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Python implementation of the BIP32 key derivation scheme

Project description

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hdwallets

A basic implementation of the BIP32 specification for hierarchical deterministic wallets.

A fork of https://github.com/darosior/python-bip32 with some notable changes:

  • base58 dependency removed. All interfaces input and output raw bytes instead of base58 strings.
  • Replaced coincurve dependency with ecdsa
  • Distributes type information (PEP 561)

Usage

>>> import base58
>>> from hdwallets import BIP32, HARDENED_INDEX
>>> bip32 = BIP32.from_seed(bytes.fromhex("01"))
# Specify the derivation path as a list ...
>>> bip32.get_xpriv_from_path([1, HARDENED_INDEX, 9998])
b"\x04\x88\xad\xe4\x037\x01)\x0f\x00\x00'\x0e7\xf9\xe7)\x8dCJ\x8b\xfb\xc2j#\xeb\xc0++\xdf}I\x80\xdfr\xef6\xad0\xf7K\x0ceE\xea\x00\xb3D8\x0b\x0e\xf4-\x9a\xe6\x91\xe9\x82\xe8\xbf\x9a\x97\x15\xfe?\x17\xdc[\xf7\xc5\xfb?\xbezaz\\\xb9"
# ... Or in usual m/the/path/
>>> bip32.get_xpriv_from_path("m/1/0'/9998")
b"\x04\x88\xad\xe4\x037\x01)\x0f\x00\x00'\x0e7\xf9\xe7)\x8dCJ\x8b\xfb\xc2j#\xeb\xc0++\xdf}I\x80\xdfr\xef6\xad0\xf7K\x0ceE\xea\x00\xb3D8\x0b\x0e\xf4-\x9a\xe6\x91\xe9\x82\xe8\xbf\x9a\x97\x15\xfe?\x17\xdc[\xf7\xc5\xfb?\xbezaz\\\xb9"
>>> bip32.get_xpub_from_path([HARDENED_INDEX, 42])
b"\x04\x88\xb2\x1e\x02\x11\xd4\xbb(\x00\x00\x00*\xaf?\xc3\x1bb)\x1d\x9e$\x91\xda\xc2b\x8e\x1fm\x7f6\x8c(\x8e'2.\x99-\xf2\xa1\x83\xd7F\x18\x03bB\xb0\xe5\x0b\xb8$\x97\xf0\xf3\xe47\xea\xd6\xd4\xa0\xe3~-#\xbf\t\xf5\x19\xb7\xd1\x06b\xb0\xac\xc5\xd4"
# You can also use "h" or "H" to signal for hardened derivation
>>> bip32.get_xpub_from_path("m/0h/42")
b"\x04\x88\xb2\x1e\x02\x11\xd4\xbb(\x00\x00\x00*\xaf?\xc3\x1bb)\x1d\x9e$\x91\xda\xc2b\x8e\x1fm\x7f6\x8c(\x8e'2.\x99-\xf2\xa1\x83\xd7F\x18\x03bB\xb0\xe5\x0b\xb8$\x97\xf0\xf3\xe47\xea\xd6\xd4\xa0\xe3~-#\xbf\t\xf5\x19\xb7\xd1\x06b\xb0\xac\xc5\xd4"
# You can use pubkey-only derivation
>>> bip32 = BIP32.from_xpub(base58.b58decode_check("xpub6AKC3u8URPxDojLnFtNdEPFkNsXxHfgRhySvVfEJy9SVvQAn14XQjAoFY48mpjgutJNfA54GbYYRpR26tFEJHTHhfiiZZ2wdBBzydVp12yU"))
>>> bip32.get_xpub_from_path([42, 43])
b'\x04\x88\xb2\x1e\x04\xf4p\xd4>\x00\x00\x00+h\xcf\xc2\xd1\xbe\x0c\\-:\x9fpDy\\x\xd5E\xc1\x988\xb1\xe2X\xd1\xba\xb1\xeac\x96\xb04\x8f\x02\xaf?<\xbe>\x92\xcc\xc1fq~\xa9\xcd\xcb\x10\xd5\x15]K\xd6\x10+\xdb\xa8\xb4\xedo\xd2hc\xf9x'
>>> bip32.get_xpub_from_path("m/42/43")
b'\x04\x88\xb2\x1e\x04\xf4p\xd4>\x00\x00\x00+h\xcf\xc2\xd1\xbe\x0c\\-:\x9fpDy\\x\xd5E\xc1\x988\xb1\xe2X\xd1\xba\xb1\xeac\x96\xb04\x8f\x02\xaf?<\xbe>\x92\xcc\xc1fq~\xa9\xcd\xcb\x10\xd5\x15]K\xd6\x10+\xdb\xa8\xb4\xedo\xd2hc\xf9x'
>>> bip32.get_pubkey_from_path("m/1/1/1/1/1/1/1/1/1/1/1")
b'\x02\x0c\xac\n\xa8\x06\x96C\x8e\x9b\xcf\x83]\x0c\rCm\x06\x1c\xe9T\xealo\xa2\xdf\x195\xebZ\x9b\xb8\x9e'

Installation

pip install hdwallets

Interface

All public keys below are compressed.

All path below are a list of integers representing the index of the key at each depth.

BIP32

from_seed(seed)

staticmethod

Instantiate from a raw seed (as bytes). See bip-0032's master key generation.

from_xpriv(xpriv)

staticmethod

Instantiate with an encoded serialized extended private key (as str) as master.

from_xpub(xpub)

staticmethod

Instantiate with an encoded serialized extended public key (as str) as master.

You'll only be able to derive unhardened public keys.

get_extended_privkey_from_path(path)

Returns (chaincode (bytes), privkey (bytes)) of the private key pointed by the path.

get_privkey_from_path(path)

Returns privkey (bytes), the private key pointed by the path.

get_extended_pubkey_from_path(path)

Returns (chaincode (bytes), pubkey (bytes)) of the public key pointed by the path.

Note that you don't need to have provided the master private key if the path doesn't include an index >= HARDENED_INDEX.

get_pubkey_from_path(path)

Returns pubkey (bytes), the public key pointed by the path.

Note that you don't need to have provided the master private key if the path doesn't include an index >= HARDENED_INDEX.

get_xpriv_from_path(path)

Returns xpriv (str) the serialized and encoded extended private key pointed by the given path.

get_xpub_from_path(path)

Returns xpub (str) the serialized and encoded extended public key pointed by the given path.

Note that you don't need to have provided the master private key if the path doesn't include an index >= HARDENED_INDEX.

get_master_xpriv(path)

Equivalent to get_xpriv_from_path([]).

get_master_xpub(path)

Equivalent to get_xpub_from_path([]).

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