47 lines
1.6 KiB
Solidity
47 lines
1.6 KiB
Solidity
// SPDX-License-Identifier: MIT
|
|
// OpenZeppelin Contracts (last updated v4.5.0-rc.0) (utils/Multicall.sol)
|
|
|
|
pragma solidity ^0.8.0;
|
|
|
|
import "./AddressUpgradeable.sol";
|
|
import "../proxy/utils/Initializable.sol";
|
|
|
|
/**
|
|
* @dev Provides a function to batch together multiple calls in a single external call.
|
|
*
|
|
* _Available since v4.1._
|
|
*/
|
|
abstract contract MulticallUpgradeable is Initializable {
|
|
function __Multicall_init() internal onlyInitializing {
|
|
__Multicall_init_unchained();
|
|
}
|
|
|
|
function __Multicall_init_unchained() internal onlyInitializing {
|
|
}
|
|
/**
|
|
* @dev Receives and executes a batch of function calls on this contract.
|
|
*/
|
|
function multicall(bytes[] calldata data) external virtual returns (bytes[] memory results) {
|
|
results = new bytes[](data.length);
|
|
for (uint256 i = 0; i < data.length; i++) {
|
|
results[i] = _functionDelegateCall(address(this), data[i]);
|
|
}
|
|
return results;
|
|
}
|
|
|
|
/**
|
|
* @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) private returns (bytes memory) {
|
|
require(AddressUpgradeable.isContract(target), "Address: delegate call to non-contract");
|
|
|
|
// solhint-disable-next-line avoid-low-level-calls
|
|
(bool success, bytes memory returndata) = target.delegatecall(data);
|
|
return AddressUpgradeable.verifyCallResult(success, returndata, "Address: low-level delegate call failed");
|
|
}
|
|
uint256[50] private __gap;
|
|
}
|