TypeScript errors on Firebase Admin v12.0.0

[petrvecera]

After update to firebase admin 12.0.0. we are unable to build any of our Firebase functions projects. We don't have problems on 11.11.1. As reported here on the forums https://github.com/firebase/firebase-admin-node/discussions/2411

The typescript errors come from inside the firebase libraries.

Env:

• Node 20
• Windows & Mac
• TypeScript 5.3.3

../../node_modules/firebase-functions/lib/common/providers/database.d.ts:80:5 - error TS2416: Property 'child' in type 'DataSnapshot' is not assignable to the same property in base type 'DataSnapshot'.
  Type '(childPath: string) => DataSnapshot' is not assignable to type '(path: string) => DataSnapshot'.
    Call signature return types 'DataSnapshot' and 'DataSnapshot' are incompatible.
      The types of 'forEach' are incompatible between these types.
        Type '(action: (a: DataSnapshot) => boolean | void) => boolean' is not assignable to type '(action: (a: IteratedDataSnapshot) => boolean | void) => boolean'.
          Types of parameters 'action' and 'action' are incompatible.
            Types of parameters 'a' and 'a' are incompatible.
              Type 'DataSnapshot' is not assignable to type 'IteratedDataSnapshot'.
                Types of property 'key' are incompatible.
                  Type 'string | null' is not assignable to type 'string'.
                    Type 'null' is not assignable to type 'string'.

80     child(childPath: string): DataSnapshot;
       ~~~~~

../../node_modules/firebase-functions/lib/common/providers/database.d.ts:100:5 - error TS2416: Property 'forEach' in type 'DataSnapshot' is not assignable to the same property in base type 'DataSnapshot'.
  Type '(action: (a: DataSnapshot) => boolean | void) => boolean' is not assignable to type '(action: (a: IteratedDataSnapshot) => boolean | void) => boolean'.

100     forEach(action: (a: DataSnapshot) => boolean | void): boolean;
        ~~~~~~~


Found 2 errors in the same file, starting at: ../../node_modules/firebase-functions/lib/common/providers/database.d.ts:80

Additional info for the deps in project:

 "dependencies": {
    "@google-cloud/storage": "7.7.0",
    "axios": "1.6.2",
    "axios-retry": "4.0.0",
    "cors": "2.8.5",
    "date-fns": "2.30.0",
    "express": "4.18.2",
    "express-validator": "7.0.1",
    "firebase-admin": "12.0.0",
    "firebase-functions": "4.6.0",
    "firestore-size": "2.0.7",
    "lodash": "4.17.21",
  },
  "devDependencies": {
    "@types/cors": "2.8.17",
    "@types/express": "4.17.21",
    "@types/jest": "29.5.11",
    "@types/lodash": "4.14.202",
    "@types/node": "20.11.10",
    "@typescript-eslint/eslint-plugin": "6.13.1",
    "@typescript-eslint/parser": "6.13.1",
    "eslint": "8.55.0",
    "eslint-config-google": "0.14.0",
    "eslint-plugin-import": "2.29.0",
    "firebase-functions-test": "3.1.0",
    "jest": "29.7.0",
    "ts-jest": "29.1.1",
    "typescript": "5.3.3"
  }

Workaround: In your tsconfig.json setup:

  "compilerOptions": {
    "skipLibCheck": true,
  },

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[jibril101]

any updates on this?

[delebakare]

Any solution yet. This is affecting deployment

[lahirumaramba]

This should be fixed in the latest release. If you are still facing this issue, we can reopen later.