v2.0.0

Breaking Changes

• Rework how PoP Miners and BFG work (#396).
  For details on running a v2 PoP Miner, see the popmd readme.

  • Rewrite bfgd to serve as an API layer for finality data. PoP miners no longer use bfgd.
  • Remove bssd. PoP payouts are now handled by op-geth.
  • Add indexing for Hemi Keystones published to Bitcoin by PoP miners (#549).
  • Rewrite popmd. To run popmd, the following data sources are now required:
    • A Hemi op-geth node (for keystone notifications).
    • A "Gozer" Bitcoin data source, such as TBC, to retrieve Bitcoin data and publish PoP transactions. Gozer can also be used to provide fee estimations.
  • PoP Miners can now use either a static fee or dynamic fee estimations from Gozer.

• Rename Go module to github.com/hemilabs/heminetwork/v2 (add /v2 suffix) (#622).

Added

• Add hproxyd, a simple and efficient RPC request proxy to replace proxyd (#568, #574, #576).

• Add Prometheus metrics and health check endpoints to bfgd and popmd (#619).

• Add supply chain attestations for releases (#634).

• Add documentation for running popmd (#597).

bitcoin package

• Add bitcoin/gozer package: Bitcoin data interface layer, with a basic implementation for Blockstream (Electrs) and a complete implementation supporting the TBC RPC API (#562).
• Add bitcoin/vinzclortho package: Bitcoin wallet interface that handles creation and derivation of Bitcoin addresses (#562).
• Add bitcoin/zuul package: Interface for handling the storage of secret material, such as Bitcoin wallet private keys (#562).

Tiny Bitcoin Client (TBC)

• Add support for Bitcoin testnet4 (#521).
• Add indexing for Hemi Keystones published to Bitcoin by PoP miners (#549).
• Add Bitcoin mempool support (#549).
• Add transaction fee estimation (#549). This can be used by popmd when creating PoP transactions.
• Add Hemi Keystone height hash index with V4 database upgrade, allowing keystones to be retrieved at a specified block height (#539). Used in op-geth for handling PoP payouts.
• Add standalone TBC Docker image: hemilabs/tbcd, ghcr.io/hemilabs/tbcd (#531).

localnode

Note

The localnode directory still uses an older version of the Hemi stack. After this release, all node-running
resources and documentation will move to a separate repository, maintained and versioned independently, with its own changelog.

• Add easy-to-follow quickstart section to the node running documentation (#656).

Changed

• Update localnode config with new testnet P2P nodes (#650).

• Move common test utilities into a new testutil package to reduce duplication and simply testing (#530).

• Update Hemi keystone genesis block on Bitcoin testnet4 to 00000000a14c6e63123ba02d7e9fd173d4b04412c71a31b7a6ab8bb3106c9231 (#654). The previous block was removed by a long re-org.

• Replace time.After with time.Tick to avoid issues on sleeping dev machines (#580).

• Update README.md file with current information (#593).

Removed

• Remove WebAssembly support from the PoP Miner (#526).

• Remove extool, an unused Electrum/Electrs CLI utility (#625).

Fixed

• Fix duplicate flag.Parse call in cmd/keygen (#565).
• Fix typos across the codebase (#550, #564, #633, #658, #663).

Contributors

Thank you to everyone who contributed to this release!

• @AL-CT
• @ClaytonNorthey92
• @Dzmitryy1812
• @Galoretka
• @jcvernaleo
• @joshuasing
• @kks-code
• @lechpzn
• @leopardracer
• @marcopeereboom
• @max-sanchez
• @moshderte
• @pxwanglu
• @tosynthegeek
• @yinwenyu6