diff --git a/src/rpc/mining.cpp b/src/rpc/mining.cpp index eb2d5b9c5f0..066a60b71b6 100644 --- a/src/rpc/mining.cpp +++ b/src/rpc/mining.cpp @@ -1103,6 +1103,8 @@ static RPCHelpMan estimatesmartfee() RPCTypeCheckArgument(request.params[0], UniValue::VNUM); CBlockPolicyEstimator& fee_estimator = EnsureAnyFeeEstimator(request.context); + const NodeContext& node = EnsureAnyNodeContext(request.context); + const CTxMemPool& mempool = EnsureMemPool(node); unsigned int max_target = fee_estimator.HighestTargetTracked(FeeEstimateHorizon::LONG_HALFLIFE); unsigned int conf_target = ParseConfirmTarget(request.params[0], max_target); @@ -1118,7 +1120,10 @@ static RPCHelpMan estimatesmartfee() UniValue result(UniValue::VOBJ); UniValue errors(UniValue::VARR); FeeCalculation feeCalc; - CFeeRate feeRate = fee_estimator.estimateSmartFee(conf_target, &feeCalc, conservative); + CFeeRate feeRate{fee_estimator.estimateSmartFee(conf_target, &feeCalc, conservative)}; + CFeeRate min_mempool_feerate{mempool.GetMinFee(gArgs.GetIntArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000)}; + CFeeRate min_relay_feerate{::minRelayTxFee}; + feeRate = std::max({feeRate, min_mempool_feerate, min_relay_feerate}); if (feeRate != CFeeRate(0)) { result.pushKV("feerate", ValueFromAmount(feeRate.GetFeePerK())); } else { diff --git a/test/functional/feature_fee_estimation.py b/test/functional/feature_fee_estimation.py index c4610f98bd7..9c225dc6877 100755 --- a/test/functional/feature_fee_estimation.py +++ b/test/functional/feature_fee_estimation.py @@ -132,9 +132,13 @@ def check_smart_estimates(node, fees_seen): delta = 1.0e-6 # account for rounding error last_feerate = float(max(fees_seen)) all_smart_estimates = [node.estimatesmartfee(i) for i in range(1, 26)] + mempoolMinFee = node.getmempoolinfo()['mempoolminfee'] + minRelaytxFee = node.getmempoolinfo()['minrelaytxfee'] for i, e in enumerate(all_smart_estimates): # estimate is for i+1 feerate = float(e["feerate"]) assert_greater_than(feerate, 0) + assert_greater_than_or_equal(feerate, float(mempoolMinFee)) + assert_greater_than_or_equal(feerate, float(minRelaytxFee)) if feerate + delta < min(fees_seen) or feerate - delta > max(fees_seen): raise AssertionError(f"Estimated fee ({feerate}) out of range ({min(fees_seen)},{max(fees_seen)})") @@ -275,6 +279,12 @@ class EstimateFeeTest(BitcoinTestFramework): self.log.info("Final estimates after emptying mempools") check_estimates(self.nodes[1], self.fees_per_kb) + # 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") + high_val = 3*self.nodes[1].estimatesmartfee(1)['feerate'] + self.restart_node(1, extra_args=[f'-minrelaytxfee={high_val}']) + check_estimates(self.nodes[1], self.fees_per_kb) + self.log.info("Testing that fee estimation is disabled in blocksonly.") self.restart_node(0, ["-blocksonly"]) assert_raises_rpc_error(-32603, "Fee estimation disabled",