Fixing '@subsquid/substrate-runtime' Module Errors

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Hey guys,

So, you've run into a bit of a snag while building your project, specifically with those pesky TypeScript errors saying it can't find the @subsquid/substrate-runtime module. No worries, it happens! Let’s break down what's going on and how to fix it. These errors usually pop up when the TypeScript compiler can't locate the necessary type definitions or modules that your code relies on. In this case, it’s all about the @subsquid/substrate-runtime package. When dealing with TypeScript projects, especially those using external libraries, ensuring that all dependencies are correctly installed and that the TypeScript compiler knows where to find them is super important.

Understanding the Error

The error message Cannot find module '@subsquid/substrate-runtime' indicates that the TypeScript compiler is unable to locate the specified module. This can occur due to several reasons, such as the module not being installed, incorrect import paths, or issues with the TypeScript configuration.

Reproducing the Error

The error arises in the src/types/support.ts file, where modules from @subsquid/substrate-runtime are imported. Specifically, the imports are:

import type {BitSequence, Bytes, QualifiedName, Runtime} from '@subsquid/substrate-runtime'
import * as sts from '@subsquid/substrate-runtime/lib/sts'
import {Option, Result} from '@subsquid/substrate-runtime/lib/sts'

Environment Details

Before diving into solutions, let’s ensure we have a clear picture of your environment:

  • Node.js version: 18.2
  • npm version: 10.8.2, yarn version: 1.22.22
  • OS version: Debian 6.12.41-1

Knowing these details helps in troubleshooting any compatibility issues that might arise.

Potential Solutions

Alright, let's get this show on the road and fix these errors. Here are a few proven methods to tackle this issue. I will walk you through these solutions step by step so you can get back to coding without a hitch.

1. Install the Missing Module

  • Why this works: The most common reason for this error is that the @subsquid/substrate-runtime package isn't installed in your project. Installing it makes the module available for TypeScript to find.

  • How to do it:

    Open your terminal and navigate to your project directory (joystream-fees-squid). Then, run one of the following commands:

    yarn add @subsquid/substrate-runtime

    or, if you prefer npm:

    npm install @subsquid/substrate-runtime

    This command adds the @subsquid/substrate-runtime package to your project's node_modules directory and updates your package.json file.

2. Verify Installation

  • Why this works: Sometimes, the installation might seem successful, but something could have gone wrong. Verifying ensures the package is indeed present.

  • How to do it:

    Check your node_modules directory to see if @subsquid/substrate-runtime exists. You can also check your package.json file under dependencies to confirm it's listed there.

    "dependencies": {
    "@subsquid/substrate-runtime": "^x.x.x",
    ...
}

    Replace ^x.x.x with the actual version number that was installed.

3. Check TypeScript Configuration

  • Why this works: TypeScript needs to know how to resolve modules. Incorrect configuration can lead to it not finding installed packages.

  • How to do it:

    Make sure your tsconfig.json file is correctly configured. Here’s a basic setup that usually works:

    {
  "compilerOptions": {
    "module": "commonjs",
    "esModuleInterop": true,
    "target": "es6",
    "moduleResolution": "node",
    "sourceMap": true,
    "outDir": "lib",
    "baseUrl": ".",
    "paths": {
      "@subsquid/substrate-runtime": ["./node_modules/@subsquid/substrate-runtime"]
    }
  },
  "include": ["src/**/*"]
}

    Key points:

    • module: Set to commonjs or esnext.
    • moduleResolution: Set to node to use Node.js module resolution.
    • baseUrl and paths: These help TypeScript resolve modules, especially if they are located in non-standard locations.

4. Clear Cache and Reinstall

  • Why this works: Sometimes, cached or corrupted packages can cause issues. Clearing the cache and reinstalling ensures a clean slate.

  • How to do it:

    First, clean the yarn cache:

    yarn cache clean

    Or, for npm:

    npm cache clean --force

    Then, remove your node_modules directory and reinstall:

    rm -rf node_modules
yarn install

    Or, with npm:

    rm -rf node_modules
npm install

5. Verify Import Paths

  • Why this works: Incorrect import paths can lead to TypeScript not finding the module, even if it's installed.

  • How to do it:

    Double-check your import statements in src/types/support.ts to ensure they match the structure of the @subsquid/substrate-runtime package. From the error message, these seem correct, but it's always good to verify:

    import type {BitSequence, Bytes, QualifiedName, Runtime} from '@subsquid/substrate-runtime';
import * as sts from '@subsquid/substrate-runtime/lib/sts';
import {Option, Result} from '@subsquid/substrate-runtime/lib/sts';

6. Check for Version Compatibility

  • Why this works: Sometimes, a package might not be compatible with your current Node.js or TypeScript version.

  • How to do it:

    Check the @subsquid/substrate-runtime documentation for any specific version requirements. Ensure your Node.js and TypeScript versions meet those requirements. You can update Node.js using nvm:

    nvm install 18.2
nvm use 18.2

    And update TypeScript globally or locally:

    npm install -g typescript
# or
npm install typescript --save-dev

7. Examine yarn.lock or package-lock.json

  • Why this works: These files ensure that the correct versions of your dependencies are installed. Conflicts or corruption in these files can lead to issues.

  • How to do it:

    Check your yarn.lock or package-lock.json file for any anomalies or conflicts. Sometimes, deleting the lock file and reinstalling dependencies can resolve issues:

    rm yarn.lock # or package-lock.json
rm -rf node_modules
yarn install # or npm install

Final Thoughts

Alright, that’s a wrap! By methodically going through these steps, you should be able to resolve the Cannot find module '@subsquid/substrate-runtime' error. Remember, the key is to ensure the module is installed, TypeScript knows where to find it, and there are no conflicting versions or cached issues. Happy coding, and feel free to reach out if you hit any more snags!