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wallet: Avoid use of Chain::Lock in CWallet::ScanForWalletTransactions

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This is a step toward removing the Chain::Lock class and reducing cs_main
locking.

This change affects behavior in a few small ways.

- If there's no max_height specified, percentage progress is measured ending at
  wallet last processed block instead of node tip

- More consistent error reporting: Early check to see if start_block is on the
  active chain is removed, so start_block is always read and the triggers an
  error if it's unavailable
This commit is contained in:
Russell Yanofsky
2020-01-22 16:53:42 -05:00
parent 1be8ff280c
commit c0d07dc4cb
8 changed files with 65 additions and 42 deletions
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7
src/interfaces/chain.cpp
View File

@@ -251,6 +251,13 @@ public:
WAIT_LOCK(cs_main, lock);
return FillBlock(ChainActive().FindEarliestAtLeast(min_time, min_height), block, lock);
}
bool findNextBlock(const uint256& block_hash, int block_height, const FoundBlock& next, bool* reorg) override {
WAIT_LOCK(cs_main, lock);
CBlockIndex* block = ChainActive()[block_height];
if (block && block->GetBlockHash() != block_hash) block = nullptr;
if (reorg) *reorg = !block;
return FillBlock(block ? ChainActive()[block_height + 1] : nullptr, next, lock);
}
bool findAncestorByHeight(const uint256& block_hash, int ancestor_height, const FoundBlock& ancestor_out) override
{
WAIT_LOCK(cs_main, lock);

5
src/interfaces/chain.h
View File

@@ -148,6 +148,11 @@ public:
//! information.
virtual bool findFirstBlockWithTimeAndHeight(int64_t min_time, int min_height, const FoundBlock& block={}) = 0;
//! Find next block if block is part of current chain. Also flag if
//! there was a reorg and the specified block hash is no longer in the
//! current chain, and optionally return block information.
virtual bool findNextBlock(const uint256& block_hash, int block_height, const FoundBlock& next={}, bool* reorg=nullptr) = 0;
//! Find ancestor of block at specified height and optionally return
//! ancestor information.
virtual bool findAncestorByHeight(const uint256& block_hash, int ancestor_height, const FoundBlock& ancestor_out={}) = 0;