feat: add off-chain notification service (#114)#205
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- notification-service/ — Node.js/TypeScript service that polls Horizon for governance contract events and notifies subscribers - src/types.ts — GovernanceEvent, Subscriber, SubscriptionStore types - src/subscriptions.ts — CRUD + matching logic, JSON file persistence - src/notifier.ts — email (nodemailer) and webhook (axios) dispatch - src/watcher.ts — Horizon event poller with cursor tracking - src/index.ts — CLI: start | subscribe | unsubscribe | list - .env.example — all configurable env vars documented - docs/notification-service.md — setup, usage, CLI reference, payload format - README.md — project structure entry + Resources link Closes PrincessnJoy#114
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Summary
Implements an off-chain notification service that watches Stellar Horizon for CosmosVote governance events and notifies subscribers via email and/or webhook.
Changes
notification-service/(new)src/types.ts—GovernanceEvent,Subscriber,SubscriptionStoretypessrc/subscriptions.ts— subscriber CRUD, event matching, JSON file persistence with cursor trackingsrc/notifier.ts— email dispatch (nodemailer/SMTP) and webhook dispatch (axios)src/watcher.ts— polls Horizon contract events, filters(gov, created/voted/final/exec/cancel), resumes from last cursorsrc/index.ts— CLI entry:start,subscribe,unsubscribe,list.env.example— all config variables documentedpackage.json/tsconfig.json— project config matching repo conventionsDocs
docs/notification-service.md— setup guide, CLI reference, webhook payload format, subscription file formatREADME.md— project structure and Resources section updatedAcceptance Criteria
Closes #114