feat(`cast`): add ability to specify `--solc-version` for manually defining version to compile with

[maxweisspoker]

Component

Cast

Have you ensured that all of these are up to date?

• Foundry
• Foundryup

What version of Foundry are you on?

cast Version: 1.0.0-nightly Commit SHA: c609884 Build Timestamp: 2025-02-23T00:22:54.429897389Z (1740270174) Build Profile: maxperf

What version of Foundryup are you on?

N/A manual download of nightly

What command(s) is the bug in?

cast storage

Operating System

Linux

Describe the bug

When attempting to analyze the ByBit hack, I ran the following command to check its storage prior to the hack:

$ cast storage 0x1Db92e2EeBC8E0c075a02BeA49a2935BcD2dFCF4 --block 218952370

This produces the following error:

Contract at 0x1Db92e2EeBC8E0c075a02BeA49a2935BcD2dFCF4 is a proxy, trying to fetch source at 0x34CfAC646f301356fAa8B21e94227e3583Fe3F5F...
Error: Compiler run failed:
Error (2314): Expected '(' but got ','
Contract.sol:136:40: ParserError: Expected '(' but got ','
            let success := call(sub(gas, 10000), token, 0, add(data, 0x20), mload(data), 0, 0)
                                       ^

I believe that error is occuring because the Gnosis Safe Mastercopy contract was written in Solidity version 0.5, but cast is attempting to parse the assembly with a newer version, and the Yul for the gas variable is slightly different. I don't actually know Yul so I might be incorrect, but that's my guess based on the error.

I also have not tried specifying an older compiler version, so this may in fact not be a "bug" if specifying a 0.5 compiler is the correct solution.

[zerosnacks]

Hi @maxweisspoker, thanks for flagging

This appears to stem from the Gnosis Safe contract specifying compatibility with pragma solidity >=0.5.0 <0.7.0; whereas it is not compatible with version 0.6.*.

When cloned locally I can confirm it compiles correctly with 0.5.0 but setting FOUNDRY_SOLC_VERSION=0.5.0 does not seem to have an effect nor is there a way to conveniently pass in the --solc-version as a CLI argument.

The EVM version is selected correctly when the solc version is set.

I'll change this ticket to be a feature.

[startup-dreamer]

As I am already working on cast related issue would like to take this one also.

[maxweisspoker]

Fantastic, thanks so much both of you for the lightning speed response and investigation!