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46 lines
1.4 KiB
Python
46 lines
1.4 KiB
Python
import base64
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import hashlib
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from typing import Dict, List
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from cashu.core.secp import PrivateKey, PublicKey
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from cashu.core.settings import MAX_ORDER
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# entropy = bytes([random.getrandbits(8) for i in range(16)])
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# mnemonic = bip39.mnemonic_from_bytes(entropy)
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# seed = bip39.mnemonic_to_seed(mnemonic)
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# root = bip32.HDKey.from_seed(seed, version=NETWORKS["main"]["xprv"])
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# bip44_xprv = root.derive("m/44h/1h/0h")
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# bip44_xpub = bip44_xprv.to_public()
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def derive_keys(master_key: str, derivation_path: str = ""):
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"""
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Deterministic derivation of keys for 2^n values.
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TODO: Implement BIP32.
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"""
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return {
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2
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** i: PrivateKey(
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hashlib.sha256((str(master_key) + derivation_path + str(i)).encode("utf-8"))
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.hexdigest()
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.encode("utf-8")[:32],
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raw=True,
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)
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for i in range(MAX_ORDER)
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}
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def derive_pubkeys(keys: Dict[int, PrivateKey]):
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return {amt: keys[amt].pubkey for amt in [2**i for i in range(MAX_ORDER)]}
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def derive_keyset_id(keys: Dict[int, PublicKey]):
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"""Deterministic derivation keyset_id from set of public keys."""
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# sort public keys by amount
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sorted_keys = dict(sorted(keys.items()))
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pubkeys_concat = "".join([p.serialize().hex() for _, p in sorted_keys.items()])
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return base64.b64encode(
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hashlib.sha256((pubkeys_concat).encode("utf-8")).digest()
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).decode()[:12]
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