def random_tx(hash160s, utxos):
'''Create a random TX paying to some of the hash160s using some of the
UTXOS. Return the TX. UTXOs is updated for the effects of the TX.
'''
inputs = []
n_inputs = min(randrange(1, 4), len(utxos))
input_value = 0
# Create inputs spending random UTXOs. total the inpu
for n in range(n_inputs):
prevout = choice(list(utxos))
hashX, value = utxos.pop(prevout)
inputs.append(TxInput(prevout[0], prevout[1], b'', 4294967295))
input_value += value
# Add a generation/coinbase like input that is present in some coins
inputs.append(TxInput(bytes(32), 4294967295, b'', 4294967295))
fee = min(input_value, randrange(500))
input_value -= fee
outputs = []
n_outputs = randrange(1, 4)
for n in range(n_outputs):
value = randrange(input_value + 1)
input_value -= value
pk_script = coin.hash160_to_P2PKH_script(choice(hash160s))
outputs.append(TxOutput(value, pk_script))
tx = Tx(2, inputs, outputs, 0)
tx_bytes = tx.serialize()
tx_hash = tx_hash_fn(tx_bytes)
for n, output in enumerate(tx.outputs):
utxos[(tx_hash, n)] = (coin.hashX_from_script(output.pk_script),
output.value)
return tx, tx_hash, tx_bytes
def test_claim_update_validator(block_processor):
claim_id = claim_id_hash(b'claimtx', 42)
prev_hash, prev_idx = b'previous_claim_txid', 42
input = TxInput(prev_hash, prev_idx, b'script', 1)
claim = ClaimUpdate(b'name', claim_id, b'new value')
assert not block_processor.get_update_input(claim, [input])
block_processor.put_claim_info(
claim_id,
ClaimInfo(b'name', b'value', prev_hash, prev_idx, 20, b'address', 1,
None))
assert block_processor.get_update_input(claim, [input])
