[tests] Add wallet_balance.py

Adds a test specifically to test the wallet's getbalance and
getunconfirmedbalance RPCs.

Github-Pull: #14845
Rebased-From: c1825b9d398b31967887c459c0fad9cf56cf95c6

3 files changed, 134 insertions, 13 deletions

diff --git a/test/functional/test_runner.py b/test/functional/test_runner.py
index 37b378e9ca..0befab6c64 100755
--- a/test/functional/test_runner.py
+++ b/test/functional/test_runner.py
@@ -124,6 +124,7 @@ BASE_SCRIPTS = [
     'wallet_importprunedfunds.py',
     'rpc_zmq.py',
     'rpc_signmessage.py',
+    'wallet_balance.py',
     'feature_nulldummy.py',
     'mempool_accept.py',
     'wallet_import_rescan.py',
diff --git a/test/functional/wallet_balance.py b/test/functional/wallet_balance.py
new file mode 100755
index 0000000000..05c97e0340
--- /dev/null
+++ b/test/functional/wallet_balance.py
@@ -0,0 +1,133 @@
+#!/usr/bin/env python3
+# Copyright (c) 2018 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 the wallet balance RPC methods."""
+from decimal import Decimal
+
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import (
+    assert_equal,
+    assert_raises_rpc_error,
+)
+
+RANDOM_COINBASE_ADDRESS = 'mneYUmWYsuk7kySiURxCi3AGxrAqZxLgPZ'
+
+def create_transactions(node, address, amt, fees):
+    # Create and sign raw transactions from node to address for amt.
+    # Creates a transaction for each fee and returns an array
+    # of the raw transactions.
+    utxos = node.listunspent(0)
+
+    # Create transactions
+    inputs = []
+    ins_total = 0
+    for utxo in utxos:
+        inputs.append({"txid": utxo["txid"], "vout": utxo["vout"]})
+        ins_total += utxo['amount']
+        if ins_total > amt:
+            break
+
+    txs = []
+    for fee in fees:
+        outputs = {address: amt, node.getrawchangeaddress(): ins_total - amt - fee}
+        raw_tx = node.createrawtransaction(inputs, outputs, 0, True)
+        raw_tx = node.signrawtransactionwithwallet(raw_tx)
+        txs.append(raw_tx)
+
+    return txs
+
+class WalletTest(BitcoinTestFramework):
+    def set_test_params(self):
+        self.num_nodes = 2
+        self.setup_clean_chain = True
+
+    def skip_test_if_missing_module(self):
+        self.skip_if_no_wallet()
+
+    def run_test(self):
+        # Check that nodes don't own any UTXOs
+        assert_equal(len(self.nodes[0].listunspent()), 0)
+        assert_equal(len(self.nodes[1].listunspent()), 0)
+
+        self.log.info("Mining one block for each node")
+
+        self.nodes[0].generate(1)
+        self.sync_all()
+        self.nodes[1].generate(1)
+        self.nodes[1].generatetoaddress(100, RANDOM_COINBASE_ADDRESS)
+        self.sync_all()
+
+        assert_equal(self.nodes[0].getbalance(), 50)
+        assert_equal(self.nodes[1].getbalance(), 50)
+
+        self.log.info("Test getbalance with different arguments")
+        assert_equal(self.nodes[0].getbalance("*"), 50)
+        assert_equal(self.nodes[0].getbalance("*", 1), 50)
+        assert_equal(self.nodes[0].getbalance("*", 1, True), 50)
+        assert_equal(self.nodes[0].getbalance(minconf=1), 50)
+
+        # Send 40 BTC from 0 to 1 and 60 BTC from 1 to 0.
+        txs = create_transactions(self.nodes[0], self.nodes[1].getnewaddress(), 40, [Decimal('0.01')])
+        self.nodes[0].sendrawtransaction(txs[0]['hex'])
+        self.nodes[1].sendrawtransaction(txs[0]['hex'])  # sending on both nodes is faster than waiting for propagation
+
+        self.sync_all()
+        txs = create_transactions(self.nodes[1], self.nodes[0].getnewaddress(), 60, [Decimal('0.01'), Decimal('0.02')])
+        self.nodes[1].sendrawtransaction(txs[0]['hex'])
+        self.nodes[0].sendrawtransaction(txs[0]['hex'])  # sending on both nodes is faster than waiting for propagation
+        self.sync_all()
+
+        # First argument of getbalance must be set to "*"
+        assert_raises_rpc_error(-32, "dummy first argument must be excluded or set to \"*\"", self.nodes[1].getbalance, "")
+
+        self.log.info("Test getbalance and getunconfirmedbalance with unconfirmed inputs")
+
+        # getbalance without any arguments includes unconfirmed transactions, but not untrusted transactions
+        assert_equal(self.nodes[0].getbalance(), Decimal('9.99'))  # change from node 0's send
+        assert_equal(self.nodes[1].getbalance(), Decimal('29.99'))  # change from node 1's send
+        # Same with minconf=0
+        assert_equal(self.nodes[0].getbalance(minconf=0), Decimal('9.99'))
+        assert_equal(self.nodes[1].getbalance(minconf=0), Decimal('29.99'))
+        # getbalance with a minconf incorrectly excludes coins that have been spent more recently than the minconf blocks ago
+        # TODO: fix getbalance tracking of coin spentness depth
+        assert_equal(self.nodes[0].getbalance(minconf=1), Decimal('0'))
+        assert_equal(self.nodes[1].getbalance(minconf=1), Decimal('0'))
+        # getunconfirmedbalance
+        assert_equal(self.nodes[0].getunconfirmedbalance(), Decimal('60'))  # output of node 1's spend
+        assert_equal(self.nodes[1].getunconfirmedbalance(), Decimal('0'))  # Doesn't include output of node 0's send since it was spent
+
+        # Node 1 bumps the transaction fee and resends
+        self.nodes[1].sendrawtransaction(txs[1]['hex'])
+        self.sync_all()
+
+        self.log.info("Test getbalance and getunconfirmedbalance with conflicted unconfirmed inputs")
+
+        assert_equal(self.nodes[0].getwalletinfo()["unconfirmed_balance"], Decimal('60'))  # output of node 1's send
+        assert_equal(self.nodes[0].getunconfirmedbalance(), Decimal('60'))
+        assert_equal(self.nodes[1].getwalletinfo()["unconfirmed_balance"], Decimal('0'))  # Doesn't include output of node 0's send since it was spent
+        assert_equal(self.nodes[1].getunconfirmedbalance(), Decimal('0'))
+
+        self.nodes[1].generatetoaddress(1, RANDOM_COINBASE_ADDRESS)
+        self.sync_all()
+
+        # balances are correct after the transactions are confirmed
+        assert_equal(self.nodes[0].getbalance(), Decimal('69.99'))  # node 1's send plus change from node 0's send
+        assert_equal(self.nodes[1].getbalance(), Decimal('29.98'))  # change from node 0's send
+
+        # Send total balance away from node 1
+        txs = create_transactions(self.nodes[1], self.nodes[0].getnewaddress(), Decimal('29.97'), [Decimal('0.01')])
+        self.nodes[1].sendrawtransaction(txs[0]['hex'])
+        self.nodes[1].generatetoaddress(2, RANDOM_COINBASE_ADDRESS)
+        self.sync_all()
+
+        # getbalance with a minconf incorrectly excludes coins that have been spent more recently than the minconf blocks ago
+        # TODO: fix getbalance tracking of coin spentness depth
+        # getbalance with minconf=3 should still show the old balance
+        assert_equal(self.nodes[1].getbalance(minconf=3), Decimal('0'))
+
+        # getbalance with minconf=2 will show the new balance.
+        assert_equal(self.nodes[1].getbalance(minconf=2), Decimal('0'))
+
+if __name__ == '__main__':
+    WalletTest().main()
diff --git a/test/functional/wallet_basic.py b/test/functional/wallet_basic.py
index 4079d05491..d8ab390afa 100755
--- a/test/functional/wallet_basic.py
+++ b/test/functional/wallet_basic.py
@@ -67,15 +67,6 @@ class WalletTest(BitcoinTestFramework):
         assert_equal(self.nodes[1].getbalance(), 50)
         assert_equal(self.nodes[2].getbalance(), 0)
 
-        # Check getbalance with different arguments
-        assert_equal(self.nodes[0].getbalance("*"), 50)
-        assert_equal(self.nodes[0].getbalance("*", 1), 50)
-        assert_equal(self.nodes[0].getbalance("*", 1, True), 50)
-        assert_equal(self.nodes[0].getbalance(minconf=1), 50)
-
-        # first argument of getbalance must be excluded or set to "*"
-        assert_raises_rpc_error(-32, "dummy first argument must be excluded or set to \"*\"", self.nodes[0].getbalance, "")
-
         # Check that only first and second nodes have UTXOs
         utxos = self.nodes[0].listunspent()
         assert_equal(len(utxos), 1)
@@ -242,10 +233,6 @@ class WalletTest(BitcoinTestFramework):
 
         assert(txid1 in self.nodes[3].getrawmempool())
 
-        # Exercise balance rpcs
-        assert_equal(self.nodes[0].getwalletinfo()["unconfirmed_balance"], 1)
-        assert_equal(self.nodes[0].getunconfirmedbalance(), 1)
-
         # check if we can list zero value tx as available coins
         # 1. create raw_tx
         # 2. hex-changed one output to 0.0