Release chain-0.23.0

Summary

This release of bdk_chain v.0.23.0 introduces a new option to cache and persist derived script pubkeys, improving performance on KeychainTxOutIndex startup, the tx_graph module now tracks and persists the first_seen timestamp for transactions which is useful for transaction ordering. The bdk_core crate added convenient is_empty methods to types TxUpdate, {Sync,Scan}Response, making it easier to check for no-op updates.

Also released:

• bdk_core v0.6.0
• bdk_bitcoind_rpc v0.20.0
• bdk_electrum v0.23.0
• bdk_esplora v0.22.0
• bdk_file_store v0.21.0
• bdk_testenv v0.13.0

What's Changed

• feat!(chain): implement first_seen tracking by @uvuvuwu in #1950
• fix(docs): merge_chains outdated documentation by @oleonardolima in #1806
• chore: Update rust-version to 1.86.0 by @ValuedMammal in #1955
• Add zizmor github actions security analysis workflow by @notmandatory in #1813
• chore: create and apply rustfmt.toml by @luisschwab in #1946
• Add is_empty methods to TxUpdate and {}_Response types by @evanlinjin in #1961
• fix(chain): persist first_seen by @LagginTimes in #1966
• Persist spks derived from KeychainTxOutIndex by @evanlinjin in #1963

Persistence

This release includes two SQLite migrations:

• A new first_seen column added to the TxGraph change set. If you rely on transaction ordering or unconfirmed tx handling, be aware of the new first_seen logic.
• A new bdk_descriptor_derived_spks table for persisting previously derived script pubkeys.

Full Changelog: chain-0.22.0...chain-0.23.0