Toy example to see how `abi.encode` works with zero values

AbiEncode.sol

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.19;

contract Contract {
    function foo(bytes32 seed) external view returns (bytes memory) {
        return abi.encode(tx.origin, seed);
    }

    function getBytes32(uint256 number) external pure returns (bytes32) {
        return bytes32(number);
    }
}