RFC: Canton Bindings — multi-language SDKs + JWT/OIDC + pre-flight profiler (active discussion on grants-discuss)

Outreach
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Hi everyone, sharing a heads-up on a Dev Fund RFC currently active
on grants-discuss, in case the community here would like to weigh in.

Following the Q1 2026 Developer Experience survey results that @dunebuggie
shared earlier this year, my co-founder Anirudh Singh and I (HackTour India,
https://x.com/HackTourIND) have scoped a proposal for the three runtime-layer
gaps the survey called out that no current PR addresses:

  • Typed Client SDK + Code Generator for languages beyond TypeScript
    (Python, Java/Kotlin, Rust, Go)
  • JWT/OIDC authentication middleware for TradFi/Hybrid teams
  • Pre-flight transaction byte-size and Canton Coin cost profiler

Working name: Canton Bindings.

Deliberately complementary to Cantool (#77),
CantonTrace (#185), PartyLayer (#9), and Wallet Gateway (#109), with a
Cantool plugin in Milestone 4 so it integrates cleanly with Eric’s CLI.

Active discussion thread on grants-discuss:
https://lists.sync.global/g/grants-discuss/topic/rfc_canton_bindings/119439952

Full design doc (architecture, milestones, alignment table, risk register):

Would especially love input from folks in the Daml Tooling, DAR Lifecycle,
dApp Integration, and Canton APIs SIGs, and anyone building TradFi/Hybrid
apps who’s hit the JWT pain firsthand. Discussion in either venue welcome.

Thanks!
— Jatin