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37 lines
1.7 KiB
37 lines
1.7 KiB
// SPDX-License-Identifier: MIT
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// OpenZeppelin Contracts (last updated v5.0.1) (utils/Multicall.sol)
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pragma solidity ^0.8.20;
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import {Address} from "./Address.sol";
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import {Context} from "./Context.sol";
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/**
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* @dev Provides a function to batch together multiple calls in a single external call.
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*
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* Consider any assumption about calldata validation performed by the sender may be violated if it's not especially
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* careful about sending transactions invoking {multicall}. For example, a relay address that filters function
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* selectors won't filter calls nested within a {multicall} operation.
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*
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* NOTE: Since 5.0.1 and 4.9.4, this contract identifies non-canonical contexts (i.e. `msg.sender` is not {_msgSender}).
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* If a non-canonical context is identified, the following self `delegatecall` appends the last bytes of `msg.data`
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* to the subcall. This makes it safe to use with {ERC2771Context}. Contexts that don't affect the resolution of
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* {_msgSender} are not propagated to subcalls.
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*/
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abstract contract Multicall is Context {
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/**
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* @dev Receives and executes a batch of function calls on this contract.
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* @custom:oz-upgrades-unsafe-allow-reachable delegatecall
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*/
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function multicall(bytes[] calldata data) external virtual returns (bytes[] memory results) {
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bytes memory context = msg.sender == _msgSender()
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? new bytes(0)
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: msg.data[msg.data.length - _contextSuffixLength():];
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results = new bytes[](data.length);
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for (uint256 i = 0; i < data.length; i++) {
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results[i] = Address.functionDelegateCall(address(this), bytes.concat(data[i], context));
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}
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return results;
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}
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}
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