MetaMask
MetaMask Inpage Provider
The inpage Ethereum provider object injected by MetaMask into web pages. Contains a lot of implementation details specific to MetaMask, and is probably not suitable for out-of-the-box use with other wallets.
Implements the Ethereum JavaScript provider specification, EIP-1193.
Installation
yarn add @metamask/inpage-provider
Usage
import { initializeProvider } from '@metamask/inpage-provider'
// Create a stream to a remote provider:
const metamaskStream = new LocalMessageDuplexStream({
name: 'inpage',
target: 'contentscript',
})
// this will initialize the provider and set it as window.ethereum
initializeProvider({
connectionStream: metamaskStream,
})
const { ethereum } = windowTypes
Types are exposed at index.d.ts.
They require Node.js EventEmitter and Duplex stream types, which you can grab from e.g. @types/node.
Do Not Modify the Provider
The Provider object should not be mutated by consumers under any circumstances. The maintainers of this package will neither fix nor take responsbility for bugs caused by third parties mutating the provider object.