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45 lines
1.3 KiB
Python
45 lines
1.3 KiB
Python
# utils/fingerprint.py
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"""
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Fingerprint Module
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This module provides functionality to generate a unique, one-way hashed fingerprint
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from a given seed phrase. The fingerprint serves as an identifier for each seed,
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facilitating organized and secure storage.
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"""
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import hashlib
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import logging
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from typing import Optional
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# Instantiate the logger
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logger = logging.getLogger(__name__)
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def generate_fingerprint(seed_phrase: str, length: int = 16) -> Optional[str]:
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"""
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Generates a unique fingerprint from the provided seed phrase using SHA-256.
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Parameters:
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seed_phrase (str): The BIP-39 seed phrase.
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length (int): The desired length of the fingerprint.
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Returns:
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Optional[str]: The generated fingerprint or None if an error occurs.
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"""
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try:
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# Normalize the seed phrase
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normalized_seed = seed_phrase.strip().lower()
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# Compute SHA-256 hash
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sha256_hash = hashlib.sha256(normalized_seed.encode("utf-8")).hexdigest()
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# Truncate to desired length
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fingerprint = sha256_hash[:length].upper()
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logger.debug("Generated seed fingerprint successfully.")
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return fingerprint
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except Exception as e:
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logger.error(f"Failed to generate fingerprint: {e}", exc_info=True)
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return None
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