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author | MarcoFalke <falke.marco@gmail.com> | 2020-12-07 12:59:31 +0100 |
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committer | MarcoFalke <falke.marco@gmail.com> | 2020-12-07 12:59:48 +0100 |
commit | 03b1db6114958a9f8edf533f5280df4916d33665 (patch) | |
tree | 463500ff180d31903d8265dab06f0033031588f6 /src/rpc | |
parent | 00f4dcd5520e14529b5c3fa8e14feb3a023ffb4c (diff) | |
parent | 4e28753f60613ecd35cdef87bef5f99c302c3fbd (diff) | |
download | bitcoin-03b1db6114958a9f8edf533f5280df4916d33665.tar.xz |
Merge #18766: Disable fee estimation in blocksonly mode (by removing the fee estimates global)
4e28753f60613ecd35cdef87bef5f99c302c3fbd feestimator: encapsulate estimation file logic (Antoine Poinsot)
e8ea6ad9c16997bdc7e22a20eca16e234290b7ff init: don't create a CBlockPolicyEstimator if we don't relay transactions (Antoine Poinsot)
86ff2cf202bfb9d9b50800b8ffe3fead3f77f5fa Remove the remaining fee estimation globals (Antoine Poinsot)
03bfeee957ab7e3b6aece82b9561774648094f54 interface: remove unused estimateSmartFee method from node (Antoine Poinsot)
Pull request description:
If the `blocksonly` mode is turned on after running with transaction
relay enabled for a while, the fee estimation will serve outdated data
to both the internal wallet and to external applications that might be
feerate-sensitive and make use of `estimatesmartfee` (for example a
Lightning Network node).
This has already caused issues (for example https://github.com/bitcoin/bitcoin/issues/16840 (C-lightning), or https://github.com/lightningnetwork/lnd/issues/2562 (LND)) and it seems prudent to fail rather than to give inaccurate values.
This fixes #16840, and closes #16890 which tried to fix the symptoms (RPC) but not the cause as mentioned by sdaftuar :
> If this is a substantial problem, then I would think we should take action to protect our own wallet users as well (rather than hide the results of what our fee estimation would do!).
ACKs for top commit:
MarcoFalke:
re-ACK 4e28753f60 👋
jnewbery:
utACK 4e28753f60613ecd35cdef87bef5f99c302c3fbd
Tree-SHA512: c869cf03b86d8194002970bbc84662dae76874967949b9be0d9a4511a1eabcb1627c38aca3154da9dcece1a4c49ec02bd4f9fcca2ec310986e07904559e63ba8
Diffstat (limited to 'src/rpc')
-rw-r--r-- | src/rpc/blockchain.cpp | 10 | ||||
-rw-r--r-- | src/rpc/blockchain.h | 2 | ||||
-rw-r--r-- | src/rpc/mining.cpp | 16 |
3 files changed, 23 insertions, 5 deletions
diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp index 392073d047..57327e6004 100644 --- a/src/rpc/blockchain.cpp +++ b/src/rpc/blockchain.cpp @@ -17,6 +17,7 @@ #include <node/coinstats.h> #include <node/context.h> #include <node/utxo_snapshot.h> +#include <policy/fees.h> #include <policy/feerate.h> #include <policy/policy.h> #include <policy/rbf.h> @@ -81,6 +82,15 @@ ChainstateManager& EnsureChainman(const util::Ref& context) return *node.chainman; } +CBlockPolicyEstimator& EnsureFeeEstimator(const util::Ref& context) +{ + NodeContext& node = EnsureNodeContext(context); + if (!node.fee_estimator) { + throw JSONRPCError(RPC_INTERNAL_ERROR, "Fee estimation disabled"); + } + return *node.fee_estimator; +} + /* Calculate the difficulty for a given block index. */ double GetDifficulty(const CBlockIndex* blockindex) diff --git a/src/rpc/blockchain.h b/src/rpc/blockchain.h index 5b362bf211..91766aacc9 100644 --- a/src/rpc/blockchain.h +++ b/src/rpc/blockchain.h @@ -15,6 +15,7 @@ extern RecursiveMutex cs_main; class CBlock; class CBlockIndex; +class CBlockPolicyEstimator; class CTxMemPool; class ChainstateManager; class UniValue; @@ -54,5 +55,6 @@ void CalculatePercentilesByWeight(CAmount result[NUM_GETBLOCKSTATS_PERCENTILES], NodeContext& EnsureNodeContext(const util::Ref& context); CTxMemPool& EnsureMemPool(const util::Ref& context); ChainstateManager& EnsureChainman(const util::Ref& context); +CBlockPolicyEstimator& EnsureFeeEstimator(const util::Ref& context); #endif diff --git a/src/rpc/mining.cpp b/src/rpc/mining.cpp index 7d45ad9434..798973850f 100644 --- a/src/rpc/mining.cpp +++ b/src/rpc/mining.cpp @@ -1059,7 +1059,10 @@ static RPCHelpMan estimatesmartfee() { RPCTypeCheck(request.params, {UniValue::VNUM, UniValue::VSTR}); RPCTypeCheckArgument(request.params[0], UniValue::VNUM); - unsigned int max_target = ::feeEstimator.HighestTargetTracked(FeeEstimateHorizon::LONG_HALFLIFE); + + CBlockPolicyEstimator& fee_estimator = EnsureFeeEstimator(request.context); + + unsigned int max_target = fee_estimator.HighestTargetTracked(FeeEstimateHorizon::LONG_HALFLIFE); unsigned int conf_target = ParseConfirmTarget(request.params[0], max_target); bool conservative = true; if (!request.params[1].isNull()) { @@ -1073,7 +1076,7 @@ static RPCHelpMan estimatesmartfee() UniValue result(UniValue::VOBJ); UniValue errors(UniValue::VARR); FeeCalculation feeCalc; - CFeeRate feeRate = ::feeEstimator.estimateSmartFee(conf_target, &feeCalc, conservative); + CFeeRate feeRate = fee_estimator.estimateSmartFee(conf_target, &feeCalc, conservative); if (feeRate != CFeeRate(0)) { result.pushKV("feerate", ValueFromAmount(feeRate.GetFeePerK())); } else { @@ -1144,7 +1147,10 @@ static RPCHelpMan estimaterawfee() { RPCTypeCheck(request.params, {UniValue::VNUM, UniValue::VNUM}, true); RPCTypeCheckArgument(request.params[0], UniValue::VNUM); - unsigned int max_target = ::feeEstimator.HighestTargetTracked(FeeEstimateHorizon::LONG_HALFLIFE); + + CBlockPolicyEstimator& fee_estimator = EnsureFeeEstimator(request.context); + + unsigned int max_target = fee_estimator.HighestTargetTracked(FeeEstimateHorizon::LONG_HALFLIFE); unsigned int conf_target = ParseConfirmTarget(request.params[0], max_target); double threshold = 0.95; if (!request.params[1].isNull()) { @@ -1161,9 +1167,9 @@ static RPCHelpMan estimaterawfee() EstimationResult buckets; // Only output results for horizons which track the target - if (conf_target > ::feeEstimator.HighestTargetTracked(horizon)) continue; + if (conf_target > fee_estimator.HighestTargetTracked(horizon)) continue; - feeRate = ::feeEstimator.estimateRawFee(conf_target, threshold, horizon, &buckets); + feeRate = fee_estimator.estimateRawFee(conf_target, threshold, horizon, &buckets); UniValue horizon_result(UniValue::VOBJ); UniValue errors(UniValue::VARR); UniValue passbucket(UniValue::VOBJ); |