adding inputs to constructor using evm run offline

[yohanelly95]

I want deploy this contract via evm offline using bytecode and get the response:

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

contract BoolContract {
    constructor(bool _value) {
        assembly {
            let ptr := mload(0x40) // Load the current free memory pointer
            mstore(ptr, _value) // Store `true` (1) at the pointer
            mstore(0x40, add(ptr, 32)) // Update the free memory pointer
            return(ptr, 32) // Return the data
        }
    }
}

I get get the abi and byte code via

solc --bin contracts/BoolContract.sol  --abi contracts/BoolContract.sol -o output --evm-version london --overwrite 

and run

evm --code $(cat output/BoolContract.bin) run --input 0000000000000000000000000000000000000000000000000000000000000001 

but I always get the error that error:

execution reverted

how do I get the expected output which would be the same as the input?

[s1na]

I've been wondering about this since you opened the issue. And I have figured out the issue. Solidity expects constructor arguments to be appended to the code itself and not provided as calldata input. So what you need to do is:

❯ ./build/bin/evm run --code "6080604052348015600e575f80fd5b50604051609938038060998339818101604052810190602c91906072565b60405181815260208101604052602081f35b5f80fd5b5f8115159050919050565b6054816042565b8114605d575f80fd5b50565b5f81519050606c81604d565b92915050565b5f602082840312156084576083603e565b5b5f608f848285016060565b9150509291505056fe0000000000000000000000000000000000000000000000000000000000000001"
0x0000000000000000000000000000000000000000000000000000000000000001

Which as you can see does return the input value.

The reason is simple. In Ethereum, when you deploy a contract, the compile code will be set in the calldata of that transaction. Because the nodes have to learn about the code. And because there is only one calldata, Solidity decided for the approach of taking in arguments for constructor from the end of the code.