text: #!/usr/bin/env python3
  # Copyright (c) 2014-2020 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."""
  from decimal import Decimal
  from itertools import product
  
  from test_framework.blocktools import COINBASE_MATURITY
  from test_framework.test_framework import UmkoinTestFramework
  from test_framework.util import (
      assert_array_result,
      assert_equal,
      assert_fee_amount,
      assert_raises_rpc_error,
      find_vout_for_address,
  )
  from test_framework.wallet_util import test_address
  
  NOT_A_NUMBER_OR_STRING = "Amount is not a number or string"
  OUT_OF_RANGE = "Amount out of range"
  
  
  class WalletTest(UmkoinTestFramework):
      def set_test_params(self):
          self.num_nodes = 4
          self.extra_args = [[
              "-acceptnonstdtxn=1",
          ]] * self.num_nodes
          self.setup_clean_chain = True
          self.supports_cli = False
  
      def skip_test_if_missing_module(self):
          self.skip_if_no_wallet()
  
      def setup_network(self):
          self.setup_nodes()
          # Only need nodes 0-2 running at start of test
          self.stop_node(3)
          self.connect_nodes(0, 1)
          self.connect_nodes(1, 2)
          self.connect_nodes(0, 2)
          self.sync_all(self.nodes[0:3])
  
      def check_fee_amount(self, curr_balance, balance_with_fee, fee_per_byte, tx_size):
          """Return curr_balance after asserting the fee was in range"""
          fee = balance_with_fee - curr_balance
          assert_fee_amount(fee, tx_size, fee_per_byte * 1000)
          return curr_balance
  
      def get_vsize(self, txn):
          return self.nodes[0].decoderawtransaction(txn)['vsize']
  
      def run_test(self):
  
          # Check that there's no UTXO on none of the nodes
          assert_equal(len(self.nodes[0].listunspent()), 0)
          assert_equal(len(self.nodes[1].listunspent()), 0)
          assert_equal(len(self.nodes[2].listunspent()), 0)
  
          self.log.info("Mining blocks...")
  
          self.generate(self.nodes[0], 1)
  
          walletinfo = self.nodes[0].getwalletinfo()
          assert_equal(walletinfo['immature_balance'], 50)
          assert_equal(walletinfo['balance'], 0)
  
          self.sync_all(self.nodes[0:3])
          self.generate(self.nodes[1], COINBASE_MATURITY + 1)
          self.sync_all(self.nodes[0:3])
  
          assert_equal(self.nodes[0].getbalance(), 50)
          assert_equal(self.nodes[1].getbalance(), 50)
          assert_equal(self.nodes[2].getbalance(), 0)
  
          # Check that only first and second nodes have UTXOs
          utxos = self.nodes[0].listunspent()
          assert_equal(len(utxos), 1)
          assert_equal(len(self.nodes[1].listunspent()), 1)
          assert_equal(len(self.nodes[2].listunspent()), 0)
  
          self.log.info("Test gettxout")
          confirmed_txid, confirmed_index = utxos[0]["txid"], utxos[0]["vout"]
          # First, outputs that are unspent both in the chain and in the
          # mempool should appear with or without include_mempool
          txout = self.nodes[0].gettxout(txid=confirmed_txid, n=confirmed_index, include_mempool=False)
          assert_equal(txout['value'], 50)
          txout = self.nodes[0].gettxout(txid=confirmed_txid, n=confirmed_index, include_mempool=True)
          assert_equal(txout['value'], 50)
  
          # Send 21 UMK from 0 to 2 using sendtoaddress call.
          self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), 11)
          mempool_txid = self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), 10)
  
          self.log.info("Test gettxout (second part)")
          # utxo spent in mempool should be visible if you exclude mempool
          # but invisible if you include mempool
          txout = self.nodes[0].gettxout(confirmed_txid, confirmed_index, False)
          assert_equal(txout['value'], 50)
          txout = self.nodes[0].gettxout(confirmed_txid, confirmed_index)  # by default include_mempool=True
          assert txout is None
          txout = self.nodes[0].gettxout(confirmed_txid, confirmed_index, True)
          assert txout is None
          # new utxo from mempool should be invisible if you exclude mempool
          # but visible if you include mempool
          txout = self.nodes[0].gettxout(mempool_txid, 0, False)
          assert txout is None
          txout1 = self.nodes[0].gettxout(mempool_txid, 0, True)
          txout2 = self.nodes[0].gettxout(mempool_txid, 1, True)
          # note the mempool tx will have randomly assigned indices
          # but 10 will go to node2 and the rest will go to node0
          balance = self.nodes[0].getbalance()
          assert_equal(set([txout1['value'], txout2['value']]), set([10, balance]))
          walletinfo = self.nodes[0].getwalletinfo()
          assert_equal(walletinfo['immature_balance'], 0)
  
          # Have node0 mine a block, thus it will collect its own fee.
          self.generate(self.nodes[0], 1)
          self.sync_all(self.nodes[0:3])
  
          # Exercise locking of unspent outputs
          unspent_0 = self.nodes[2].listunspent()[0]
          unspent_0 = {"txid": unspent_0["txid"], "vout": unspent_0["vout"]}
          # Trying to unlock an output which isn't locked should error
          assert_raises_rpc_error(-8, "Invalid parameter, expected locked output", self.nodes[2].lockunspent, True, [unspent_0])
  
          # Locking an already-locked output should error
          self.nodes[2].lockunspent(False, [unspent_0])
          assert_raises_rpc_error(-8, "Invalid parameter, output already locked", self.nodes[2].lockunspent, False, [unspent_0])
  
          # Restarting the node should clear the lock
          self.restart_node(2)
          self.nodes[2].lockunspent(False, [unspent_0])
  
          # Unloading and reloating the wallet should clear the lock
          assert_equal(self.nodes[0].listwallets(), [self.default_wallet_name])
          self.nodes[2].unloadwallet(self.default_wallet_name)
          self.nodes[2].loadwallet(self.default_wallet_name)
          assert_equal(len(self.nodes[2].listlockunspent()), 0)
  
          # Locking non-persistently, then re-locking persistently, is allowed
          self.nodes[2].lockunspent(False, [unspent_0])
          self.nodes[2].lockunspent(False, [unspent_0], True)
  
          # Restarting the node with the lock written to the wallet should keep the lock
          self.restart_node(2)
          assert_raises_rpc_error(-8, "Invalid parameter, output already locked", self.nodes[2].lockunspent, False, [unspent_0])
  
          # Unloading and reloading the wallet with a persistent lock should keep the lock
          self.nodes[2].unloadwallet(self.default_wallet_name)
          self.nodes[2].loadwallet(self.default_wallet_name)
          assert_raises_rpc_error(-8, "Invalid parameter, output already locked", self.nodes[2].lockunspent, False, [unspent_0])
  
          # Locked outputs should not be used, even if they are the only available funds
          assert_raises_rpc_error(-6, "Insufficient funds", self.nodes[2].sendtoaddress, self.nodes[2].getnewaddress(), 20)
          assert_equal([unspent_0], self.nodes[2].listlockunspent())
  
          # Unlocking should remove the persistent lock
          self.nodes[2].lockunspent(True, [unspent_0])
          self.restart_node(2)
          assert_equal(len(self.nodes[2].listlockunspent()), 0)
  
          # Reconnect node 2 after restarts
          self.connect_nodes(1, 2)
          self.connect_nodes(0, 2)
  
          assert_raises_rpc_error(-8, "txid must be of length 64 (not 34, for '0000000000000000000000000000000000')",
                                  self.nodes[2].lockunspent, False,
                                  [{"txid": "0000000000000000000000000000000000", "vout": 0}])
          assert_raises_rpc_error(-8, "txid must be hexadecimal string (not 'ZZZ0000000000000000000000000000000000000000000000000000000000000')",
                                  self.nodes[2].lockunspent, False,
                                  [{"txid": "ZZZ0000000000000000000000000000000000000000000000000000000000000", "vout": 0}])
          assert_raises_rpc_error(-8, "Invalid parameter, unknown transaction",
                                  self.nodes[2].lockunspent, False,
                                  [{"txid": "0000000000000000000000000000000000000000000000000000000000000000", "vout": 0}])
          assert_raises_rpc_error(-8, "Invalid parameter, vout index out of bounds",
                                  self.nodes[2].lockunspent, False,
                                  [{"txid": unspent_0["txid"], "vout": 999}])
  
          # The lock on a manually selected output is ignored
          unspent_0 = self.nodes[1].listunspent()[0]
          self.nodes[1].lockunspent(False, [unspent_0])
          tx = self.nodes[1].createrawtransaction([unspent_0], { self.nodes[1].getnewaddress() : 1 })
          self.nodes[1].fundrawtransaction(tx,{"lockUnspents": True})
  
          # fundrawtransaction can lock an input
          self.nodes[1].lockunspent(True, [unspent_0])
          assert_equal(len(self.nodes[1].listlockunspent()), 0)
          tx = self.nodes[1].fundrawtransaction(tx,{"lockUnspents": True})['hex']
          assert_equal(len(self.nodes[1].listlockunspent()), 1)
  
          # Send transaction
          tx = self.nodes[1].signrawtransactionwithwallet(tx)["hex"]
          self.nodes[1].sendrawtransaction(tx)
          assert_equal(len(self.nodes[1].listlockunspent()), 0)
  
          # Have node1 generate 100 blocks (so node0 can recover the fee)
          self.generate(self.nodes[1], COINBASE_MATURITY)
          self.sync_all(self.nodes[0:3])
  
          # node0 should end up with 100 umk in block rewards plus fees, but
          # minus the 21 plus fees sent to node2
          assert_equal(self.nodes[0].getbalance(), 100 - 21)
          assert_equal(self.nodes[2].getbalance(), 21)
  
          # Node0 should have two unspent outputs.
          # Create a couple of transactions to send them to node2, submit them through
          # node1, and make sure both node0 and node2 pick them up properly:
          node0utxos = self.nodes[0].listunspent(1)
          assert_equal(len(node0utxos), 2)
  
          # create both transactions
          txns_to_send = []
          for utxo in node0utxos:
              inputs = []
              outputs = {}
              inputs.append({"txid": utxo["txid"], "vout": utxo["vout"]})
              outputs[self.nodes[2].getnewaddress()] = utxo["amount"] - 3
              raw_tx = self.nodes[0].createrawtransaction(inputs, outputs)
              txns_to_send.append(self.nodes[0].signrawtransactionwithwallet(raw_tx))
  
          # Have node 1 (miner) send the transactions
          self.nodes[1].sendrawtransaction(hexstring=txns_to_send[0]["hex"], maxfeerate=0)
          self.nodes[1].sendrawtransaction(hexstring=txns_to_send[1]["hex"], maxfeerate=0)
  
          # Have node1 mine a block to confirm transactions:
          self.generate(self.nodes[1], 1)
          self.sync_all(self.nodes[0:3])
  
          assert_equal(self.nodes[0].getbalance(), 0)
          assert_equal(self.nodes[2].getbalance(), 94)
  
          # Verify that a spent output cannot be locked anymore
          spent_0 = {"txid": node0utxos[0]["txid"], "vout": node0utxos[0]["vout"]}
          assert_raises_rpc_error(-8, "Invalid parameter, expected unspent output", self.nodes[0].lockunspent, False, [spent_0])
  
          # Send 10 UMK normal
          address = self.nodes[0].getnewaddress("test")
          fee_per_byte = Decimal('0.001') / 1000
          self.nodes[2].settxfee(fee_per_byte * 1000)
          txid = self.nodes[2].sendtoaddress(address, 10, "", "", False)
          self.generate(self.nodes[2], 1)
          self.sync_all(self.nodes[0:3])
          node_2_bal = self.check_fee_amount(self.nodes[2].getbalance(), Decimal('84'), fee_per_byte, self.get_vsize(self.nodes[2].gettransaction(txid)['hex']))
          assert_equal(self.nodes[0].getbalance(), Decimal('10'))
  
          # Send 10 UMK with subtract fee from amount
          txid = self.nodes[2].sendtoaddress(address, 10, "", "", True)
          self.generate(self.nodes[2], 1)
          self.sync_all(self.nodes[0:3])
          node_2_bal -= Decimal('10')
          assert_equal(self.nodes[2].getbalance(), node_2_bal)
          node_0_bal = self.check_fee_amount(self.nodes[0].getbalance(), Decimal('20'), fee_per_byte, self.get_vsize(self.nodes[2].gettransaction(txid)['hex']))
  
          self.log.info("Test sendmany")
  
          # Sendmany 10 UMK
          txid = self.nodes[2].sendmany('', {address: 10}, 0, "", [])
          self.generate(self.nodes[2], 1)
          self.sync_all(self.nodes[0:3])
          node_0_bal += Decimal('10')
          node_2_bal = self.check_fee_amount(self.nodes[2].getbalance(), node_2_bal - Decimal('10'), fee_per_byte, self.get_vsize(self.nodes[2].gettransaction(txid)['hex']))
          assert_equal(self.nodes[0].getbalance(), node_0_bal)
  
          # Sendmany 10 UMK with subtract fee from amount
          txid = self.nodes[2].sendmany('', {address: 10}, 0, "", [address])
          self.generate(self.nodes[2], 1)
          self.sync_all(self.nodes[0:3])
          node_2_bal -= Decimal('10')
          assert_equal(self.nodes[2].getbalance(), node_2_bal)
          node_0_bal = self.check_fee_amount(self.nodes[0].getbalance(), node_0_bal + Decimal('10'), fee_per_byte, self.get_vsize(self.nodes[2].gettransaction(txid)['hex']))
  
          self.log.info("Test sendmany with fee_rate param (explicit fee rate in sat/vB)")
          fee_rate_sat_vb = 2
          fee_rate_umk_kvb = fee_rate_sat_vb * 1e3 / 1e8
          explicit_fee_rate_umk_kvb = Decimal(fee_rate_umk_kvb) / 1000
  
          # Test passing fee_rate as a string
          txid = self.nodes[2].sendmany(amounts={address: 10}, fee_rate=str(fee_rate_sat_vb))
          self.generate(self.nodes[2], 1)
          self.sync_all(self.nodes[0:3])
          balance = self.nodes[2].getbalance()
          node_2_bal = self.check_fee_amount(balance, node_2_bal - Decimal('10'), explicit_fee_rate_umk_kvb, self.get_vsize(self.nodes[2].gettransaction(txid)['hex']))
          assert_equal(balance, node_2_bal)
          node_0_bal += Decimal('10')
          assert_equal(self.nodes[0].getbalance(), node_0_bal)
  
          # Test passing fee_rate as an integer
          amount = Decimal("0.0001")
          txid = self.nodes[2].sendmany(amounts={address: amount}, fee_rate=fee_rate_sat_vb)
          self.generate(self.nodes[2], 1)
          self.sync_all(self.nodes[0:3])
          balance = self.nodes[2].getbalance()
          node_2_bal = self.check_fee_amount(balance, node_2_bal - amount, explicit_fee_rate_umk_kvb, self.get_vsize(self.nodes[2].gettransaction(txid)['hex']))
          assert_equal(balance, node_2_bal)
          node_0_bal += amount
          assert_equal(self.nodes[0].getbalance(), node_0_bal)
  
          for key in ["totalFee", "feeRate"]:
              assert_raises_rpc_error(-8, "Unknown named parameter key", self.nodes[2].sendtoaddress, address=address, amount=1, fee_rate=1, key=1)
  
          # Test setting explicit fee rate just below the minimum.
          self.log.info("Test sendmany raises 'fee rate too low' if fee_rate of 0.99999999 is passed")
          assert_raises_rpc_error(-6, "Fee rate (0.999 sat/vB) is lower than the minimum fee rate setting (1.000 sat/vB)",
              self.nodes[2].sendmany, amounts={address: 10}, fee_rate=0.999)
  
          self.log.info("Test sendmany raises if an invalid fee_rate is passed")
          # Test fee_rate with zero values.
          msg = "Fee rate (0.000 sat/vB) is lower than the minimum fee rate setting (1.000 sat/vB)"
          for zero_value in [0, 0.000, 0.00000000, "0", "0.000", "0.00000000"]:
              assert_raises_rpc_error(-6, msg, self.nodes[2].sendmany, amounts={address: 1}, fee_rate=zero_value)
          msg = "Invalid amount"
          # Test fee_rate values that don't pass fixed-point parsing checks.
          for invalid_value in ["", 0.000000001, 1e-09, 1.111111111, 1111111111111111, "31.999999999999999999999"]:
              assert_raises_rpc_error(-3, msg, self.nodes[2].sendmany, amounts={address: 1.0}, fee_rate=invalid_value)
          # Test fee_rate values that cannot be represented in sat/vB.
          for invalid_value in [0.0001, 0.00000001, 0.00099999, 31.99999999, "0.0001", "0.00000001", "0.00099999", "31.99999999"]:
              assert_raises_rpc_error(-3, msg, self.nodes[2].sendmany, amounts={address: 10}, fee_rate=invalid_value)
          # Test fee_rate out of range (negative number).
          assert_raises_rpc_error(-3, OUT_OF_RANGE, self.nodes[2].sendmany, amounts={address: 10}, fee_rate=-1)
          # Test type error.
          for invalid_value in [True, {"foo": "bar"}]:
              assert_raises_rpc_error(-3, NOT_A_NUMBER_OR_STRING, self.nodes[2].sendmany, amounts={address: 10}, fee_rate=invalid_value)
  
          self.log.info("Test sendmany raises if an invalid conf_target or estimate_mode is passed")
          for target, mode in product([-1, 0, 1009], ["economical", "conservative"]):
              assert_raises_rpc_error(-8, "Invalid conf_target, must be between 1 and 1008",  # max value of 1008 per src/policy/fees.h
                  self.nodes[2].sendmany, amounts={address: 1}, conf_target=target, estimate_mode=mode)
          for target, mode in product([-1, 0], ["umk/kb", "sat/b"]):
              assert_raises_rpc_error(-8, 'Invalid estimate_mode parameter, must be one of: "unset", "economical", "conservative"',
                  self.nodes[2].sendmany, amounts={address: 1}, conf_target=target, estimate_mode=mode)
  
          self.start_node(3, self.nodes[3].extra_args)
          self.connect_nodes(0, 3)
          self.sync_all()
  
          # check if we can list zero value tx as available coins
          # 1. create raw_tx
          # 2. hex-changed one output to 0.0
          # 3. sign and send
          # 4. check if recipient (node0) can list the zero value tx
          usp = self.nodes[1].listunspent(query_options={'minimumAmount': '49.998'})[0]
          inputs = [{"txid": usp['txid'], "vout": usp['vout']}]
          outputs = {self.nodes[1].getnewaddress(): 49.998, self.nodes[0].getnewaddress(): 11.11}
  
          raw_tx = self.nodes[1].createrawtransaction(inputs, outputs).replace("c0833842", "00000000")  # replace 11.11 with 0.0 (int32)
          signed_raw_tx = self.nodes[1].signrawtransactionwithwallet(raw_tx)
          decoded_raw_tx = self.nodes[1].decoderawtransaction(signed_raw_tx['hex'])
          zero_value_txid = decoded_raw_tx['txid']
          self.nodes[1].sendrawtransaction(signed_raw_tx['hex'])
  
          self.sync_all()
          self.generate(self.nodes[1], 1)  # mine a block
          self.sync_all()
  
          unspent_txs = self.nodes[0].listunspent()  # zero value tx must be in listunspents output
          found = False
          for uTx in unspent_txs:
              if uTx['txid'] == zero_value_txid:
                  found = True
                  assert_equal(uTx['amount'], Decimal('0'))
          assert found
  
          self.log.info("Test -walletbroadcast")
          self.stop_nodes()
          self.start_node(0, ["-walletbroadcast=0"])
          self.start_node(1, ["-walletbroadcast=0"])
          self.start_node(2, ["-walletbroadcast=0"])
          self.connect_nodes(0, 1)
          self.connect_nodes(1, 2)
          self.connect_nodes(0, 2)
          self.sync_all(self.nodes[0:3])
  
          txid_not_broadcast = self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), 2)
          tx_obj_not_broadcast = self.nodes[0].gettransaction(txid_not_broadcast)
          self.generate(self.nodes[1], 1)  # mine a block, tx should not be in there
          self.sync_all(self.nodes[0:3])
          assert_equal(self.nodes[2].getbalance(), node_2_bal)  # should not be changed because tx was not broadcasted
  
          # now broadcast from another node, mine a block, sync, and check the balance
          self.nodes[1].sendrawtransaction(tx_obj_not_broadcast['hex'])
          self.generate(self.nodes[1], 1)
          self.sync_all(self.nodes[0:3])
          node_2_bal += 2
          tx_obj_not_broadcast = self.nodes[0].gettransaction(txid_not_broadcast)
          assert_equal(self.nodes[2].getbalance(), node_2_bal)
  
          # create another tx
          self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), 2)
  
          # restart the nodes with -walletbroadcast=1
          self.stop_nodes()
          self.start_node(0)
          self.start_node(1)
          self.start_node(2)
          self.connect_nodes(0, 1)
          self.connect_nodes(1, 2)
          self.connect_nodes(0, 2)
          self.sync_blocks(self.nodes[0:3])
  
          self.generate(self.nodes[0], 1)
          self.sync_blocks(self.nodes[0:3])
          node_2_bal += 2
  
          # tx should be added to balance because after restarting the nodes tx should be broadcast
          assert_equal(self.nodes[2].getbalance(), node_2_bal)
  
          # send a tx with value in a string (PR#6380 +)
          txid = self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), "2")
          tx_obj = self.nodes[0].gettransaction(txid)
          assert_equal(tx_obj['amount'], Decimal('-2'))
  
          txid = self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), "0.0001")
          tx_obj = self.nodes[0].gettransaction(txid)
          assert_equal(tx_obj['amount'], Decimal('-0.0001'))
  
          # check if JSON parser can handle scientific notation in strings
          txid = self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), "1e-4")
          tx_obj = self.nodes[0].gettransaction(txid)
          assert_equal(tx_obj['amount'], Decimal('-0.0001'))
  
          # General checks for errors from incorrect inputs
          # This will raise an exception because the amount is negative
          assert_raises_rpc_error(-3, OUT_OF_RANGE, self.nodes[0].sendtoaddress, self.nodes[2].getnewaddress(), "-1")
  
          # This will raise an exception because the amount type is wrong
          assert_raises_rpc_error(-3, "Invalid amount", self.nodes[0].sendtoaddress, self.nodes[2].getnewaddress(), "1f-4")
  
          # This will raise an exception since generate does not accept a string
          assert_raises_rpc_error(-1, "not an integer", self.generate, self.nodes[0], "2")
  
          if not self.options.descriptors:
  
              # This will raise an exception for the invalid private key format
              assert_raises_rpc_error(-5, "Invalid private key encoding", self.nodes[0].importprivkey, "invalid")
  
              # This will raise an exception for importing an address with the PS2H flag
              temp_address = self.nodes[1].getnewaddress("", "p2sh-segwit")
              assert_raises_rpc_error(-5, "Cannot use the p2sh flag with an address - use a script instead", self.nodes[0].importaddress, temp_address, "label", False, True)
  
              # This will raise an exception for attempting to dump the private key of an address you do not own
              assert_raises_rpc_error(-3, "Address does not refer to a key", self.nodes[0].dumpprivkey, temp_address)
  
              # This will raise an exception for attempting to get the private key of an invalid Umkoin address
              assert_raises_rpc_error(-5, "Invalid Umkoin address", self.nodes[0].dumpprivkey, "invalid")
  
              # This will raise an exception for attempting to set a label for an invalid Umkoin address
              assert_raises_rpc_error(-5, "Invalid Umkoin address", self.nodes[0].setlabel, "invalid address", "label")
  
              # This will raise an exception for importing an invalid address
              assert_raises_rpc_error(-5, "Invalid Umkoin address or script", self.nodes[0].importaddress, "invalid")
  
              # This will raise an exception for attempting to import a pubkey that isn't in hex
              assert_raises_rpc_error(-5, "Pubkey must be a hex string", self.nodes[0].importpubkey, "not hex")
  
              # This will raise an exception for importing an invalid pubkey
              assert_raises_rpc_error(-5, "Pubkey is not a valid public key", self.nodes[0].importpubkey, "5361746f736869204e616b616d6f746f")
  
              # Bech32m addresses cannot be imported into a legacy wallet
              assert_raises_rpc_error(-5, "Bech32m addresses cannot be imported into legacy wallets", self.nodes[0].importaddress, "bcrt1p0xlxvlhemja6c4dqv22uapctqupfhlxm9h8z3k2e72q4k9hcz7vqc8gma6")
  
              # Import address and private key to check correct behavior of spendable unspents
              # 1. Send some coins to generate new UTXO
              address_to_import = self.nodes[2].getnewaddress()
              txid = self.nodes[0].sendtoaddress(address_to_import, 1)
              self.sync_mempools(self.nodes[0:3])
              vout = find_vout_for_address(self.nodes[2], txid, address_to_import)
              self.nodes[2].lockunspent(False, [{"txid": txid, "vout": vout}])
              self.generate(self.nodes[0], 1)
              self.sync_all(self.nodes[0:3])
  
              self.log.info("Test sendtoaddress with fee_rate param (explicit fee rate in sat/vB)")
              prebalance = self.nodes[2].getbalance()
              assert prebalance > 2
              address = self.nodes[1].getnewaddress()
              amount = 3
              fee_rate_sat_vb = 2
              fee_rate_umk_kvb = fee_rate_sat_vb * 1e3 / 1e8
              # Test passing fee_rate as an integer
              txid = self.nodes[2].sendtoaddress(address=address, amount=amount, fee_rate=fee_rate_sat_vb)
              tx_size = self.get_vsize(self.nodes[2].gettransaction(txid)['hex'])
              self.generate(self.nodes[0], 1)
              self.sync_all(self.nodes[0:3])
              postbalance = self.nodes[2].getbalance()
              fee = prebalance - postbalance - Decimal(amount)
              assert_fee_amount(fee, tx_size, Decimal(fee_rate_umk_kvb))
  
              prebalance = self.nodes[2].getbalance()
              amount = Decimal("0.001")
              fee_rate_sat_vb = 1.23
              fee_rate_umk_kvb = fee_rate_sat_vb * 1e3 / 1e8
              # Test passing fee_rate as a string
              txid = self.nodes[2].sendtoaddress(address=address, amount=amount, fee_rate=str(fee_rate_sat_vb))
              tx_size = self.get_vsize(self.nodes[2].gettransaction(txid)['hex'])
              self.generate(self.nodes[0], 1)
              self.sync_all(self.nodes[0:3])
              postbalance = self.nodes[2].getbalance()
              fee = prebalance - postbalance - amount
              assert_fee_amount(fee, tx_size, Decimal(fee_rate_umk_kvb))
  
              for key in ["totalFee", "feeRate"]:
                  assert_raises_rpc_error(-8, "Unknown named parameter key", self.nodes[2].sendtoaddress, address=address, amount=1, fee_rate=1, key=1)
  
              # Test setting explicit fee rate just below the minimum.
              self.log.info("Test sendtoaddress raises 'fee rate too low' if fee_rate of 0.99999999 is passed")
              assert_raises_rpc_error(-6, "Fee rate (0.999 sat/vB) is lower than the minimum fee rate setting (1.000 sat/vB)",
                  self.nodes[2].sendtoaddress, address=address, amount=1, fee_rate=0.999)
  
              self.log.info("Test sendtoaddress raises if an invalid fee_rate is passed")
              # Test fee_rate with zero values.
              msg = "Fee rate (0.000 sat/vB) is lower than the minimum fee rate setting (1.000 sat/vB)"
              for zero_value in [0, 0.000, 0.00000000, "0", "0.000", "0.00000000"]:
                  assert_raises_rpc_error(-6, msg, self.nodes[2].sendtoaddress, address=address, amount=1, fee_rate=zero_value)
              msg = "Invalid amount"
              # Test fee_rate values that don't pass fixed-point parsing checks.
              for invalid_value in ["", 0.000000001, 1e-09, 1.111111111, 1111111111111111, "31.999999999999999999999"]:
                  assert_raises_rpc_error(-3, msg, self.nodes[2].sendtoaddress, address=address, amount=1.0, fee_rate=invalid_value)
              # Test fee_rate values that cannot be represented in sat/vB.
              for invalid_value in [0.0001, 0.00000001, 0.00099999, 31.99999999, "0.0001", "0.00000001", "0.00099999", "31.99999999"]:
                  assert_raises_rpc_error(-3, msg, self.nodes[2].sendtoaddress, address=address, amount=10, fee_rate=invalid_value)
              # Test fee_rate out of range (negative number).
              assert_raises_rpc_error(-3, OUT_OF_RANGE, self.nodes[2].sendtoaddress, address=address, amount=1.0, fee_rate=-1)
              # Test type error.
              for invalid_value in [True, {"foo": "bar"}]:
                  assert_raises_rpc_error(-3, NOT_A_NUMBER_OR_STRING, self.nodes[2].sendtoaddress, address=address, amount=1.0, fee_rate=invalid_value)
  
              self.log.info("Test sendtoaddress raises if an invalid conf_target or estimate_mode is passed")
              for target, mode in product([-1, 0, 1009], ["economical", "conservative"]):
                  assert_raises_rpc_error(-8, "Invalid conf_target, must be between 1 and 1008",  # max value of 1008 per src/policy/fees.h
                      self.nodes[2].sendtoaddress, address=address, amount=1, conf_target=target, estimate_mode=mode)
              for target, mode in product([-1, 0], ["umk/kb", "sat/b"]):
                  assert_raises_rpc_error(-8, 'Invalid estimate_mode parameter, must be one of: "unset", "economical", "conservative"',
                      self.nodes[2].sendtoaddress, address=address, amount=1, conf_target=target, estimate_mode=mode)
  
              # 2. Import address from node2 to node1
              self.nodes[1].importaddress(address_to_import)
  
              # 3. Validate that the imported address is watch-only on node1
              assert self.nodes[1].getaddressinfo(address_to_import)["iswatchonly"]
  
              # 4. Check that the unspents after import are not spendable
              assert_array_result(self.nodes[1].listunspent(),
                                  {"address": address_to_import},
                                  {"spendable": False})
  
              # 5. Import private key of the previously imported address on node1
              priv_key = self.nodes[2].dumpprivkey(address_to_import)
              self.nodes[1].importprivkey(priv_key)
  
              # 6. Check that the unspents are now spendable on node1
              assert_array_result(self.nodes[1].listunspent(),
                                  {"address": address_to_import},
                                  {"spendable": True})
  
          # Mine a block from node0 to an address from node1
          coinbase_addr = self.nodes[1].getnewaddress()
          block_hash = self.generatetoaddress(self.nodes[0], 1, coinbase_addr)[0]
          coinbase_txid = self.nodes[0].getblock(block_hash)['tx'][0]
          self.sync_all(self.nodes[0:3])
  
          # Check that the txid and balance is found by node1
          self.nodes[1].gettransaction(coinbase_txid)
  
          # check if wallet or blockchain maintenance changes the balance
          self.sync_all(self.nodes[0:3])
          blocks = self.generate(self.nodes[0], 2)
          self.sync_all(self.nodes[0:3])
          balance_nodes = [self.nodes[i].getbalance() for i in range(3)]
          block_count = self.nodes[0].getblockcount()
  
          # Check modes:
          #   - True: unicode escaped as \u....
          #   - False: unicode directly as UTF-8
          for mode in [True, False]:
              self.nodes[0].rpc.ensure_ascii = mode
              # unicode check: Basic Multilingual Plane, Supplementary Plane respectively
              for label in [u'рыба', u'𝅘𝅥𝅯']:
                  addr = self.nodes[0].getnewaddress()
                  self.nodes[0].setlabel(addr, label)
                  test_address(self.nodes[0], addr, labels=[label])
                  assert label in self.nodes[0].listlabels()
          self.nodes[0].rpc.ensure_ascii = True  # restore to default
  
          # -reindex tests
          chainlimit = 6
          self.log.info("Test -reindex")
          self.stop_nodes()
          # set lower ancestor limit for later
          self.start_node(0, ['-reindex', "-limitancestorcount=" + str(chainlimit)])
          self.start_node(1, ['-reindex', "-limitancestorcount=" + str(chainlimit)])
          self.start_node(2, ['-reindex', "-limitancestorcount=" + str(chainlimit)])
          # reindex will leave rpc warm up "early"; Wait for it to finish
          self.wait_until(lambda: [block_count] * 3 == [self.nodes[i].getblockcount() for i in range(3)])
          assert_equal(balance_nodes, [self.nodes[i].getbalance() for i in range(3)])
  
          # Exercise listsinceblock with the last two blocks
          coinbase_tx_1 = self.nodes[0].listsinceblock(blocks[0])
          assert_equal(coinbase_tx_1["lastblock"], blocks[1])
          assert_equal(len(coinbase_tx_1["transactions"]), 1)
          assert_equal(coinbase_tx_1["transactions"][0]["blockhash"], blocks[1])
          assert_equal(len(self.nodes[0].listsinceblock(blocks[1])["transactions"]), 0)
  
          # ==Check that wallet prefers to use coins that don't exceed mempool limits =====
  
          # Get all non-zero utxos together
          chain_addrs = [self.nodes[0].getnewaddress(), self.nodes[0].getnewaddress()]
          singletxid = self.nodes[0].sendtoaddress(chain_addrs[0], self.nodes[0].getbalance(), "", "", True)
          self.generate(self.nodes[0], 1)
          node0_balance = self.nodes[0].getbalance()
          # Split into two chains
          rawtx = self.nodes[0].createrawtransaction([{"txid": singletxid, "vout": 0}], {chain_addrs[0]: node0_balance / 2 - Decimal('0.01'), chain_addrs[1]: node0_balance / 2 - Decimal('0.01')})
          signedtx = self.nodes[0].signrawtransactionwithwallet(rawtx)
          singletxid = self.nodes[0].sendrawtransaction(hexstring=signedtx["hex"], maxfeerate=0)
          self.generate(self.nodes[0], 1)
  
          # Make a long chain of unconfirmed payments without hitting mempool limit
          # Each tx we make leaves only one output of change on a chain 1 longer
          # Since the amount to send is always much less than the outputs, we only ever need one output
          # So we should be able to generate exactly chainlimit txs for each original output
          sending_addr = self.nodes[1].getnewaddress()
          txid_list = []
          for _ in range(chainlimit * 2):
              txid_list.append(self.nodes[0].sendtoaddress(sending_addr, Decimal('0.0001')))
          assert_equal(self.nodes[0].getmempoolinfo()['size'], chainlimit * 2)
          assert_equal(len(txid_list), chainlimit * 2)
  
          # Without walletrejectlongchains, we will still generate a txid
          # The tx will be stored in the wallet but not accepted to the mempool
          extra_txid = self.nodes[0].sendtoaddress(sending_addr, Decimal('0.0001'))
          assert extra_txid not in self.nodes[0].getrawmempool()
          assert extra_txid in [tx["txid"] for tx in self.nodes[0].listtransactions()]
          self.nodes[0].abandontransaction(extra_txid)
          total_txs = len(self.nodes[0].listtransactions("*", 99999))
  
          # Try with walletrejectlongchains
          # Double chain limit but require combining inputs, so we pass AttemptSelection
          self.stop_node(0)
          extra_args = ["-walletrejectlongchains", "-limitancestorcount=" + str(2 * chainlimit)]
          self.start_node(0, extra_args=extra_args)
  
          # wait until the wallet has submitted all transactions to the mempool
          self.wait_until(lambda: len(self.nodes[0].getrawmempool()) == chainlimit * 2)
  
          # Prevent potential race condition when calling wallet RPCs right after restart
          self.nodes[0].syncwithvalidationinterfacequeue()
  
          node0_balance = self.nodes[0].getbalance()
          # With walletrejectlongchains we will not create the tx and store it in our wallet.
          assert_raises_rpc_error(-6, "Transaction has too long of a mempool chain", self.nodes[0].sendtoaddress, sending_addr, node0_balance - Decimal('0.01'))
  
          # Verify nothing new in wallet
          assert_equal(total_txs, len(self.nodes[0].listtransactions("*", 99999)))
  
          # Test getaddressinfo on external address. Note that these addresses are taken from disablewallet.py
          assert_raises_rpc_error(-5, "Invalid prefix for Base58-encoded address", self.nodes[0].getaddressinfo, "3J98t1WpEZ73CNmQviecrnyiWrnqRhWNLy")
          address_info = self.nodes[0].getaddressinfo("mneYUmWYsuk7kySiURxCi3AGxrAqZxLgPZ")
          assert_equal(address_info['address'], "mneYUmWYsuk7kySiURxCi3AGxrAqZxLgPZ")
          assert_equal(address_info["scriptPubKey"], "76a9144e3854046c7bd1594ac904e4793b6a45b36dea0988ac")
          assert not address_info["ismine"]
          assert not address_info["iswatchonly"]
          assert not address_info["isscript"]
          assert not address_info["ischange"]
  
          # Test getaddressinfo 'ischange' field on change address.
          self.generate(self.nodes[0], 1)
          destination = self.nodes[1].getnewaddress()
          txid = self.nodes[0].sendtoaddress(destination, 0.123)
          tx = self.nodes[0].gettransaction(txid=txid, verbose=True)['decoded']
          output_addresses = [vout['scriptPubKey']['address'] for vout in tx["vout"]]
          assert len(output_addresses) > 1
          for address in output_addresses:
              ischange = self.nodes[0].getaddressinfo(address)['ischange']
              assert_equal(ischange, address != destination)
              if ischange:
                  change = address
          self.nodes[0].setlabel(change, 'foobar')
          assert_equal(self.nodes[0].getaddressinfo(change)['ischange'], False)
  
          # Test gettransaction response with different arguments.
          self.log.info("Testing gettransaction response with different arguments...")
          self.nodes[0].setlabel(change, 'baz')
          baz = self.nodes[0].listtransactions(label="baz", count=1)[0]
          expected_receive_vout = {"label":    "baz",
                                   "address":  baz["address"],
                                   "amount":   baz["amount"],
                                   "category": baz["category"],
                                   "vout":     baz["vout"]}
          expected_fields = frozenset({'amount', 'bip125-replaceable', 'confirmations', 'details', 'fee',
                                       'hex', 'time', 'timereceived', 'trusted', 'txid', 'walletconflicts'})
          verbose_field = "decoded"
          expected_verbose_fields = expected_fields | {verbose_field}
  
          self.log.debug("Testing gettransaction response without verbose")
          tx = self.nodes[0].gettransaction(txid=txid)
          assert_equal(set([*tx]), expected_fields)
          assert_array_result(tx["details"], {"category": "receive"}, expected_receive_vout)
  
          self.log.debug("Testing gettransaction response with verbose set to False")
          tx = self.nodes[0].gettransaction(txid=txid, verbose=False)
          assert_equal(set([*tx]), expected_fields)
          assert_array_result(tx["details"], {"category": "receive"}, expected_receive_vout)
  
          self.log.debug("Testing gettransaction response with verbose set to True")
          tx = self.nodes[0].gettransaction(txid=txid, verbose=True)
          assert_equal(set([*tx]), expected_verbose_fields)
          assert_array_result(tx["details"], {"category": "receive"}, expected_receive_vout)
          assert_equal(tx[verbose_field], self.nodes[0].decoderawtransaction(tx["hex"]))
  
          self.log.info("Test send* RPCs with verbose=True")
          address = self.nodes[0].getnewaddress("test")
          txid_feeReason_one = self.nodes[2].sendtoaddress(address=address, amount=5, verbose=True)
          assert_equal(txid_feeReason_one["fee_reason"], "Fallback fee")
          txid_feeReason_two = self.nodes[2].sendmany(dummy='', amounts={address: 5}, verbose=True)
          assert_equal(txid_feeReason_two["fee_reason"], "Fallback fee")
          self.log.info("Test send* RPCs with verbose=False")
          txid_feeReason_three = self.nodes[2].sendtoaddress(address=address, amount=5, verbose=False)
          assert_equal(self.nodes[2].gettransaction(txid_feeReason_three)['txid'], txid_feeReason_three)
          txid_feeReason_four = self.nodes[2].sendmany(dummy='', amounts={address: 5}, verbose=False)
          assert_equal(self.nodes[2].gettransaction(txid_feeReason_four)['txid'], txid_feeReason_four)
  
  
  if __name__ == '__main__':
      WalletTest().main()
  