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update estimatesmartfee rpc to return max of estimateSmartFee, mempoolMinFee and minRelayTxFee.

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This will provide better estimates which would be closer to fee paid in actual
transactions.
The test has also been changed such that when the node is restarted with a
high mempoolMinFee, the estimatesmartfee still returns a feeRate greater
than or equal to the mempoolMinFee, minRelayTxFee.(just like the feeRate of actual transactions)
This commit is contained in:
pranabp-bit
2021-08-14 08:22:43 +05:30
parent dccf3d25f9
commit ea31caf6b4
2 changed files with 16 additions and 1 deletions
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7
src/rpc/mining.cpp
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@@ -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 {