def frombtcbytes(inp: bytes) -> bytes:
# Handle genesis block hashes, e.g. from Lightning messages
bitcoin_mainnet_rev_genesis = bfh(bitcoin.rev_hex("000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f"))
if bitcoin_mainnet_rev_genesis in inp:
return inp.replace(bitcoin_mainnet_rev_genesis, BitcoinMainnet.rev_genesis_bytes())
bitcoin_testnet_rev_genesis = bfh(bitcoin.rev_hex("000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943"))
if bitcoin_testnet_rev_genesis in inp:
return inp.replace(bitcoin_testnet_rev_genesis, BitcoinTestnet.rev_genesis_bytes())
raise AssertionError(f"Invalid input for format conversion: {inp}")
def test_scrypt(self):
#0200000011f1fe21e0b66dc214be46366465cb95d29830e31ddd225a11349a836a993bf7b5db36b3e5593d039779bff204d132b65ee029a2e499ebeb5a4b19cbe862eee2b623cc5276676c1c000e1c60
header = {
'block_height': 12095,
'nonce': 1612451328,
'timestamp': 1389110198,
'version': 2,
'prev_block_hash':
'f73b996a839a34115a22dd1de33098d295cb65643646be14c26db6e021fef111',
'merkle_root':
'e2ee62e8cb194b5aebeb99e4a229e05eb632d104f2bf7997033d59e5b336dbb5',
'bits': 476866422
}
powhash = rev_hex(bh2u(scryptGetHash(bfh(serialize_header(header)))))
self.assertEqual(
powhash,
'00000000335c88172421df73a1c1f22f4d7c23d8ef34c78d728c4eff3ba24a34')
def frombtc(inp: str) -> str:
"""Given a Bitcoin address or key, converts it to Namecoin format"""
# If there is a trailing suffix on an URI with an address, remove it
# and add it back after conversion.
qm = inp.find("?")
if qm != -1:
suffix = inp[qm:]
stripped = inp[:qm]
return frombtc(stripped) + suffix
# If there is a prefix separated by colon, strip it off and add it
# back later. For bitcoin: URI's, the prefix is rebranded as well.
colon = inp.find(":")
if colon != -1:
prefix = inp[:colon]
stripped = inp[colon + 1:]
if prefix == "bitcoin":
prefix = "xaya"
return prefix + ":" + frombtc(stripped)
# Handle bech32 segwit data first.
if inp[:3].lower() == "bc1":
return convert_bech32(inp, BitcoinMainnet.SEGWIT_HRP)
if inp[:3].lower() in ["tb1", "tn1"]:
return convert_bech32(inp, BitcoinTestnet.SEGWIT_HRP)
# Handle bech32 lightning addresses.
if inp[:4].lower() == "lnbc":
return convert_ln_bech32(inp, BitcoinMainnet.SEGWIT_HRP)
# Handle genesis block hashes, e.g. from Lightning messages
bitcoin_mainnet_rev_genesis = bitcoin.rev_hex(
"000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f")
if bitcoin_mainnet_rev_genesis in inp:
return inp.replace(bitcoin_mainnet_rev_genesis,
bitcoin.rev_hex(BitcoinMainnet.GENESIS))
bitcoin_testnet_rev_genesis = bitcoin.rev_hex(
"000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943")
if bitcoin_testnet_rev_genesis in inp:
return inp.replace(bitcoin_testnet_rev_genesis,
bitcoin.rev_hex(BitcoinTestnet.GENESIS))
# Otherwise, try to base58-decode it and then look at the version to
# determine what it could have been.
try:
vch = bitcoin.DecodeBase58Check(inp)
old_version = vch[0]
if vch[0] == 0: # P2PKH address
new_version = BitcoinMainnet.ADDRTYPE_P2PKH
elif vch[0] == 111:
new_version = BitcoinTestnet.ADDRTYPE_P2PKH
elif vch[0] == 5: # P2SH address
new_version = BitcoinMainnet.ADDRTYPE_P2SH
elif vch[0] == 196:
new_version = BitcoinTestnet.ADDRTYPE_P2SH
elif vch[0] in range(128, 136): # Privkey with optional script type
offset = vch[0] - 128
new_version = BitcoinMainnet.WIF_PREFIX + offset
elif vch[0] == 239:
new_version = BitcoinTestnet.WIF_PREFIX
else:
raise AssertionError(
f"Unknown Bitcoin base58 version: {old_version}")
new_vch = bytes([new_version]) + vch[1:]
outp = bitcoin.EncodeBase58Check(new_vch)
return outp
except bitcoin.InvalidChecksum:
# This is not base58 data, maybe try something else.
pass
raise AssertionError(f"Invalid input for format conversion: {inp}")
def rev_genesis_bytes(cls) -> bytes:
return bytes.fromhex(bitcoin.rev_hex(cls.GENESIS))