GitHub ↗

PQBit

Bitcoin as it would be designed in 2026, with fifteen years of hindsight. Quantum-resistant from genesis. Lightweight by construction. Fair-launch by constitution.

What it is

~7M BTC sit in quantum-exposed addresses. BIP-360 (P2MR) was merged into the Bitcoin BIPs repo in February 2026 — the migration conversation is live, but Bitcoin moves slowly by design. pqbit is the chain that doesn't need to migrate: it was born post-quantum.

Not a faster Bitcoin. Not a token sale. One thesis, executed cleanly.

Constitution (non-negotiable)

Principle Commitment
Fair launch No premine, no presale, no VC allocation
Founder stash ≤ 100 coins, public address, never moved
PQC from genesis ML-DSA-44 + SLH-DSA only. No ECDSA fallback, ever
Fixed supply 21M cap proposed (GENESIS.md draft v0.1), public emission
Kill criteria < 50 non-founder nodes 6 months after genesis → frozen, back to research

Current status

  • pqbit-core: PQ transaction model, canonical sighash, sign/verify round-trips
  • pqbit-node: blocks, PoW, coinbase (height committed in prevout), UTXO set with ML-DSA spend authorization, CLI miner
  • 9/9 tests — including a double-spend test that caught a real txid-collision bug during development
  • GENESIS.md draft v0.1 open for public review

Genesis parameters (draft)

Full document: GENESIS.md

Parameter Proposed
Supply cap 21,000,000 pqc
Block interval 5 min (testnet data may change this)
Initial reward 50 pqc/block, halving every 210,000 blocks
Signatures ML-DSA-44 (primary) + SLH-DSA-SHA2-128s (alt output type)
PoW Undecided — memory-hard leaning, decided by testnet

FAQ

Is this a token sale? No — never. The only monetary event is mining from genesis.

Why not wait for BIP-360 on Bitcoin? If it activates, pqbit served as a reference implementation (research win). If the market wants a quantum-safe chain sooner, pqbit exists (product win). Both outcomes are wins.

Can I participate? Read the code, run the node (cargo run -- mine --blocks 3), review GENESIS.md. The repo is the front door.