Proposal: Canton Event Stream — real-time ledger events via WebSocket…
VotingPR- SIG
- needs-SIG
- Champion
- Canton Foundation
- Author org
- —
- Ask
- 300,000
Abstract
Summary Canton Event Stream is a self-hostable, MIT-licensed Node.js service that connects to any Canton participant node and delivers classified, party-routed ledger events to application clients over WebSocket and SSE. It solves the missing push layer in the Canton ecosystem — the infrastructure between the raw JSON Ledger API stream and live UIs, deposit detectors, and reactive backends. The core implementation exists today inside Qasara's commercial Canton Gateway; this proposal extracts and open-sources it as a standalone package in 3 milestones over 6 weeks, funded at 300,000 CC.
Milestones
| Title | Due date | Target | Amount (CC) |
|---|---|---|---|
| Standalone Package + Replay | — | — | 120,000 |
| Integration Tests + AsyncAPI Spec | — | — | 100,000 |
| Production Hardening + Community Onboarding | Apr 23, 2026 | — | 80,000 |
| Total | 300,000 | ||
Budget impact
- % of approved-to-date
- 0.4%
- % if all RFV pass
- —
RFV scenario unavailable — using approved-to-date as denominator (degraded mode).
- Ask (CC)
- 300,000
Comments by org
60 comments · 6 orgs · last activity Oct 21, 2026
| Organisation | Comments |
|---|---|
| Unknown | 31 |
| Digital Asset | 20 |
| FTP | 4 |
| Canton Foundation | 2 |
| Woof | 1 |
| Supra.com | 1 |
| VertexPoint Labs | 1 |