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add chain interface methods for using BIP 157 block filters

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This is useful for speeding up wallet rescans and is based on an
earlier version from PR #15845 ("wallet: Fast rescan with BIP157 block
filters"), which was never merged.

Co-authored-by: MacroFake <falke.marco@gmail.com>
This commit is contained in:
Sebastian Falbesoner 2022-08-23 16:10:59 +02:00
parent e7a0e96271
commit 088e38d3bb
2 changed files with 24 additions and 0 deletions
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8
src/interfaces/chain.h
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@ -5,6 +5,7 @@
#ifndef BITCOIN_INTERFACES_CHAIN_H
#define BITCOIN_INTERFACES_CHAIN_H
#include <blockfilter.h>
#include <primitives/transaction.h> // For CTransactionRef
#include <util/settings.h> // For util::SettingsValue
@ -143,6 +144,13 @@ public:
//! or one of its ancestors.
virtual std::optional<int> findLocatorFork(const CBlockLocator& locator) = 0;
//! Returns whether a block filter index is available.
virtual bool hasBlockFilterIndex(BlockFilterType filter_type) = 0;
//! Returns whether any of the elements match the block via a BIP 157 block filter
//! or std::nullopt if the block filter for this block couldn't be found.
virtual std::optional<bool> blockFilterMatchesAny(BlockFilterType filter_type, const uint256& block_hash, const GCSFilter::ElementSet& filter_set) = 0;
//! Return whether node has the block and optionally return block metadata
//! or contents.
virtual bool findBlock(const uint256& hash, const FoundBlock& block={}) = 0;

16
src/node/interfaces.cpp
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@ -4,10 +4,12 @@
#include <addrdb.h>
#include <banman.h>
#include <blockfilter.h>
#include <chain.h>
#include <chainparams.h>
#include <deploymentstatus.h>
#include <external_signer.h>
#include <index/blockfilterindex.h>
#include <init.h>
#include <interfaces/chain.h>
#include <interfaces/handler.h>
@ -536,6 +538,20 @@ public:
}
return std::nullopt;
}
bool hasBlockFilterIndex(BlockFilterType filter_type) override
{
return GetBlockFilterIndex(filter_type) != nullptr;
}
std::optional<bool> blockFilterMatchesAny(BlockFilterType filter_type, const uint256& block_hash, const GCSFilter::ElementSet& filter_set) override
{
const BlockFilterIndex* block_filter_index{GetBlockFilterIndex(filter_type)};
if (!block_filter_index) return std::nullopt;
BlockFilter filter;
const CBlockIndex* index{WITH_LOCK(::cs_main, return chainman().m_blockman.LookupBlockIndex(block_hash))};
if (index == nullptr || !block_filter_index->LookupFilter(index, filter)) return std::nullopt;
return filter.GetFilter().MatchAny(filter_set);
}
bool findBlock(const uint256& hash, const FoundBlock& block) override
{
WAIT_LOCK(cs_main, lock);