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VeilChain: A Zig-based quantum-resistant shielded PoW testnet prototype
VeilChain is a Zig-based blockchain node. Today it already includes a 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 primitives (foundation): note commitments, nullifier derivation/set, simple commitment tree root
Why this matters:
If you re building toward post-quantum and shielded-chain designs, you need an execution layer that s deterministic and testable. VeilChain provides a real, runnable base in Zig so the next milestones (p2p connectivity, persistence, shielded transaction circuit/proofs, full RPC surface) can be added incrementally without losing correctness.
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