[blockchain-v4]: Harden and optimize utxo cache.#3006

Merged

davecgh merged 17 commits intodecred:blockchain_v4from davecgh:blockchainv4_utxocache_coherence

Oct 10, 2022

+1,130-487

Commits on Oct 10, 2022

[blockchain-v4] blockchain: Address some linter complaints.
davecgh
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[blockchain-v4] blockchain: Misc consistency cleanup pass.
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[blockchain-v4] blockchain: Pre-allocate in-flight utxoview tx map.
davecgh
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[blockchain-v4] blockchain: Remove unused utxo cache add entry err.
davecgh
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[blockchain-v4] blockchain: Allow tests to override cache flushing.
davecgh
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[blockchain-v4] blockchain: Improve utxo cache initialize tests.
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[blockchain-v4] blockchain: Fix rare unclean utxo cache recovery.
davecgh
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[blockchain-v4] blockchain: Don't fetch trsy{base,spend} inputs.
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[blockchain-v4] blockchain: Don't add treasurybase utxos.
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[blockchain-v4] blockchain: Consolidate utxo cache test entries.
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[blockchain-v4] blockchain: Rework utxo cache spend entry tests.
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[blockchain-v4] blockchain: Rework utxo cache commit tests.
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[blockchain-v4] blockchain: Rework utxo cache add entry tests.
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[blockchain-v4] blockchain: Separate utxo cache vs view state.
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[blockchain-v4] blockchain: Improve utxo cache spend robustness.
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[blockchain-v4] blockchain: Split regular/stake view tx connect.
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[blockchain-v4] blockchain: Bypass utxo cache for zero conf spends.
davecgh
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