Building Error

[dmerniestic1987]

Ethers Version

5.7.2

Search Terms

fallback provider

Describe the Problem

We found a building error when using FallBackProvider. We can not build our project with different versions of ethers.js: 5.7.2, 5.7.1, 5.7.0 and 5.4.0 When running npm run build, it throws the following error:

node_modules/@ethersproject/providers/src.ts/base-provider.ts:1804:25 - error TS2365: Operator '>' cannot be applied to types 'number' and 'string | number'.

1804                     if (blockNumber > this._emitted.block) { return null; }

Code Snippet

export class FallbackProviderClient {
  private readonly settingsArray: CommonClientSettings[];
  private readonly web3: FallbackProvider;
  private readonly logger: Logger = new Logger(FallbackProviderClient.name);

  constructor(settings: CommonClientSettings[]) {
    this.settingsArray = settings;
    this.web3 = this.createFallBackProvider();
  }

  createFallBackProvider(): FallbackProvider {
    const fallBackProviderConfigs: FallbackProviderConfig[] =
      this.settingsArray.map((commonClientSettings) => {
        return {
          priority: commonClientSettings.priority,
          provider: RpcHelper.createJsonRpcProvider(commonClientSettings),
          weight: 1,
          stallTimeout: 6000,
        } as FallbackProviderConfig;
      });
    return new ethers.providers.FallbackProvider(fallBackProviderConfigs, 1);
  }
}

Contract ABI

No response

Errors

node_modules/@ethersproject/providers/src.ts/base-provider.ts:1804:25 - error TS2365: Operator '>' cannot be applied to types 'number' and 'string | number'.

1804                     if (blockNumber > this._emitted.block) { return null; }

Environment

node.js (v12 or newer)

Environment (Other)

No response

[ricmoo]

Are you using the correct TypeScript version (using npm install to install the locked version) and with the correct TypeScript settings? That part of the code hasn’t changed and at the time of each release the build worked, since the corresponding dist files were all created from the source. No published versions ever had build errors (as no emit is enabled).

[ricmoo]

This looks like you are trying to use an incompatible TS version, ignoring the Ethers tsconfig.

I recommend specifying skipLibCheck, since packages in node_modules can’t be expected to adhere to the tsconfig in the dependant package.

Does that make sense?

[dmerniestic1987]

@ricmoo "typescript": "^5.3.3" The same error is thrown in version ethers-js 6.10.0

[ricmoo]

The other opened issue is referencing v5 code. Not v6. You mean need to blow away your node_modules and package-lock, because there are definitely unrelated packages being pulled in. If in doubt, when looking in the node_modules, check the package.json within that folder. :)

[dmerniestic1987]

@ricmoo what is the typescript version recommended to version 5.7.2?

[ricmoo]

According to the package.json version 5.0.4. Also note that TypeScript does not follow semver so the following fact same version must be used.

This is also why skipLibCheck is highly recommended in general.

[dmerniestic1987]

Hi @ricmoo se used tyepscript 5.04 and skipLibCheck is true. It is the compilation error:

node_modules/@ethersproject/providers/src.ts/base-provider.ts:1233:27 - error TS2769: No overload matches this call.
  Overload 1 of 2, '(intervalId: string | number | Timeout): void', gave the following error.
    Argument of type 'Timer' is not assignable to parameter of type 'string | number | Timeout'.
      Property '[Symbol.dispose]' is missing in type 'Timer' but required in type 'Timeout'.
  Overload 2 of 2, '(id: number): void', gave the following error.
    Argument of type 'Timer' is not assignable to parameter of type 'number'.

1233             clearInterval(this._poller);
                               ~~~~~~~~~~~~

  node_modules/@types/node/timers.d.ts:130:17
    130                 [Symbol.dispose](): void;
                        ~~~~~~~~~~~~~~~~
    '[Symbol.dispose]' is declared here.
node_modules/@ethersproject/providers/src.ts/base-provider.ts:1250:27 - error TS2769: No overload matches this call.
  Overload 1 of 2, '(intervalId: string | number | Timeout): void', gave the following error.
    Argument of type 'Timer' is not assignable to parameter of type 'string | number | Timeout'.
  Overload 2 of 2, '(id: number): void', gave the following error.
    Argument of type 'Timer' is not assignable to parameter of type 'number'.

1250             clearInterval(this._poller);
                               ~~~~~~~~~~~~

node_modules/@ethersproject/providers/src.ts/base-provider.ts:1804:25 - error TS2365: Operator '>' cannot be applied to types 'number' and 'string | number'.

1804                     if (blockNumber > this._emitted.block) { return null; }
                             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
node_modules/@ethersproject/providers/src.ts/fallback-provider.ts:132:30 - error TS2769: No overload matches this call.
  Overload 1 of 2, '(timeoutId: string | number | Timeout): void', gave the following error.
    Argument of type 'Timer' is not assignable to parameter of type 'string | number | Timeout'.
  Overload 2 of 2, '(id: number): void', gave the following error.
    Argument of type 'Timer' is not assignable to parameter of type 'number'.

132                 clearTimeout(timer);
                                 ~~~~~

tsconfig

{
  "compilerOptions": {
    "module": "commonjs",
    "declaration": true,
    "removeComments": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "allowSyntheticDefaultImports": true,
    "target": "ES2021",
    "sourceMap": true,
    "outDir": "./dist",
    "baseUrl": "./",
    "incremental": true,
    "skipLibCheck": true,
    "strictNullChecks": false,
    "noImplicitAny": false,
    "strictBindCallApply": false,
    "forceConsistentCasingInFileNames": false,
    "noFallthroughCasesInSwitch": false,
    "esModuleInterop": true
  }
}

package.json dependencies

 "dependencies": {
    "@nestjs/axios": "^3.0.0",
    "@nestjs/cache-manager": "^2.1.0",
    "@nestjs/common": "^10.0.0",
    "@nestjs/core": "^10.0.0",
    "@nestjs/microservices": "^10.1.0",
    "@nestjs/platform-express": "^10.0.0",
    "@nestjs/schedule": "^3.0.1",
    "@nestjs/swagger": "^7.0.12",
    "@nestjs/terminus": "^10.1.1",
    "@nestjs/typeorm": "^10.0.2",
    "@nestjs/websockets": "^10.0.3",
    "axios": "^1.4.0",
    "cache-manager": "^5.2.4",
    "class-transformer": "^0.5.1",
    "class-validator": "^0.14.0",
    "config": "^3.3.9",
    "crypto-js": "^4.1.1",
    "dd-trace": "^3.17.1",
    "dotenv": "^16.3.1",
    "ethers": "^5.7.2",
    "mysql2": "^3.4.3",
    "reflect-metadata": "^0.1.13",
    "rxjs": "^7.8.1",
    "typeorm": "^0.3.17"
  },
    "devDependencies": {
    "@nestjs/cli": "^10.0.0",
    "@nestjs/schematics": "^10.0.0",
    "@nestjs/testing": "^10.0.0",
    "@types/express": "^4.17.17",
    "@types/jest": "^29.5.2",
    "@types/node": "^20.3.1",
    "@types/supertest": "^2.0.12",
    "@typescript-eslint/eslint-plugin": "^6.21.0",
    "@typescript-eslint/parser": "^6.21.0",
    "eslint": "^8.42.0",
    "eslint-config-prettier": "^9.1.0",
    "eslint-plugin-prettier": "^5.1.3",
    "jest": "^29.7.0",
    "prettier": "^3.2.5",
    "source-map-support": "^0.5.21",
    "supertest": "^6.3.4",
    "ts-jest": "^29.1.2",
    "ts-loader": "^9.5.1",
    "ts-node": "^10.9.2",
    "tsconfig-paths": "^4.2.0",
    "typescript": "5.0.4"
  },

[ricmoo]

You will need the @types/node dependency included and possibly add node to the libs in the tsconfig.json.

[dmerniestic1987]

Hi @ricmoo thanks! But it did not work.

I used node libs and the @types/node but no success result found. Do you see any mistake in the tsconfig?

"@types/node": "^20.11.16",

node_modules/@ethersproject/providers/src.ts/base-provider.ts:1233:27 - error TS2345: Argument of type 'Timer' is not assignable to parameter of type 'string | number | Timeout'.
  Property '[Symbol.dispose]' is missing in type 'Timer' but required in type 'Timeout'.

1233             clearInterval(this._poller);
                               ~~~~~~~~~~~~

  node_modules/@types/node/timers.d.ts:130:17
    130                 [Symbol.dispose](): void;
                        ~~~~~~~~~~~~~~~~
    '[Symbol.dispose]' is declared here.
node_modules/@ethersproject/providers/src.ts/base-provider.ts:1250:27 - error TS2345: Argument of type 'Timer' is not assignable to parameter of type 'string | number | Timeout'.

1250             clearInterval(this._poller);
                               ~~~~~~~~~~~~
node_modules/@ethersproject/providers/src.ts/base-provider.ts:1804:25 - error TS2365: Operator '>' cannot be applied to types 'number' and 'string | number'.

1804                     if (blockNumber > this._emitted.block) { return null; }
                             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
node_modules/@ethersproject/providers/src.ts/fallback-provider.ts:132:30 - error TS2345: Argument of type 'Timer' is not assignable to parameter of type 'string | number | Timeout'.

132                 clearTimeout(timer);

Current tsconfig

{
  "compilerOptions": {
    "module": "commonjs",
    "declaration": true,
    "removeComments": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "allowSyntheticDefaultImports": true,
    "target": "ES2022",
    "sourceMap": true,
    "outDir": "./dist",
    "baseUrl": "./",
    "incremental": true,
    "skipLibCheck": true,
    "strictNullChecks": false,
    "noImplicitAny": false,
    "strictBindCallApply": false,
    "forceConsistentCasingInFileNames": false,
    "noFallthroughCasesInSwitch": false,
    "esModuleInterop": true,
    "moduleResolution": "node16",
    "lib": [
      "es2020",
      "es5",
      "node"
    ]
  }
}

[timophey01]

Have same problem. Did you find any fix or workaround?