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Block Zero Chain Parameters (Draft v0.2)

This is the current MVP proposal before code-level implementation.

Principles

  • No premine
  • No founder reward
  • No ICO/presale allocation
  • Conservative defaults where possible
  • Keep consensus changes minimal and explicit

Token and Emission

  • Symbol: BLOZ
  • Max supply target: 21,000,000 BLOZ
  • Genesis allocation: 0
  • Block 1 onward: normal mining reward only

Timing Models Considered

Option A (Bitcoin-like)

  • Target block time: 10 minutes
  • Halving interval: 210,000 blocks
  • Pros: closest to Bitcoin behavior and operational expectations
  • Cons: slower UX and slower confirmation cadence

Option B (faster cadence)

  • Target block time: 2.5 minutes
  • Halving interval: 840,000 blocks (to keep similar time-based halving)
  • Pros: faster user feedback and testing loops
  • Cons: higher orphan/reorg pressure if networking is weak

MVP Decision

Use Option A (10 minutes) for MVP testnet and initial mainnet:

  • simpler operational assumptions
  • easier comparability with Bitcoin behavior
  • lower moving parts while fork is new

Option B is deferred until after post-launch stability review.

Network-Specific Draft

Mainnet (draft)

  • unique magic bytes: TBD (must not overlap Bitcoin/Litecoin/Dogecoin known sets)
  • default P2P port: TBD (non-standard, non-overlapping)
  • default RPC port: TBD (non-standard, non-overlapping)
  • address prefixes (Base58/Bech32): TBD (visually distinct from Bitcoin)
  • checkpoints: none initially; add later via governance process

Testnet (draft)

  • separate magic bytes/ports from mainnet
  • easier mining threshold for early testing
  • faucet-compatible policy
  • shorter difficulty-recovery behavior if needed for reliability
  • no assumptions of value transfer; testing and education only

Regtest (draft)

  • local-only defaults
  • instant/controlled mining for test automation
  • no external peers by default
  • deterministic CI-friendly settings

Security Notes

  • All chainparams must be reviewed as consensus-critical.
  • Never reuse Bitcoin network identity constants.
  • Prefix collisions must be tested before wallet release.

Open Decisions

  1. Difficulty adjustment profile for early network
  2. Initial testnet mining ease and anti-stall behavior
  3. Bech32 HRP and Base58 prefix set
  4. Exact non-conflicting magic-bytes and port assignments

Concrete Values

See chainparams-v0-proposal.md for concrete proposed magic bytes, ports, address prefixes and emission constants.