Intro

This repository allows you to create Solidity functions that accept specified parameters and generate the corresponding selector.

The function selector is the first 4 bytes of the keccak256 hash of the function signature, and it is used to identify functions.

Features

• Custom function selector creation.
• Change the minimum and maximum length of the function name.
• Includes checks against the reserved keywords, supported characters, and parameter types.

Getting started

git clone https://github.com/urosognjenovic/solidity-function-selector-creator

cd function-selector-creator

For MacOS:

python3 main.py

For Windows:

python main.py

or

py main.py

Input the target function selector (without the 0x prefix) in the terminal.

Input the function parameter types.

Customization

Important

The parsimounious library may cause problems with newer versions of Python. To avoid these issues, install an older version of Python and run the script in a virtual environment.

min_function_name_length and max_function_name_length can be used to tune the function output.

For testing purposes, one can changes the value of target_selector_length. Also, if this value is not passed to the create_custom_function_selector function, the function will use the default value (8 characters).

Future upgrades

• Estimate number of guesses and required time
• Add option for user to make the function start with/end with/contain a certain string