diff --git a/test/functional/feature_fee_estimation.py b/test/functional/feature_fee_estimation.py index 05ee556ecef..03970415ac8 100755 --- a/test/functional/feature_fee_estimation.py +++ b/test/functional/feature_fee_estimation.py @@ -7,6 +7,7 @@ from copy import deepcopy from decimal import Decimal import os import random +import time from test_framework.messages import ( COIN, @@ -21,6 +22,8 @@ from test_framework.util import ( ) from test_framework.wallet import MiniWallet +MAX_FILE_AGE = 60 +SECONDS_PER_HOUR = 60 * 60 def small_txpuzzle_randfee( wallet, from_node, conflist, unconflist, amount, min_fee, fee_increment, batch_reqs @@ -290,6 +293,95 @@ class EstimateFeeTest(BitcoinTestFramework): est_feerate = node.estimatesmartfee(2)["feerate"] assert_equal(est_feerate, high_feerate_kvb) + def test_old_fee_estimate_file(self): + # Get the initial fee rate while node is running + fee_rate = self.nodes[0].estimatesmartfee(1)["feerate"] + + # Restart node to ensure fee_estimate.dat file is read + self.restart_node(0) + assert_equal(self.nodes[0].estimatesmartfee(1)["feerate"], fee_rate) + + fee_dat = self.nodes[0].chain_path / "fee_estimates.dat" + + # Stop the node and backdate the fee_estimates.dat file more than MAX_FILE_AGE + self.stop_node(0) + last_modified_time = time.time() - (MAX_FILE_AGE + 1) * SECONDS_PER_HOUR + os.utime(fee_dat, (last_modified_time, last_modified_time)) + + # Start node and ensure the fee_estimates.dat file was not read + self.start_node(0) + assert_equal(self.nodes[0].estimatesmartfee(1)["errors"], ["Insufficient data or no feerate found"]) + + + def test_estimate_dat_is_flushed_periodically(self): + fee_dat = self.nodes[0].chain_path / "fee_estimates.dat" + os.remove(fee_dat) if os.path.exists(fee_dat) else None + + # Verify that fee_estimates.dat does not exist + assert_equal(os.path.isfile(fee_dat), False) + + # Verify if the string "Flushed fee estimates to fee_estimates.dat." is present in the debug log file. + # If present, it indicates that fee estimates have been successfully flushed to disk. + with self.nodes[0].assert_debug_log(expected_msgs=["Flushed fee estimates to fee_estimates.dat."], timeout=1): + # Mock the scheduler for an hour to flush fee estimates to fee_estimates.dat + self.nodes[0].mockscheduler(SECONDS_PER_HOUR) + + # Verify that fee estimates were flushed and fee_estimates.dat file is created + assert_equal(os.path.isfile(fee_dat), True) + + # Verify that the estimates remain the same if there are no blocks in the flush interval + block_hash_before = self.nodes[0].getbestblockhash() + fee_dat_initial_content = open(fee_dat, "rb").read() + with self.nodes[0].assert_debug_log(expected_msgs=["Flushed fee estimates to fee_estimates.dat."], timeout=1): + # Mock the scheduler for an hour to flush fee estimates to fee_estimates.dat + self.nodes[0].mockscheduler(SECONDS_PER_HOUR) + + # Verify that there were no blocks in between the flush interval + assert_equal(block_hash_before, self.nodes[0].getbestblockhash()) + + fee_dat_current_content = open(fee_dat, "rb").read() + assert_equal(fee_dat_current_content, fee_dat_initial_content) + + # Verify that the estimates remain the same after shutdown with no blocks before shutdown + self.restart_node(0) + fee_dat_current_content = open(fee_dat, "rb").read() + assert_equal(fee_dat_current_content, fee_dat_initial_content) + + # Verify that the estimates are not the same if new blocks were produced in the flush interval + with self.nodes[0].assert_debug_log(expected_msgs=["Flushed fee estimates to fee_estimates.dat."], timeout=1): + # Mock the scheduler for an hour to flush fee estimates to fee_estimates.dat + self.generate(self.nodes[0], 5, sync_fun=self.no_op) + self.nodes[0].mockscheduler(SECONDS_PER_HOUR) + + fee_dat_current_content = open(fee_dat, "rb").read() + assert fee_dat_current_content != fee_dat_initial_content + + fee_dat_initial_content = fee_dat_current_content + + # Generate blocks before shutdown and verify that the fee estimates are not the same + self.generate(self.nodes[0], 5, sync_fun=self.no_op) + self.restart_node(0) + fee_dat_current_content = open(fee_dat, "rb").read() + assert fee_dat_current_content != fee_dat_initial_content + + + def test_acceptstalefeeestimates_option(self): + # Get the initial fee rate while node is running + fee_rate = self.nodes[0].estimatesmartfee(1)["feerate"] + + self.stop_node(0) + + fee_dat = self.nodes[0].chain_path / "fee_estimates.dat" + + # Stop the node and backdate the fee_estimates.dat file more than MAX_FILE_AGE + last_modified_time = time.time() - (MAX_FILE_AGE + 1) * SECONDS_PER_HOUR + os.utime(fee_dat, (last_modified_time, last_modified_time)) + + # Restart node with -acceptstalefeeestimates option to ensure fee_estimate.dat file is read + self.start_node(0,extra_args=["-acceptstalefeeestimates"]) + assert_equal(self.nodes[0].estimatesmartfee(1)["feerate"], fee_rate) + + def run_test(self): self.log.info("This test is time consuming, please be patient") self.log.info("Splitting inputs so we can generate tx's") @@ -312,12 +404,21 @@ class EstimateFeeTest(BitcoinTestFramework): self.log.info("Testing estimates with single transactions.") self.sanity_check_estimates_range() + self.log.info("Test fee_estimates.dat is flushed periodically") + self.test_estimate_dat_is_flushed_periodically() + # check that the effective feerate is greater than or equal to the mempoolminfee even for high mempoolminfee self.log.info( "Test fee rate estimation after restarting node with high MempoolMinFee" ) self.test_feerate_mempoolminfee() + self.log.info("Test acceptstalefeeestimates option") + self.test_acceptstalefeeestimates_option() + + self.log.info("Test reading old fee_estimates.dat") + self.test_old_fee_estimate_file() + self.log.info("Restarting node with fresh estimation") self.stop_node(0) fee_dat = os.path.join(self.nodes[0].datadir, self.chain, "fee_estimates.dat")