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refactor(core/cardano): Clean up variable_length_encode().

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Andrew Kozlik 2021-03-22 21:15:23 +01:00 committed by Andrew Kozlik
parent 97ca1e3341
commit 2964f2e855
1 changed files with 4 additions and 9 deletions
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13
core/src/apps/cardano/helpers/utils.py
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@ -18,17 +18,12 @@ def variable_length_encode(number: int) -> bytes:
if number < 0: if number < 0:
raise ValueError("Negative numbers not supported. Number supplied: %s" % number) raise ValueError("Negative numbers not supported. Number supplied: %s" % number)
encoded = [] encoded = [number & 0x7F]
while number > 0x7F:
bit_length = len(bin(number)[2:])
encoded.append(number & 127)
while bit_length > 7:
number >>= 7 number >>= 7
bit_length -= 7 encoded.append((number & 0x7F) + 0x80)
encoded.insert(0, (number & 127) + 128)
return bytes(encoded) return bytes(reversed(encoded))
def to_account_path(path: list[int]) -> list[int]: def to_account_path(path: list[int]) -> list[int]: