KresusConnect

Kresus connect SDK is built for Dapps to provide their users the ability to connect using Kresus Wallet and perform transactions. Kresus connect SDK also offers insta-wallet capability through which users can get a web3 wallet instantly.

1. Installing Kresus Connect

You can install Kresus Connect via yarn or NPM

Yarn Install

yarn add  @kresuslabs/kconnect

Npm Install

npm install @kresuslabs/kconnect

2. Obtain Project ID & Referral Id

Head over to WalletConnect Cloud to sign in or sign up. Create (or use an existing) project and copy its associated Project ID. We will need this in a later step.

Please email us at [email protected] with the projectId and other details to setup the referral id.

3. Setting up Kresus Connect SDK

This page describes how to set up the Kresus Connect SDK prerequisites

In order to develop properly with the kresus connect SDK you need the following A functional node project set up for local development Web3.js and @kresuslabs/kconnect installed using npm install web3 or similar A valid WalletConnect Project Id Initializing In your App.tsx file, add the following code to initialize Kresus Connect SDK and a Web3 object:

const projectId = '89b2f****************7f4cf'

const kconnect = await Kconnect.init({
  projectId: projectId,
  refid: referralId,
  metadata: {
    name: 'OpenSea',
    description: 'World’s largest NFT Marketplace',
    url: 'https://opensea.io/',
    icons: ['https://opensea.io/static/images/logos/opensea-logo.svg']
  }
})

4. Connect to wallet

In your App.tsx file, add the following code to display a QR code to users.

const session = await kconnect.connect({
    // Provide the namespaces and chains (e.g. `eip155` for EVM-based chains) we want to use in this session.
    requiredNamespaces: {
      eip155: {
        methods: [
          'eth_sendTransaction',
          'eth_signTransaction',
          'eth_sign',
          'personal_sign',
          'eth_signTypedData'
        ],
        chains: ['eip155:1'],
        events: ['chainChanged', 'accountsChanged']
      }
    }
  })

When the connect wallet button is pressed, kconnect.connect should be called, which initiates kresus Modal to take over and displays a QR code.

When the QR is successfully scanned by Kresus SuperApp Mobile app, a valid session would be established which can be checked using session.acknowledged

5. Displaying Wallet Address

const walletAddress = session.namespaces.eip155.accounts[0];

7. Switching between Chains

For switching networks, while establishing connection, all the supported chains should be added as optionalNamespaces

const chain = "eip155:179"
const methods = [
          'eth_sendTransaction',
          'eth_signTransaction',
          'eth_sign',
          'personal_sign',
          'eth_signTypedData'
        ]
const response = kconnect.switchNetwork(chain,methods)

8. Create Message Sign Request

 const handleSignMessage =  async () => {

const msg = "0x7468697320697320612074657374206d65737361676520746f206265207369676e6564"

const address = "0x1d85568eEAbad713fBB5293B45ea066e552A90De"

const param = [     ,
     msg,
     address
   ]


const result = await kconnect.request({
 topic: session.topic,
 chainId: 'eip155:1',
 request: {
   method: "personal_sign",
   params: param ,
   });   
} 

await handleSignMessage()

This will send the message to sign to the Kresus SuperApp

9. Create Tx Request

 const handleSendTransaction =  async () => {
   const tx = {
     from: walletAddress,
     to: "0xBDE1EAE59cE082505bB73fedBa56252b1b9C60Ce",
     data: "0x",
     gasPrice: "0x8BB2C97000",
     gasLimit: "0x5208",
     value: "0x0111",
   };

   const result = await kconnect.request({
     topic: session.topic,
     chainId: "eip155:1",
     request: {
       method: "eth_sendTransaction",
       params: [tx],
     },
   })
   console.log(result);
 }

await handleSendTransaction();

This example will create sample transaction and send to Kresus SuperApp to sign.