[Backend] USDC balance indexer + endpoint (#84)

* support a fake USDC on sepolia

* fix balances indexer

* remove decimals support

* small refactoring

* activate entity mode on balances indexor

* configure balacnes db update

* fix balances indexor entity key

* fix entity mode config

* small drizzle refactor

* add drizzle migrations

* fix apibara insert/update on balances

* rename db url variable name

* remove useless config files

* remove more useless config files

* replace postgres-js by node-postgres

* removed balances indexer entity mode

* generate drizzle migration on build

backend/.gitignore

@@ -10,7 +10,7 @@ yarn-error.log*
 lerna-debug.log*
 .pnpm-debug.log*
 
-# Caches 
+# Caches
 
 .cache
 

backend/drizzle.config.ts

@@ -1,9 +1,12 @@
 /* eslint-disable import/no-unused-modules */
 
-import type { Config } from 'drizzle-kit'
+import { defineConfig } from 'drizzle-kit'
 
-export default {
+export default defineConfig({
   schema: './src/db/schema.ts',
-  out: './src/db/migrations',
+  out: './drizzle',
   driver: 'pg',
-} satisfies Config
+  dbCredentials: {
+    connectionString: process.env.DATABASE_URL ?? '',
+  },
+})

backend/drizzle/meta/_journal.json

@@ -0,0 +1 @@
+{"version":"5","dialect":"pg","entries":[]}

backend/package.json

@@ -6,6 +6,7 @@
     "typecheck": "tsc --noEmit",
     "drizzle:generate": "drizzle-kit generate:pg",
     "test": "vitest",
+    "prepare": "pnpm drizzle:generate",
     "coverage": "vitest run --coverage",
     "lint": "eslint . --max-warnings=0",
     "fix": "eslint . --fix"

backend/src/app.ts

@@ -2,7 +2,8 @@ import Fastify from 'fastify'
 import { Account } from 'starknet'
 
 import { fastifyDrizzle } from '@/db/plugin'
-import { declareRoutes } from '@/routes'
+
+import { declareRoutes } from './routes'
 
 export type AppConfiguration = {
   database: {

backend/src/db/drizzle.ts

@@ -14,7 +14,5 @@ export function drizzle(client: postgres.Sql, config: DrizzleConfig = {}) {
 
 export async function migrate(client: postgres.Sql, config: DrizzleConfig = {}) {
   // Notice that the path must be relative to the application root.
-  return await ogMigrate(drizzle(client, config), {
-    migrationsFolder: './src/db/migrations',
-  })
+  return await ogMigrate(drizzle(client, config), { migrationsFolder: './drizzle' })
 }