diff options
Diffstat (limited to 'test/functional/test_framework/util.py')
-rw-r--r-- | test/functional/test_framework/util.py | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/test/functional/test_framework/util.py b/test/functional/test_framework/util.py index c5b69a3954..dbaf42fdaa 100644 --- a/test/functional/test_framework/util.py +++ b/test/functional/test_framework/util.py @@ -496,6 +496,55 @@ def check_node_connections(*, node, num_in, num_out): assert_equal(info["connections_in"], num_in) assert_equal(info["connections_out"], num_out) +def fill_mempool(test_framework, node, miniwallet): + """Fill mempool until eviction. + + Allows for simpler testing of scenarios with floating mempoolminfee > minrelay + Requires -datacarriersize=100000 and + -maxmempool=5. + It will not ensure mempools become synced as it + is based on a single node and assumes -minrelaytxfee + is 1 sat/vbyte. + """ + test_framework.log.info("Fill the mempool until eviction is triggered and the mempoolminfee rises") + txouts = gen_return_txouts() + relayfee = node.getnetworkinfo()['relayfee'] + + assert_equal(relayfee, Decimal('0.00001000')) + + tx_batch_size = 1 + num_of_batches = 75 + # Generate UTXOs to flood the mempool + # 1 to create a tx initially that will be evicted from the mempool later + # 75 transactions each with a fee rate higher than the previous one + test_framework.generate(miniwallet, 1 + (num_of_batches * tx_batch_size)) + + # Mine COINBASE_MATURITY - 1 blocks so that the UTXOs are allowed to be spent + test_framework.generate(node, 100 - 1) + + test_framework.log.debug("Create a mempool tx that will be evicted") + tx_to_be_evicted_id = miniwallet.send_self_transfer(from_node=node, fee_rate=relayfee)["txid"] + + # Increase the tx fee rate to give the subsequent transactions a higher priority in the mempool + # The tx has an approx. vsize of 65k, i.e. multiplying the previous fee rate (in sats/kvB) + # by 130 should result in a fee that corresponds to 2x of that fee rate + base_fee = relayfee * 130 + + test_framework.log.debug("Fill up the mempool with txs with higher fee rate") + with node.assert_debug_log(["rolling minimum fee bumped"]): + for batch_of_txid in range(num_of_batches): + fee = (batch_of_txid + 1) * base_fee + create_lots_of_big_transactions(miniwallet, node, fee, tx_batch_size, txouts) + + test_framework.log.debug("The tx should be evicted by now") + # The number of transactions created should be greater than the ones present in the mempool + assert_greater_than(tx_batch_size * num_of_batches, len(node.getrawmempool())) + # Initial tx created should not be present in the mempool anymore as it had a lower fee rate + assert tx_to_be_evicted_id not in node.getrawmempool() + + test_framework.log.debug("Check that mempoolminfee is larger than minrelaytxfee") + assert_equal(node.getmempoolinfo()['minrelaytxfee'], Decimal('0.00001000')) + assert_greater_than(node.getmempoolinfo()['mempoolminfee'], Decimal('0.00001000')) # Transaction/Block functions ############################# |