Zebra 1.0.0-beta.12

This release improves Zebra's Orchard proof verification performance and sync performance.
Zebra prefers to connect to peers on the canonical Zcash ports.

This release also contains some breaking changes which:

• improve usability, and
• make Zebra compile faster.

Breaking Changes

Cache Deletion

• Zebra deletes unused cached state directories in <OS-specific cache dir>/zebra (#4586)
  These caches only contain public chain data, so it is safe to delete them.

Compile-Time Features

• Most of Zebra's tracing and metrics features are off by default at compile time (#4539, #4680)
• The enable-sentry feature has been renamed to sentry (#4623)

Config

• Times in zebrad.config change from seconds/nanoseconds to a human-readable format.
  Remove times in the old format, or use zebrad generate to create a new config. (#4587)

Added

Diagnostics

• Show the current network upgrade in progress logs (#4694)
• Add some missing tracing spans (#4660)
• Add tokio-console support to zebrad (#4519, #4641)
• Add fallible_impl_from clippy lint (#4609)
• Add unwrap_in_result clippy lint (#4667)

Testing

• Check that old zebrad.toml configs can be parsed by the latest version (#4676)
• Test cargo doc warnings and errors (#4635, #4654)
• Document how to run full sync and lightwalletd tests (#4523)

Continuous Integration

• Add beta rust to CI (#4637, #4668)
• Build each Zebra crate individually (#4640)

Changed

Chain Sync

• Update mainnet and testnet checkpoint hashes (#4708)

Diagnostics

• Update transaction verification dashboard to show all shielded pool sigs, proofs, nullifiers (#4585)

Testing

• Add an identifiable suffix to zcash-rpc-diff temp directories (#4577)

Dependencies

• Managecargo-mdbook as a GitHub action (#4636)

Continuous Integration

• Automatically delete old GCP resources (#4598)

Documentation

• Improve the release checklist (#4568, #4595)

Removed

Continuous Integration

• Remove redundant build-chain-no-features job (#4656)

Fixed

Performance

• Upgrade halo2 and related dependencies to improve proof verification speed (#4699)
• Change default sync config to improve reliability (#4662, #4670, #4679)
• Fix a lookahead config panic (#4662)

Continuous Integration

• Actually create a cached state image after running a sync (#4669)
• Split docker run into launch, logs, and wait, to avoid GitHub job timeouts (#4675, #4690)
• Ignore lightwalletd test hangs for now (#4663)
• Disable zcash_rpc_conflict test on macOS (#4614)
• Use latest lightwalletd image for Zebra's Dockerfile (#4599)
• Increase lightwalletd timeout, remove testnet tests (#4584)

Documentation

• Fix various cargo doc warnings (#4561, #4611, #4627)
• Clarify how Zebra and zcashd interact in README.md (#4570)
• Improve lightwalletd tutorial (#4566)
• Simplify README and link to detailed documentation (#4680)

Diagnostics

• Resolve some lifetime and reference lints (#4578)

Security

• When connecting to peers, ignore invalid ports, and prefer canonical ports (#4564)