Herodotus Data Processor Documentation

Debugging Guide

Effective debugging is key to rapidly identifying and resolving issues while writing your custom Cairo module.

Printing Debug Messages

To help with debugging, you can use the println! macro to print debug messages to the console.

To disable the validation pass while developing and using that macro, you can add the following to your Scarb.toml:

[[target.starknet-contract]]
allowed-libfuncs-deny = true

#[starknet::contract]
mod contract {
    use hdp_cairo::{HDP};

    #[storage]
    struct Storage {}

    #[external(v0)]
    pub fn main(
        ref self: ContractState,
        hdp: HDP
    ) {
        println!("Hello, world!");
    }
}

Apply these practices to streamline your debugging workflow and quickly trace bugs.

Happy debugging!