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61 changes: 61 additions & 0 deletions
61
darc-protocol/contracts/protocol/Utilities/ExternalValueReader.sol
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|---|---|---|
| @@ -0,0 +1,61 @@ | ||
| // SPDX-License-Identifier: BUSL-1.1 | ||
| pragma solidity ^0.8.19; | ||
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| library ExternalValueReader { | ||
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| function tryReadUINT256(address _contract, bytes memory _data) internal view returns (bool, uint256) { | ||
| (bool success, bytes memory returnData) = _contract.staticcall(_data); | ||
| if (!success) { | ||
| return (false, 0); | ||
| } | ||
| return (true, abi.decode(returnData, (uint256))); | ||
| } | ||
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| function tryReadAddress(address _contract, bytes memory _data) internal view returns (bool, address) { | ||
| (bool success, bytes memory returnData) = _contract.staticcall(_data); | ||
| if (!success) { | ||
| return (false, address(0)); | ||
| } | ||
| return (true, abi.decode(returnData, (address))); | ||
| } | ||
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| function tryReadBytes32(address _contract, bytes memory _data) internal view returns (bool, bytes32) { | ||
| (bool success, bytes memory returnData) = _contract.staticcall(_data); | ||
| if (!success) { | ||
| return (false, bytes32(0)); | ||
| } | ||
| return (true, abi.decode(returnData, (bytes32))); | ||
| } | ||
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| function tryReadBytes(address _contract, bytes memory _data) internal view returns (bool, bytes memory) { | ||
| (bool success, bytes memory returnData) = _contract.staticcall(_data); | ||
| if (!success) { | ||
| return (false, new bytes(0)); | ||
| } | ||
| return (true, returnData); | ||
| } | ||
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| function tryReadString(address _contract, bytes memory _data) internal view returns (bool, string memory) { | ||
| (bool success, bytes memory returnData) = _contract.staticcall(_data); | ||
| if (!success) { | ||
| return (false, ""); | ||
| } | ||
| return (true, abi.decode(returnData, (string))); | ||
| } | ||
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| function tryReadBool(address _contract, bytes memory _data) internal view returns (bool, bool) { | ||
| (bool success, bytes memory returnData) = _contract.staticcall(_data); | ||
| if (!success) { | ||
| return (false, false); | ||
| } | ||
| return (true, abi.decode(returnData, (bool))); | ||
| } | ||
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| function tryReadInt(address _contract, bytes memory _data) internal view returns (bool, int) { | ||
| (bool success, bytes memory returnData) = _contract.staticcall(_data); | ||
| if (!success) { | ||
| return (false, 0); | ||
| } | ||
| return (true, abi.decode(returnData, (int))); | ||
| } | ||
| } |
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