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fixup: get all utxos up front in fill_mempool, discourage wallet mixing

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Co-authored-by: Sebastian Falbesoner <sebastian.falbesoner@gmail.com>
This commit is contained in:
glozow
2024-04-15 10:00:53 +01:00
committed by Sebastian Falbesoner
parent bdb33ec519
commit e9dc511a7e
2 changed files with 19 additions and 3 deletions
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14
test/functional/test_framework/util.py
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@ -505,6 +505,8 @@ def fill_mempool(test_framework, node, miniwallet):
It will not ensure mempools become synced as it
is based on a single node and assumes -minrelaytxfee
is 1 sat/vbyte.
To avoid unintentional tx dependencies, it is recommended to use separate miniwallets for
mempool filling vs transactions in tests.
"""
test_framework.log.info("Fill the mempool until eviction is triggered and the mempoolminfee rises")
txouts = gen_return_txouts()
@ -522,8 +524,14 @@ def fill_mempool(test_framework, node, miniwallet):
# Mine COINBASE_MATURITY - 1 blocks so that the UTXOs are allowed to be spent
test_framework.generate(node, 100 - 1)
# Get all UTXOs up front to ensure none of the transactions spend from each other, as that may
# change their effective feerate and thus the order in which they are selected for eviction.
confirmed_utxos = [miniwallet.get_utxo(confirmed_only=True) for _ in range(num_of_batches * tx_batch_size + 1)]
assert_equal(len(confirmed_utxos), num_of_batches * tx_batch_size + 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"]
tx_to_be_evicted_id = miniwallet.send_self_transfer(from_node=node, utxo_to_spend=confirmed_utxos[0], fee_rate=relayfee)["txid"]
del confirmed_utxos[0]
# 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)
@ -534,7 +542,9 @@ def fill_mempool(test_framework, node, miniwallet):
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)
utxos = confirmed_utxos[:tx_batch_size]
create_lots_of_big_transactions(miniwallet, node, fee, tx_batch_size, txouts, utxos)
del confirmed_utxos[:tx_batch_size]
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