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28 lines
685 B
Python
28 lines
685 B
Python
import re
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from common.constants import LOCATOR_LEN_HEX
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def check_sha256_hex_format(value):
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"""
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Checks if a given value is a 32-byte hex encoded string.
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Args:
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value(:mod:`str`): the value to be checked.
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Returns:
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:mod:`bool`: Whether or not the value matches the format.
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"""
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return isinstance(value, str) and re.match(r"^[0-9A-Fa-f]{64}$", value) is not None
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def compute_locator(tx_id):
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"""
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Computes an appointment locator given a transaction id.
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Args:
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tx_id (:obj:`str`): the transaction id used to compute the locator.
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Returns:
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(:obj:`str`): The computed locator.
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"""
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return tx_id[:LOCATOR_LEN_HEX]
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