chapter19-code-3
Thu Mar 30 2023 11:29:58 GMT+0000 (Coordinated Universal Time)
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@RareSkills
contract ExampleContract {
function callAdd(address source, uint256 x, uint256 y) public returns (uint256) {
(bool ok, bytes memory result) = source.call(abi.encodeWithSignature("add(uint256,uint256)", x, y));
require(ok, "call failed");
uint256 sum = abi.decode(result, (uint256));
return sum;
}
}
contract Calc {
function add(uint256 x, uint256 y) public returns (uint256) {
return x + y;
}
}
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