text: #!/usr/bin/env python3
  # Copyright (c) 2016-2020 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 bumpfee RPC.
  
  Verifies that the bumpfee RPC creates replacement transactions successfully when
  its preconditions are met, and returns appropriate errors in other cases.
  
  This module consists of around a dozen individual test cases implemented in the
  top-level functions named as test_<test_case_description>. The test functions
  can be disabled or reordered if needed for debugging. If new test cases are
  added in the future, they should try to follow the same convention and not
  make assumptions about execution order.
  """
  from decimal import Decimal
  import io
  
  from test_framework.blocktools import add_witness_commitment, create_block, create_coinbase, send_to_witness
  from test_framework.messages import BIP125_SEQUENCE_NUMBER, CTransaction
  from test_framework.test_framework import BitcoinTestFramework
  from test_framework.util import (
      assert_equal,
      assert_greater_than,
      assert_raises_rpc_error,
      hex_str_to_bytes,
  )
  
  WALLET_PASSPHRASE = "test"
  WALLET_PASSPHRASE_TIMEOUT = 3600
  
  # Fee rates (sat/vB)
  INSUFFICIENT =      1
  ECONOMICAL   =     50
  NORMAL       =    100
  HIGH         =    500
  TOO_HIGH     = 100000
  
  
  class BumpFeeTest(BitcoinTestFramework):
      def set_test_params(self):
          self.num_nodes = 2
          self.setup_clean_chain = True
          self.extra_args = [[
              "-walletrbf={}".format(i),
              "-mintxfee=0.00002",
              "-addresstype=bech32",
          ] for i in range(self.num_nodes)]
  
      def skip_test_if_missing_module(self):
          self.skip_if_no_wallet()
  
      def clear_mempool(self):
          # Clear mempool between subtests. The subtests may only depend on chainstate (utxos)
          self.nodes[1].generate(1)
          self.sync_all()
  
      def run_test(self):
          # Encrypt wallet for test_locked_wallet_fails test
          self.nodes[1].encryptwallet(WALLET_PASSPHRASE)
          self.nodes[1].walletpassphrase(WALLET_PASSPHRASE, WALLET_PASSPHRASE_TIMEOUT)
  
          peer_node, rbf_node = self.nodes
          rbf_node_address = rbf_node.getnewaddress()
  
          # fund rbf node with 10 coins of 0.001 btc (100,000 satoshis)
          self.log.info("Mining blocks...")
          peer_node.generate(110)
          self.sync_all()
          # Dogecoin: Coinbase maturity is much higher, so we mine to the RBF node for funding
          rbf_node.generate(140)
          self.sync_all()
          for _ in range(25):
              peer_node.sendtoaddress(rbf_node_address, 0.001)
          self.sync_all()
          peer_node.generate(1)
          self.sync_all()
          assert_equal(rbf_node.getbalance(), Decimal("0.025"))
  
          self.log.info("Running tests")
          dest_address = peer_node.getnewaddress()
          for mode in ["default", "fee_rate"]:
              test_simple_bumpfee_succeeds(self, mode, rbf_node, peer_node, dest_address)
          self.test_invalid_parameters(rbf_node, peer_node, dest_address)
          test_segwit_bumpfee_succeeds(self, rbf_node, dest_address)
          test_nonrbf_bumpfee_fails(self, peer_node, dest_address)
          test_notmine_bumpfee_fails(self, rbf_node, peer_node, dest_address)
          test_bumpfee_with_descendant_fails(self, rbf_node, rbf_node_address, dest_address)
          test_dust_to_fee(self, rbf_node, dest_address)
          test_watchonly_psbt(self, peer_node, rbf_node, dest_address)
          test_rebumping(self, rbf_node, dest_address)
          test_rebumping_not_replaceable(self, rbf_node, dest_address)
          test_unconfirmed_not_spendable(self, rbf_node, rbf_node_address)
          test_bumpfee_metadata(self, rbf_node, dest_address)
          test_locked_wallet_fails(self, rbf_node, dest_address)
          test_change_script_match(self, rbf_node, dest_address)
          test_settxfee(self, rbf_node, dest_address)
          test_maxtxfee_fails(self, rbf_node, dest_address)
          # These tests wipe out a number of utxos that are expected in other tests
          test_small_output_with_feerate_succeeds(self, rbf_node, dest_address)
          test_no_more_inputs_fails(self, rbf_node, dest_address)
  
      def test_invalid_parameters(self, rbf_node, peer_node, dest_address):
          self.log.info('Test invalid parameters')
          rbfid = spend_one_input(rbf_node, dest_address)
          self.sync_mempools((rbf_node, peer_node))
          assert rbfid in rbf_node.getrawmempool() and rbfid in peer_node.getrawmempool()
  
          for key in ["totalFee", "feeRate"]:
              assert_raises_rpc_error(-3, "Unexpected key {}".format(key), rbf_node.bumpfee, rbfid, {key: NORMAL})
  
          # Bumping to just above minrelay should fail to increase the total fee enough.
          assert_raises_rpc_error(-8, "Insufficient total fee 0.00000141", rbf_node.bumpfee, rbfid, {"fee_rate": INSUFFICIENT})
  
          self.log.info("Test invalid fee rate settings")
          assert_raises_rpc_error(-8, "Insufficient total fee 0.00", rbf_node.bumpfee, rbfid, {"fee_rate": 0})
          assert_raises_rpc_error(-4, "Specified or calculated fee 0.141 is too high (cannot be higher than -maxtxfee 0.10",
              rbf_node.bumpfee, rbfid, {"fee_rate": TOO_HIGH})
          assert_raises_rpc_error(-3, "Amount out of range", rbf_node.bumpfee, rbfid, {"fee_rate": -1})
          for value in [{"foo": "bar"}, True]:
              assert_raises_rpc_error(-3, "Amount is not a number or string", rbf_node.bumpfee, rbfid, {"fee_rate": value})
          assert_raises_rpc_error(-3, "Invalid amount", rbf_node.bumpfee, rbfid, {"fee_rate": ""})
  
          self.log.info("Test explicit fee rate raises RPC error if both fee_rate and conf_target are passed")
          assert_raises_rpc_error(-8, "Cannot specify both conf_target and fee_rate. Please provide either a confirmation "
              "target in blocks for automatic fee estimation, or an explicit fee rate.",
              rbf_node.bumpfee, rbfid, {"conf_target": NORMAL, "fee_rate": NORMAL})
  
          self.log.info("Test explicit fee rate raises RPC error if both fee_rate and estimate_mode are passed")
          assert_raises_rpc_error(-8, "Cannot specify both estimate_mode and fee_rate",
              rbf_node.bumpfee, rbfid, {"estimate_mode": "economical", "fee_rate": NORMAL})
  
          self.log.info("Test invalid conf_target settings")
          assert_raises_rpc_error(-8, "confTarget and conf_target options should not both be set",
              rbf_node.bumpfee, rbfid, {"confTarget": 123, "conf_target": 456})
  
          self.log.info("Test invalid estimate_mode settings")
          for k, v in {"number": 42, "object": {"foo": "bar"}}.items():
              assert_raises_rpc_error(-3, "Expected type string for estimate_mode, got {}".format(k),
                  rbf_node.bumpfee, rbfid, {"estimate_mode": v})
          for mode in ["foo", Decimal("3.1415"), "koinu/B", "DOGE/kB"]:
              assert_raises_rpc_error(-8, 'Invalid estimate_mode parameter, must be one of: "unset", "economical", "conservative"',
                  rbf_node.bumpfee, rbfid, {"estimate_mode": mode})
  
          self.clear_mempool()
  
  
  def test_simple_bumpfee_succeeds(self, mode, rbf_node, peer_node, dest_address):
      self.log.info('Test simple bumpfee: {}'.format(mode))
      rbfid = spend_one_input(rbf_node, dest_address)
      rbftx = rbf_node.gettransaction(rbfid)
      self.sync_mempools((rbf_node, peer_node))
      assert rbfid in rbf_node.getrawmempool() and rbfid in peer_node.getrawmempool()
      if mode == "fee_rate":
          bumped_psbt = rbf_node.psbtbumpfee(rbfid, {"fee_rate": str(NORMAL)})
          bumped_tx = rbf_node.bumpfee(rbfid, {"fee_rate": NORMAL})
      else:
          bumped_psbt = rbf_node.psbtbumpfee(rbfid)
          bumped_tx = rbf_node.bumpfee(rbfid)
      assert_equal(bumped_tx["errors"], [])
      assert bumped_tx["fee"] > -rbftx["fee"]
      assert_equal(bumped_tx["origfee"], -rbftx["fee"])
      assert "psbt" not in bumped_tx
      assert_equal(bumped_psbt["errors"], [])
      assert bumped_psbt["fee"] > -rbftx["fee"]
      assert_equal(bumped_psbt["origfee"], -rbftx["fee"])
      assert "psbt" in bumped_psbt
      # check that bumped_tx propagates, original tx was evicted and has a wallet conflict
      self.sync_mempools((rbf_node, peer_node))
      assert bumped_tx["txid"] in rbf_node.getrawmempool()
      assert bumped_tx["txid"] in peer_node.getrawmempool()
      assert rbfid not in rbf_node.getrawmempool()
      assert rbfid not in peer_node.getrawmempool()
      oldwtx = rbf_node.gettransaction(rbfid)
      assert len(oldwtx["walletconflicts"]) > 0
      # check wallet transaction replaces and replaced_by values
      bumpedwtx = rbf_node.gettransaction(bumped_tx["txid"])
      assert_equal(oldwtx["replaced_by_txid"], bumped_tx["txid"])
      assert_equal(bumpedwtx["replaces_txid"], rbfid)
      self.clear_mempool()
  
  
  def test_segwit_bumpfee_succeeds(self, rbf_node, dest_address):
      self.log.info('Test that segwit-sourcing bumpfee works')
      # Create a transaction with segwit output, then create an RBF transaction
      # which spends it, and make sure bumpfee can be called on it.
  
      segwit_in = next(u for u in rbf_node.listunspent() if u["amount"] == Decimal("0.001"))
      segwit_out = rbf_node.getaddressinfo(rbf_node.getnewaddress(address_type='bech32'))
      segwitid = send_to_witness(
          use_p2wsh=False,
          node=rbf_node,
          utxo=segwit_in,
          pubkey=segwit_out["pubkey"],
          encode_p2sh=False,
          amount=Decimal("0.0009"),
          sign=True)
  
      rbfraw = rbf_node.createrawtransaction([{
          'txid': segwitid,
          'vout': 0,
          "sequence": BIP125_SEQUENCE_NUMBER
      }], {dest_address: Decimal("0.0005"),
           rbf_node.getrawchangeaddress(): Decimal("0.0003")})
      rbfsigned = rbf_node.signrawtransactionwithwallet(rbfraw)
      rbfid = rbf_node.sendrawtransaction(rbfsigned["hex"])
      assert rbfid in rbf_node.getrawmempool()
  
      bumped_tx = rbf_node.bumpfee(rbfid)
      assert bumped_tx["txid"] in rbf_node.getrawmempool()
      assert rbfid not in rbf_node.getrawmempool()
      self.clear_mempool()
  
  
  def test_nonrbf_bumpfee_fails(self, peer_node, dest_address):
      self.log.info('Test that we cannot replace a non RBF transaction')
      not_rbfid = peer_node.sendtoaddress(dest_address, Decimal("0.00090000"))
      assert_raises_rpc_error(-4, "not BIP 125 replaceable", peer_node.bumpfee, not_rbfid)
      self.clear_mempool()
  
  
  def test_notmine_bumpfee_fails(self, rbf_node, peer_node, dest_address):
      self.log.info('Test that it cannot bump fee if non-owned inputs are included')
      # here, the rbftx has a peer_node coin and then adds a rbf_node input
      # Note that this test depends upon the RPC code checking input ownership prior to change outputs
      # (since it can't use fundrawtransaction, it lacks a proper change output)
      fee = Decimal("0.001")
      utxos = [node.listunspent(query_options={'minimumAmount': fee})[-1] for node in (rbf_node, peer_node)]
      inputs = [{
          "txid": utxo["txid"],
          "vout": utxo["vout"],
          "address": utxo["address"],
          "sequence": BIP125_SEQUENCE_NUMBER
      } for utxo in utxos]
      output_val = sum(utxo["amount"] for utxo in utxos) - fee
      rawtx = rbf_node.createrawtransaction(inputs, {dest_address: output_val})
      signedtx = rbf_node.signrawtransactionwithwallet(rawtx)
      signedtx = peer_node.signrawtransactionwithwallet(signedtx["hex"])
      rbfid = rbf_node.sendrawtransaction(signedtx["hex"])
      assert_raises_rpc_error(-4, "Transaction contains inputs that don't belong to this wallet",
                              rbf_node.bumpfee, rbfid)
      self.clear_mempool()
  
  
  def test_bumpfee_with_descendant_fails(self, rbf_node, rbf_node_address, dest_address):
      self.log.info('Test that fee cannot be bumped when it has descendant')
      # parent is send-to-self, so we don't have to check which output is change when creating the child tx
      parent_id = spend_one_input(rbf_node, rbf_node_address)
      tx = rbf_node.createrawtransaction([{"txid": parent_id, "vout": 0}], {dest_address: 0.00020000})
      tx = rbf_node.signrawtransactionwithwallet(tx)
      rbf_node.sendrawtransaction(tx["hex"])
      assert_raises_rpc_error(-8, "Transaction has descendants in the wallet", rbf_node.bumpfee, parent_id)
      self.clear_mempool()
  
  
  def test_small_output_with_feerate_succeeds(self, rbf_node, dest_address):
      self.log.info('Testing small output with feerate bump succeeds')
  
      # Make sure additional inputs exist
      rbf_node.generatetoaddress(101, rbf_node.getnewaddress())
      rbfid = spend_one_input(rbf_node, dest_address)
      input_list = rbf_node.getrawtransaction(rbfid, 1)["vin"]
      assert_equal(len(input_list), 1)
      original_txin = input_list[0]
      self.log.info('Keep bumping until transaction fee out-spends non-destination value')
      tx_fee = 0
      while True:
          input_list = rbf_node.getrawtransaction(rbfid, 1)["vin"]
          new_item = list(input_list)[0]
          assert_equal(len(input_list), 1)
          assert_equal(original_txin["txid"], new_item["txid"])
          assert_equal(original_txin["vout"], new_item["vout"])
          rbfid_new_details = rbf_node.bumpfee(rbfid)
          rbfid_new = rbfid_new_details["txid"]
          raw_pool = rbf_node.getrawmempool()
          assert rbfid not in raw_pool
          assert rbfid_new in raw_pool
          rbfid = rbfid_new
          tx_fee = rbfid_new_details["fee"]
  
          # Total value from input not going to destination
          if tx_fee > Decimal('0.00050000'):
              break
  
      # input(s) have been added
      final_input_list = rbf_node.getrawtransaction(rbfid, 1)["vin"]
      assert_greater_than(len(final_input_list), 1)
      # Original input is in final set
      assert [txin for txin in final_input_list
              if txin["txid"] == original_txin["txid"]
              and txin["vout"] == original_txin["vout"]]
  
      rbf_node.generatetoaddress(1, rbf_node.getnewaddress())
      assert_equal(rbf_node.gettransaction(rbfid)["confirmations"], 1)
      self.clear_mempool()
  
  
  def test_dust_to_fee(self, rbf_node, dest_address):
      self.log.info('Test that bumped output that is dust is dropped to fee')
      rbfid = spend_one_input(rbf_node, dest_address)
      fulltx = rbf_node.getrawtransaction(rbfid, 1)
      # The DER formatting used by Bitcoin to serialize ECDSA signatures means that signatures can have a
      # variable size of 70-72 bytes (or possibly even less), with most being 71 or 72 bytes. The signature
      # in the witness is divided by 4 for the vsize, so this variance can take the weight across a 4-byte
      # boundary. Thus expected transaction size (p2wpkh, 1 input, 2 outputs) is 140-141 vbytes, usually 141.
      if not 140 <= fulltx["vsize"] <= 141:
          raise AssertionError("Invalid tx vsize of {} (140-141 expected), full tx: {}".format(fulltx["vsize"], fulltx))
      # Bump with fee_rate of 350.25 sat/vB vbytes to create dust.
      # Expected fee is 141 vbytes * fee_rate 0.00350250 BTC / 1000 vbytes = 0.00049385 BTC.
      # or occasionally 140 vbytes * fee_rate 0.00350250 BTC / 1000 vbytes = 0.00049035 BTC.
      # Dust should be dropped to the fee, so actual bump fee is 0.00050000 BTC.
      bumped_tx = rbf_node.bumpfee(rbfid, {"fee_rate": 350.25})
      full_bumped_tx = rbf_node.getrawtransaction(bumped_tx["txid"], 1)
      assert_equal(bumped_tx["fee"], Decimal("0.00050000"))
      assert_equal(len(fulltx["vout"]), 2)
      assert_equal(len(full_bumped_tx["vout"]), 1)  # change output is eliminated
      assert_equal(full_bumped_tx["vout"][0]['value'], Decimal("0.00050000"))
      self.clear_mempool()
  
  
  def test_settxfee(self, rbf_node, dest_address):
      self.log.info('Test settxfee')
      assert_raises_rpc_error(-8, "txfee cannot be less than min relay tx fee", rbf_node.settxfee, Decimal('0.000005'))
      assert_raises_rpc_error(-8, "txfee cannot be less than wallet min fee", rbf_node.settxfee, Decimal('0.000015'))
      # check that bumpfee reacts correctly to the use of settxfee (paytxfee)
      rbfid = spend_one_input(rbf_node, dest_address)
      requested_feerate = Decimal("0.00025000")
      rbf_node.settxfee(requested_feerate)
      bumped_tx = rbf_node.bumpfee(rbfid)
      actual_feerate = bumped_tx["fee"] * 1000 / rbf_node.getrawtransaction(bumped_tx["txid"], True)["vsize"]
      # Assert that the difference between the requested feerate and the actual
      # feerate of the bumped transaction is small.
      assert_greater_than(Decimal("0.00001000"), abs(requested_feerate - actual_feerate))
      rbf_node.settxfee(Decimal("0.00000000"))  # unset paytxfee
  
      # check that settxfee respects -maxtxfee
      self.restart_node(1, ['-maxtxfee=0.000025'] + self.extra_args[1])
      assert_raises_rpc_error(-8, "txfee cannot be more than wallet max tx fee", rbf_node.settxfee, Decimal('0.00003'))
      self.restart_node(1, self.extra_args[1])
      rbf_node.walletpassphrase(WALLET_PASSPHRASE, WALLET_PASSPHRASE_TIMEOUT)
      self.connect_nodes(1, 0)
      self.clear_mempool()
  
  
  def test_maxtxfee_fails(self, rbf_node, dest_address):
      self.log.info('Test that bumpfee fails when it hits -maxtxfee')
      # size of bumped transaction (p2wpkh, 1 input, 2 outputs): 141 vbytes
      # expected bump fee of 141 vbytes * 0.00200000 BTC / 1000 vbytes = 0.00002820 BTC
      # which exceeds maxtxfee and is expected to raise
      self.restart_node(1, ['-maxtxfee=0.000025'] + self.extra_args[1])
      rbf_node.walletpassphrase(WALLET_PASSPHRASE, WALLET_PASSPHRASE_TIMEOUT)
      rbfid = spend_one_input(rbf_node, dest_address)
      assert_raises_rpc_error(-4, "Unable to create transaction. Fee exceeds maximum configured by user (e.g. -maxtxfee, maxfeerate)", rbf_node.bumpfee, rbfid)
      self.restart_node(1, self.extra_args[1])
      rbf_node.walletpassphrase(WALLET_PASSPHRASE, WALLET_PASSPHRASE_TIMEOUT)
      self.connect_nodes(1, 0)
      self.clear_mempool()
  
  
  def test_watchonly_psbt(self, peer_node, rbf_node, dest_address):
      self.log.info('Test that PSBT is returned for bumpfee in watchonly wallets')
      priv_rec_desc = "wpkh([00000001/84'/1'/0']tprv8ZgxMBicQKsPd7Uf69XL1XwhmjHopUGep8GuEiJDZmbQz6o58LninorQAfcKZWARbtRtfnLcJ5MQ2AtHcQJCCRUcMRvmDUjyEmNUWwx8UbK/0/*)#rweraev0"
      pub_rec_desc = rbf_node.getdescriptorinfo(priv_rec_desc)["descriptor"]
      priv_change_desc = "wpkh([00000001/84'/1'/0']tprv8ZgxMBicQKsPd7Uf69XL1XwhmjHopUGep8GuEiJDZmbQz6o58LninorQAfcKZWARbtRtfnLcJ5MQ2AtHcQJCCRUcMRvmDUjyEmNUWwx8UbK/1/*)#j6uzqvuh"
      pub_change_desc = rbf_node.getdescriptorinfo(priv_change_desc)["descriptor"]
      # Create a wallet with private keys that can sign PSBTs
      rbf_node.createwallet(wallet_name="signer", disable_private_keys=False, blank=True)
      signer = rbf_node.get_wallet_rpc("signer")
      assert signer.getwalletinfo()['private_keys_enabled']
      reqs = [{
          "desc": priv_rec_desc,
          "timestamp": 0,
          "range": [0,1],
          "internal": False,
          "keypool": False # Keys can only be imported to the keypool when private keys are disabled
      },
      {
          "desc": priv_change_desc,
          "timestamp": 0,
          "range": [0, 0],
          "internal": True,
          "keypool": False
      }]
      if self.options.descriptors:
          result = signer.importdescriptors(reqs)
      else:
          result = signer.importmulti(reqs)
      assert_equal(result, [{'success': True}, {'success': True}])
  
      # Create another wallet with just the public keys, which creates PSBTs
      rbf_node.createwallet(wallet_name="watcher", disable_private_keys=True, blank=True)
      watcher = rbf_node.get_wallet_rpc("watcher")
      assert not watcher.getwalletinfo()['private_keys_enabled']
  
      reqs = [{
          "desc": pub_rec_desc,
          "timestamp": 0,
          "range": [0, 10],
          "internal": False,
          "keypool": True,
          "watchonly": True,
          "active": True,
      }, {
          "desc": pub_change_desc,
          "timestamp": 0,
          "range": [0, 10],
          "internal": True,
          "keypool": True,
          "watchonly": True,
          "active": True,
      }]
      if self.options.descriptors:
          result = watcher.importdescriptors(reqs)
      else:
          result = watcher.importmulti(reqs)
      assert_equal(result, [{'success': True}, {'success': True}])
  
      funding_address1 = watcher.getnewaddress(address_type='bech32')
      funding_address2 = watcher.getnewaddress(address_type='bech32')
      peer_node.sendmany("", {funding_address1: 0.001, funding_address2: 0.001})
      peer_node.generate(1)
      self.sync_all()
  
      # Create single-input PSBT for transaction to be bumped
      psbt = watcher.walletcreatefundedpsbt([], {dest_address: 0.0005}, 0, {"fee_rate": 1}, True)['psbt']
      psbt_signed = signer.walletprocesspsbt(psbt=psbt, sign=True, sighashtype="ALL", bip32derivs=True)
      psbt_final = watcher.finalizepsbt(psbt_signed["psbt"])
      original_txid = watcher.sendrawtransaction(psbt_final["hex"])
      assert_equal(len(watcher.decodepsbt(psbt)["tx"]["vin"]), 1)
  
      # Bump fee, obnoxiously high to add additional watchonly input
      bumped_psbt = watcher.psbtbumpfee(original_txid, {"fee_rate": HIGH})
      assert_greater_than(len(watcher.decodepsbt(bumped_psbt['psbt'])["tx"]["vin"]), 1)
      assert "txid" not in bumped_psbt
      assert_equal(bumped_psbt["origfee"], -watcher.gettransaction(original_txid)["fee"])
      assert not watcher.finalizepsbt(bumped_psbt["psbt"])["complete"]
  
      # Sign bumped transaction
      bumped_psbt_signed = signer.walletprocesspsbt(psbt=bumped_psbt["psbt"], sign=True, sighashtype="ALL", bip32derivs=True)
      bumped_psbt_final = watcher.finalizepsbt(bumped_psbt_signed["psbt"])
      assert bumped_psbt_final["complete"]
  
      # Broadcast bumped transaction
      bumped_txid = watcher.sendrawtransaction(bumped_psbt_final["hex"])
      assert bumped_txid in rbf_node.getrawmempool()
      assert original_txid not in rbf_node.getrawmempool()
  
      rbf_node.unloadwallet("watcher")
      rbf_node.unloadwallet("signer")
      self.clear_mempool()
  
  
  def test_rebumping(self, rbf_node, dest_address):
      self.log.info('Test that re-bumping the original tx fails, but bumping successor works')
      rbfid = spend_one_input(rbf_node, dest_address)
      bumped = rbf_node.bumpfee(rbfid, {"fee_rate": ECONOMICAL})
      assert_raises_rpc_error(-4, "already bumped", rbf_node.bumpfee, rbfid, {"fee_rate": NORMAL})
      rbf_node.bumpfee(bumped["txid"], {"fee_rate": NORMAL})
      self.clear_mempool()
  
  
  def test_rebumping_not_replaceable(self, rbf_node, dest_address):
      self.log.info('Test that re-bumping non-replaceable fails')
      rbfid = spend_one_input(rbf_node, dest_address)
      bumped = rbf_node.bumpfee(rbfid, {"fee_rate": ECONOMICAL, "replaceable": False})
      assert_raises_rpc_error(-4, "Transaction is not BIP 125 replaceable", rbf_node.bumpfee, bumped["txid"],
                              {"fee_rate": NORMAL})
      self.clear_mempool()
  
  
  def test_unconfirmed_not_spendable(self, rbf_node, rbf_node_address):
      self.log.info('Test that unconfirmed outputs from bumped txns are not spendable')
      rbfid = spend_one_input(rbf_node, rbf_node_address)
      rbftx = rbf_node.gettransaction(rbfid)["hex"]
      assert rbfid in rbf_node.getrawmempool()
      bumpid = rbf_node.bumpfee(rbfid)["txid"]
      assert bumpid in rbf_node.getrawmempool()
      assert rbfid not in rbf_node.getrawmempool()
  
      # check that outputs from the bump transaction are not spendable
      # due to the replaces_txid check in CWallet::AvailableCoins
      assert_equal([t for t in rbf_node.listunspent(minconf=0, include_unsafe=False) if t["txid"] == bumpid], [])
  
      # submit a block with the rbf tx to clear the bump tx out of the mempool,
      # then invalidate the block so the rbf tx will be put back in the mempool.
      # This makes it possible to check whether the rbf tx outputs are
      # spendable before the rbf tx is confirmed.
      block = submit_block_with_tx(rbf_node, rbftx)
      # Can not abandon conflicted tx
      assert_raises_rpc_error(-5, 'Transaction not eligible for abandonment', lambda: rbf_node.abandontransaction(txid=bumpid))
      rbf_node.invalidateblock(block.hash)
      # Call abandon to make sure the wallet doesn't attempt to resubmit
      # the bump tx and hope the wallet does not rebroadcast before we call.
      rbf_node.abandontransaction(bumpid)
      assert bumpid not in rbf_node.getrawmempool()
      assert rbfid in rbf_node.getrawmempool()
  
      # check that outputs from the rbf tx are not spendable before the
      # transaction is confirmed, due to the replaced_by_txid check in
      # CWallet::AvailableCoins
      assert_equal([t for t in rbf_node.listunspent(minconf=0, include_unsafe=False) if t["txid"] == rbfid], [])
  
      # check that the main output from the rbf tx is spendable after confirmed
      rbf_node.generate(1)
      assert_equal(
          sum(1 for t in rbf_node.listunspent(minconf=0, include_unsafe=False)
              if t["txid"] == rbfid and t["address"] == rbf_node_address and t["spendable"]), 1)
      self.clear_mempool()
  
  
  def test_bumpfee_metadata(self, rbf_node, dest_address):
      self.log.info('Test that bumped txn metadata persists to new txn record')
      assert(rbf_node.getbalance() < 49)
      rbf_node.generatetoaddress(101, rbf_node.getnewaddress())
      rbfid = rbf_node.sendtoaddress(dest_address, 49, "comment value", "to value")
      bumped_tx = rbf_node.bumpfee(rbfid)
      bumped_wtx = rbf_node.gettransaction(bumped_tx["txid"])
      assert_equal(bumped_wtx["comment"], "comment value")
      assert_equal(bumped_wtx["to"], "to value")
      self.clear_mempool()
  
  
  def test_locked_wallet_fails(self, rbf_node, dest_address):
      self.log.info('Test that locked wallet cannot bump txn')
      rbfid = spend_one_input(rbf_node, dest_address)
      rbf_node.walletlock()
      assert_raises_rpc_error(-13, "Please enter the wallet passphrase with walletpassphrase first.",
                              rbf_node.bumpfee, rbfid)
      rbf_node.walletpassphrase(WALLET_PASSPHRASE, WALLET_PASSPHRASE_TIMEOUT)
      self.clear_mempool()
  
  
  def test_change_script_match(self, rbf_node, dest_address):
      self.log.info('Test that the same change addresses is used for the replacement transaction when possible')
  
      def get_change_address(tx):
          tx_details = rbf_node.getrawtransaction(tx, 1)
          txout_addresses = [txout['scriptPubKey']['addresses'][0] for txout in tx_details["vout"]]
          return [address for address in txout_addresses if rbf_node.getaddressinfo(address)["ischange"]]
  
      # Check that there is only one change output
      rbfid = spend_one_input(rbf_node, dest_address)
      change_addresses = get_change_address(rbfid)
      assert_equal(len(change_addresses), 1)
  
      # Now find that address in each subsequent tx, and no other change
      bumped_total_tx = rbf_node.bumpfee(rbfid, {"fee_rate": ECONOMICAL})
      assert_equal(change_addresses, get_change_address(bumped_total_tx['txid']))
      bumped_rate_tx = rbf_node.bumpfee(bumped_total_tx["txid"])
      assert_equal(change_addresses, get_change_address(bumped_rate_tx['txid']))
      self.clear_mempool()
  
  
  def spend_one_input(node, dest_address, change_size=Decimal("0.00049000")):
      tx_input = dict(
          sequence=BIP125_SEQUENCE_NUMBER, **next(u for u in node.listunspent() if u["amount"] == Decimal("0.00100000")))
      destinations = {dest_address: Decimal("0.00050000")}
      if change_size > 0:
          destinations[node.getrawchangeaddress()] = change_size
      rawtx = node.createrawtransaction([tx_input], destinations)
      signedtx = node.signrawtransactionwithwallet(rawtx)
      txid = node.sendrawtransaction(signedtx["hex"])
      return txid
  
  
  def submit_block_with_tx(node, tx):
      ctx = CTransaction()
      ctx.deserialize(io.BytesIO(hex_str_to_bytes(tx)))
  
      tip = node.getbestblockhash()
      height = node.getblockcount() + 1
      block_time = node.getblockheader(tip)["mediantime"] + 1
      block = create_block(int(tip, 16), create_coinbase(height), block_time)
      block.vtx.append(ctx)
      block.rehash()
      block.hashMerkleRoot = block.calc_merkle_root()
      add_witness_commitment(block)
      block.solve()
      node.submitblock(block.serialize().hex())
      return block
  
  
  def test_no_more_inputs_fails(self, rbf_node, dest_address):
      self.log.info('Test that bumpfee fails when there are no available confirmed outputs')
      # feerate rbf requires confirmed outputs when change output doesn't exist or is insufficient
      rbf_node.generatetoaddress(1, dest_address)
      # spend all funds, no change output
      rbfid = rbf_node.sendtoaddress(rbf_node.getnewaddress(), rbf_node.getbalance(), "", "", True)
      assert_raises_rpc_error(-4, "Unable to create transaction. Insufficient funds", rbf_node.bumpfee, rbfid)
      self.clear_mempool()
  
  
  if __name__ == "__main__":
      BumpFeeTest().main()
  