[qa] pruning: Use cached utxo set to run faster

1 files changed, 9 insertions, 5 deletions

diff --git a/qa/rpc-tests/test_framework/util.py b/qa/rpc-tests/test_framework/util.py
index 1d6c9aa230..85898d9f32 100644
--- a/qa/rpc-tests/test_framework/util.py
+++ b/qa/rpc-tests/test_framework/util.py
@@ -654,10 +654,10 @@ def create_tx(node, coinbase, to_address, amount):
 
 # Create a spend of each passed-in utxo, splicing in "txouts" to each raw
 # transaction to make it large.  See gen_return_txouts() above.
-def create_lots_of_big_transactions(node, txouts, utxos, fee):
+def create_lots_of_big_transactions(node, txouts, utxos, num, fee):
     addr = node.getnewaddress()
     txids = []
-    for _ in range(len(utxos)):
+    for _ in range(num):
         t = utxos.pop()
         inputs=[{ "txid" : t["txid"], "vout" : t["vout"]}]
         outputs = {}
@@ -672,13 +672,17 @@ def create_lots_of_big_transactions(node, txouts, utxos, fee):
         txids.append(txid)
     return txids
 
-def mine_large_block(node):
+def mine_large_block(node, utxos=None):
     # generate a 66k transaction,
     # and 14 of them is close to the 1MB block limit
+    num = 14
     txouts = gen_return_txouts()
-    utxos = node.listunspent()[:14]
+    utxos = utxos if utxos is not None else []
+    if len(utxos) < num:
+        utxos.clear()
+        utxos.extend(node.listunspent())
     fee = 100 * node.getnetworkinfo()["relayfee"]
-    create_lots_of_big_transactions(node, txouts, utxos, fee=fee)
+    create_lots_of_big_transactions(node, txouts, utxos, num, fee=fee)
     node.generate(1)
 
 def get_bip9_status(node, key):