Crypto Transaction Hash (Generic) Regex for Python

What this pattern does

This page provides a lightweight, single-purpose regular expression for matching crypto transaction hash (generic), ported and verified for Python. Financial data validation has zero tolerance for false negatives — a missed invalid entry can corrupt downstream calculations. The snippet below is ready to drop into your Python project — whether you're validating in a Django view, a FastAPI endpoint, or a standalone data processing script.

Python Implementation

# Crypto Transaction Hash (Generic)
# ReDoS-safe | RegexVault — Finance > Crypto

import re

crypto_transaction_hash_generic_pattern = re.compile(r'^(?:0x)?[0-9a-fA-F]{64}$')

def validate_crypto_transaction_hash_generic(value: str) -> bool:
    return bool(crypto_transaction_hash_generic_pattern.fullmatch(value))

# Example
print(validate_crypto_transaction_hash_generic("0xabcdef0123456789abcdef0123456789abcdef0123456789abcdef0123456789"))  # True

Test Cases

When to use this pattern

This pattern is drawn from the Finance > Crypto category and carries a ReDoS-safe certification. That matters for Python developers because particularly important in Python web servers where CPU-bound regex operations can stall concurrent request handling. RegexVault audits patterns against known backtracking attack vectors, ensuring you have the necessary context before using this regex in a high-stakes production environment.

Common Pitfalls

Technical Notes

Ethereum transactions use the 0x prefix. Bitcoin transactions do not. Both produce 256-bit (64 hex chars) hashes. Solana uses Base58-encoded 64-byte hashes — use a different pattern for Solana txids.