add test cases, move marker, flag to witness

jmbitcoin/jmbitcoin/secp256k1_transaction.py

@@ -168,8 +168,8 @@ def estimate_tx_size(ins, outs):
     wsize = 0
     tx_is_segwit = there_is_one_segwit_input(ins)
     if tx_is_segwit:
-        # flag and marker bytes
+        # flag and marker bytes are included in witness
-        nwsize += 2
+        wsize += 2
 
     for i in ins:
         if i not in inmults:

jmbitcoin/test/test_tx_signing.py

@@ -3,25 +3,46 @@ import pytest
 import hashlib
 from jmbase import bintohex
 import jmbitcoin as btc
+from math import ceil
 
 
-# Cases copied from:
+# Case of spending into a FB, one p2wpkh input, one FB output, one p2wpkh output:
+#
+# "020000000001019b3a5c6ec9712bd6b1aa1e07ed12a677eb21215430fb84a689664fb0d4fa175a0000000000feffffff0290099c0a000000001600144d32ca4673822334531a2941bb85bff075c384d180b14f0100000000220020dae515a98f31542dd6b21bb0b0e31fccc4ebcdc9ba3e225798bc981ccbb8a21d024830450221009bc5fb8d077b32304c02a886926a68110bc7c5195a92b55977bd4affd23ab2d50220774e88828cf80cba4bb2e277a69a7c693c3566b5b72a0c0cf25cba89df0646d30121036d1baed4008f0d7f03ac41bbdbe46e02eeef6f040f7bdbc41adac30c2cf8831886020000"
+#
+# case of spending from a FB, single input, to 2 p2wpkh outputs
+# "020000000001013499e10a8035a3cb928f5a894b2a3feed7d46ab579f0a2211a17ed1df0e2d9660100000000feffffff02405dc6000000000016001486551870825ef64d7fda89cc2a6fda497ab71a02954d8900000000001600147c24b9a3ddf5eb26142fb3f05a3746a0a582f81a0247304402206ca2049154939b083a5eb22713d3cb78f6673f43828fa4a7ef0f03275584da6c0220770fe7d50ba5e0a5f8039f28c5deaaf1e8b2030008bf51cc8721cf088eab5586012a0480c22e61b175210376e5964ee2c328e85b88a50f02953b1cddb1490825140331a3948023cc19946bac81c22e61"
+#
+# case of spending from an FB plus one more p2wpkh input, spending to a p2sh output and a p2wpkh output
+# "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"
+#
+# case of spending from one FB input to one FB output
+#
+# "0200000000010150c8e3786d357cbe61d8e27de7439e1b32d75d0a0ad596c5ff2863134cbd3ead0100000000feffffff01db84f701000000002200208b8ed0bc565e419dd956c3841b7bb25f7c197e2699002bac58a68f47206e1f340247304402202a639209aa9a2883ad75210edce2165260167435f56cede83e8c74095944f355022050fde591f1fefb615a072a797ace3c332c678e0f9161e58d79efa1705f9ab17c012a04002e7f61b1752103d4d747d0dca80c129c017ec1cdc658945013e04ff3d6946f15ccc9df52c323f0ac012e7f61"
+#
+# Virtual sizes can be calculated from bitcointx.core.CTransaction.deserialize(unhexlify(txhex)).get_virtual_size()
+#
+# More cases copied from:
 # https://github.com/kristapsk/bitcoin-scripts/blob/0b847bec016638e60313ecec2b81f2e8accd311b/tests/tx-vsize.bats
 @pytest.mark.parametrize(
     "inaddrtypes, outaddrtypes, size_expected",
-    [(["p2pkh"], ["p2pkh"], 192),
+    [(["p2wpkh"], ["p2wsh", "p2wpkh"], 153),
+     (["p2wsh"], ["p2wpkh", "p2wpkh"], 143),
+     (["p2wsh", "p2wpkh"], ["p2sh-p2wpkh", "p2wpkh"], 212),
+     (["p2wsh"], ["p2wsh"], 124),
+     (["p2pkh"], ["p2pkh"], 192),
      (["p2pkh"], ["p2pkh", "p2pkh"], 226),
      (["p2pkh"], ["p2sh-p2wpkh", "p2sh-p2wpkh"], 222),
      (["p2pkh"], ["p2pkh", "p2sh-p2wpkh"], 224),
-     (["p2sh-p2wpkh"], ["p2sh-p2wpkh"], 135),
+     (["p2sh-p2wpkh"], ["p2sh-p2wpkh"], 134),
-     (["p2wpkh"], ["p2wpkh"], 111),
+     (["p2wpkh"], ["p2wpkh"], 110),
      ])
 def test_tx_size_estimate(inaddrtypes, outaddrtypes, size_expected):
     # non-sw only inputs result in a single integer return,
     # segwit inputs return (witness size, non-witness size)
     x = btc.estimate_tx_size(inaddrtypes, outaddrtypes)
     if btc.there_is_one_segwit_input(inaddrtypes):
-        s = int(x[0]/4 + x[1])
+        s = ceil((x[0] + x[1] * 4)/4.0)
     else:
         s = x
     assert s == size_expected

jmclient/jmclient/wallet.py

@@ -8,6 +8,7 @@ import random
 import copy
 import base64
 import json
+from math import ceil
 from binascii import hexlify, unhexlify
 from datetime import datetime, timedelta
 from calendar import timegm
@@ -113,8 +114,7 @@ def estimate_tx_fee(ins, outs, txtype='p2pkh', outtype=None, extra_bytes=0):
         witness_estimate, non_witness_estimate = btc.estimate_tx_size(
             ins, outs)
         non_witness_estimate += extra_bytes
-        return int(int((
+        return int(int(ceil(non_witness_estimate + 0.25*witness_estimate)*fee_per_kb)/Decimal(1000.0))
-            non_witness_estimate + 0.25*witness_estimate)*fee_per_kb)/Decimal(1000.0))
 
 def compute_tx_locktime():
     # set locktime for best anonset (Core, Electrum)

jmclient/test/test_taker.py

@@ -513,15 +513,15 @@ def test_custom_change(setup_taker):
         for out in taker.latest_tx.vout:
             # input utxo is 200M; amount is 20M; as per logs:
             # totalin=200000000
-            # my_txfee=13680 <- this estimate ignores address type
+            # my_txfee=13650 <- this estimate ignores address type
             # makers_txfee=3000
-            # cjfee_total=12000 => changevalue=179974320
+            # cjfee_total=12000 => changevalue=179974350
             # note that there is a small variation in the size of
             # the transaction (a few bytes) for the different scriptPubKey
             # type, but this is currently ignored in coinjoins by the
             # Taker (not true for direct send operations), hence we get
             # the same value for each different output type.
-            if out.scriptPubKey == script and out.nValue == 179974320:
+            if out.scriptPubKey == script and out.nValue == 179974350:
                 # must be only one
                 assert not custom_change_found
                 custom_change_found = True