def hash_160_bytes_to_address(h160, addrtype=PUBKEY_ADDRESS):
if addrtype == PUBKEY_ADDRESS:
prefix = chr(ADDRESS_PREFIXES[lbryschema.BLOCKCHAIN_NAME][PUBKEY_ADDRESS])
elif addrtype == SCRIPT_ADDRESS:
prefix = chr(ADDRESS_PREFIXES[lbryschema.BLOCKCHAIN_NAME][SCRIPT_ADDRESS])
else:
raise Exception("Invalid address prefix")
return b58encode(prefix + h160 + double_sha256(prefix + h160)[0:4])
def test_verify_proof(self):
claim1_name = 97 # 'a'
claim1_txid = 'bd9fa7ffd57d810d4ce14de76beea29d847b8ac34e8e536802534ecb1ca43b68'
claim1_outpoint = 0
claim1_height = 10
claim1_node_hash = get_hash_for_outpoint(
unhexlify(claim1_txid)[::-1], claim1_outpoint, claim1_height)
claim2_name = 98 # 'b'
claim2_txid = 'ad9fa7ffd57d810d4ce14de76beea29d847b8ac34e8e536802534ecb1ca43b68'
claim2_outpoint = 1
claim2_height = 5
claim2_node_hash = get_hash_for_outpoint(
unhexlify(claim2_txid)[::-1], claim2_outpoint, claim2_height)
to_hash1 = claim1_node_hash
hash1 = double_sha256(to_hash1)
to_hash2 = bytes((claim1_name, )) + hash1 + bytes(
(claim2_name, )) + claim2_node_hash
root_hash = double_sha256(to_hash2)
proof = {
'last takeover height':
claim1_height,
'txhash':
claim1_txid,
'nOut':
claim1_outpoint,
'nodes': [
{
'children': [{
'character': 97
}, {
'character': 98,
'nodeHash': hexlify(claim2_node_hash[::-1])
}]
},
{
'children': []
},
]
}
out = verify_proof(proof, hexlify(root_hash[::-1]), 'a')
self.assertEqual(out, True)
def validate_b58_checksum(addr_bytes):
addr_without_checksum = addr_bytes[:-ADDRESS_CHECKSUM_LENGTH]
addr_checksum = addr_bytes[-ADDRESS_CHECKSUM_LENGTH:]
if double_sha256(
addr_without_checksum)[:ADDRESS_CHECKSUM_LENGTH] != addr_checksum:
raise InvalidAddress("Invalid address checksum")
def b58encode_with_checksum(addr_bytes):
addr_checksum = double_sha256(addr_bytes)[:ADDRESS_CHECKSUM_LENGTH]
return b58encode(addr_bytes + addr_checksum)