// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; contract P256Probe { function probe(bytes32 h, uint256 r, uint256 s, uint256 x, uint256 y) external view returns (bool callOk, bytes memory ret) { bytes memory args = abi.encode(h, r, s, x, y); (callOk, ret) = address(0x100).staticcall(args); } }