unstable_connector

The unstable_connector Transport connects to a JSON-RPC API via the provided Connector.

For example, if the provided Connector is injected and the end-user uses MetaMask, then outgoing JSON-RPC requests will be sent via the MetaMask EIP-1193 Provider (window.ethereum).

Import

import { unstable_connector } from '@wagmi/core'

Usage

import { 
  createConfig, 
  fallback,
  unstable_connector,
} from '@wagmi/core'
import { mainnet } from '@wagmi/core/chains'

export const config = createConfig({
  chains: [mainnet],
  connectors: [injected()],
  transports: {
    [mainnet.id]: fallback([
      unstable_connector(injected), 
      http('https://eth-mainnet.g.alchemy.com/v2/...')
    ])
  },
})

WARNING

It is highly recommended to use the unstable_connector Transport inside of a fallback Transport. This ensures that if the Connector request fails, the Transport will fall back to a different Transport in the fallback set.

Some common cases for a Connector request to fail are:

• Chain ID mismatches,
• Connector RPC not supporting the requested method and/or only supporting a subset of methods for connected accounts,
• Rate-limiting of Connector RPC.

Parameters

connector

Connector

The Connector to use for the Transport.

import { unstable_connector } from 'wagmi'
import { safe } from 'wagmi/connectors'

const transport = unstable_connector(safe)

key (optional)

string

A key for the Transport. Defaults to "connector".

import { unstable_connector } from 'wagmi'
import { injected } from 'wagmi/connectors'

const transport = unstable_connector(injected, { 
  key: 'injected',  
})

name (optional)

string

A name for the Transport. Defaults to "Connector".

import { unstable_connector } from 'wagmi'
import { injected } from 'wagmi/connectors'

const transport = unstable_connector(injected, { 
  name: 'Injected',  
})

retryCount (optional)

number

The max number of times to retry when a request fails. Defaults to 3.

import { unstable_connector } from 'wagmi'
import { injected } from 'wagmi/connectors'

const transport = unstable_connector(injected, {
  retryCount: 5, 
})

retryDelay (optional)

number

The base delay (in ms) between retries. By default, the Transport will use exponential backoff (~~(1 << count) * retryDelay), which means the time between retries is not constant.

import { unstable_connector } from 'wagmi'
import { injected } from 'wagmi/connectors'

const transport = unstable_connector(injected, {
  retryDelay: 100, 
})