This is a patch release of dcrd that updates the utxo cache to improve its robustness, optimize it, and correct some hard to hit corner cases that involve a mix of manual block invalidation, conditional flushing, and successive unclean shutdowns.

Changelog

This patch release consists of 19 commits from 1 contributor which total to 13 files changed, 1118 additional lines of code, and 484 deleted lines of code.

All commits since the last release may be viewed on GitHub here.

Developer-related package and module changes:

• blockchain: Misc consistency cleanup pass (decred/dcrd#3006)
• blockchain: Pre-allocate in-flight utxoview tx map (decred/dcrd#3006)
• blockchain: Remove unused utxo cache add entry err (decred/dcrd#3006)
• blockchain: Fix rare unclean utxo cache recovery (decred/dcrd#3006)
• blockchain: Don't fetch trsy{base,spend} inputs (decred/dcrd#3006)
• blockchain: Don't add treasurybase utxos (decred/dcrd#3006)
• blockchain: Separate utxo cache vs view state (decred/dcrd#3006)
• blockchain: Improve utxo cache spend robustness (decred/dcrd#3006)
• blockchain: Split regular/stake view tx connect (decred/dcrd#3006)
• blockchain: Bypass utxo cache for zero conf spends (decred/dcrd#3006)
• main: Use backported blockchain updates (decred/dcrd#3007)

Testing and Quality Assurance:

• blockchain: Address some linter complaints (decred/dcrd#3005)
• blockchain: Allow tests to override cache flushing (decred/dcrd#3006)
• blockchain: Improve utxo cache initialize tests (decred/dcrd#3006)
• blockchain: Consolidate utxo cache test entries (decred/dcrd#3006)
• blockchain: Rework utxo cache spend entry tests (decred/dcrd#3006)
• blockchain: Rework utxo cache commit tests (decred/dcrd#3006)
• blockchain: Rework utxo cache add entry tests (decred/dcrd#3006)

Misc:

• release: Bump for 1.7.5 (decred/dcrd#3008)

Code Contributors (alphabetical order):

• Dave Collins