Crypto Standard Library
In this example, the verify_signature function is an exported function in a Xian smart contract. It takes a verification key vk, a message msg, and a signature signature. It uses the verify function from the crypto module to check if the signature is valid for the given message and verification key. The result (True or False) is then returned. This can be used to ensure data integrity and authenticity in transactions within the smart contract environment.
This module uses the PyNaCl library under the hood, employing the Ed25519 signature scheme.
Usage
python
@export
def verify_signature(vk: str, msg: str, signature: str):
# Use the verify function to check if the signature is valid for the given message and verification key
is_valid = crypto.verify(vk, msg, signature)
# Return the result of the verification
return is_valid