Proposal: Automatic handling of unavailable counterparties

Development Fund Proposal Submission

Proposal file:

/proposals/2026-07-DA-automatic-handling-unavailable-counterparties.md

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Summary

This proposal introduces an automated, persistent counterparty lifecycle management system in the SV App to handle unresponsive counterparties and those with vetting errors. By shifting counterparty exclusions from in-memory lists to persistent SQL-level anti-joins and isolating failures via recursive batch splitting, this mechanism prevents failing nodes from blocking healthy trigger processing, eliminates manual operator intervention, and scales up to 100M total network parties.

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Checklist

• [x] Proposal file added under /proposals/
• [ ] Milestones and funding amounts defined
• [x] Acceptance criteria included
• [x] Alignment with Canton priorities described

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Notes for Reviewers

(Add anything the Tech & Ops Committee should pay attention to.)