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Parse a Web3 exception and return a human-readable error message.
​
error
Exception
required
Exception from Web3 transaction or call
​
returns
str
required
Human-readable error message
def parse_contract_error(error: Exception) -> str:
    error_data = None
    if hasattr(error, 'data'):
        error_data = error.data
    elif hasattr(error, 'args') and len(error.args) > 0:
        if isinstance(error.args[0], dict) and 'data' in error.args[0]:
            error_data = error.args[0]['data']
    if error_data is None:
        error_str = str(error)
        if '0x' in error_str:
            import re
            hex_match = re.search('0x[a-fA-F0-9]+', error_str)
            if hex_match:
                error_data = hex_match.group(0)
    if error_data:
        signature = extract_error_signature(error_data)
        if signature and signature in CONTRACT_ERROR_MESSAGES:
            return CONTRACT_ERROR_MESSAGES[signature]
    return str(error)