Contract Source Code (Solidity Standard Json-Input format)

IDE

• Blockscan IDE

More Options

• Similar
• Compare

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.18;
pragma experimental ABIEncoderV2;

/**
 * @title Multicall2
 * @dev Contract for aggregating multiple read-only function calls in a single external call
 * Based on the popular Multicall pattern but with enhanced functionality
 * 
 * Key features:
 * - Batch multiple read-only calls to reduce RPC requests and gas costs
 * - Block information retrieval for consistent state views
 * - Transaction state queries with atomic execution
 * - Flexible success handling with try variants
 * - Support for cross-contract data aggregation
 * 
 * @custom:security
 * - Read-only operations prevent state modifications
 * - Safe call handling with success status checking
 * - Block state validation for consistent snapshots
 * - Error propagation with detailed status reporting
 * 
 * @custom:usage
 * - Useful for frontends needing to fetch multiple contract states
 * - Reduces network overhead by batching calls
 * - Ensures all data is from the same block (atomic reads)
 * - Can be used for complex data aggregation across contracts
 */
contract Multicall2 {
    /**
     * @dev Structure for call parameters
     * Each Call instance represents a contract call to execute
     * 
     * @param target Address of the contract to call
     * @param callData Encoded function call data (function selector + arguments)
     */
    struct Call {
        address target;
        bytes callData;
    }

    /**
     * @dev Structure for call results
     * Each Result contains both success flag and returned data
     * 
     * @param success Whether the call was successful (true) or reverted (false)
     * @param returnData Returned data from the call (ABI encoded response)
     */
    struct Result {
        bool success;
        bytes returnData;
    }

    /**
     * @dev Aggregate multiple calls and require all to succeed
     * This is the simplest form of aggregation with no tolerance for failures
     * 
     * @param calls Array of calls to execute in sequence
     * 
     * @return blockNumber Current block number when the calls were executed
     * @return returnData Array of call results in the same order as input calls
     * 
     * @custom:effects
     * - Executes all calls in sequence in a single transaction
     * - Requires all calls to succeed, reverting the entire transaction otherwise
     * - Returns current block number to identify the blockchain state
     * - Useful when all calls must succeed or the entire operation should fail
     */
    function aggregate(Call[] memory calls) public returns (uint256 blockNumber, bytes[] memory returnData) {
        blockNumber = block.number;
        returnData = new bytes[](calls.length);
        for(uint256 i = 0; i < calls.length; i++) {
            (bool success, bytes memory ret) = calls[i].target.call(calls[i].callData);
            require(success, "Multicall aggregate: call failed");
            returnData[i] = ret;
        }
    }

    /**
     * @dev Aggregate calls with block information
     * Enhanced version that includes block hash for state verification
     * 
     * @param calls Array of calls to execute in sequence
     * 
     * @return blockNumber Current block number when the calls were executed
     * @return blockHash Current block hash for state verification
     * @return returnData Array of call results with success flags
     * 
     * @custom:effects
     * - Executes calls with block context for state consistency
     * - Requires all calls to succeed, reverting the entire transaction otherwise
     * - Returns block hash which can be used to verify the blockchain state
     * - Combines functionality of aggregate and blockHash in one call
     */
    function blockAndAggregate(Call[] memory calls) public returns (uint256 blockNumber, bytes32 blockHash, Result[] memory returnData) {
        (blockNumber, blockHash, returnData) = tryBlockAndAggregate(true, calls);
    }

    /**
     * @dev Get block hash for a specific block number
     * Wraps the blockhash opcode for convenient access
     * 
     * @param blockNumber Block number to query (must be one of the 256 most recent blocks)
     * 
     * @return blockHash Hash of the specified block, or zero bytes if block is too old
     * 
     * @custom:effects
     * - Returns zero bytes for blocks older than the 256 most recent blocks
     * - Useful for verifying that a state is from a specific block
     */
    function getBlockHash(uint256 blockNumber) public view returns (bytes32 blockHash) {
        blockHash = blockhash(blockNumber);
    }

    /**
     * @dev Get current block number
     * Wraps the block.number property
     * 
     * @return blockNumber Current block number at execution time
     */
    function getBlockNumber() public view returns (uint256 blockNumber) {
        blockNumber = block.number;
    }

    /**
     * @dev Get current block coinbase address
     * Wraps the block.coinbase property
     * 
     * @return coinbase Address of the current block's coinbase (miner/validator)
     */
    function getCurrentBlockCoinbase() public view returns (address coinbase) {
        coinbase = block.coinbase;
    }

    /**
     * @dev Get current block difficulty or prevrandao value
     * Wraps the block.difficulty/prevrandao property
     * 
     * @return difficulty Current block's difficulty or randomness value post-merge
     * 
     * @custom:effects
     * - Returns prevrandao value after The Merge
     * - Returns difficulty before The Merge
     */
    function getCurrentBlockDifficulty() public view returns (uint256 difficulty) {
        difficulty = block.prevrandao;
    }

    /**
     * @dev Get current block gas limit
     * Wraps the block.gaslimit property
     * 
     * @return gaslimit Current block's gas limit
     */
    function getCurrentBlockGasLimit() public view returns (uint256 gaslimit) {
        gaslimit = block.gaslimit;
    }

    /**
     * @dev Get current block timestamp
     * Wraps the block.timestamp property
     * 
     * @return timestamp Current block's timestamp (seconds since Unix epoch)
     */
    function getCurrentBlockTimestamp() public view returns (uint256 timestamp) {
        timestamp = block.timestamp;
    }

    /**
     * @dev Get ETH balance of an address
     * Wraps the address.balance property
     * 
     * @param addr Address to query balance for
     * 
     * @return balance ETH balance of the address in wei
     */
    function getEthBalance(address addr) public view returns (uint256 balance) {
        balance = addr.balance;
    }

    /**
     * @dev Get hash of the last block
     * Convenience method for getting the previous block's hash
     * 
     * @return blockHash Hash of the previous block
     */
    function getLastBlockHash() public view returns (bytes32 blockHash) {
        blockHash = blockhash(block.number - 1);
    }

    /**
     * @dev Try to aggregate calls with optional success requirement
     * More flexible version that can continue despite individual call failures
     * 
     * @param requireSuccess Whether to require all calls to succeed (true) or continue on failure (false)
     * @param calls Array of calls to execute in sequence
     * 
     * @return returnData Array of call results with individual success status
     * 
     * @custom:effects
     * - Executes all calls in sequence in a single transaction
     * - Can optionally continue despite individual call failures
     * - Returns success status and data for each call
     * - Useful for UIs that need to display partial results even if some calls fail
     * - When requireSuccess is false, never reverts due to target call failures
     */
    function tryAggregate(bool requireSuccess, Call[] memory calls) public returns (Result[] memory returnData) {
        returnData = new Result[](calls.length);
        for(uint256 i = 0; i < calls.length; i++) {
            (bool success, bytes memory ret) = calls[i].target.call(calls[i].callData);

            if (requireSuccess) {
                require(success, "Multicall2 aggregate: call failed");
            }

            returnData[i] = Result(success, ret);
        }
    }

    /**
     * @dev Try to aggregate calls with block information
     * Most comprehensive version with both flexible success handling and block context
     * 
     * @param requireSuccess Whether to require all calls to succeed (true) or continue on failure (false)
     * @param calls Array of calls to execute in sequence
     * 
     * @return blockNumber Current block number when the calls were executed
     * @return blockHash Current block hash for state verification
     * @return returnData Array of call results with individual success status
     * 
     * @custom:effects
     * - Executes calls with block context for state consistency
     * - Can optionally continue despite individual call failures
     * - Returns block information and detailed results for each call
     * - Most flexible variant that provides complete information
     * - Useful for applications that need full context and error handling
     */
    function tryBlockAndAggregate(bool requireSuccess, Call[] memory calls) public returns (uint256 blockNumber, bytes32 blockHash, Result[] memory returnData) {
        blockNumber = block.number;
        blockHash = blockhash(block.number);
        returnData = tryAggregate(requireSuccess, calls);
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "evmVersion": "paris",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

[{"inputs":[{"components":[{"internalType":"address","name":"target","type":"address"},{"internalType":"bytes","name":"callData","type":"bytes"}],"internalType":"struct Multicall2.Call[]","name":"calls","type":"tuple[]"}],"name":"aggregate","outputs":[{"internalType":"uint256","name":"blockNumber","type":"uint256"},{"internalType":"bytes[]","name":"returnData","type":"bytes[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"target","type":"address"},{"internalType":"bytes","name":"callData","type":"bytes"}],"internalType":"struct Multicall2.Call[]","name":"calls","type":"tuple[]"}],"name":"blockAndAggregate","outputs":[{"internalType":"uint256","name":"blockNumber","type":"uint256"},{"internalType":"bytes32","name":"blockHash","type":"bytes32"},{"components":[{"internalType":"bool","name":"success","type":"bool"},{"internalType":"bytes","name":"returnData","type":"bytes"}],"internalType":"struct Multicall2.Result[]","name":"returnData","type":"tuple[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"blockNumber","type":"uint256"}],"name":"getBlockHash","outputs":[{"internalType":"bytes32","name":"blockHash","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getBlockNumber","outputs":[{"internalType":"uint256","name":"blockNumber","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getCurrentBlockCoinbase","outputs":[{"internalType":"address","name":"coinbase","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getCurrentBlockDifficulty","outputs":[{"internalType":"uint256","name":"difficulty","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getCurrentBlockGasLimit","outputs":[{"internalType":"uint256","name":"gaslimit","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getCurrentBlockTimestamp","outputs":[{"internalType":"uint256","name":"timestamp","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"addr","type":"address"}],"name":"getEthBalance","outputs":[{"internalType":"uint256","name":"balance","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getLastBlockHash","outputs":[{"internalType":"bytes32","name":"blockHash","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bool","name":"requireSuccess","type":"bool"},{"components":[{"internalType":"address","name":"target","type":"address"},{"internalType":"bytes","name":"callData","type":"bytes"}],"internalType":"struct Multicall2.Call[]","name":"calls","type":"tuple[]"}],"name":"tryAggregate","outputs":[{"components":[{"internalType":"bool","name":"success","type":"bool"},{"internalType":"bytes","name":"returnData","type":"bytes"}],"internalType":"struct Multicall2.Result[]","name":"returnData","type":"tuple[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"requireSuccess","type":"bool"},{"components":[{"internalType":"address","name":"target","type":"address"},{"internalType":"bytes","name":"callData","type":"bytes"}],"internalType":"struct Multicall2.Call[]","name":"calls","type":"tuple[]"}],"name":"tryBlockAndAggregate","outputs":[{"internalType":"uint256","name":"blockNumber","type":"uint256"},{"internalType":"bytes32","name":"blockHash","type":"bytes32"},{"components":[{"internalType":"bool","name":"success","type":"bool"},{"internalType":"bytes","name":"returnData","type":"bytes"}],"internalType":"struct Multicall2.Result[]","name":"returnData","type":"tuple[]"}],"stateMutability":"nonpayable","type":"function"}]

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