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#!/usr/bin/env python3
# Copyright (c) 2014-2022 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
"""Test RPCs that retrieve information from the mempool."""
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import (
assert_equal,
assert_raises_rpc_error,
)
from test_framework.wallet import MiniWallet
class RPCMempoolInfoTest(BitcoinTestFramework):
def set_test_params(self):
self.num_nodes = 1
def run_test(self):
self.wallet = MiniWallet(self.nodes[0])
self.wallet.rescan_utxos()
confirmed_utxo = self.wallet.get_utxo()
# Create a tree of unconfirmed transactions in the mempool:
# txA
# / \
# / \
# / \
# / \
# / \
# txB txC
# / \ / \
# / \ / \
# txD txE txF txG
# \ /
# \ /
# txH
def create_tx(**kwargs):
return self.wallet.send_self_transfer_multi(
from_node=self.nodes[0],
**kwargs,
)
txA = create_tx(utxos_to_spend=[confirmed_utxo], num_outputs=2)
txB = create_tx(utxos_to_spend=[txA["new_utxos"][0]], num_outputs=2)
txC = create_tx(utxos_to_spend=[txA["new_utxos"][1]], num_outputs=2)
txD = create_tx(utxos_to_spend=[txB["new_utxos"][0]], num_outputs=1)
txE = create_tx(utxos_to_spend=[txB["new_utxos"][1]], num_outputs=1)
txF = create_tx(utxos_to_spend=[txC["new_utxos"][0]], num_outputs=2)
txG = create_tx(utxos_to_spend=[txC["new_utxos"][1]], num_outputs=1)
txH = create_tx(utxos_to_spend=[txE["new_utxos"][0],txF["new_utxos"][0]], num_outputs=1)
txidA, txidB, txidC, txidD, txidE, txidF, txidG, txidH = [
tx["txid"] for tx in [txA, txB, txC, txD, txE, txF, txG, txH]
]
mempool = self.nodes[0].getrawmempool()
assert_equal(len(mempool), 8)
for txid in [txidA, txidB, txidC, txidD, txidE, txidF, txidG, txidH]:
assert_equal(txid in mempool, True)
self.log.info("Find transactions spending outputs")
result = self.nodes[0].gettxspendingprevout([ {'txid' : confirmed_utxo['txid'], 'vout' : 0}, {'txid' : txidA, 'vout' : 1} ])
assert_equal(result, [ {'txid' : confirmed_utxo['txid'], 'vout' : 0, 'spendingtxid' : txidA}, {'txid' : txidA, 'vout' : 1, 'spendingtxid' : txidC} ])
self.log.info("Find transaction spending multiple outputs")
result = self.nodes[0].gettxspendingprevout([ {'txid' : txidE, 'vout' : 0}, {'txid' : txidF, 'vout' : 0} ])
assert_equal(result, [ {'txid' : txidE, 'vout' : 0, 'spendingtxid' : txidH}, {'txid' : txidF, 'vout' : 0, 'spendingtxid' : txidH} ])
self.log.info("Find no transaction when output is unspent")
result = self.nodes[0].gettxspendingprevout([ {'txid' : txidH, 'vout' : 0} ])
assert_equal(result, [ {'txid' : txidH, 'vout' : 0} ])
result = self.nodes[0].gettxspendingprevout([ {'txid' : txidA, 'vout' : 5} ])
assert_equal(result, [ {'txid' : txidA, 'vout' : 5} ])
self.log.info("Mixed spent and unspent outputs")
result = self.nodes[0].gettxspendingprevout([ {'txid' : txidB, 'vout' : 0}, {'txid' : txidG, 'vout' : 3} ])
assert_equal(result, [ {'txid' : txidB, 'vout' : 0, 'spendingtxid' : txidD}, {'txid' : txidG, 'vout' : 3} ])
self.log.info("Unknown input fields")
assert_raises_rpc_error(-3, "Unexpected key unknown", self.nodes[0].gettxspendingprevout, [{'txid' : txidC, 'vout' : 1, 'unknown' : 42}])
self.log.info("Invalid vout provided")
assert_raises_rpc_error(-8, "Invalid parameter, vout cannot be negative", self.nodes[0].gettxspendingprevout, [{'txid' : txidA, 'vout' : -1}])
self.log.info("Invalid txid provided")
assert_raises_rpc_error(-3, "Expected type string for txid, got number", self.nodes[0].gettxspendingprevout, [{'txid' : 42, 'vout' : 0}])
self.log.info("Missing outputs")
assert_raises_rpc_error(-8, "Invalid parameter, outputs are missing", self.nodes[0].gettxspendingprevout, [])
self.log.info("Missing vout")
assert_raises_rpc_error(-3, "Missing vout", self.nodes[0].gettxspendingprevout, [{'txid' : txidA}])
self.log.info("Missing txid")
assert_raises_rpc_error(-3, "Missing txid", self.nodes[0].gettxspendingprevout, [{'vout' : 3}])
if __name__ == '__main__':
RPCMempoolInfoTest().main()
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