这三个参数可以合成一个传给合约然后在合约里面做分割

function test(address owner, address sender, uint256 amount, bytes calldata sign) public {
    bytes32 digest = keccak256(abi.encodePacked(keccak256(abi.encode(sender, amount))));
    require(ecrecovery(digest, sign) == owner, "Sign Validation Failed");
}

function ecrecovery(bytes32 hash, bytes memory sig) private pure returns (address) {
    bytes32 r;
    bytes32 s;
    uint8 v;

    if (sig.length != 65) {
    return address(0);
    }

    assembly {
    r := mload(add(sig, 32))
    s := mload(add(sig, 64))
    v := and(mload(add(sig, 65)), 255)
    }

    // https://github.com/ethereum/go-ethereum/issues/2053
    if (v < 27) {
    v += 27;
    }

    if (v != 27 && v != 28) {
    return address(0);
    }

    /* prefix might be needed for geth only
    * https://github.com/ethereum/go-ethereum/issues/3731
    */
    // bytes memory prefix = "\x19Ethereum Signed Message:\n32";
    // hash = sha3(prefix, hash);

    return ecrecover(hash, v, r, s);
}