def redeem_script_to_address(txin_type, redeem_script):
if txin_type == 'p2sh':
return hash160_to_p2sh(hash_160(bfh(redeem_script)))
elif txin_type == 'p2wsh':
return script_to_p2wsh(redeem_script)
elif txin_type == 'p2wsh-p2sh':
scriptSig = p2wsh_nested_script(redeem_script)
return hash160_to_p2sh(hash_160(bfh(scriptSig)))
else:
raise NotImplementedError(txin_type)
def pubkey_to_address(txin_type, pubkey):
if txin_type == 'p2pkh':
return public_key_to_p2pkh(bfh(pubkey))
elif txin_type == 'p2wpkh':
return public_key_to_p2wpkh(bfh(pubkey))
elif txin_type == 'p2wpkh-p2sh':
scriptSig = p2wpkh_nested_script(pubkey)
return hash160_to_p2sh(hash_160(bfh(scriptSig)))
else:
raise NotImplementedError(txin_type)
def bip32_public_derivation(xpub, branch, sequence):
xtype, depth, fingerprint, child_number, c, cK = deserialize_xpub(xpub)
if not sequence.startswith(branch):
raise ValueError('incompatible branch ({}) and sequence ({})'.format(
branch, sequence))
sequence = sequence[len(branch):]
for n in sequence.split('/'):
if n == '': continue
i = int(n)
parent_cK = cK
cK, c = CKD_pub(cK, c, i)
depth += 1
fingerprint = hash_160(parent_cK)[0:4]
child_number = bfh("%08X" % i)
return serialize_xpub(xtype, c, cK, depth, fingerprint, child_number)
def bip32_private_derivation(xprv, branch, sequence):
if not sequence.startswith(branch):
raise ValueError('incompatible branch ({}) and sequence ({})'.format(
branch, sequence))
if branch == sequence:
return xprv, xpub_from_xprv(xprv)
xtype, depth, fingerprint, child_number, c, k = deserialize_xprv(xprv)
sequence = sequence[len(branch):]
for n in sequence.split('/'):
if n == '': continue
i = int(n[:-1]) + BIP32_PRIME if n[-1] == "'" else int(n)
parent_k = k
k, c = CKD_priv(k, c, i)
depth += 1
parent_cK = ecc.ECPrivkey(parent_k).get_public_key_bytes(compressed=True)
fingerprint = hash_160(parent_cK)[0:4]
child_number = bfh("%08X" % i)
cK = ecc.ECPrivkey(k).get_public_key_bytes(compressed=True)
xpub = serialize_xpub(xtype, c, cK, depth, fingerprint, child_number)
xprv = serialize_xprv(xtype, c, k, depth, fingerprint, child_number)
return xprv, xpub
def p2wpkh_nested_script(pubkey):
pkh = bh2u(hash_160(bfh(pubkey)))
return '00' + push_script(pkh)
def public_key_to_p2wpkh(public_key):
return hash_to_segwit_addr(hash_160(public_key), witver=0)
def public_key_to_p2pkh(public_key: bytes) -> str:
return hash160_to_p2pkh(hash_160(public_key))
def redeem_script_to_address(txin_type, redeem_script):
if txin_type == 'p2sh':
return hash160_to_p2sh(hash_160(bfh(redeem_script)))
else:
raise NotImplementedError(txin_type)