Blockbook implementation for the Blockchain trait?

[dspicher]

Blockbook is a popular block explorer service, implemented and used by Trezor.

Would you be interested in a PR that implements the Blockchain trait for it?

[notmandatory]

The team is currently working on a refactor that will make the core bdk wallet more agnostic to which blockchain client is used, after this change is done an example of how to sync a bdk based wallet with Blockbook would certainly be interesting. See #793 for new examples with electrum and esplora clients.

[dspicher]

Thanks for the info, I will take a look at the examples there 👍

[va-an]

Hi! Here's what I'm thinking, based on the current BDK architecture and the Blockbook REST API:

• add two crates in nursery/:
  • blockbook-client - a minimal HTTP client covering only the subset of Blockbook API needed for BDK integration.
  • bdk_blockbook - an extension trait BlockbookExt on the client (similar to EsploraExt), implementing full_scan() and sync().
• add an example_blockbook following the same structure as example_esplora with example_cli.

I found an existing blockbook crate that has a bdk feature, but it targets bdk 1.0.0-alpha.2 and hasn't been updated since early 2024. It also pulls in WebSocket support and other dependencies we wouldn't need.

@notmandatory does this sound good?

[va-an]

Noticed #2006 which migrates standalone examples to rustdoc.
The plan stays the same, but with rustdoc examples in the crate instead of a standalone example_blockbook.