions/draft-IERC20Permit.sol"; import "../../../utils/Address.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using Address for address; 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)); } } function safePermit( IERC20Permit token, address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) internal { uint256 nonceBefore = token.nonces(owner); token.permit(owner, spender, value, deadline, v, r, s); uint256 nonceAfter = token.nonces(owner); require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed"); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); 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 (last updated v4.6.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address from, address to, uint256 amount) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/structs/EnumerableMap.sol) // This file was procedurally generated from scripts/generate/templates/EnumerableMap.js. pragma solidity ^0.8.0; import "./EnumerableSet.sol"; /** * @dev Library for managing an enumerable variant of Solidity's * https://solidity.readthedocs.io/en/latest/types.html#mapping-types[`mapping`] * type. * * Maps have the following properties: * * - Entries are added, removed, and checked for existence in constant time * (O(1)). * - Entries are enumerated in O(n). No guarantees are made on the ordering. * * ``` * contract Example { * // Add the library methods * using EnumerableMap for EnumerableMap.UintToAddressMap; * * // Declare a set state variable * EnumerableMap.UintToAddressMap private myMap; * } * ``` * * The following map types are supported: * * - `uint256 -> address` (`UintToAddressMap`) since v3.0.0 * - `address -> uint256` (`AddressToUintMap`) since v4.6.0 * - `bytes32 -> bytes32` (`Bytes32ToBytes32Map`) since v4.6.0 * - `uint256 -> uint256` (`UintToUintMap`) since v4.7.0 * - `bytes32 -> uint256` (`Bytes32ToUintMap`) since v4.7.0 * * [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 EnumerableMap, you can either remove all elements one by one or create a fresh instance using an * array of EnumerableMap. * ==== */ library EnumerableMap { using EnumerableSet for EnumerableSet.Bytes32Set; // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Map type with // bytes32 keys and values. // The Map implementation uses private functions, and user-facing // implementations (such as Uint256ToAddressMap) are just wrappers around // the underlying Map. // This means that we can only create new EnumerableMaps for types that fit // in bytes32. struct Bytes32ToBytes32Map { // Storage of keys EnumerableSet.Bytes32Set _keys; mapping(bytes32 => bytes32) _values; } /** * @dev Adds a key-value pair to a map, or updates the value for an existing * key. O(1). * * Returns true if the key was added to the map, that is if it was not * already present. */ function set( Bytes32ToBytes32Map storage map, bytes32 key, bytes32 value ) internal returns (bool) { map._values[key] = value; return map._keys.add(key); } /** * @dev Removes a key-value pair from a map. O(1). * * Returns true if the key was removed from the map, that is if it was present. */ function remove(Bytes32ToBytes32Map storage map, bytes32 key) internal returns (bool) { delete map._values[key]; return map._keys.remove(key); } /** * @dev Returns true if the key is in the map. O(1). */ function contains(Bytes32ToBytes32Map storage map, bytes32 key) internal view returns (bool) { return map._keys.contains(key); } /** * @dev Returns the number of key-value pairs in the map. O(1). */ function length(Bytes32ToBytes32Map storage map) internal view returns (uint256) { return map._keys.length(); } /** * @dev Returns the key-value pair stored at position `index` in the map. O(1). * * Note that there are no guarantees on the ordering of entries inside the * array, and it may change when more entries are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(Bytes32ToBytes32Map storage map, uint256 index) internal view returns (bytes32, bytes32) { bytes32 key = map._keys.at(index); return (key, map._values[key]); } /** * @dev Tries to returns the value associated with `key`. O(1). * Does not revert if `key` is not in the map. */ function tryGet(Bytes32ToBytes32Map storage map, bytes32 key) internal view returns (bool, bytes32) { bytes32 value = map._values[key]; if (value == bytes32(0)) { return (contains(map, key), bytes32(0)); } else { return (true, value); } } /** * @dev Returns the value associated with `key`. O(1). * * Requirements: * * - `key` must be in the map. */ function get(Bytes32ToBytes32Map storage map, bytes32 key) internal view returns (bytes32) { bytes32 value = map._values[key]; require(value != 0 || contains(map, key), "EnumerableMap: nonexistent key"); return value; } /** * @dev Same as {get}, with a custom error message when `key` is not in the map. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryGet}. */ function get( Bytes32ToBytes32Map storage map, bytes32 key, string memory errorMessage ) internal view returns (bytes32) { bytes32 value = map._values[key]; require(value != 0 || contains(map, key), errorMessage); return value; } // UintToUintMap struct UintToUintMap { Bytes32ToBytes32Map _inner; } /** * @dev Adds a key-value pair to a map, or updates the value for an existing * key. O(1). * * Returns true if the key was added to the map, that is if it was not * already present. */ function set( UintToUintMap storage map, uint256 key, uint256 value ) internal returns (bool) { return set(map._inner, bytes32(key), bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the key was removed from the map, that is if it was present. */ function remove(UintToUintMap storage map, uint256 key) internal returns (bool) { return remove(map._inner, bytes32(key)); } /** * @dev Returns true if the key is in the map. O(1). */ function contains(UintToUintMap storage map, uint256 key) internal view returns (bool) { return contains(map._inner, bytes32(key)); } /** * @dev Returns the number of elements in the map. O(1). */ function length(UintToUintMap storage map) internal view returns (uint256) { return length(map._inner); } /** * @dev Returns the element 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(UintToUintMap storage map, uint256 index) internal view returns (uint256, uint256) { (bytes32 key, bytes32 value) = at(map._inner, index); return (uint256(key), uint256(value)); } /** * @dev Tries to returns the value associated with `key`. O(1). * Does not revert if `key` is not in the map. */ function tryGet(UintToUintMap storage map, uint256 key) internal view returns (bool, uint256) { (bool success, bytes32 value) = tryGet(map._inner, bytes32(key)); return (success, uint256(value)); } /** * @dev Returns the value associated with `key`. O(1). * * Requirements: * * - `key` must be in the map. */ function get(UintToUintMap storage map, uint256 key) internal view returns (uint256) { return uint256(get(map._inner, bytes32(key))); } /** * @dev Same as {get}, with a custom error message when `key` is not in the map. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryGet}. */ function get( UintToUintMap storage map, uint256 key, string memory errorMessage ) internal view returns (uint256) { return uint256(get(map._inner, bytes32(key), errorMessage)); } // UintToAddressMap struct UintToAddressMap { Bytes32ToBytes32Map _inner; } /** * @dev Adds a key-value pair to a map, or updates the value for an existing * key. O(1). * * Returns true if the key was added to the map, that is if it was not * already present. */ function set( UintToAddressMap storage map, uint256 key, address value ) internal returns (bool) { return set(map._inner, bytes32(key), bytes32(uint256(uint160(value)))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the key was removed from the map, that is if it was present. */ function remove(UintToAddressMap storage map, uint256 key) internal returns (bool) { return remove(map._inner, bytes32(key)); } /** * @dev Returns true if the key is in the map. O(1). */ function contains(UintToAddressMap storage map, uint256 key) internal view returns (bool) { return contains(map._inner, bytes32(key)); } /** * @dev Returns the number of elements in the map. O(1). */ function length(UintToAddressMap storage map) internal view returns (uint256) { return length(map._inner); } /** * @dev Returns the element 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(UintToAddressMap storage map, uint256 index) internal view returns (uint256, address) { (bytes32 key, bytes32 value) = at(map._inner, index); return (uint256(key), address(uint160(uint256(value)))); } /** * @dev Tries to returns the value associated with `key`. O(1). * Does not revert if `key` is not in the map. */ function tryGet(UintToAddressMap storage map, uint256 key) internal view returns (bool, address) { (bool success, bytes32 value) = tryGet(map._inner, bytes32(key)); return (success, address(uint160(uint256(value)))); } /** * @dev Returns the value associated with `key`. O(1). * * Requirements: * * - `key` must be in the map. */ function get(UintToAddressMap storage map, uint256 key) internal view returns (address) { return address(uint160(uint256(get(map._inner, bytes32(key))))); } /** * @dev Same as {get}, with a custom error message when `key` is not in the map. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryGet}. */ function get( UintToAddressMap storage map, uint256 key, string memory errorMessage ) internal view returns (address) { return address(uint160(uint256(get(map._inner, bytes32(key), errorMessage)))); } // AddressToUintMap struct AddressToUintMap { Bytes32ToBytes32Map _inner; } /** * @dev Adds a key-value pair to a map, or updates the value for an existing * key. O(1). * * Returns true if the key was added to the map, that is if it was not * already present. */ function set( AddressToUintMap storage map, address key, uint256 value ) internal returns (bool) { return set(map._inner, bytes32(uint256(uint160(key))), bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the key was removed from the map, that is if it was present. */ function remove(AddressToUintMap storage map, address key) internal returns (bool) { return remove(map._inner, bytes32(uint256(uint160(key)))); } /** * @dev Returns true if the key is in the map. O(1). */ function contains(AddressToUintMap storage map, address key) internal view returns (bool) { return contains(map._inner, bytes32(uint256(uint160(key)))); } /** * @dev Returns the number of elements in the map. O(1). */ function length(AddressToUintMap storage map) internal view returns (uint256) { return length(map._inner); } /** * @dev Returns the element 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(AddressToUintMap storage map, uint256 index) internal view returns (address, uint256) { (bytes32 key, bytes32 value) = at(map._inner, index); return (address(uint160(uint256(key))), uint256(value)); } /** * @dev Tries to returns the value associated with `key`. O(1). * Does not revert if `key` is not in the map. */ function tryGet(AddressToUintMap storage map, address key) internal view returns (bool, uint256) { (bool success, bytes32 value) = tryGet(map._inner, bytes32(uint256(uint160(key)))); return (success, uint256(value)); } /** * @dev Returns the value associated with `key`. O(1). * * Requirements: * * - `key` must be in the map. */ function get(AddressToUintMap storage map, address key) internal view returns (uint256) { return uint256(get(map._inner, bytes32(uint256(uint160(key))))); } /** * @dev Same as {get}, with a custom error message when `key` is not in the map. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryGet}. */ function get( AddressToUintMap storage map, address key, string memory errorMessage ) internal view returns (uint256) { return uint256(get(map._inner, bytes32(uint256(uint160(key))), errorMessage)); } // Bytes32ToUintMap struct Bytes32ToUintMap { Bytes32ToBytes32Map _inner; } /** * @dev Adds a key-value pair to a map, or updates the value for an existing * key. O(1). * * Returns true if the key was added to the map, that is if it was not * already present. */ function set( Bytes32ToUintMap storage map, bytes32 key, uint256 value ) internal returns (bool) { return set(map._inner, key, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the key was removed from the map, that is if it was present. */ function remove(Bytes32ToUintMap storage map, bytes32 key) internal returns (bool) { return remove(map._inner, key); } /** * @dev Returns true if the key is in the map. O(1). */ function contains(Bytes32ToUintMap storage map, bytes32 key) internal view returns (bool) { return contains(map._inner, key); } /** * @dev Returns the number of elements in the map. O(1). */ function length(Bytes32ToUintMap storage map) internal view returns (uint256) { return length(map._inner); } /** * @dev Returns the element 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(Bytes32ToUintMap storage map, uint256 index) internal view returns (bytes32, uint256) { (bytes32 key, bytes32 value) = at(map._inner, index); return (key, uint256(value)); } /** * @dev Tries to returns the value associated with `key`. O(1). * Does not revert if `key` is not in the map. */ function tryGet(Bytes32ToUintMap storage map, bytes32 key) internal view returns (bool, uint256) { (bool success, bytes32 value) = tryGet(map._inner, key); return (success, uint256(value)); } /** * @dev Returns the value associated with `key`. O(1). * * Requirements: * * - `key` must be in the map. */ function get(Bytes32ToUintMap storage map, bytes32 key) internal view returns (uint256) { return uint256(get(map._inner, key)); } /** * @dev Same as {get}, with a custom error message when `key` is not in the map. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryGet}. */ function get( Bytes32ToUintMap storage map, bytes32 key, string memory errorMessage ) internal view returns (uint256) { return uint256(get(map._inner, key, errorMessage)); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import {ConfirmedOwner} from "./ConfirmedOwner.sol"; /// @title The OwnerIsCreator contract /// @notice A contract with helpers for basic contract ownership. contract OwnerIsCreator is ConfirmedOwner { constructor() ConfirmedOwner(msg.sender) {} }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity ^0.8.0; library MerkleMultiProof { /// @notice Leaf domain separator, should be used as the first 32 bytes of a leaf's preimage. bytes32 internal constant LEAF_DOMAIN_SEPARATOR = 0x0000000000000000000000000000000000000000000000000000000000000000; /// @notice Internal domain separator, should be used as the first 32 bytes of an internal node's preiimage. bytes32 internal constant INTERNAL_DOMAIN_SEPARATOR = 0x0000000000000000000000000000000000000000000000000000000000000001; uint256 internal constant MAX_NUM_HASHES = 256; error InvalidProof(); error LeavesCannotBeEmpty(); /// @notice Computes the root based on provided pre-hashed leaf nodes in /// leaves, internal nodes in proofs, and using proofFlagBits' i-th bit to /// determine if an element of proofs or one of the previously computed leafs /// or internal nodes will be used for the i-th hash. /// @param leaves Should be pre-hashed and the first 32 bytes of a leaf's /// preimage should match LEAF_DOMAIN_SEPARATOR. /// @param proofs The hashes to be used instead of a leaf hash when the proofFlagBits /// indicates a proof should be used. /// @param proofFlagBits A single uint256 of which each bit indicates whether a leaf or /// a proof needs to be used in a hash operation. /// @dev the maximum number of hash operations it set to 256. Any input that would require /// more than 256 hashes to get to a root will revert. /// @dev For given input `leaves` = [a,b,c] `proofs` = [D] and `proofFlagBits` = 5 /// totalHashes = 3 + 1 - 1 = 3 /// ** round 1 ** /// proofFlagBits = (5 >> 0) & 1 = true /// hashes[0] = hashPair(a, b) /// (leafPos, hashPos, proofPos) = (2, 0, 0); /// /// ** round 2 ** /// proofFlagBits = (5 >> 1) & 1 = false /// hashes[1] = hashPair(D, c) /// (leafPos, hashPos, proofPos) = (3, 0, 1); /// /// ** round 3 ** /// proofFlagBits = (5 >> 2) & 1 = true /// hashes[2] = hashPair(hashes[0], hashes[1]) /// (leafPos, hashPos, proofPos) = (3, 2, 1); /// /// i = 3 and no longer < totalHashes. The algorithm is done /// return hashes[totalHashes - 1] = hashes[2]; the last hash we computed. // We mark this function as internal to force it to be inlined in contracts // that use it, but semantically it is public. // solhint-disable-next-line chainlink-solidity/prefix-internal-functions-with-underscore function merkleRoot( bytes32[] memory leaves, bytes32[] memory proofs, uint256 proofFlagBits ) internal pure returns (bytes32) { unchecked { uint256 leavesLen = leaves.length; uint256 proofsLen = proofs.length; if (leavesLen == 0) revert LeavesCannotBeEmpty(); if (!(leavesLen <= MAX_NUM_HASHES + 1 && proofsLen <= MAX_NUM_HASHES + 1)) revert InvalidProof(); uint256 totalHashes = leavesLen + proofsLen - 1; if (!(totalHashes <= MAX_NUM_HASHES)) revert InvalidProof(); if (totalHashes == 0) { return leaves[0]; } bytes32[] memory hashes = new bytes32[](totalHashes); (uint256 leafPos, uint256 hashPos, uint256 proofPos) = (0, 0, 0); for (uint256 i = 0; i < totalHashes; ++i) { // Checks if the bit flag signals the use of a supplied proof or a leaf/previous hash. bytes32 a; if (proofFlagBits & (1 << i) == (1 << i)) { // Use a leaf or a previously computed hash. if (leafPos < leavesLen) { a = leaves[leafPos++]; } else { a = hashes[hashPos++]; } } else { // Use a supplied proof. a = proofs[proofPos++]; } // The second part of the hashed pair is never a proof as hashing two proofs would result in a // hash that can already be computed offchain. bytes32 b; if (leafPos < leavesLen) { b = leaves[leafPos++]; } else { b = hashes[hashPos++]; } if (!(hashPos <= i)) revert InvalidProof(); hashes[i] = _hashPair(a, b); } if (!(hashPos == totalHashes - 1 && leafPos == leavesLen && proofPos == proofsLen)) revert InvalidProof(); // Return the last hash. return hashes[totalHashes - 1]; } } /// @notice Hashes two bytes32 objects in their given order, prepended by the /// INTERNAL_DOMAIN_SEPARATOR. function _hashInternalNode(bytes32 left, bytes32 right) private pure returns (bytes32 hash) { return keccak256(abi.encode(INTERNAL_DOMAIN_SEPARATOR, left, right)); } /// @notice Hashes two bytes32 objects. The order is taken into account, /// using the lower value first. function _hashPair(bytes32 a, bytes32 b) private pure returns (bytes32) { return a < b ? _hashInternalNode(a, b) : _hashInternalNode(b, a); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612]. * * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't * need to send a transaction, and thus is not required to hold Ether at all. */ interface IERC20Permit { /** * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens, * given ``owner``'s signed approval. * * IMPORTANT: The same issues {IERC20-approve} has related to transaction * ordering also apply here. * * Emits an {Approval} event. * * Requirements: * * - `spender` cannot be the zero address. * - `deadline` must be a timestamp in the future. * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner` * over the EIP712-formatted function arguments. * - the signature must use ``owner``'s current nonce (see {nonces}). * * For more information on the signature format, see the * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP * section]. */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @dev Returns the current nonce for `owner`. This value must be * included whenever a signature is generated for {permit}. * * Every successful call to {permit} increases ``owner``'s nonce by one. This * prevents a signature from being used multiple times. */ function nonces(address owner) external view returns (uint256); /** * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view returns (bytes32); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (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 functionCallWithValue(target, data, 0, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/structs/EnumerableSet.sol) // This file was procedurally generated from scripts/generate/templates/EnumerableSet.js. pragma solidity ^0.8.0; /** * @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. * * ``` * 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 of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping(bytes32 => uint256) _indexes; } /** * @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._indexes[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 read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 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 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; if (lastIndex != toDeleteIndex) { bytes32 lastValue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastValue; // Update the index for the moved value set._indexes[lastValue] = valueIndex; // Replace lastValue's index to valueIndex } // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[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._indexes[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 pragma solidity ^0.8.0; import {ConfirmedOwnerWithProposal} from "./ConfirmedOwnerWithProposal.sol"; /** * @title The ConfirmedOwner contract * @notice A contract with helpers for basic contract ownership. */ contract ConfirmedOwner is ConfirmedOwnerWithProposal { constructor(address newOwner) ConfirmedOwnerWithProposal(newOwner, address(0)) {} }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import {IOwnable} from "../interfaces/IOwnable.sol"; /** * @title The ConfirmedOwner contract * @notice A contract with helpers for basic contract ownership. */ contract ConfirmedOwnerWithProposal is IOwnable { address private s_owner; address private s_pendingOwner; event OwnershipTransferRequested(address indexed from, address indexed to); event OwnershipTransferred(address indexed from, address indexed to); constructor(address newOwner, address pendingOwner) { // solhint-disable-next-line custom-errors require(newOwner != address(0), "Cannot set owner to zero"); s_owner = newOwner; if (pendingOwner != address(0)) { _transferOwnership(pendingOwner); } } /** * @notice Allows an owner to begin transferring ownership to a new address, * pending. */ function transferOwnership(address to) public override onlyOwner { _transferOwnership(to); } /** * @notice Allows an ownership transfer to be completed by the recipient. */ function acceptOwnership() external override { // solhint-disable-next-line custom-errors require(msg.sender == s_pendingOwner, "Must be proposed owner"); address oldOwner = s_owner; s_owner = msg.sender; s_pendingOwner = address(0); emit OwnershipTransferred(oldOwner, msg.sender); } /** * @notice Get the current owner */ function owner() public view override returns (address) { return s_owner; } /** * @notice validate, transfer ownership, and emit relevant events */ function _transferOwnership(address to) private { // solhint-disable-next-line custom-errors require(to != msg.sender, "Cannot transfer to self"); s_pendingOwner = to; emit OwnershipTransferRequested(s_owner, to); } /** * @notice validate access */ function _validateOwnership() internal view { // solhint-disable-next-line custom-errors require(msg.sender == s_owner, "Only callable by owner"); } /** * @notice Reverts if called by anyone other than the contract owner. */ modifier onlyOwner() { _validateOwnership(); _; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface IOwnable { function owner() external returns (address); function transferOwnership(address recipient) external; function acceptOwnership() external; }
{ "remappings": [ "ds-test/=foundry-lib/forge-std/lib/ds-test/src/", "forge-std/=foundry-lib/forge-std/src/", "@openzeppelin/=node_modules/@openzeppelin/", "hardhat/=node_modules/hardhat/", "@eth-optimism/=node_modules/@eth-optimism/", "@ensdomains/=node_modules/@ensdomains/", "eth-gas-reporter/=node_modules/eth-gas-reporter/" ], "optimizer": { "enabled": true, "runs": 10000 }, "metadata": { "useLiteralContent": false, "bytecodeHash": "none", "appendCBOR": true }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "evmVersion": "paris", "libraries": {} }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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IPool","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"}],"name":"getSenderNonce","outputs":[{"internalType":"uint64","name":"","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getStaticConfig","outputs":[{"components":[{"internalType":"address","name":"linkToken","type":"address"},{"internalType":"uint64","name":"chainSelector","type":"uint64"},{"internalType":"uint64","name":"destChainSelector","type":"uint64"},{"internalType":"uint64","name":"defaultTxGasLimit","type":"uint64"},{"internalType":"uint96","name":"maxNopFeesJuels","type":"uint96"},{"internalType":"address","name":"prevOnRamp","type":"address"},{"internalType":"address","name":"armProxy","type":"address"}],"internalType":"struct EVM2EVMOnRamp.StaticConfig","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint64","name":"","type":"uint64"}],"name":"getSupportedTokens","outputs":[{"internalType":"address[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getTokenLimitAdmin","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"getTokenTransferFeeConfig","outputs":[{"components":[{"internalType":"uint32","name":"minFeeUSDCents","type":"uint32"},{"internalType":"uint32","name":"maxFeeUSDCents","type":"uint32"},{"internalType":"uint16","name":"deciBps","type":"uint16"},{"internalType":"uint32","name":"destGasOverhead","type":"uint32"},{"internalType":"uint32","name":"destBytesOverhead","type":"uint32"}],"internalType":"struct EVM2EVMOnRamp.TokenTransferFeeConfig","name":"tokenTransferFeeConfig","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"linkAvailableForPayment","outputs":[{"internalType":"int256","name":"","type":"int256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"payNops","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newAdmin","type":"address"}],"name":"setAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"router","type":"address"},{"internalType":"uint16","name":"maxNumberOfTokensPerMsg","type":"uint16"},{"internalType":"uint32","name":"destGasOverhead","type":"uint32"},{"internalType":"uint16","name":"destGasPerPayloadByte","type":"uint16"},{"internalType":"uint32","name":"destDataAvailabilityOverheadGas","type":"uint32"},{"internalType":"uint16","name":"destGasPerDataAvailabilityByte","type":"uint16"},{"internalType":"uint16","name":"destDataAvailabilityMultiplierBps","type":"uint16"},{"internalType":"address","name":"priceRegistry","type":"address"},{"internalType":"uint32","name":"maxDataBytes","type":"uint32"},{"internalType":"uint32","name":"maxPerMsgGasLimit","type":"uint32"}],"internalType":"struct EVM2EVMOnRamp.DynamicConfig","name":"dynamicConfig","type":"tuple"}],"name":"setDynamicConfig","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint32","name":"networkFeeUSDCents","type":"uint32"},{"internalType":"uint64","name":"gasMultiplierWeiPerEth","type":"uint64"},{"internalType":"uint64","name":"premiumMultiplierWeiPerEth","type":"uint64"},{"internalType":"bool","name":"enabled","type":"bool"}],"internalType":"struct EVM2EVMOnRamp.FeeTokenConfigArgs[]","name":"feeTokenConfigArgs","type":"tuple[]"}],"name":"setFeeTokenConfig","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"nop","type":"address"},{"internalType":"uint16","name":"weight","type":"uint16"}],"internalType":"struct EVM2EVMOnRamp.NopAndWeight[]","name":"nopsAndWeights","type":"tuple[]"}],"name":"setNops","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"bool","name":"isEnabled","type":"bool"},{"internalType":"uint128","name":"capacity","type":"uint128"},{"internalType":"uint128","name":"rate","type":"uint128"}],"internalType":"struct RateLimiter.Config","name":"config","type":"tuple"}],"name":"setRateLimiterConfig","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint32","name":"minFeeUSDCents","type":"uint32"},{"internalType":"uint32","name":"maxFeeUSDCents","type":"uint32"},{"internalType":"uint16","name":"deciBps","type":"uint16"},{"internalType":"uint32","name":"destGasOverhead","type":"uint32"},{"internalType":"uint32","name":"destBytesOverhead","type":"uint32"}],"internalType":"struct EVM2EVMOnRamp.TokenTransferFeeConfigArgs[]","name":"tokenTransferFeeConfigArgs","type":"tuple[]"}],"name":"setTokenTransferFeeConfig","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"typeAndVersion","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"feeToken","type":"address"},{"internalType":"address","name":"to","type":"address"}],"name":"withdrawNonLinkFees","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Deployed Bytecode
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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.