def pool_solver(rng):
print(f"calculating range {rng}")
for nonce in rng:
b = Block(
version=0,
prev_block_hash=
'000000273d64c0b32fa8475004513d1e5f8335a718dc9bd6c99f60d5cf6f7175',
merkle_tree_hash=
'5b9f0cb4023a18cd1de03c0035283965aa6b14ec72a5d9ce7b2a029a9afce47a',
timestamp=1501827000,
bits=24,
nonce=nonce,
txns=[
Transaction(
txins=[
TxIn(outpoint=None,
signature=SignatureScript(unlock_sig=b'4',
unlock_pk=None),
sequence=0)
],
txouts=[
TxOut(value=5000000000,
pubkey='1Piq91dFUqSb7tdddCWvuGX5UgdzXeoAwA')
],
locktime=None)
])
if int(b.id, 16) <= (1 << (256 - b.bits)):
return nonce, b.id
return None
def test_serialization():
outpoint1 = OutPoint(txid='coffee', txout_idx=0)
outpoint2 = OutPoint(txid='coffee', txout_idx=0)
txin1 = TxIn(outpoint=outpoint1,
signature=SignatureScript(unlock_sig=b'sign',
unlock_pk=b'bar'),
sequence=1)
txin2 = TxIn(outpoint=outpoint2,
signature=SignatureScript(unlock_sig=b'sign',
unlock_pk=b'bar'),
sequence=2)
txout = TxOut(value=101, pubkey='abcnddfjrwof123')
txn1 = Transaction(txins=[txin1], txouts=[txout], locktime=0)
txn2 = Transaction(txins=[txin2], txouts=[txout], locktime=0)
block = Block(1, 'deadbeef', 'coffee', int(time.time()), 100, 100,
[txn1, txn2])
utxo = UnspentTxOut(*txout,
txid=txn1.id,
txout_idx=0,
is_coinbase=False,
height=0)
utxo_set = [utxo.outpoint, utxo]
for obj in (outpoint1, outpoint2, txin1, txin2, txout, txn1, txn2, block,
utxo, utxo_set):
assert deserialize(serialize(obj)) == obj
def test_build_spend_message():
txout = TxOut(value=101, pubkey='1zz8w9')
txin = TxIn(outpoint=OutPoint('c0ffee', 0),
signature=SignatureScript(unlock_sig=b'oursig',
unlock_pk=b'foo'),
sequence=1)
txn = Transaction(txins=[txin], txouts=[txout], locktime=0)
spend_msg = build_spend_message(txin.outpoint, txin.signature.unlock_pk,
txin.sequence, txn.txouts)
assert spend_msg == b'2c162f2c05a771e52c01fda220073aa0665cc873193235bdb90359631720e7a5'
# adding a new output to the txn creates a new spend message.
txn.txouts.append(TxOut(value=1, pubkey='1zz'))
assert build_spend_message(txin.outpoint, txin.signature.unlock_pk,
txin.sequence, txn.txouts) != spend_msg
def test_dependent_txns_in_single_block(): set_active_chain([]) mempool.clear() assert connect_block(chain1[0]) == ACTIVE_CHAIN_IDX assert connect_block(chain1[1]) == ACTIVE_CHAIN_IDX assert len(get_active_chain()) == 2 assert len(utxo_set) == 2 utxo1 = utxo_set[list(utxo_set.keys())[0]] txout1 = TxOut(value=901, pubkey=utxo1.pubkey) txin1 = make_txin(signing_key, utxo1.outpoint, txout1) txn1 = Transaction(txins=[txin1], txouts=[txout1], locktime=0) # Create a transaction that is depend on the yet-unconfirmed transaction above txout2 = TxOut(value=9001, pubkey=txout1.pubkey) txin2 = make_txin(signing_key, OutPoint(txn1.id, 0), txout2) txn2 = Transaction(txins=[txin2], txouts=[txout2], locktime=0) # assert that we don't accept this txn -- too early to spend the coinbase with pytest.raises(TxnValidationError) as excinfo: validate_txn(txn2) assert 'Spend value is more than available' in str(excinfo) connect_block(chain1[2]) add_txn_to_mempool(txn1) assert txn1.id in mempool # In txn2, we're attemping to spend more than is available (9001 vs. 901). assert not add_txn_to_mempool(txn2) with pytest.raises(TxnValidationError) as excinfo: validate_txn(txn2) assert 'Spend value is more than available' in str(excinfo.value) # Recreate the transaction with an acceptable value txout2 = TxOut(value=901, pubkey=txout1.pubkey) txin2 = make_txin(signing_key, OutPoint(txn1.id, 0), txout2) txn2 = Transaction(txins=[txin2], txouts=[txout2], locktime=0) add_txn_to_mempool(txn2) assert txn2.id in mempool
def send_value(args):
"""
Send value to some address.
"""
val, to_addr, sk = int(args['<val>']), args['<addr>'], args['signing_key']
selected = set()
my_utxos = set(
sorted(find_utxos_for_address(args), key=lambda i:
(i.value, i.height)))
for utxo in my_utxos:
selected.add(utxo)
if sum(i.value for i in selected) > val:
break
txout = TxOut(value=val, pubkey=to_addr)
txn = Transaction(
txins=[make_txin(sk, coin.outpoint, txout) for coin in selected],
txouts=[txout])
logger.info(f'built txn {txn}')
logger.info(f'broadcast txn {txn.id}')
send_msg(txn)
prev_block_hash=None,
merkle_tree_hash=
'548b61957ff5fb0cb3d2c511f1a6e28460f0d7175eaa3058bfac986d37a72004',
timestamp=1501821412,
bits=24,
nonce=2275359062,
txns=[
Transaction(txins=[
TxIn(outpoint=None,
signature=SignatureScript(unlock_sig=b'0',
unlock_pk=None),
sequence=0)
],
txouts=[
TxOut(
value=5000000000,
pubkey='143UVyz7ooiAv1pMqbwPPpnH4BV9ifJGFF')
],
locktime=None)
]),
# Block id:
# 000000d432bd0ec0a087a0d30a6e5c251116919bf91e195f1f9c3d4f3e3f0ba3
Block(version=0,
prev_block_hash=
'0000009284177ad434618ded91f9f81fad78e0c26f77cffb5d9a406a8d4dab80',
merkle_tree_hash=
'509dd8d49774ddf72c24f83faa5a2e851da514103f53e6bec3df4ad5f83d8421',
timestamp=1501826444,
bits=24,
nonce=5244659,
'688787d8ff144c502c7f5cffaafe2cc588d86079f9de88304c26b0cb99ce91c6',
'timestamp':
1504563279,
'bits':
24,
'nonce':
86038336,
'txns': [
Transaction(txins=[
TxIn(outpoint=None,
signature=SignatureScript(unlock_sig=b'0',
unlock_pk=None),
sequence=0)
],
txouts=[
TxOut(value=5000000,
pubkey='143UVyz7ooiAv1pMqbwPPpnH4BV9ifJGFF')
])
]
})
# highest proof of work
active_chain: Iterable[Block] = [genesis_block]
# side branches
side_branches: Iterable[Iterable[Block]] = []
orphan_blocks: Iterable[Block] = []
ACTIVE_CHAIN_IDX = 0
# Synchronize access to the active chain and side branches