text: import unittest
  import json
  
  from electrum import bitcoin
  from electrum.json_db import StoredDict
  from electrum.lnutil import (RevocationStore, get_per_commitment_secret_from_seed, make_offered_htlc,
                               make_received_htlc, make_commitment, make_htlc_tx_witness, make_htlc_tx_output,
                               make_htlc_tx_inputs, secret_to_pubkey, derive_blinded_pubkey, derive_privkey,
                               derive_pubkey, make_htlc_tx, extract_ctn_from_tx, UnableToDeriveSecret,
                               get_compressed_pubkey_from_bech32, split_host_port, ConnStringFormatError,
                               ScriptHtlc, extract_nodeid, calc_fees_for_commitment_tx, UpdateAddHtlc, LnFeatures)
  from electrum.util import bh2u, bfh, MyEncoder
  from electrum.transaction import Transaction, PartialTransaction
  from electrum.lnworker import LNWallet
  
  from . import ElectrumTestCase
  
  
  funding_tx_id = '8984484a580b825b9972d7adb15050b3ab624ccd731946b3eeddb92f4e7ef6be'
  funding_output_index = 0
  funding_amount_satoshi = 10000000
  commitment_number = 42
  local_delay = 144
  local_dust_limit_satoshi = 546
  
  local_payment_basepoint = bytes.fromhex('034f355bdcb7cc0af728ef3cceb9615d90684bb5b2ca5f859ab0f0b704075871aa')
  remote_payment_basepoint = bytes.fromhex('032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991')
  # obs = get_obscured_ctn(42, local_payment_basepoint, remote_payment_basepoint)
  local_funding_privkey = bytes.fromhex('30ff4956bbdd3222d44cc5e8a1261dab1e07957bdac5ae88fe3261ef321f374901')
  local_funding_pubkey = bytes.fromhex('023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb')
  remote_funding_pubkey = bytes.fromhex('030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c1')
  local_privkey = bytes.fromhex('bb13b121cdc357cd2e608b0aea294afca36e2b34cf958e2e6451a2f27469449101')
  localpubkey = bytes.fromhex('030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e7')
  remotepubkey = bytes.fromhex('0394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b')
  local_delayedpubkey = bytes.fromhex('03fd5960528dc152014952efdb702a88f71e3c1653b2314431701ec77e57fde83c')
  local_revocation_pubkey = bytes.fromhex('0212a140cd0c6539d07cd08dfe09984dec3251ea808b892efeac3ede9402bf2b19')
  # funding wscript = 5221023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb21030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c152ae
  
  
  class TestLNUtil(ElectrumTestCase):
      def test_shachain_store(self):
          tests = [
              {
                  "name": "insert_secret correct sequence",
                  "inserts": [
                      {
                          "index": 281474976710655,
                          "secret": "7cc854b54e3e0dcdb010d7a3fee464a9687b" +\
                              "e6e8db3be6854c475621e007a5dc",
                          "successful": True
                      },
                      {
                          "index": 281474976710654,
                          "secret": "c7518c8ae4660ed02894df8976fa1a3659c1" +\
                              "a8b4b5bec0c4b872abeba4cb8964",
                          "successful": True
                      },
                      {
                          "index": 281474976710653,
                          "secret": "2273e227a5b7449b6e70f1fb4652864038b1" +\
                              "cbf9cd7c043a7d6456b7fc275ad8",
                          "successful": True
                      },
                      {
                          "index": 281474976710652,
                          "secret": "27cddaa5624534cb6cb9d7da077cf2b22ab2" +\
                              "1e9b506fd4998a51d54502e99116",
                          "successful": True
                      },
                      {
                          "index": 281474976710651,
                          "secret": "c65716add7aa98ba7acb236352d665cab173" +\
                              "45fe45b55fb879ff80e6bd0c41dd",
                          "successful": True
                      },
                      {
                          "index": 281474976710650,
                          "secret": "969660042a28f32d9be17344e09374b37996" +\
                              "2d03db1574df5a8a5a47e19ce3f2",
                          "successful": True
                      },
                      {
                          "index": 281474976710649,
                          "secret": "a5a64476122ca0925fb344bdc1854c1c0a59" +\
                              "fc614298e50a33e331980a220f32",
                          "successful": True
                      },
                      {
                          "index": 281474976710648,
                          "secret": "05cde6323d949933f7f7b78776bcc1ea6d9b" +\
                              "31447732e3802e1f7ac44b650e17",
                          "successful": True
                      }
                  ]
              },
              {
                  "name": "insert_secret #1 incorrect",
                  "inserts": [
                      {
                          "index": 281474976710655,
                          "secret": "02a40c85b6f28da08dfdbe0926c53fab2d" +\
                              "e6d28c10301f8f7c4073d5e42e3148",
                          "successful": True
                      },
                      {
                          "index": 281474976710654,
                          "secret": "c7518c8ae4660ed02894df8976fa1a3659" +\
                              "c1a8b4b5bec0c4b872abeba4cb8964",
                          "successful": False
                      }
                  ]
              },
              {
                  "name": "insert_secret #2 incorrect (#1 derived from incorrect)",
                  "inserts": [
                      {
                          "index": 281474976710655,
                          "secret": "02a40c85b6f28da08dfdbe0926c53fab2de6" +\
                              "d28c10301f8f7c4073d5e42e3148",
                          "successful": True
                      },
                      {
                          "index": 281474976710654,
                          "secret": "dddc3a8d14fddf2b68fa8c7fbad274827493" +\
                              "7479dd0f8930d5ebb4ab6bd866a3",
                          "successful": True
                      },
                      {
                          "index": 281474976710653,
                          "secret": "2273e227a5b7449b6e70f1fb4652864038b1" +\
                              "cbf9cd7c043a7d6456b7fc275ad8",
                          "successful": True
                      },
                      {
                          "index": 281474976710652,
                          "secret": "27cddaa5624534cb6cb9d7da077cf2b22a" +\
                              "b21e9b506fd4998a51d54502e99116",
                          "successful": False
                      }
                  ]
              },
              {
                  "name": "insert_secret #3 incorrect",
                  "inserts": [
                      {
                          "index": 281474976710655,
                          "secret": "7cc854b54e3e0dcdb010d7a3fee464a9687b" +\
                              "e6e8db3be6854c475621e007a5dc",
                          "successful": True
                      },
                      {
                          "index": 281474976710654,
                          "secret": "c7518c8ae4660ed02894df8976fa1a3659c1" +\
                              "a8b4b5bec0c4b872abeba4cb8964",
                          "successful": True
                      },
                      {
                          "index": 281474976710653,
                          "secret": "c51a18b13e8527e579ec56365482c62f180b" +\
                              "7d5760b46e9477dae59e87ed423a",
                          "successful": True
                      },
                      {
                          "index": 281474976710652,
                          "secret": "27cddaa5624534cb6cb9d7da077cf2b22ab2" +\
                              "1e9b506fd4998a51d54502e99116",
                          "successful": False
                      }
                  ]
              },
              {
                  "name": "insert_secret #4 incorrect (1,2,3 derived from incorrect)",
                  "inserts": [
                      {
                          "index": 281474976710655,
                          "secret": "02a40c85b6f28da08dfdbe0926c53fab2de6" +\
                              "d28c10301f8f7c4073d5e42e3148",
                          "successful": True
                      },
                      {
                          "index": 281474976710654,
                          "secret": "dddc3a8d14fddf2b68fa8c7fbad274827493" +\
                              "7479dd0f8930d5ebb4ab6bd866a3",
                          "successful": True
                      },
                      {
                          "index": 281474976710653,
                          "secret": "c51a18b13e8527e579ec56365482c62f18" +\
                              "0b7d5760b46e9477dae59e87ed423a",
                          "successful": True
                      },
                      {
                          "index": 281474976710652,
                          "secret": "ba65d7b0ef55a3ba300d4e87af29868f39" +\
                              "4f8f138d78a7011669c79b37b936f4",
                          "successful": True
                      },
                      {
                          "index": 281474976710651,
                          "secret": "c65716add7aa98ba7acb236352d665cab1" +\
                              "7345fe45b55fb879ff80e6bd0c41dd",
                          "successful": True
                      },
                      {
                          "index": 281474976710650,
                          "secret": "969660042a28f32d9be17344e09374b379" +\
                              "962d03db1574df5a8a5a47e19ce3f2",
                          "successful": True
                      },
                      {
                          "index": 281474976710649,
                          "secret": "a5a64476122ca0925fb344bdc1854c1c0a" +\
                              "59fc614298e50a33e331980a220f32",
                          "successful": True
                      },
                      {
                          "index": 281474976710649,
                          "secret": "05cde6323d949933f7f7b78776bcc1ea6d9b" +\
                              "31447732e3802e1f7ac44b650e17",
                          "successful": False
                      }
                  ]
              },
              {
                  "name": "insert_secret #5 incorrect",
                  "inserts": [
                      {
                          "index": 281474976710655,
                          "secret": "7cc854b54e3e0dcdb010d7a3fee464a9687b" +\
                              "e6e8db3be6854c475621e007a5dc",
                          "successful": True
                      },
                      {
                          "index": 281474976710654,
                          "secret": "c7518c8ae4660ed02894df8976fa1a3659c1a" +\
                              "8b4b5bec0c4b872abeba4cb8964",
                          "successful": True
                      },
                      {
                          "index": 281474976710653,
                          "secret": "2273e227a5b7449b6e70f1fb4652864038b1" +\
                              "cbf9cd7c043a7d6456b7fc275ad8",
                          "successful": True
                      },
                      {
                          "index": 281474976710652,
                          "secret": "27cddaa5624534cb6cb9d7da077cf2b22ab21" +\
                              "e9b506fd4998a51d54502e99116",
                          "successful": True
                      },
                      {
                          "index": 281474976710651,
                          "secret": "631373ad5f9ef654bb3dade742d09504c567" +\
                              "edd24320d2fcd68e3cc47e2ff6a6",
                          "successful": True
                      },
                      {
                          "index": 281474976710650,
                          "secret": "969660042a28f32d9be17344e09374b37996" +\
                              "2d03db1574df5a8a5a47e19ce3f2",
                          "successful": False
                      }
                  ]
              },
              {
                  "name": "insert_secret #6 incorrect (5 derived from incorrect)",
                  "inserts": [
                      {
                          "index": 281474976710655,
                          "secret": "7cc854b54e3e0dcdb010d7a3fee464a9687b" +\
                              "e6e8db3be6854c475621e007a5dc",
                          "successful": True
                      },
                      {
                          "index": 281474976710654,
                          "secret": "c7518c8ae4660ed02894df8976fa1a3659c1a" +\
                              "8b4b5bec0c4b872abeba4cb8964",
                          "successful": True
                      },
                      {
                          "index": 281474976710653,
                          "secret": "2273e227a5b7449b6e70f1fb4652864038b1" +\
                              "cbf9cd7c043a7d6456b7fc275ad8",
                          "successful": True
                      },
                      {
                          "index": 281474976710652,
                          "secret": "27cddaa5624534cb6cb9d7da077cf2b22ab21" +\
                              "e9b506fd4998a51d54502e99116",
                          "successful": True
                      },
                      {
                          "index": 281474976710651,
                          "secret": "631373ad5f9ef654bb3dade742d09504c567" +\
                              "edd24320d2fcd68e3cc47e2ff6a6",
                          "successful": True
                      },
                      {
                          "index": 281474976710650,
                          "secret": "b7e76a83668bde38b373970155c868a65330" +\
                              "4308f9896692f904a23731224bb1",
                          "successful": True
                      },
                      {
                          "index": 281474976710649,
                          "secret": "a5a64476122ca0925fb344bdc1854c1c0a59f" +\
                              "c614298e50a33e331980a220f32",
                          "successful": True
                      },
                      {
                          "index": 281474976710648,
                          "secret": "05cde6323d949933f7f7b78776bcc1ea6d9b" +\
                              "31447732e3802e1f7ac44b650e17",
                          "successful": False
                      }
                  ]
              },
              {
                  "name": "insert_secret #7 incorrect",
                  "inserts": [
                      {
                          "index": 281474976710655,
                          "secret": "7cc854b54e3e0dcdb010d7a3fee464a9687b" +\
                              "e6e8db3be6854c475621e007a5dc",
                          "successful": True
                      },
                      {
                          "index": 281474976710654,
                          "secret": "c7518c8ae4660ed02894df8976fa1a3659c1a" +\
                              "8b4b5bec0c4b872abeba4cb8964",
                          "successful": True
                      },
                      {
                          "index": 281474976710653,
                          "secret": "2273e227a5b7449b6e70f1fb4652864038b1" +\
                              "cbf9cd7c043a7d6456b7fc275ad8",
                          "successful": True
                      },
                      {
                          "index": 281474976710652,
                          "secret": "27cddaa5624534cb6cb9d7da077cf2b22ab21" +\
                              "e9b506fd4998a51d54502e99116",
                          "successful": True
                      },
                      {
                          "index": 281474976710651,
                          "secret": "c65716add7aa98ba7acb236352d665cab173" +\
                              "45fe45b55fb879ff80e6bd0c41dd",
                          "successful": True
                      },
                      {
                          "index": 281474976710650,
                          "secret": "969660042a28f32d9be17344e09374b37996" +\
                              "2d03db1574df5a8a5a47e19ce3f2",
                          "successful": True
                      },
                      {
                          "index": 281474976710649,
                          "secret": "e7971de736e01da8ed58b94c2fc216cb1d" +\
                              "ca9e326f3a96e7194fe8ea8af6c0a3",
                          "successful": True
                      },
                      {
                          "index": 281474976710648,
                          "secret": "05cde6323d949933f7f7b78776bcc1ea6d" +\
                              "9b31447732e3802e1f7ac44b650e17",
                          "successful": False
                      }
                  ]
              },
              {
                  "name": "insert_secret #8 incorrect",
                  "inserts": [
                      {
                          "index": 281474976710655,
                          "secret": "7cc854b54e3e0dcdb010d7a3fee464a9687b" +\
                              "e6e8db3be6854c475621e007a5dc",
                          "successful": True
                      },
                      {
                          "index": 281474976710654,
                          "secret": "c7518c8ae4660ed02894df8976fa1a3659c1a" +\
                              "8b4b5bec0c4b872abeba4cb8964",
                          "successful": True
                      },
                      {
                          "index": 281474976710653,
                          "secret": "2273e227a5b7449b6e70f1fb4652864038b1" +\
                              "cbf9cd7c043a7d6456b7fc275ad8",
                          "successful": True
                      },
                      {
                          "index": 281474976710652,
                          "secret": "27cddaa5624534cb6cb9d7da077cf2b22ab21" +\
                              "e9b506fd4998a51d54502e99116",
                          "successful": True
                      },
                      {
                          "index": 281474976710651,
                          "secret": "c65716add7aa98ba7acb236352d665cab173" +\
                              "45fe45b55fb879ff80e6bd0c41dd",
                          "successful": True
                      },
                      {
                          "index": 281474976710650,
                          "secret": "969660042a28f32d9be17344e09374b37996" +\
                              "2d03db1574df5a8a5a47e19ce3f2",
                          "successful": True
                      },
                      {
                          "index": 281474976710649,
                          "secret": "a5a64476122ca0925fb344bdc1854c1c0a" +\
                              "59fc614298e50a33e331980a220f32",
                          "successful": True
                      },
                      {
                          "index": 281474976710648,
                          "secret": "a7efbc61aac46d34f77778bac22c8a20c6" +\
                              "a46ca460addc49009bda875ec88fa4",
                          "successful": False
                      }
                  ]
              }
          ]
  
          for test in tests:
              receiver = RevocationStore(StoredDict({}, None, []))
              for insert in test["inserts"]:
                  secret = bytes.fromhex(insert["secret"])
  
                  try:
                      receiver.add_next_entry(secret)
                  except Exception as e:
                      if insert["successful"]:
                          raise Exception("Failed ({}): error was received but it shouldn't: {}".format(test["name"], e))
                  else:
                      if not insert["successful"]:
                          raise Exception("Failed ({}): error wasn't received".format(test["name"]))
  
              for insert in test["inserts"]:
                  secret = bytes.fromhex(insert["secret"])
                  index = insert["index"]
                  if insert["successful"]:
                      self.assertEqual(secret, receiver.retrieve_secret(index))
  
              print("Passed ({})".format(test["name"]))
  
      def test_shachain_produce_consume(self):
          seed = bitcoin.sha256(b"shachaintest")
          consumer = RevocationStore(StoredDict({}, None, []))
          for i in range(10000):
              secret = get_per_commitment_secret_from_seed(seed, RevocationStore.START_INDEX - i)
              try:
                  consumer.add_next_entry(secret)
              except Exception as e:
                  raise Exception("iteration " + str(i) + ": " + str(e))
              if i % 1000 == 0:
                  c1 = consumer
                  s1 = json.dumps(c1.storage, cls=MyEncoder)
                  c2 = RevocationStore(StoredDict(json.loads(s1), None, []))
                  s2 = json.dumps(c2.storage, cls=MyEncoder)
                  self.assertEqual(s1, s2)
  
      def test_commitment_tx_with_all_five_HTLCs_untrimmed_minimum_feerate(self):
          to_local_msat = 6988000000
          to_remote_msat = 3000000000
          local_feerate_per_kw = 0
          # base commitment transaction fee = 0
          # actual commitment transaction fee = 0
  
          per_commitment_secret = 0x1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100
          per_commitment_point = secret_to_pubkey(per_commitment_secret)
  
          remote_htlcpubkey = remotepubkey
          local_htlcpubkey = localpubkey
  
          htlc_cltv_timeout = {}
          htlc_payment_preimage = {}
          htlc = {}
  
          htlc_cltv_timeout[2] = 502
          htlc_payment_preimage[2] = b"\x02" * 32
          htlc[2] = make_offered_htlc(local_revocation_pubkey, remote_htlcpubkey, local_htlcpubkey, bitcoin.sha256(htlc_payment_preimage[2]))
  
          htlc_cltv_timeout[3] = 503
          htlc_payment_preimage[3] = b"\x03" * 32
          htlc[3] = make_offered_htlc(local_revocation_pubkey, remote_htlcpubkey, local_htlcpubkey, bitcoin.sha256(htlc_payment_preimage[3]))
  
          htlc_cltv_timeout[0] = 500
          htlc_payment_preimage[0] = b"\x00" * 32
          htlc[0] = make_received_htlc(local_revocation_pubkey, remote_htlcpubkey, local_htlcpubkey, bitcoin.sha256(htlc_payment_preimage[0]), htlc_cltv_timeout[0])
  
          htlc_cltv_timeout[1] = 501
          htlc_payment_preimage[1] = b"\x01" * 32
          htlc[1] = make_received_htlc(local_revocation_pubkey, remote_htlcpubkey, local_htlcpubkey, bitcoin.sha256(htlc_payment_preimage[1]), htlc_cltv_timeout[1])
  
          htlc_cltv_timeout[4] = 504
          htlc_payment_preimage[4] = b"\x04" * 32
          htlc[4] = make_received_htlc(local_revocation_pubkey, remote_htlcpubkey, local_htlcpubkey, bitcoin.sha256(htlc_payment_preimage[4]), htlc_cltv_timeout[4])
  
          remote_signature = "304402204fd4928835db1ccdfc40f5c78ce9bd65249b16348df81f0c44328dcdefc97d630220194d3869c38bc732dd87d13d2958015e2fc16829e74cd4377f84d215c0b70606"
          output_commit_tx = "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"
  
          htlc_obj = {}
          for num, msat in [(0, 1000 * 1000),
              (2, 2000 * 1000),
              (1, 2000 * 1000),
              (3, 3000 * 1000),
              (4, 4000 * 1000)]:
              htlc_obj[num] = UpdateAddHtlc(amount_msat=msat, payment_hash=bitcoin.sha256(htlc_payment_preimage[num]), cltv_expiry=0, htlc_id=None, timestamp=0)
          htlcs = [ScriptHtlc(htlc[x], htlc_obj[x]) for x in range(5)]
  
          our_commit_tx = make_commitment(
              ctn=commitment_number,
              local_funding_pubkey=local_funding_pubkey,
              remote_funding_pubkey=remote_funding_pubkey,
              remote_payment_pubkey=remotepubkey,
              funder_payment_basepoint=local_payment_basepoint,
              fundee_payment_basepoint=remote_payment_basepoint,
              revocation_pubkey=local_revocation_pubkey,
              delayed_pubkey=local_delayedpubkey,
              to_self_delay=local_delay,
              funding_txid=funding_tx_id,
              funding_pos=funding_output_index,
              funding_sat=funding_amount_satoshi,
              local_amount=to_local_msat,
              remote_amount=to_remote_msat,
              dust_limit_sat=local_dust_limit_satoshi,
              fees_per_participant=calc_fees_for_commitment_tx(num_htlcs=len(htlcs), feerate=local_feerate_per_kw, is_local_initiator=True),
              htlcs=htlcs)
          self.sign_and_insert_remote_sig(our_commit_tx, remote_funding_pubkey, remote_signature, local_funding_pubkey, local_funding_privkey)
          self.assertEqual(str(our_commit_tx), output_commit_tx)
  
          signature_for_output_remote_htlc = {}
          signature_for_output_remote_htlc[0] = "304402206a6e59f18764a5bf8d4fa45eebc591566689441229c918b480fb2af8cc6a4aeb02205248f273be447684b33e3c8d1d85a8e0ca9fa0bae9ae33f0527ada9c162919a6"
          signature_for_output_remote_htlc[2] = "3045022100d5275b3619953cb0c3b5aa577f04bc512380e60fa551762ce3d7a1bb7401cff9022037237ab0dac3fe100cde094e82e2bed9ba0ed1bb40154b48e56aa70f259e608b"
          signature_for_output_remote_htlc[1] = "304402201b63ec807771baf4fdff523c644080de17f1da478989308ad13a58b51db91d360220568939d38c9ce295adba15665fa68f51d967e8ed14a007b751540a80b325f202"
          signature_for_output_remote_htlc[3] = "3045022100daee1808f9861b6c3ecd14f7b707eca02dd6bdfc714ba2f33bc8cdba507bb182022026654bf8863af77d74f51f4e0b62d461a019561bb12acb120d3f7195d148a554"
          signature_for_output_remote_htlc[4] = "304402207e0410e45454b0978a623f36a10626ef17b27d9ad44e2760f98cfa3efb37924f0220220bd8acd43ecaa916a80bd4f919c495a2c58982ce7c8625153f8596692a801d"
  
          output_htlc_tx = {}
          SUCCESS = True
          TIMEOUT = False
          output_htlc_tx[0] = (SUCCESS, "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")
  
          output_htlc_tx[2] = (TIMEOUT, "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")
  
          output_htlc_tx[1] = (SUCCESS, "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")
  
          output_htlc_tx[3] = (TIMEOUT, "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")
  
          output_htlc_tx[4] = (SUCCESS, "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")
  
          htlc_output_index = {0: 0, 1: 2, 2: 1, 3: 3, 4: 4}
  
          for i in range(5):
              self.assertEqual(output_htlc_tx[i][1], self.htlc_tx(htlc[i], htlc_output_index[i],
                  htlcs[i].htlc.amount_msat,
                  htlc_payment_preimage[i],
                  signature_for_output_remote_htlc[i],
                  output_htlc_tx[i][0], htlc_cltv_timeout[i] if not output_htlc_tx[i][0] else 0,
                  local_feerate_per_kw,
                  our_commit_tx))
  
      def htlc_tx(self, htlc, htlc_output_index, amount_msat, htlc_payment_preimage, remote_htlc_sig, success, cltv_timeout, local_feerate_per_kw, our_commit_tx):
          _script, our_htlc_tx_output = make_htlc_tx_output(
              amount_msat=amount_msat,
              local_feerate=local_feerate_per_kw,
              revocationpubkey=local_revocation_pubkey,
              local_delayedpubkey=local_delayedpubkey,
              success=success,
              to_self_delay=local_delay)
          our_htlc_tx_inputs = make_htlc_tx_inputs(
              htlc_output_txid=our_commit_tx.txid(),
              htlc_output_index=htlc_output_index,
              amount_msat=amount_msat,
              witness_script=bh2u(htlc))
          our_htlc_tx = make_htlc_tx(
              cltv_expiry=cltv_timeout,
              inputs=our_htlc_tx_inputs,
              output=our_htlc_tx_output)
  
          local_sig = our_htlc_tx.sign_txin(0, local_privkey[:-1])
  
          our_htlc_tx_witness = make_htlc_tx_witness(
              remotehtlcsig=bfh(remote_htlc_sig) + b"\x01",  # 0x01 is SIGHASH_ALL
              localhtlcsig=bfh(local_sig),
              payment_preimage=htlc_payment_preimage if success else b'',  # will put 00 on witness if timeout
              witness_script=htlc)
          our_htlc_tx._inputs[0].witness = our_htlc_tx_witness
          return str(our_htlc_tx)
  
      def test_commitment_tx_with_one_output(self):
          to_local_msat= 6988000000
          to_remote_msat= 3000000000
          local_feerate_per_kw= 9651181
          remote_signature = "3044022064901950be922e62cbe3f2ab93de2b99f37cff9fc473e73e394b27f88ef0731d02206d1dfa227527b4df44a07599289e207d6fd9cca60c0365682dcd3deaf739567e"
          output_commit_tx= "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"
  
          our_commit_tx = make_commitment(
              ctn=commitment_number,
              local_funding_pubkey=local_funding_pubkey,
              remote_funding_pubkey=remote_funding_pubkey,
              remote_payment_pubkey=remotepubkey,
              funder_payment_basepoint=local_payment_basepoint,
              fundee_payment_basepoint=remote_payment_basepoint,
              revocation_pubkey=local_revocation_pubkey,
              delayed_pubkey=local_delayedpubkey,
              to_self_delay=local_delay,
              funding_txid=funding_tx_id,
              funding_pos=funding_output_index,
              funding_sat=funding_amount_satoshi,
              local_amount=to_local_msat,
              remote_amount=to_remote_msat,
              dust_limit_sat=local_dust_limit_satoshi,
              fees_per_participant=calc_fees_for_commitment_tx(num_htlcs=0, feerate=local_feerate_per_kw, is_local_initiator=True),
              htlcs=[])
          self.sign_and_insert_remote_sig(our_commit_tx, remote_funding_pubkey, remote_signature, local_funding_pubkey, local_funding_privkey)
  
          self.assertEqual(str(our_commit_tx), output_commit_tx)
  
      def test_commitment_tx_with_fee_greater_than_funder_amount(self):
          to_local_msat= 6988000000
          to_remote_msat= 3000000000
          local_feerate_per_kw= 9651936
          remote_signature = "3044022064901950be922e62cbe3f2ab93de2b99f37cff9fc473e73e394b27f88ef0731d02206d1dfa227527b4df44a07599289e207d6fd9cca60c0365682dcd3deaf739567e"
          output_commit_tx= "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"
  
          our_commit_tx = make_commitment(
              ctn=commitment_number,
              local_funding_pubkey=local_funding_pubkey,
              remote_funding_pubkey=remote_funding_pubkey,
              remote_payment_pubkey=remotepubkey,
              funder_payment_basepoint=local_payment_basepoint,
              fundee_payment_basepoint=remote_payment_basepoint,
              revocation_pubkey=local_revocation_pubkey,
              delayed_pubkey=local_delayedpubkey,
              to_self_delay=local_delay,
              funding_txid=funding_tx_id,
              funding_pos=funding_output_index,
              funding_sat=funding_amount_satoshi,
              local_amount=to_local_msat,
              remote_amount=to_remote_msat,
              dust_limit_sat=local_dust_limit_satoshi,
              fees_per_participant=calc_fees_for_commitment_tx(num_htlcs=0, feerate=local_feerate_per_kw, is_local_initiator=True),
              htlcs=[])
          self.sign_and_insert_remote_sig(our_commit_tx, remote_funding_pubkey, remote_signature, local_funding_pubkey, local_funding_privkey)
  
          self.assertEqual(str(our_commit_tx), output_commit_tx)
  
      def test_extract_commitment_number_from_tx(self):
          raw_tx = "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"
          tx = Transaction(raw_tx)
          self.assertEqual(commitment_number, extract_ctn_from_tx(tx, 0, local_payment_basepoint, remote_payment_basepoint))
  
      def test_per_commitment_secret_from_seed(self):
          self.assertEqual(0x02a40c85b6f28da08dfdbe0926c53fab2de6d28c10301f8f7c4073d5e42e3148.to_bytes(byteorder="big", length=32),
                           get_per_commitment_secret_from_seed(0x0000000000000000000000000000000000000000000000000000000000000000.to_bytes(byteorder="big", length=32), 281474976710655))
          self.assertEqual(0x7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc.to_bytes(byteorder="big", length=32),
                           get_per_commitment_secret_from_seed(0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF.to_bytes(byteorder="big", length=32), 281474976710655))
          self.assertEqual(0x56f4008fb007ca9acf0e15b054d5c9fd12ee06cea347914ddbaed70d1c13a528.to_bytes(byteorder="big", length=32),
                           get_per_commitment_secret_from_seed(0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF.to_bytes(byteorder="big", length=32), 0xaaaaaaaaaaa))
          self.assertEqual(0x9015daaeb06dba4ccc05b91b2f73bd54405f2be9f217fbacd3c5ac2e62327d31.to_bytes(byteorder="big", length=32),
                           get_per_commitment_secret_from_seed(0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF.to_bytes(byteorder="big", length=32), 0x555555555555))
          self.assertEqual(0x915c75942a26bb3a433a8ce2cb0427c29ec6c1775cfc78328b57f6ba7bfeaa9c.to_bytes(byteorder="big", length=32),
                           get_per_commitment_secret_from_seed(0x0101010101010101010101010101010101010101010101010101010101010101.to_bytes(byteorder="big", length=32), 1))
  
      def test_key_derivation(self):
          # BOLT3, Appendix E
          base_secret = 0x000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f
          per_commitment_secret = 0x1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100
          revocation_basepoint_secret = 0x000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f
          base_point = secret_to_pubkey(base_secret)
          self.assertEqual(base_point, bfh('036d6caac248af96f6afa7f904f550253a0f3ef3f5aa2fe6838a95b216691468e2'))
          per_commitment_point = secret_to_pubkey(per_commitment_secret)
          self.assertEqual(per_commitment_point, bfh('025f7117a78150fe2ef97db7cfc83bd57b2e2c0d0dd25eaf467a4a1c2a45ce1486'))
          localpubkey = derive_pubkey(base_point, per_commitment_point)
          self.assertEqual(localpubkey, bfh('0235f2dbfaa89b57ec7b055afe29849ef7ddfeb1cefdb9ebdc43f5494984db29e5'))
          localprivkey = derive_privkey(base_secret, per_commitment_point)
          self.assertEqual(localprivkey, 0xcbced912d3b21bf196a766651e436aff192362621ce317704ea2f75d87e7be0f)
          revocation_basepoint = secret_to_pubkey(revocation_basepoint_secret)
          self.assertEqual(revocation_basepoint, bfh('036d6caac248af96f6afa7f904f550253a0f3ef3f5aa2fe6838a95b216691468e2'))
          revocationpubkey = derive_blinded_pubkey(revocation_basepoint, per_commitment_point)
          self.assertEqual(revocationpubkey, bfh('02916e326636d19c33f13e8c0c3a03dd157f332f3e99c317c141dd865eb01f8ff0'))
  
      def test_simple_commitment_tx_with_no_HTLCs(self):
          to_local_msat = 7000000000
          to_remote_msat = 3000000000
          local_feerate_per_kw = 15000
          # base commitment transaction fee = 10860
          # actual commitment transaction fee = 10860
          # to_local amount 6989140 wscript 63210212a140cd0c6539d07cd08dfe09984dec3251ea808b892efeac3ede9402bf2b1967029000b2752103fd5960528dc152014952efdb702a88f71e3c1653b2314431701ec77e57fde83c68ac
          # to_remote amount 3000000 P2WPKH(0394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b)
          remote_signature = "3045022100f51d2e566a70ba740fc5d8c0f07b9b93d2ed741c3c0860c613173de7d39e7968022041376d520e9c0e1ad52248ddf4b22e12be8763007df977253ef45a4ca3bdb7c0"
          # local_signature = 3044022051b75c73198c6deee1a875871c3961832909acd297c6b908d59e3319e5185a46022055c419379c5051a78d00dbbce11b5b664a0c22815fbcc6fcef6b1937c3836939
          our_commit_tx = make_commitment(
              ctn=commitment_number,
              local_funding_pubkey=local_funding_pubkey,
              remote_funding_pubkey=remote_funding_pubkey,
              remote_payment_pubkey=remotepubkey,
              funder_payment_basepoint=local_payment_basepoint,
              fundee_payment_basepoint=remote_payment_basepoint,
              revocation_pubkey=local_revocation_pubkey,
              delayed_pubkey=local_delayedpubkey,
              to_self_delay=local_delay,
              funding_txid=funding_tx_id,
              funding_pos=funding_output_index,
              funding_sat=funding_amount_satoshi,
              local_amount=to_local_msat,
              remote_amount=to_remote_msat,
              dust_limit_sat=local_dust_limit_satoshi,
              fees_per_participant=calc_fees_for_commitment_tx(num_htlcs=0, feerate=local_feerate_per_kw, is_local_initiator=True),
              htlcs=[])
          self.sign_and_insert_remote_sig(our_commit_tx, remote_funding_pubkey, remote_signature, local_funding_pubkey, local_funding_privkey)
          ref_commit_tx_str = '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'
          self.assertEqual(str(our_commit_tx), ref_commit_tx_str)
  
      def sign_and_insert_remote_sig(self, tx: PartialTransaction, remote_pubkey, remote_signature, pubkey, privkey):
          assert type(remote_pubkey) is bytes
          assert len(remote_pubkey) == 33
          assert type(remote_signature) is str
          assert type(pubkey) is bytes
          assert type(privkey) is bytes
          assert len(pubkey) == 33
          assert len(privkey) == 33
          tx.sign({bh2u(pubkey): (privkey[:-1], True)})
          tx.add_signature_to_txin(txin_idx=0, signing_pubkey=remote_pubkey.hex(), sig=remote_signature + "01")
  
      def test_get_compressed_pubkey_from_bech32(self):
          self.assertEqual(b'\x03\x84\xef\x87\xd9d\xa2\xaaa7=\xff\xb8\xfe=t8[}>;\n\x13\xa8e\x8eo:\xf5Mi\xb5H',
                           get_compressed_pubkey_from_bech32('ln1qwzwlp7evj325cfh8hlm3l3awsu9klf78v9p82r93ehn4a2ddx65s66awg5'))
  
      def test_split_host_port(self):
          self.assertEqual(split_host_port("[::1]:8000"), ("::1", "8000"))
          self.assertEqual(split_host_port("[::1]"), ("::1", "9735"))
          self.assertEqual(split_host_port("[2601:602:8800:9a:dc59:a4ff:fede:24a9]:9735"), ("2601:602:8800:9a:dc59:a4ff:fede:24a9", "9735"))
          self.assertEqual(split_host_port("[2601:602:8800::a4ff:fede:24a9]:9735"), ("2601:602:8800::a4ff:fede:24a9", "9735"))
          self.assertEqual(split_host_port("kæn.guru:8000"), ("kæn.guru", "8000"))
          self.assertEqual(split_host_port("kæn.guru"), ("kæn.guru", "9735"))
          self.assertEqual(split_host_port("127.0.0.1:8000"), ("127.0.0.1", "8000"))
          self.assertEqual(split_host_port("127.0.0.1"), ("127.0.0.1", "9735"))
          # accepted by getaddrinfo but not ipaddress.ip_address
          self.assertEqual(split_host_port("127.0.0:8000"), ("127.0.0", "8000"))
          self.assertEqual(split_host_port("127.0.0"), ("127.0.0", "9735"))
          self.assertEqual(split_host_port("electrum.org:8000"), ("electrum.org", "8000"))
          self.assertEqual(split_host_port("electrum.org"), ("electrum.org", "9735"))
  
          with self.assertRaises(ConnStringFormatError):
              split_host_port("electrum.org:8000:")
          with self.assertRaises(ConnStringFormatError):
              split_host_port("electrum.org:")
  
      def test_extract_nodeid(self):
          with self.assertRaises(ConnStringFormatError):
              extract_nodeid("00" * 32 + "@localhost")
          with self.assertRaises(ConnStringFormatError):
              extract_nodeid("00" * 33 + "@")
          self.assertEqual(extract_nodeid("00" * 33 + "@localhost"), (b"\x00" * 33, "localhost"))
  
      def test_ln_features_validate_transitive_dependecies(self):
          features = LnFeatures.OPTION_DATA_LOSS_PROTECT_REQ
          self.assertTrue(features.validate_transitive_dependecies())
          features = LnFeatures.PAYMENT_SECRET_OPT
          self.assertFalse(features.validate_transitive_dependecies())
          features = LnFeatures.PAYMENT_SECRET_REQ
          self.assertFalse(features.validate_transitive_dependecies())
          features = LnFeatures.PAYMENT_SECRET_REQ | LnFeatures.VAR_ONION_REQ
          self.assertTrue(features.validate_transitive_dependecies())
          features = LnFeatures.BASIC_MPP_OPT | LnFeatures.PAYMENT_SECRET_REQ
          self.assertFalse(features.validate_transitive_dependecies())
          features = LnFeatures.BASIC_MPP_OPT | LnFeatures.PAYMENT_SECRET_REQ | LnFeatures.VAR_ONION_OPT
          self.assertTrue(features.validate_transitive_dependecies())
          features = LnFeatures.BASIC_MPP_OPT | LnFeatures.PAYMENT_SECRET_REQ | LnFeatures.VAR_ONION_REQ
          self.assertTrue(features.validate_transitive_dependecies())
  
      def test_ln_features_for_init_message(self):
          features = LnFeatures.OPTION_DATA_LOSS_PROTECT_REQ
          self.assertEqual(features, features.for_init_message())
          features = LnFeatures.PAYMENT_SECRET_OPT
          self.assertEqual(features, features.for_init_message())
          features = LnFeatures.PAYMENT_SECRET_REQ
          self.assertEqual(features, features.for_init_message())
          features = LnFeatures.PAYMENT_SECRET_REQ | LnFeatures.VAR_ONION_REQ
          self.assertEqual(features, features.for_init_message())
          features = LnFeatures.BASIC_MPP_OPT | LnFeatures.PAYMENT_SECRET_REQ
          self.assertEqual(features, features.for_init_message())
          features = LnFeatures.BASIC_MPP_OPT | LnFeatures.PAYMENT_SECRET_REQ | LnFeatures.VAR_ONION_OPT
          self.assertEqual(features, features.for_init_message())
          features = LnFeatures.BASIC_MPP_OPT | LnFeatures.PAYMENT_SECRET_REQ | LnFeatures.VAR_ONION_REQ
          self.assertEqual(features, features.for_init_message())
  
      def test_ln_features_for_invoice(self):
          features = LnFeatures.OPTION_DATA_LOSS_PROTECT_REQ
          self.assertEqual(LnFeatures(0), features.for_invoice())
          features = LnFeatures.PAYMENT_SECRET_OPT
          self.assertEqual(features, features.for_invoice())
          features = LnFeatures.PAYMENT_SECRET_REQ
          self.assertEqual(features, features.for_invoice())
          features = LnFeatures.PAYMENT_SECRET_REQ | LnFeatures.VAR_ONION_REQ
          self.assertEqual(features, features.for_invoice())
          features = LnFeatures.BASIC_MPP_OPT | LnFeatures.PAYMENT_SECRET_REQ | LnFeatures.OPTION_DATA_LOSS_PROTECT_REQ
          self.assertEqual(LnFeatures.BASIC_MPP_OPT | LnFeatures.PAYMENT_SECRET_REQ,
                           features.for_invoice())
          features = LnFeatures.BASIC_MPP_OPT | LnFeatures.PAYMENT_SECRET_REQ | LnFeatures.VAR_ONION_OPT | LnFeatures.OPTION_DATA_LOSS_PROTECT_REQ
          self.assertEqual(LnFeatures.BASIC_MPP_OPT | LnFeatures.PAYMENT_SECRET_REQ | LnFeatures.VAR_ONION_OPT,
                           features.for_invoice())
          features = LnFeatures.BASIC_MPP_OPT | LnFeatures.PAYMENT_SECRET_REQ | LnFeatures.VAR_ONION_REQ
          self.assertEqual(features, features.for_invoice())
  
      def test_lnworker_decode_channel_update_msg(self):
          msg_without_prefix = bytes.fromhex("439b71c8ddeff63004e4ff1f9764a57dcf20232b79d9d669aef0e31c42be8e44208f7d868d0133acb334047f30e9399dece226ccd98e5df5330adf7f356290516fe28c0ab6f1b372c1a6a246ae63f74f931e8365e15a089c68d619000000000008762700054a00005ef2cf9c0101009000000000000003e80000000000000001000000002367b880")
          # good messages
          self.assertNotEqual(
              None,
              LNWallet._decode_channel_update_msg(msg_without_prefix))
          self.assertNotEqual(
              None,
              LNWallet._decode_channel_update_msg(bytes.fromhex("0102") + msg_without_prefix))
          # bad messages
          self.assertEqual(
              None,
              LNWallet._decode_channel_update_msg(bytes.fromhex("0102030405")))
          self.assertEqual(
              None,
              LNWallet._decode_channel_update_msg(bytes.fromhex("ffff") + msg_without_prefix))
          self.assertEqual(
              None,
              LNWallet._decode_channel_update_msg(bytes.fromhex("0101") + msg_without_prefix))
  