52 lines
1.8 KiB
Solidity
52 lines
1.8 KiB
Solidity
// SPDX-License-Identifier: MIT
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// OpenZeppelin Contracts (last updated v4.5.0) (utils/Multicall.sol)
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pragma solidity ^0.8.0;
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import "./AddressUpgradeable.sol";
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import "../proxy/utils/Initializable.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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* _Available since v4.1._
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*/
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abstract contract MulticallUpgradeable is Initializable {
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function __Multicall_init() internal onlyInitializing {
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}
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function __Multicall_init_unchained() internal onlyInitializing {
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}
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/**
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* @dev Receives and executes a batch of function calls on this contract.
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*/
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function multicall(bytes[] calldata data) external virtual returns (bytes[] memory results) {
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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] = _functionDelegateCall(address(this), data[i]);
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}
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return results;
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}
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/**
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* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
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* but performing a delegate call.
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*
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* _Available since v3.4._
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*/
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function _functionDelegateCall(address target, bytes memory data) private returns (bytes memory) {
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require(AddressUpgradeable.isContract(target), "Address: delegate call to non-contract");
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// solhint-disable-next-line avoid-low-level-calls
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(bool success, bytes memory returndata) = target.delegatecall(data);
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return AddressUpgradeable.verifyCallResult(success, returndata, "Address: low-level delegate call failed");
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}
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/**
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* This empty reserved space is put in place to allow future versions to add new
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* variables without shifting down storage in the inheritance chain.
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* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
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*/
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uint256[50] private __gap;
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}
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