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https://github.com/wevm/mipd

TypeScript Utilities for EIP-6963: Multi Injected Provider Discovery
https://github.com/wevm/mipd

eip6963 ethereum typescript wallets

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TypeScript Utilities for EIP-6963: Multi Injected Provider Discovery

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README 

          






    

      

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  TypeScript Utilities for EIP-6963: Multi Injected Provider Discovery




## Contents



- [Install](#install)

- [Store](#store)

- [Utilities](#utilities)

  - [`requestProviders`](#requestproviders)

  - [`announceProvider`](#announceprovider)

- [`window` Type Polyfill](#window-polyfill)

- [Types](#types)

- [Configuration](#configuration)



## Install



```bash

npm i mipd

```



```bash

pnpm add mipd

```



```bash

yarn add mipd

```



## Store



The MIPD Store stores the Providers that have been emitted by a Wallet (or other source), and provides a way to subscribe to the store and retrieve the Providers.



### Overview



```ts

import { createStore } from 'mipd'



// Set up a MIPD Store, and request Providers.

const store = createStore()



// Subscribe to the MIPD Store.

store.subscribe(providerDetails => {

  console.log(providerDetails)

  // => [EIP6963ProviderDetail, EIP6963ProviderDetail, ...]

})



// Retrieve emitted Providers.

store.getProviders()

// => [EIP6963ProviderDetail, EIP6963ProviderDetail, ...]



// Find a Provider Detail.

store.findProvider({ rdns: 'com.example' })

// => EIP6963ProviderDetail | undefined



// Clear the store, including all Providers.

store.clear()



// Reset the store, and emit an event to request Providers.

store.reset()



// Destroy the store, and remove all Providers and event listeners.

store.destroy()

```



### Usage



#### Vanilla JS



```tsx

import { createStore } from 'mipd'



const store = createStore()



let providers = store.getProviders()

store.subscribe(providerDetails => (providers = providerDetails))

```



#### React



```tsx

import { useSyncExternalStore } from 'react'

import { createStore } from 'mipd'



const store = createStore()



function Example() {

  const providers = useSyncExternalStore(store.subscribe, store.getProviders)

  // ...

}

```



#### Svelte



```html



  import { readable } from 'svelte/store'

  import { createStore } from 'mipd'

  

  const store = createStore()

  const providers = readable(store.getProviders(), store.subscribe)



```



#### Vue



```html



  import { reactive } from 'vue'

  import { createStore } from 'mipd'



  const store = createStore()

  const state = reactive({ providers: store.getProviders() })

  store.subscribe(providers => (state.providers = providers))



```



### API



#### createStore()



Creates a MIPD Store, and emits an event to request Providers from the Wallet(s).



```ts

const store = createStore()

```



#### store.subscribe(listener, args)



Subscribes to the MIPD Store, and returns a function to unsubscribe.



```ts

const unsubscribe = store.subscribe(providers => {

  console.log(providers)

  // => [EIP6963ProviderDetail, EIP6963ProviderDetail, ...]

})

```



**Definition**



```ts

export type Listener = (

  // The updated Providers store.

  providerDetails: EIP6963ProviderDetail[],

  meta?: {

    // The Providers that were added to the store.

    added?: EIP6963ProviderDetail[]

    // The Providers that were removed from the store.

    removed?: EIP6963ProviderDetail[]

  },

) => void



function subscribe(

  // The listener function.

  listener: Listener, 

  args?: { 

    // If `true`, the listener will be called immediately with the stored Providers.

    emitImmediately?: boolean 

  }

): () => void // Returns an unsubscribe function.

```



#### store.getProviders()



Returns the current Providers.



```ts

const providers = store.getProviders()

// => [EIP6963ProviderDetail, EIP6963ProviderDetail, ...]

```



**Definition**



```ts

function getProviders(): EIP6963ProviderDetail[]

```



#### store.findProvider(args)



Finds a provider detail by its RDNS (Reverse Domain Name Identifier).



```ts

const provider = store.findProvider({ rdns: 'com.example' })

```



**Definition**



```ts

function findProvider(args: { 

  // The RDNS of the Provider Detail to find.

  rdns: string 

}): EIP6963ProviderDetail | undefined

```



#### store.clear()



Clears the store, including all Providers.



```ts

store.clear()

```



**Definition**



```ts

function clear(): void

```



#### store.reset()



Resets the store, and emits an event to request Providers from the Wallet(s).



```ts

store.reset()

```



**Definition**



```ts

function reset(): void

```



#### store.destroy()



Destroys the store, and removes all Providers and event listeners.



```ts

store.destroy()

```



**Definition**



```ts

function destroy(): void

```



## Utilities



### requestProviders



The `requestProviders` utility emits an event to request Providers from the Wallet(s). It returns an `unsubscribe` function to clean up event listeners.



```ts

import { requestProviders } from 'mipd'



let providers = []



const unsubscribe = requestProviders(providerDetail => providers.push(providerDetail))

```



**Definition**



```ts

function requestProviders(

  // The listener.

  listener: (providerDetail: EIP6963ProviderDetail) => void

// Unsubscribe function to clean up the listener.

): () => void

```



### announceProvider



The `announceProvider` utility emits an event to announce a Provider to the Wallet(s), and also listen for incoming requests. It returns an `unsubscribe` function to clean up event listeners.



```ts

import { announceProvider } from 'mipd'



const unsubscribe = announceProvider({

  info: {

    icon: 'data:image/svg+xml,',

    name: 'Example',

    rdns: 'com.example',

    uuid: '00000000-0000-0000-0000-000000000000'

  },

  provider: new EIP1193Provider()

})

```



**Definition**



```ts

function requestProviders(

  // The EIP-1193 Provider and Provider Info.

  detail: EIP6963ProviderDetail

// Unsubscribe function to clean up the listener.

): () => void

```



## `window` Polyfill



By importing the `mipd/window` Polyfill, the types on `window.addEventListener` will be inferred to include the `EIP6963AnnounceProviderEvent` and `EIP6963RequestProviderEvent` types.



```ts

import 'mipd/window'



window.addEventListener(

  'eip6963:announceProvider'

  // ^? 'eip6963:announceProvider' | 'eip6963:requestProvider' | 'click' | ...



  event => {

  // ^? EIP6963AnnounceProviderEvent



    event.type

    //    ^? 'eip6963:announceProvider'

    event.detail

    //    ^? EIP6963ProviderDetail

    event.detail.info

    //           ^? EIP6963ProviderInfo

    event.detail.provider

    //           ^? EIP1193Provider

  }

)



window.addEventListener(

  'eip6963:requestProvider'

  // ^? 'eip6963:announceProvider' | 'eip6963:requestProvider' | 'click' | ...



  event => {

  // ^? EIP6963RequestProviderEvent



    event.type

    //    ^? 'eip6963:requestProvider'

  }

)

```



## Types



### EIP6963ProviderDetail



Event detail from `eip6963:announceProvider`.



#### Import



```ts

import { type EIP6963ProviderDetail } from 'mipd'

```



#### Definition



```ts

export interface EIP6963ProviderDetail {

  info: EIP6963ProviderInfo

  provider: TProvider

}

```



### EIP6963ProviderInfo



Metadata of the EIP-1193 Provider.



#### Import



```ts

import { type EIP6963ProviderInfo } from 'mipd'

```



#### Definition



```ts

export interface EIP6963ProviderInfo {

  icon: string

  name: string

  rdns?: ... | (string & {})

  uuid: string

}

```



### EIP6963AnnounceProviderEvent



Event type to announce an EIP-1193 Provider.



#### Import



```ts

import { type EIP6963AnnounceProviderEvent } from 'mipd'

```



#### Definition



```ts

export interface EIP6963AnnounceProviderEvent

  extends CustomEvent> {

  type: 'eip6963:announceProvider'

}

```



### EIP6963RequestProviderEvent



Event type to request EIP-1193 Providers.



#### Import



```ts

import { type EIP6963RequestProviderEvent } from 'mipd'

```



#### Definition



```ts

export interface EIP6963RequestProviderEvent extends Event {

  type: 'eip6963:requestProvider'

}

```



## Configuration



In some cases you might want to tune the global types (e.g. the `EIP1193Provider`). To do this, the following configuration options are available:



| Type                | Default                                                        | Description            |

| ------------------- | -------------------------------------------------------------- | ---------------------- |

| `provider`          | `import('viem').EIP1193Provider`                               | The EIP-1193 Provider. |

| `rdns`              | `'com.coinbase' \| 'com.enkrypt' \| 'io.metamask' \| 'io.zerion' \| (string & {})` | Deterministic identifier for the Provider in the form of an rDNS (Reverse Domain Name Notation) |



Configuration options are customizable using [declaration merging](https://www.typescriptlang.org/docs/handbook/declaration-merging.html). Extend the `Register` interface either directly in your code or in a `d.ts` file (e.g. `eip6963.d.ts`):



```ts

import { type EIP1193Provider } from './eip1193-provider'



declare module 'mipd' {

  interface Register {

    provider: EIP1193Provider

  }

}

```



## Authors



- [@jxom](https://github.com/jxom) (jxom.eth, [Twitter](https://twitter.com/jakemoxey))

- [@tmm](https://github.com/tmm) (awkweb.eth, [Twitter](https://twitter.com/awkweb))



## License



[MIT](/LICENSE) License