Chore: make notifications table migration

migrations/1607009558538-create-notifications-table.js

@@ -0,0 +1,41 @@
+var db = require('./db')
+
+function singleQuotify(item) {
+  return "'" + item + "'"
+}
+
+var types = [
+  'highValueTransaction',
+  'fiatBalance',
+  'cryptoBalance',
+  'compliance',
+  'error'
+]
+  .map(singleQuotify)
+  .join(',')
+
+exports.up = function (next) {
+  const sql = [
+    `
+    CREATE TYPE notification_type AS ENUM ${'(' + types + ')'};
+    CREATE TABLE IF NOT EXISTS "notifications" (
+        "id" uuid NOT NULL PRIMARY KEY,
+        "type" notification_type NOT NULL,
+        "device_id" TEXT NOT NULL,
+        "message" TEXT NOT NULL,
+        "created" time with time zone NOT NULL,
+        "read" BOOLEAN NOT NULL DEFAULT 'false',
+        CONSTRAINT fk_devices
+            FOREIGN KEY(device_id)
+                REFERENCES devices(device_id)
+                ON DELETE CASCADE
+    );
+    CREATE INDEX ON notifications (read);`
+  ]
+
+  db.multi(sql, next)
+}
+
+exports.down = function (next) {
+  next()
+}