feat: add deterministic identity storage for indexed events

.env.example

@@ -1,6 +1,47 @@
 PORT=3000
 DATABASE_URL=postgres://user:password@localhost:5432/db
 DATABASE_PORT=5432
+DATABASE_USERNAME=postgres
+DATABASE_PASSWORD=postgres
+
 JWT_SECRET=super_secret_long_string_at_least_32_chars
 HASH_PEPPER=secure_random_pepper_at_least_16_chars
 NODE_ENV=development
+
+################################################################################
+
+# Cairo/StarkNet integration
+# Set CAIRO_MOCK=true for local development without a chain connection.
+CAIRO_MOCK=true
+
+# When CAIRO_MOCK is false/empty, set these:
+# CAIRO_RPC_URL=
+# CAIRO_ACCOUNT_ADDRESS=
+# CAIRO_PRIVATE_KEY=
+# CAIRO_FACTORY_CONTRACT_ADDRESS=
+# Optional: CAMPAIGN_CREATED_EVENT_KEY=
+
+################################################################################
+
+# Soroban indexer
+# These values are used by code under indexer/.
+INDEXER_PORT=4000
+INDEXER_LOG_LEVEL=info
+
+# Indexer database configuration (can use same or separate database)
+INDEXER_DATABASE_HOST=localhost
+INDEXER_DATABASE_PORT=5432
+INDEXER_DATABASE_USERNAME=postgres
+INDEXER_DATABASE_PASSWORD=postgres
+INDEXER_DATABASE_NAME=fundable_indexer
+INDEXER_DATABASE_SSL=false
+
+SOROBAN_RPC_URL=https://soroban-testnet.stellar.org
+STELLAR_NETWORK_PASSPHRASE=Test SDF Network ; September 2015
+POLL_INTERVAL_MS=5000
+START_LEDGER=
+
+# Comma-separated contract IDs. Keep production values out of commits unless
+# they are intended to be public configuration.
+STREAMS_CONTRACT_IDS=
+DISTRIBUTIONS_CONTRACT_IDS=

indexer/common/package.json

@@ -4,7 +4,8 @@
   "private": true,
   "type": "module",
   "exports": {
-    ".": "./src/index.ts"
+    ".": "./src/index.ts",
+    "./db": "./src/db/index.ts"
   },
   "scripts": {
     "build": "tsc -p tsconfig.json",