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test: use tagged ephemeral MiniWallet instance in fill_mempool

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This commit is contained in:
Sebastian Falbesoner
2024-04-16 02:30:51 +02:00
parent b2037ad4ae
commit dd8fa86193
6 changed files with 19 additions and 17 deletions
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20
test/functional/test_framework/mempool_util.py
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@@ -14,9 +14,12 @@ from .util import (
create_lots_of_big_transactions,
gen_return_txouts,
)
from .wallet import (
MiniWallet,
)
def fill_mempool(test_framework, node, miniwallet):
def fill_mempool(test_framework, node):
"""Fill mempool until eviction.
Allows for simpler testing of scenarios with floating mempoolminfee > minrelay
@@ -25,8 +28,8 @@ 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.
To avoid unintentional tx dependencies, the mempool filling txs are created with a
tagged ephemeral miniwallet instance.
"""
test_framework.log.info("Fill the mempool until eviction is triggered and the mempoolminfee rises")
txouts = gen_return_txouts()
@@ -39,19 +42,20 @@ def fill_mempool(test_framework, node, miniwallet):
# 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))
ephemeral_miniwallet = MiniWallet(node, tag_name="fill_mempool_ephemeral_wallet")
test_framework.generate(ephemeral_miniwallet, 1 + num_of_batches * tx_batch_size)
# Mine enough blocks so that the UTXOs are allowed to be spent
test_framework.generate(node, COINBASE_MATURITY - 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)]
confirmed_utxos = [ephemeral_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, utxo_to_spend=confirmed_utxos[0], fee_rate=relayfee)["txid"]
del confirmed_utxos[0]
tx_to_be_evicted_id = ephemeral_miniwallet.send_self_transfer(
from_node=node, utxo_to_spend=confirmed_utxos.pop(0), 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)
@@ -63,7 +67,7 @@ def fill_mempool(test_framework, node, miniwallet):
for batch_of_txid in range(num_of_batches):
fee = (batch_of_txid + 1) * base_fee
utxos = confirmed_utxos[:tx_batch_size]
create_lots_of_big_transactions(miniwallet, node, fee, tx_batch_size, txouts, utxos)
create_lots_of_big_transactions(ephemeral_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")