feat: add SlotUsageCheque (#403)

* feat: add SlotUsageCheque

* feat: signature -> signedMessage

* feat: remove unused columns

migrations/1644469112765_create-slot-usage-cheques.ts

@@ -0,0 +1,26 @@
+import { MigrationBuilder } from 'node-pg-migrate'
+import { SlotUsageCheque } from '../src/SlotUsageCheque'
+
+const tableName = SlotUsageCheque.tableName
+
+export const up = (pgm: MigrationBuilder) => {
+  pgm.createTable(
+    tableName,
+    {
+      id: { type: 'UUID', primaryKey: true, unique: true, notNull: true },
+      signedMessage: { type: 'TEXT', notNull: true },
+      collection_id: { type: 'TEXT', notNull: true },
+      third_party_id: { type: 'TEXT', notNull: true },
+      created_at: { type: 'TIMESTAMP', notNull: true },
+      updated_at: { type: 'TIMESTAMP', notNull: true },
+    },
+    { ifNotExists: true }
+  )
+
+  pgm.createIndex(tableName, 'collection_id')
+  pgm.createIndex(tableName, 'third_party_id')
+}
+
+export const down = (pgm: MigrationBuilder) => {
+  pgm.dropTable(tableName, {})
+}

src/SlotUsageCheque/SlotUsageCheque.model.ts

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+import { Model } from 'decentraland-server'
+
+import { SlotUsageChequeAttributes } from './SlotUsageCheque.types'
+
+export class SlotUsageCheque extends Model<SlotUsageChequeAttributes> {
+  static tableName = 'slot_usage_cheques'
+}

src/SlotUsageCheque/SlotUsageCheque.types.ts

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+export type SlotUsageChequeAttributes = {
+  id: string
+  signedMessage: string
+  collection_id: string
+  third_party_id: string
+  updated_at: Date
+  created_at: Date
+}

src/SlotUsageCheque/index.ts

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+export * from './SlotUsageCheque.types'
+export * from './SlotUsageCheque.model'