Cowrie Research

quai-network

3 min read

Quai Network

  • Name: Quai Network
  • URL: https://qu.ai/
  • Category: hierarchical merged-mined proof-of-work network / cross-chain shared-security infrastructure / dual-token monetary system
  • Summary: Quai is hierarchical merged-mined proof-of-work with two native assets. The note matters because shared security, cross-chain coordination, and the monetary split all sit inside one protocol surface instead of being bolted together later.
  • What it does:
    • Organizes the network into one Prime chain, three Region chains, and nine Zone chains, with miners checking each nonce against multiple difficulty thresholds so one mining operation can simultaneously secure multiple layers of the hierarchy
    • Uses merged mining and coincident blocks to connect chains and present cross-chain movement as a core protocol property rather than an add-on bridge system
    • Frames PoEM and related intrinsic-work / entropy-based fork-choice research as the reason the network can reduce ambiguity over which block wins and coordinate many parallel execution environments
    • Exposes an EVM-compatible asset, QUAI, alongside a separate UTXO-based asset, QI, with miners able to choose reward denomination and users able to convert between the two according to protocol-driven reward relationships
    • Uses rolling difficulty adjustment and contrasting emission curves to make QUAI increasingly scarce while letting QI expand more directly with mining conditions and transactional demand
    • Publishes an official Go implementation plus a QIP process that already separates control surfaces such as sharded ledger design, cross-shard transactions, merge-mined transactions, Qi ledger rules, and dynamic tree expansion
  • Key claims:
    • Quai’s core architectural claim is simple: one hierarchical merged-mined system ties Prime, Region, and Zone chains together instead of fragmenting security across separate subnets.
    • Coincident blocks are the practical cross-chain mechanism. They matter more than generic parallel execution language because they are how the hierarchy stays coordinated.
    • PoEM is the main differentiator from generic fast-PoW rhetoric. Quai ties its scaling pitch to an intrinsic-work / entropy-based fork-choice model rather than to throughput claims alone.
    • QUAI and QI are not generic dual-token filler. Miner denomination choice, conversion mechanics, and different issuance behavior make the monetary split part of the protocol design.
    • The QIP process makes the future control surface legible: sharded-ledger semantics, cross-shard routing, merge-mined transaction behavior, Qi rules, and tree expansion can all move through governance and implementation updates.
  • Whitepaper: Official litepaper at https://qu.ai/litepaper, saved locally as ../whitepapers/quai-network-litepaper.pdf. Supporting source notes: ../whitepapers/quai-network-primary-sources-2026-05-14.md.
  • Sources:

Control surface

  • Practical leverage sits in client implementation, hierarchy-growth policy, cross-shard routing rules, miner reward denomination, token-conversion mechanics, and the QIP process that can change those pieces over time.

  • Read Quai as a protocol trying to fuse shared-security scaling and monetary-role separation, not as just another fast EVM pitch.

  • Last reviewed: 2026-06-18 UTC

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