Portal Connect utilizes your existing Portal instance to connect your Portal MPC Wallet to dApps via WalletConnect. When connecting via Portal Connect, a few things happen in the background:
  1. You provide a WalletConnect uri for Portal Connect to connect with
  2. Portal Connect opens a WebSocket connection to the WalletConnect uri
  3. All requests received over the WebSocket are routed to portal.provider to perform the request like normal
This workflow allows for seamless integration between your Portal MPC Wallet and countless dApps that already include support for WalletConnect.

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Installing

In order to use Portal Connect, you’ll need to install the @portal-hq/connect package in your project. 
yarn add @portal-hq/connect
This package does not negate the need to install other Portal dependencies, namely @portal-hq/core. Portal Connect depends on an existing Portal instance to operate properly.

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Initializing

To initialize Portal Connect, import and create an instance of PortalConnect. The PortalConnect class takes one argument, the Portal instance you’d like it to use under the hood. 
import { useEffect, useState } from 'react'
import { usePortal } from '@portal-hq/core'
import PortalConnect from '@portal-hq/connect'

const ConnectScreen = () => {
    // This assumes that you are utilizing the
    // `PortalContextProvider` within your app
    const portal = usePortal()
    const [portalConnect, setPortalConnect] = useState<PortalConnect>()

    useEffect(() => {
        if (portal) {
            const portalConnect = PortalConnect(portal)
            setPortalConnect(portalConnect)
        }
    }, [portal])

    return (
        <>
            {/** The content of your view goes here */}
        </>
    )
}

export default ConnectScreen

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Connecting via WalletConnect

To connect to a WalletConnect URI, using the mechanism that makes the most sense for your app, capture the WalletConnect URI. The most common practice is to use a QR Code scanner for this. Once you’ve captured the URI, you can call the connect(uri) function on your PortalConnect instance. This will initialize the WebSocket session with the WalletConnect relay and begin passing messages to your Portal Provider using your Portal MPC Wallet. 
const [uri, setUri] = useState<string>('')

// ...

const handleConnect = async () => {
    if (uri.length > 0) {
        await portalConnect.connect(uri)
    }
}

// ...

return (
    <>
        {/**
            This is an example of how a QR Code scanner might work.
            Once you've chosen a QR Code scanner library, please
            refer to the docs for that library for details on how to
            implement components and capture scanned values.
        */}
        <QRCodeScanner onQrCode={(text) => setUri(text)} />
        <Button onPress={handleConnect} title="Connect" />
    </>
)
Listen for the connect and disconnect events to get confirmation of connecting and disconnecting. 
connect.on('connect', (event: Record<string, any>) => { }

connect.on('disconnect', (event: Record<string, any>) => { }
Once this is done, you’ve got a connection to WalletConnect. All messages sent by the relay will now be processed by the Portal Provider.
Wallet Connect’s Auth API is not currently supported. We have it on our roadmap. Please reach out if this is an urgent feature request.

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Handling Session Requests

Session Requests represent the initial connection request from the dApp to create a new session. These are triggered when Portal responds to the dApp after the connect(uri) function is called. These events will be triggered with a SessionProposal object. These objects can be used to display information about the dApp the user is connecting to and the specific permissions being requested by the dApp.

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Accepting the dApps proposal

We have a helper method addChainsToProposal . This can be used to add all the chains in your gateway config to the proposal object.

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Binding to Session Requests

In order to bind to Session Requests, add an event handler to your PortalConnect instance. 
connect.on('portal_dappSessionRequested', (data: SessionProposalOrMetadata) => {
    // ... your business logic

    if (approved) {
        data = connector.addChainsToProposal(data)
        connect.emit('portal_dappSessionApproved', data)
    } else {
        connect.emit('portal_dappSessionRejected', data)
    }
})

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Handle Signing

Each portal connect instance gets created with its own instance of the Portal Provider. This allows users to connect with different chains to different dApps.

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Listen for signing events

Handle signing approval. This is only required if autoApprove is turned off. 
connect.on('portal_signingRequested', (data: SigningRequestArguments) => { }
Listen for confirmation of signing requests 
connect.on('portal_signatureReceived', () => { }

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Handle Warnings and Errors

Set up a listener for portal_connectError in order to handle specific errors and warnings from Portal Connect. Check out our Portal Connect Error Codes here.

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Switching Chains

In order to switch the active chain for a portal connect instance use the setChainId method.
You must include that chainId in the gateway config with a gateway url on initialization of your Portal Object, otherwise, you can not switch chains.
connect.setChainId(137) // switches the active chain to polygon mainnet

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The final file

Once you’ve gone through that process, you should have a file that looks something like this. 
import { useEffect, useState } from 'react'
import { usePortal } from '@portal-hq/core'
import PortalConnect from '@portal-hq/connect'

const ConnectScreen = () => {
    // This assumes that you are utilizing the
    // `PortalContextProvider` within your app
    const portal = usePortal()
    const [portalConnect, setPortalConnect] = useState<PortalConnect>()
    const [uri, setUri] = useState<string>('')

    const handleConnect = async () => {
        if (uri.length > 0) {
            await portalConnect.connect(uri)
        }
    }

    useEffect(() => {
        if (portal) {
            const portalConnect = PortalConnect(portal)
            setPortalConnect(portalConnect)
        }

        connect.on('portal_dappSessionRequested', (data: SessionProposalOrMetadata) => {
            // ... your business logic

            if (approved) {
                connect.emit('portal_dappSessionApproved', data)
            } else {
                connect.emit('portal_dappSessionRejected', data)
            }
        })

    }, [portal])

    return (
        <>
            {/**
                This is an example of how a QR Code scanner might work.
                Once you've chosen a QR Code scanner library, please
                refer to the docs for that library for details on how to
                implement components and capture scanned values.
            */}
            <QRCodeScanner onQrCode={(text) => setUri(text)} />
            <Button onPress={handleConnect} title="Connect" />
        </>
    )
}

export default ConnectScreen