INNER CODE UNIT · Python

parse_derivation_path

polhenarejos/pico-hsm · tools/pico-hsm-tool.py:530

def parse_derivation_path(path):
    if path == "m":
        return []
    if len(path) < 3:
        raise ValueError(f"derivation path too short: {path}")
    elems = path.split("/")
    if elems[0] != 'm':
        raise ValueError(f"derivation path {path} does not begin with 'm/'")
    indices = []
    for e in elems[1:]:
        if len(e) == 0:
            raise ValueError(f"derivation path contains empty index: {path}")
        off = 0
        if e[-1:] in ["'", "h"]:
            off = 0x80000000
            e = e[:-1]
        indices.append(int(e) + off)
    return indices

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