Merge bitcoin/bitcoin#23210: test: Replace satoshi_round with int() or Decimal()

fa2ac58 test: Replace satoshi_round with int() or Decimal() (MarcoFalke)

Pull request description:

  satoshi_round will round down. To make the code easier to parse use
  Decimal() where possible, which does not round. Or use int(), which
  explicitly rounds down.

ACKs for top commit:
  lsilva01:
    Tested ACK bitcoin/bitcoin@fa2ac58 on Ubuntu 20.04.

Tree-SHA512: 17795d906aa7652933d43e510e993cdd9cf8926da1febf1c42d463048cb38c92dc518ec08736efe29c0189ffd532b108bc7a715f32b4c2ee58b215df65352eb9

Author: MarcoFalke

test/functional/feature_bip68_sequence.py

@@ -24,7 +24,6 @@
     assert_equal,
     assert_greater_than,
     assert_raises_rpc_error,
-    satoshi_round,
     softfork_active,
 )
 from test_framework.script_util import DUMMY_P2WPKH_SCRIPT
@@ -94,7 +93,7 @@ def test_disable_flag(self):
         utxo = utxos[0]
 
         tx1 = CTransaction()
-        value = int(satoshi_round(utxo["amount"] - self.relayfee)*COIN)
+        value = int((utxo["amount"] - self.relayfee) * COIN)
 
         # Check that the disable flag disables relative locktime.
         # If sequence locks were used, this would require 1 block for the

test/functional/mempool_packages.py

@@ -14,7 +14,6 @@
     assert_equal,
     assert_raises_rpc_error,
     chain_transaction,
-    satoshi_round,
 )
 
 # default limits
@@ -209,10 +208,10 @@ def run_test(self):
             entry = self.nodes[0].getmempoolentry(x)
             descendant_fees += entry['fee']
             if (x == chain[-1]):
-                assert_equal(entry['modifiedfee'], entry['fee']+satoshi_round(0.00002))
-                assert_equal(entry['fees']['modified'], entry['fee']+satoshi_round(0.00002))
+                assert_equal(entry['modifiedfee'], entry['fee'] + Decimal("0.00002"))
+                assert_equal(entry['fees']['modified'], entry['fee'] + Decimal("0.00002"))
             assert_equal(entry['descendantfees'], descendant_fees * COIN + 2000)
-            assert_equal(entry['fees']['descendant'], descendant_fees+satoshi_round(0.00002))
+            assert_equal(entry['fees']['descendant'], descendant_fees + Decimal("0.00002"))
 
         # Check that node1's mempool is as expected (-> custom ancestor limit)
         mempool0 = self.nodes[0].getrawmempool(False)
@@ -308,7 +307,7 @@ def run_test(self):
         value = utxo[0]['amount']
         vout = utxo[0]['vout']
 
-        send_value = satoshi_round((value - fee)/2)
+        send_value = (value - fee) / 2
         inputs = [ {'txid' : txid, 'vout' : vout} ]
         outputs = {}
         for _ in range(2):

test/functional/test_framework/wallet.py

@@ -33,7 +33,6 @@
 from test_framework.util import (
     assert_equal,
     assert_greater_than_or_equal,
-    satoshi_round,
 )
 
 DEFAULT_FEE = Decimal("0.0001")
@@ -175,13 +174,12 @@ def create_self_transfer(self, *, fee_rate=Decimal("0.003"), from_node, utxo_to_
             vsize = Decimal(96)  # anyone-can-spend
         else:
             vsize = Decimal(168)  # P2PK (73 bytes scriptSig + 35 bytes scriptPubKey + 60 bytes other)
-        send_value = satoshi_round(utxo_to_spend['value'] - fee_rate * (vsize / 1000))
-        fee = utxo_to_spend['value'] - send_value
+        send_value = int(COIN * (utxo_to_spend['value'] - fee_rate * (vsize / 1000)))
         assert send_value > 0
 
         tx = CTransaction()
         tx.vin = [CTxIn(COutPoint(int(utxo_to_spend['txid'], 16), utxo_to_spend['vout']), nSequence=sequence)]
-        tx.vout = [CTxOut(int(send_value * COIN), self._scriptPubKey)]
+        tx.vout = [CTxOut(send_value, self._scriptPubKey)]
         tx.nLockTime = locktime
         if not self._address:
             # raw script
@@ -200,7 +198,7 @@ def create_self_transfer(self, *, fee_rate=Decimal("0.003"), from_node, utxo_to_
         assert_equal(mempool_valid, tx_info['allowed'])
         if mempool_valid:
             assert_equal(tx_info['vsize'], vsize)
-            assert_equal(tx_info['fees']['base'], fee)
+            assert_equal(tx_info['fees']['base'], utxo_to_spend['value'] - Decimal(send_value) / COIN)
         return {'txid': tx_info['txid'], 'wtxid': tx_info['wtxid'], 'hex': tx_hex, 'tx': tx}
 
     def sendrawtransaction(self, *, from_node, tx_hex):