... functional Proof-of-Work loop (Blake3-backed header hashing), an ASERT-like difficulty retargeting hook, chain append/validation checks, and a local multi-node testnet runner you can launch from the CLI (status, mine, testnet). It also ships early ledger primitives (note commitment, nullifier derivation + nullifier set, and a commitment tree) as foundations for the later shielded transaction + proof system work. What s implemented right now: Consensus foundation (prototype): PoW header hashing + meetsTarget() and a working mining loop Chain logic: genesis ... ... sequential append validation (prev_hash, height, pow target) Difficulty retargeting (prototype): ASERT-like target adjustment utility used by the chain Testnet runner: local multi-node simulation that mines blocks across nodes Ledger

... Product Hunt! I m Light , the founder of the team building Ledger , a connected workspace that rolls chat, tasks, docs, whiteboards, files, calendars, and AI assist into one place so your team can stop bouncing between email, Slack, Asana, Google Docs, Miro, Dropbox, and Zoom to GSD. Ledger