56 lines
2.1 KiB
Python
56 lines
2.1 KiB
Python
from fixtures import *
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from test_framework.serializations import PSBT
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from test_framework.utils import wait_for
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def test_spend_change(lianad, bitcoind):
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"""We can spend a coin that was received on a change address."""
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# Receive a coin on a receive address
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addr = lianad.rpc.getnewaddress()["address"]
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txid = bitcoind.rpc.sendtoaddress(addr, 0.01)
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bitcoind.generate_block(1, wait_for_mempool=txid)
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wait_for(lambda: len(lianad.rpc.listcoins()["coins"]) == 1)
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# Create a transaction that will spend this coin to 1) one of our receive
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# addresses 2) an external address 3) one of our change addresses.
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outpoints = [c["outpoint"] for c in lianad.rpc.listcoins()["coins"]]
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destinations = {
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bitcoind.rpc.getnewaddress(): 100_000,
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lianad.rpc.getnewaddress()["address"]: 100_000,
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}
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res = lianad.rpc.createspend(destinations, outpoints, 2)
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assert "psbt" in res
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# The transaction must contain a change output.
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spend_psbt = PSBT.from_base64(res["psbt"])
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assert len(spend_psbt.o) == 3
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assert len(spend_psbt.tx.vout) == 3
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# Sign and broadcast this first Spend transaction.
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signed_psbt = lianad.sign_psbt(spend_psbt)
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lianad.rpc.updatespend(signed_psbt.to_base64())
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spend_txid = signed_psbt.tx.txid().hex()
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lianad.rpc.broadcastspend(spend_txid)
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bitcoind.generate_block(1, wait_for_mempool=spend_txid)
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wait_for(lambda: len(lianad.rpc.listcoins()["coins"]) == 3)
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# Now create a new transaction that spends the change output as well as
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# the output sent to the receive address.
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outpoints = [
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c["outpoint"]
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for c in lianad.rpc.listcoins()["coins"]
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if c["spend_info"] is None
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]
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destinations = {
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bitcoind.rpc.getnewaddress(): 100_000,
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}
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res = lianad.rpc.createspend(destinations, outpoints, 2)
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spend_psbt = PSBT.from_base64(res["psbt"])
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# We can sign and broadcast it.
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signed_psbt = lianad.sign_psbt(spend_psbt)
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lianad.rpc.updatespend(signed_psbt.to_base64())
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spend_txid = signed_psbt.tx.txid().hex()
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lianad.rpc.broadcastspend(spend_txid)
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bitcoind.generate_block(1, wait_for_mempool=spend_txid)
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