How can I effectively utilize the Metamask SDK with TypeScript?

Currently, I am in the process of developing a webpack+pnpm+typescript+react website. All the versions being used are LTS and my preferred IDE is VSCode. According to the guide provided by Metamask here, it seems like I need to follow these steps:

npm i @metamask/sdk

After installing the SDK, the next step is to incorporate it into the project with the following code snippet:

import { MetaMaskSDK } from '@metamask/sdk';
const MMSDK = new MetaMaskSDK(options);
const ethereum = MMSDK.getProvider();

However, when I attempted to import the SDK using "import { MetaMaskSDK } from '@metamask/sdk'", I encountered an issue where there was no type hinting and received a warning message:

There was a problem locating a declaration file for module '@metamask/sdk'. It appears that the 'project/node_modules/.pnpm/@[email protected]_@Email me@[email protected][email protected]/node_modules/@metamask/sdk/dist/node/cjs/metamask-sdk.js' module implicitly has an 'any' type. You can try running 

npm i --save-dev @types/metamask__sdk
if available or create a new declaration (.d.ts) file containing declare module '@metamask/sdk';ts(7016)

To my knowledge, there doesn't seem to be any module declarations within the SDK's module folder. There are several subfolders like "browser/es" present instead. How should I correctly import the Metamask SDK into a web application?

typescriptmetamask

Answer №1

It appears that the creators of the SDK have encountered an issue with the building environment, causing an error in the package.json file for modules. This results in an incorrect path to the typing file being specified.

"types": "dist/browser/es/src/index.d.ts",

Instead, it should be:

"types": "dist/browser/es/sdk/src/index.d.ts",

I have reported this bug here, and the developers have assured me that they will address it. In the meantime, you can temporarily fix the issue by correcting the "types" value in the module's package.json file within the "node_modules/@metamsk/sdk/" directory.

While this workaround may solve the problem temporarily, updating the package will revert the changes, requiring you to repeat this process in each new build environment. I personally use pnpm as a package manager, allowing me to apply this fix across all my projects with just one modification.

I wanted to share this information to help others who might encounter the same issue. Despite spending some time troubleshooting, there does not seem to be any mention of this specific problem online. If there are any concerns about sharing this information, please feel free to let me know.

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