poly-eip712-structs

from eip712_structs import make_domain, EIP712Struct, String, Uint import os # Define a domain separator for the EIP-712 message domain = make_domain(name='My Application', version='1.0.0', chainId=1) # Define your custom EIP-712 struct type class MyStruct(EIP712Struct): some_string = String() some_number = Uint(256) # Create an instance of your struct with data my_data = MyStruct(some_string='hello world', some_number=1234) # Convert to EIP-712 message dictionary message_dict = my_data.to_message(domain) print(f"EIP-712 Message Dict: {message_dict}") # Get the signable bytes hash (e.g., for use with a private key) signable_bytes = my_data.signable_bytes(domain) print(f"Signable Bytes Hash: {signable_bytes.hex()}") # Example of setting/getting values dictionary-style my_data['some_number'] = 4567 assert my_data['some_number'] == 4567