def rebuild_template(self):
"""Rebuild a version 2 blockheader and serialize it.
oldest satoshi client coinbase script contains:
nBits, bnExtraNonce (nBits = GetNextWorkRequired(pindexPrev);)
later timestamp was used instead of "bits" to ensure coinbase txn is unique even if address is the same (github:83f4cd156e9d52bd7c4351336dfa4806a43ee4e4=.
now in version 2 blocks the height is included instead of the timestamp.
"""
coinbase_script = Script(
[push_bignum_instruction(self.block_height)] +
[push_bignum_instruction(self.extra_nonce)] +
[push_data_instruction(flag) for flag in self.coinbase_flags])
coinbase_txin = TxIn(Outpoint.null(),
coinbase_script,
sequence=TxIn.NSEQUENCE_FINAL)
coinbase_tx = Tx(version=1,
in_list=[coinbase_txin],
out_list=self.coinbase_txout_list,
locktime=0)
self.block_transactions = [coinbase_tx] + self.transactions
self.blockheader = BlockHeader(version=2,
hash_prev=self.hash_prev,
hash_merkle=compute_merkle_root(
self.block_transactions),
time=self.time,
bits=self.bits,
nonce=self.nonce)
self.serialized = self.serializer.serialize(self.blockheader)
def rebuild_template(self):
"""Rebuild a version 2 blockheader and serialize it.
oldest satoshi client coinbase script contains:
nBits, bnExtraNonce (nBits = GetNextWorkRequired(pindexPrev);)
later timestamp was used instead of "bits" to ensure coinbase txn is unique even if address is the same (github:83f4cd156e9d52bd7c4351336dfa4806a43ee4e4=.
now in version 2 blocks the height is included instead of the timestamp.
"""
coinbase_script = Script([push_bignum_instruction(self.block_height)] +
[push_bignum_instruction(self.extra_nonce)] +
[push_data_instruction(flag) for flag in self.coinbase_flags])
coinbase_txin = TxIn(Outpoint.null(),
coinbase_script,
sequence=TxIn.NSEQUENCE_FINAL)
coinbase_tx = Tx(version=1,
in_list=[coinbase_txin],
out_list=self.coinbase_txout_list,
locktime=0)
self.block_transactions = [coinbase_tx] + self.transactions
self.blockheader = BlockHeader(version=2,
hash_prev=self.hash_prev,
hash_merkle=compute_merkle_root(self.block_transactions),
time=self.time,
bits=self.bits,
nonce=self.nonce)
self.serialized = self.serializer.serialize(self.blockheader)
def test_block_deserialize(self):
blk, _ = BlockSerializer().deserialize(decodehexstr("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"))
blockheader = BlockHeader(version=1,
hash_prev=Uint256.from_hexstr("000000000fec081581146e8b16b275bfa52150ac4174a246cdf62694671ea7a3"),
hash_merkle=Uint256.from_hexstr("0d9da162550fc45b1aaa00e933b23b3cbc7f37a9b2d2070d61235eaec11a926a"),
time=1301129903,
bits=470809215,
nonce=1280448751)
tx1 = Tx(version=1,
in_list=[TxIn(previous_output=Outpoint.null(),
script=Script([Instruction(4, decodehexstr("7ffa0f1c")),
Instruction(1, decodehexstr("4e"))]),
sequence=TxIn.NSEQUENCE_FINAL )],
out_list=[TxOut(value=5002000000,
script=Script([Instruction(65, decodehexstr("049cc3cae30927c40598032044b9e9e25f4739b0d7ade62803f5e9cf075debc817e6d29f42c70d0a1beb1c904eaaa50ef885b011f9fbaa16ef288a7ad193e11567")),
Instruction(OP_CHECKSIG)]))],
locktime=0)
tx2 = Tx(version=1,
in_list=[TxIn(previous_output=Outpoint(hash=Uint256.from_hexstr("17c5cb687ba453ab65e12cdc0d8721c70ab4678665eb200c50cb9f1e3207090e"), index=0),
script=Script([Instruction(72, decodehexstr("3045022100ab2dc8932ca1d26f4cdac1feae09020a60ccc4d17b14e5fc5b21f3ab8c3a9cee022040a7208c172d19a19902280d66201c7fe2c3d8b2df7e23cc4e5b70fd52ecba2c01")),
Instruction(65, decodehexstr("04b77dd1f3a21cb3d067a7e76982a609d7310f8692f5d61346f3225323c425604a0c12862755335c49e392673106adfc5dfdee1e4d367f10353e8911fac687db3e"))]),
sequence=TxIn.NSEQUENCE_FINAL )],
out_list=[TxOut(value=24990000000,
script=Script([Instruction(OP_DUP),
Instruction(OP_HASH160),
Instruction(20, decodehexstr("4d8b17fbce571614be89df4bd872de892a479844")),
Instruction(OP_EQUALVERIFY),
Instruction(OP_CHECKSIG)])),
TxOut(value=5000000000,
script=Script([Instruction(OP_DUP),
Instruction(OP_HASH160),
Instruction(20, decodehexstr("fadad27c40adbe230f5e3c04d44a292975084831")),
Instruction(OP_EQUALVERIFY),
Instruction(OP_CHECKSIG)]))],
locktime=0)
self.assertEquals(blk, Block(blockheader, [tx1, tx2]))
def test_block_serialize(self):
blockheader = BlockHeader(
version=1,
hash_prev=Uint256.from_hexstr(
"000000000fec081581146e8b16b275bfa52150ac4174a246cdf62694671ea7a3"
),
hash_merkle=Uint256.from_hexstr(
"0d9da162550fc45b1aaa00e933b23b3cbc7f37a9b2d2070d61235eaec11a926a"
),
time=1301129903,
bits=470809215,
nonce=1280448751)
tx1 = Tx(
version=1,
in_list=[
TxIn(previous_output=Outpoint.null(),
script=Script([
Instruction(4, decodehexstr("7ffa0f1c")),
Instruction(1, decodehexstr("4e"))
]),
sequence=TxIn.NSEQUENCE_FINAL)
],
out_list=[
TxOut(
value=5002000000,
script=Script([
Instruction(
65,
decodehexstr(
"049cc3cae30927c40598032044b9e9e25f4739b0d7ade62803f5e9cf075debc817e6d29f42c70d0a1beb1c904eaaa50ef885b011f9fbaa16ef288a7ad193e11567"
)),
Instruction(OP_CHECKSIG)
]))
],
locktime=0)
tx2 = Tx(
version=1,
in_list=[
TxIn(previous_output=Outpoint(hash=Uint256.from_hexstr(
"17c5cb687ba453ab65e12cdc0d8721c70ab4678665eb200c50cb9f1e3207090e"
),
index=0),
script=Script([
Instruction(
72,
decodehexstr(
"3045022100ab2dc8932ca1d26f4cdac1feae09020a60ccc4d17b14e5fc5b21f3ab8c3a9cee022040a7208c172d19a19902280d66201c7fe2c3d8b2df7e23cc4e5b70fd52ecba2c01"
)),
Instruction(
65,
decodehexstr(
"04b77dd1f3a21cb3d067a7e76982a609d7310f8692f5d61346f3225323c425604a0c12862755335c49e392673106adfc5dfdee1e4d367f10353e8911fac687db3e"
))
]),
sequence=TxIn.NSEQUENCE_FINAL)
],
out_list=[
TxOut(value=24990000000,
script=Script([
Instruction(OP_DUP),
Instruction(OP_HASH160),
Instruction(
20,
decodehexstr(
"4d8b17fbce571614be89df4bd872de892a479844")),
Instruction(OP_EQUALVERIFY),
Instruction(OP_CHECKSIG)
])),
TxOut(value=5000000000,
script=Script([
Instruction(OP_DUP),
Instruction(OP_HASH160),
Instruction(
20,
decodehexstr(
"fadad27c40adbe230f5e3c04d44a292975084831")),
Instruction(OP_EQUALVERIFY),
Instruction(OP_CHECKSIG)
]))
],
locktime=0)
blk = Block(blockheader, [tx1, tx2])
data = BlockSerializer().serialize(blk)
self.assertEquals(
data,
decodehexstr(
"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"
))
