Anchor AppView Deployment Guide

Ensure you have the Val Town CLI installed:

npm install -g @valtown/cli
# or
npx @valtown/cli --help

This AppView consists of 3 main Val Town functions:

1. jetstreamPoller - Cron job (5 minutes)
2. anchorAPI - HTTP function
3. socialGraphSync - Cron job (daily)

# Deploy the ingestion cron job
vt create cron jetstreamPoller --file src/ingestion/jetstream-poller.ts --schedule "*/5 * * * *"

# Deploy the HTTP API
vt create http anchorAPI --file src/api/anchor-api.ts

# Deploy the social sync cron job
vt create cron socialGraphSync --file src/social/social-graph-sync.ts --schedule "0 2 * * *"

# List your functions
vt list

# Check function status
vt status jetstreamPoller
vt status anchorAPI
vt status socialGraphSync

# Get your API URL
API_URL=$(vt url anchorAPI)

# Test endpoints
curl "$API_URL/stats"
curl "$API_URL/global?limit=5"

If you prefer the web interface:

Tables are automatically created when functions first run.

• Go to val.town
• Create new cron function: jetstreamPoller
• Copy code from src/ingestion/jetstream-poller.ts
• Set schedule: */5 * * * *

• HTTP function: anchorAPI from src/api/anchor-api.ts
• Cron function: socialGraphSync from src/social/social-graph-sync.ts (schedule: 0 2 * * *)

No environment variables are required for the basic deployment. All authentication uses public APIs.

Monitor the jetstreamPoller logs to ensure it's receiving and processing check-in events.

Use the provided test script or Val Town CLI:

# Using the test script (update BASE_URL first)
./scripts/test-api.sh

# Or using Val Town CLI
API_URL=$(vt url anchorAPI)
curl "$API_URL/global?limit=5"
curl "$API_URL/stats"
curl "$API_URL/nearby?lat=52.0705&lng=4.3007&radius=5"

Check the processing_log_v1 table to monitor ingestion health and performance.

• Monitor SQLite performance as data grows
• Consider implementing pagination for large result sets
• Add query timeout handling for long-running spatial queries

• The social graph sync includes built-in rate limiting
• Jetstream poller has a 45-second collection window
• API endpoints have built-in limits (max 100 results per query)

• All functions include comprehensive error handling
• Failed address resolutions are cached to avoid retry storms
• Processing logs track errors for monitoring

• Monitor the /stats endpoint for system health
• Check processing logs for ingestion errors
• Monitor SQLite database size and performance

• Periodically clean up old processing logs
• Monitor address cache hit rates
• Consider archiving old check-ins if storage becomes an issue

• When changing database schema, increment table versions (e.g., checkins_v1 → checkins_v2)
• Test schema migrations carefully in development
• Consider data migration scripts for breaking changes

1. Jetstream connection failures: Check network connectivity and Jetstream service status
2. Address resolution errors: Verify AT Protocol network accessibility
3. Social graph sync failures: Check Bluesky API rate limits and status
4. SQLite performance: Monitor query execution times and optimize indexes

• All functions include detailed logging
• Use Val Town's built-in debugging tools
• Monitor function execution times and memory usage

• All API endpoints include proper CORS headers
• No sensitive data is logged or stored
• Public APIs are used for all external integrations
• Rate limiting prevents abuse of external services

The deployed AppView provides these endpoints for the Anchor client:

• Nearby Feed: Location-based spatial queries
• User Feed: Personal check-in history
• Following Feed: Social feed based on Bluesky follows
• Stats: System health and metrics

Each endpoint returns properly formatted JSON with consistent response structures for easy client integration.