Proposal: Canton Network Indexer

Summary

• Canton Network Indexer — three-tier indexing infrastructure for Canton: public network data (Scan API), party-scoped private contracts (Ledger API/PQS), and cross-party aggregation with RBAC
• Fills a gap no existing indexer (The Graph, SubQuery) can address due to Canton's sub-transaction privacy model
• Working PoC with 24/24 passing tests: party isolation, lifecycle queries, observer access, JWT auth
• 16-week roadmap, 3 milestones, 625,000 CC milestone-based funding

Proof of Concept

PoC repo: https://github.com/zpoken/canton-network-indexer

Team

Zpoken — 50+ blockchain projects, $1.5B+ TVL shipped. Core contributors to Wormhole (ZK light clients), NEAR (ZK bridge), Polygon, and others.

Test plan

• PoC smoke tests pass (24/24)
• Party isolation verified (Alice ≠ Bob)
• JWT auth enforced at SQL level
• Contract lifecycle queries (create → exercise → archive)
• Observer access (regulator sees bonds)
• Docker Compose reproducible deployment