def update_merkle_root_to_match_coinbase(auxpow_header):
coinbase = auxpow_header['parent_coinbase_tx']
revised_coinbase_txid = auxpow.fast_txid(coinbase)
revised_merkle_branch = [revised_coinbase_txid]
revised_merkle_root = auxpow.calculate_merkle_root(
revised_coinbase_txid, revised_merkle_branch,
auxpow_header['coinbase_merkle_index'])
auxpow_header['parent_header']['merkle_root'] = revised_merkle_root
auxpow_header['coinbase_merkle_branch'] = revised_merkle_branch
def test_deserialize_auxpow_header_explicit_coinbase(self):
header = self.deserialize_with_auxpow(header_with_mm)
header_auxpow = header['powdata']['auxpow']
coinbase_tx = header_auxpow['parent_coinbase_tx']
expected_coinbase_txid = 'e751249a0dfc33c119c2f3375054a8cfe18eacf8291da689cb8f4570afbdb1a3'
observed_coinbase_txid = auxpow.fast_txid(coinbase_tx)
self.assertEqual(expected_coinbase_txid, observed_coinbase_txid)
self.assertEqual(header_auxpow['coinbase_merkle_branch'], [
"5c3158d4f108917fba77f9695650608477456b8f6f06238b1613311aafa74b09",
"eebaf1b6b9ab455497e6dd571140f0a3647ce36e1ab3e34a177dacc474a755d9",
"b57660b84bf4011d416c6a884c329b092ad0fb0dabce075ed2a830ca14f86cb9",
"2f8974fd4f4a648613dbed7544bbfcbbeceaa4c143aaed7812c14cbdb5cd3954",
"26fe65cbf0e306f589fe74179b0d8e58ec664971ff8d3d10702803bb0f0a2cbf",
"f280de3cf6d62a9b88713435a0319763df2886128a65ddb1af5d9b3ea01d4c07",
"52a27c19db70842beba5d65be16d7eb04a9562762859bfb192f9fe65ac5bc8fa",
"48ee3a89e348e962228292d9169a650323d0dc16b8c5e3ab84b98d94a2f8a466",
"e2d47a5fa5522849202c0d2caa2906c13f8c44e1878420e4d8e8e892ea96097a",
"a644bcb70473e2670f047d34da5cb3b6b886949cefee927706c4bf512e1ea73e",
"676ac4c906bb6a5da87b20e0d6baf3b3bac55299556ec9e81e81e67bbd719b91",
"04b4353b08ffd77e01d57285cbb2f538950d0039995889c685bcdd9c9c181870",
])
coinbase_merkle_index = header_auxpow['coinbase_merkle_index']
self.assertEqual(0, coinbase_merkle_index)
self.assertEqual(header_auxpow['chain_merkle_branch'], [
"2cadbb3ce34769fc6f95572012c22605f8c3a69982a9a6854523f6548007d30b",
"e5c2407ba454ffeb28cf0c50c5c293a84c9a75788f8a8f35ccb974e606280377",
"a5cd51355bea0fd77416d06bf3647e16b4663d2f87e6a3ccb23e713cb8b4de1c",
])
chain_merkle_index = header_auxpow['chain_merkle_index']
self.assertEqual(7, chain_merkle_index)
expected_parent_header = blockchain.deserialize_pure_header(
bfh('0000ff3f913d01444f14db2c6ab43ffd0f36af5613423815543c22000000000000000000ef6330ff500ba8a2eb0d2e988d3275057fcf81beb55e430e5cdf4a20dee82ad76c83785ba70d2c1728f397b0'
), None)
expected_parent_hash = blockchain.hash_header(expected_parent_header)
observed_parent_hash = blockchain.hash_header(
header_auxpow['parent_header'])
self.assertEqual(expected_parent_hash, observed_parent_hash)
expected_parent_merkle_root = expected_parent_header['merkle_root']
observed_parent_merkle_root = header_auxpow['parent_header'][
'merkle_root']
self.assertEqual(expected_parent_merkle_root,
observed_parent_merkle_root)
def test_deserialize_auxpow_header_explicit_coinbase(self):
header = self.deserialize_with_auxpow(namecoin_header_37174)
header_auxpow = header['auxpow']
self.assertEqual(constants.net.AUXPOW_CHAIN_ID,
header_auxpow['chain_id'])
coinbase_tx = header_auxpow['parent_coinbase_tx']
expected_coinbase_txid = '8a3164be45a621f85318647d425fe9f45837b8e42ec4fdd902d7f64daf61ff4a'
observed_coinbase_txid = auxpow.fast_txid(coinbase_tx)
self.assertEqual(expected_coinbase_txid, observed_coinbase_txid)
self.assertEqual(header_auxpow['coinbase_merkle_branch'], [
"f8f27314022a5165ae122642babb28dd44191dd36f99dad80b4f16b75197dde0",
"c8a9dc420e17dee7b04bc0174c7a37ed9e5bc3f0ea0fdfe0b5d24bfc19ecedb0",
"0ce9c5b98e212527e4aa7b9298435dc4e8f4dfc4dc63b7c89c06300637c33620",
"3b6d0c4122a5b047cb879a440461839f0446f6bd451f01c6f0b14b6624e84136",
"458500be38a68b215112df5e52d9c08fdd52034fb2005ce15d2a42be28e436cb",
])
coinbase_merkle_index = header_auxpow['coinbase_merkle_index']
self.assertEqual(0, coinbase_merkle_index)
self.assertEqual(header_auxpow['chain_merkle_branch'], [
"000000000000000000000000000000000000000000000000000000000000000a",
"65bd8eb2c7e3a3646507977e8659e5396b197f197fbb51e7158927a263798302",
"5f961bb13289d705abb28376a01f7097535c95f87b9e719b9ec39d8eb20d72e9",
"7cb5fdcc41120d6135a40a6753bddc0c9b675ba2936d2e0cd78cdcb02e6beb50",
])
chain_merkle_index = header_auxpow['chain_merkle_index']
self.assertEqual(11, chain_merkle_index)
expected_parent_header = blockchain.deserialize_pure_header(
bfh('0100000055a7bc918827dbe7d8027781d803f4b418589b7b9fc03e718a03000000000000625a3d6dc4dfb0ab25f450cd202ff3bdb074f2edde1ddb4af5217e10c9dbafb9639a0a4fd7690d1a25aeaa97'
), None)
expected_parent_hash = blockchain.hash_header(expected_parent_header)
observed_parent_hash = blockchain.hash_header(
header_auxpow['parent_header'])
self.assertEqual(expected_parent_hash, observed_parent_hash)
expected_parent_merkle_root = expected_parent_header['merkle_root']
observed_parent_merkle_root = header_auxpow['parent_header'][
'merkle_root']
self.assertEqual(expected_parent_merkle_root,
observed_parent_merkle_root)
def update_merkle_root_to_match_coinbase(auxpow_header):
"""Updates the parent block merkle root
This modifies the merkle root in the auxpow's parent block header to
match the auxpow coinbase transaction. We need this after modifying
the coinbase for tests.
Note that this also breaks the PoW. This is fine for tests that
fail due to an earlier check already."""
coinbase = auxpow_header['parent_coinbase_tx']
revised_coinbase_txid = auxpow.fast_txid(coinbase)
revised_merkle_branch = [revised_coinbase_txid]
revised_merkle_root = hash_merkle_root(revised_merkle_branch, revised_coinbase_txid, auxpow_header['coinbase_merkle_index'])
auxpow_header['parent_header']['merkle_root'] = revised_merkle_root
auxpow_header['coinbase_merkle_branch'] = revised_merkle_branch
def test_deserialize_auxpow_header_explicit_coinbase(self):
header_bytes = bfh(namecoin_header_37174)
# We can't pass the real height because it's below a checkpoint, and
# the deserializer expects ElectrumX to strip checkpointed AuxPoW.
header = blockchain.deserialize_header(
header_bytes,
constants.net.max_checkpoint() + 1)
header_auxpow = header['auxpow']
self.assertEqual(auxpow.CHAIN_ID, header_auxpow['chain_id'])
coinbase_tx = header_auxpow['parent_coinbase_tx']
expected_coinbase_txid = '8a3164be45a621f85318647d425fe9f45837b8e42ec4fdd902d7f64daf61ff4a'
observed_coinbase_txid = auxpow.fast_txid(coinbase_tx)
self.assertEqual(expected_coinbase_txid, observed_coinbase_txid)
coinbase_merkle_branch = header_auxpow['coinbase_merkle_branch']
self.assertEqual(5, len(coinbase_merkle_branch))
self.assertEqual(
'f8f27314022a5165ae122642babb28dd44191dd36f99dad80b4f16b75197dde0',
coinbase_merkle_branch[0])
self.assertEqual(
'c8a9dc420e17dee7b04bc0174c7a37ed9e5bc3f0ea0fdfe0b5d24bfc19ecedb0',
coinbase_merkle_branch[1])
self.assertEqual(
'0ce9c5b98e212527e4aa7b9298435dc4e8f4dfc4dc63b7c89c06300637c33620',
coinbase_merkle_branch[2])
self.assertEqual(
'3b6d0c4122a5b047cb879a440461839f0446f6bd451f01c6f0b14b6624e84136',
coinbase_merkle_branch[3])
self.assertEqual(
'458500be38a68b215112df5e52d9c08fdd52034fb2005ce15d2a42be28e436cb',
coinbase_merkle_branch[4])
coinbase_merkle_index = header_auxpow['coinbase_merkle_index']
self.assertEqual(0, coinbase_merkle_index)
chain_merkle_branch = header_auxpow['chain_merkle_branch']
self.assertEqual(4, len(chain_merkle_branch))
self.assertEqual(
'000000000000000000000000000000000000000000000000000000000000000a',
chain_merkle_branch[0])
self.assertEqual(
'65bd8eb2c7e3a3646507977e8659e5396b197f197fbb51e7158927a263798302',
chain_merkle_branch[1])
self.assertEqual(
'5f961bb13289d705abb28376a01f7097535c95f87b9e719b9ec39d8eb20d72e9',
chain_merkle_branch[2])
self.assertEqual(
'7cb5fdcc41120d6135a40a6753bddc0c9b675ba2936d2e0cd78cdcb02e6beb50',
chain_merkle_branch[3])
chain_merkle_index = header_auxpow['chain_merkle_index']
self.assertEqual(11, chain_merkle_index)
expected_parent_hash = '00000000000024111173f561b36ad4906df95f52503a79332d7f540c2a57db84'
observed_parent_hash = blockchain.hash_header(
header_auxpow['parent_header'])
self.assertEqual(expected_parent_hash, observed_parent_hash)
expected_parent_header = blockchain.deserialize_header(
bfh('0100000055a7bc918827dbe7d8027781d803f4b418589b7b9fc03e718a03000000000000625a3d6dc4dfb0ab25f450cd202ff3bdb074f2edde1ddb4af5217e10c9dbafb9639a0a4fd7690d1a25aeaa97'
), 1)
expected_parent_merkle_root = expected_parent_header['merkle_root']
observed_parent_merkle_root = header_auxpow['parent_header'][
'merkle_root']
self.assertEqual(expected_parent_merkle_root,
observed_parent_merkle_root)