def serialize(self):
"""
Serialize raw block in bytes.
A block consists of a 80 bytes header:
* version - 4 bytes
* previous block - 32 bytes
* merkle root - 32 bytes
* timestamp - 4 bytes
* bits - 4 bytes
* nonce - 4 bytes
Followed by a list of raw serialized transactions.
Method will raise an error if one of the header fields is missing or has an incorrect size.
:return bytes:
"""
if len(self.transactions) != self.tx_count or len(
self.transactions) < 1:
raise ValueError(
"Block contains incorrect number of transactions, can not serialize"
)
rb = self.version[::-1]
rb += self.prev_block[::-1]
rb += self.merkle_root[::-1]
rb += struct.pack('>L', self.time)[::-1]
rb += self.bits[::-1]
rb += self.nonce[::-1]
if len(rb) != 80:
raise ValueError(
"Missing or incorrect length of 1 of the block header variables: version, prev_block, "
"merkle_root, time, bits or nonce.")
rb += int_to_varbyteint(len(self.transactions))
for t in self.transactions:
rb += t.raw()
return rb
def test_int_to_varbyteint_3(self):
self.assertEqual(b'\xff\xff\xff\xff\xff\xff\xff\xff\xff', int_to_varbyteint(18446744073709551615))
def test_int_to_varbyteint_1(self):
self.assertEqual(b'd', int_to_varbyteint(100))
def test_int_to_varbyteint_2(self):
self.assertEqual(b'\xfd\xfd\x00', int_to_varbyteint(253))
redeemscript = '5221023dd6aeaa2acb92cbea35820361e5fd07af10f4b01c985adec30848b424756a6c210381cd2bb2a38d939fa677a5dcc' \
'981ee0630b32b956b2e6dc3e1c028e6d09db5a72103d2c6d31cabe4025c25879010465f501194b352823c553660d303adfa' \
'9a26ad3c53ae'
print(to_hexstring(hash160(to_bytes(redeemscript))))
#
# Other type conversions and normalizations
#
der_signature = '3045022100f952ff1b290c54d8b9fd35573b50f1af235632c595bb2f10b34127fb82f66d18022068b59150f825a81032c' \
'22ce2db091d6fd47294c9e2144fa0291949402e3003ce'
print("\n=== Convert DER encoded signature ===")
print(convert_der_sig(to_bytes(der_signature)))
print("\n=== Varbyte Int conversions ===")
print("Number 1000 as Varbyte Integer (hexstring): %s" % to_hexstring(int_to_varbyteint(1000)))
print("Converted back (3 is size in bytes: 1 size byte + integer in bytes): ", varbyteint_to_int(to_bytes('fde803')))
# Normalize data
print("\n=== Normalizations ===")
data = [
u"guion cruz envío papel otoño percha hazaña salir joya gorra íntimo actriz",
u'\u2167',
u'\uFDFA',
"あじわう ちしき たわむれる おくさま しゃそう うんこう ひてい みほん たいほ てのひら りこう わかれる かいすいよく こもん ねもと",
'12345',
]
for dt in data:
print("\nInput data", dt)
print("Normalized unicode string (normalize_string): ", normalize_string(dt))