# Wallet Integration

This article provides a guide for integrating the SDK into a wallet app. The following topics will be discussed here:

• Handle wallet related tasks
• Checking the verification status of an address
• Starting the verification flow

The SDK requires that it has access to wallet related data and functions. The BaseWalletSession abstract class describes a communication session with your wallet, where these function and data requirements are defined. You have to inherit from this abstract class and provide an implementation of the signing and minting functions.

abstract personalSign(walletAddress: string, message: string): Promise<string>

In the implementation of this function your wallet is expected to sign a message (for EVM chains use the personal_sign call), with the given wallet address. The return value of this function should be the signed message.

abstract sendMintingTransaction(walletAddress: string, mintingProperties: MintingProperties): Promise<MintingTransactionResult>

In the implementation of this function your wallet is expected to send a transaction (for EVM chains use eth_sendTransaction call), with the given wallet address using the minting properties. Returns the transaction hash wrapped in a MintingTransactionResult class.

You have to pass your BaseWalletSession object to VerificationManager.hasValidToken(verificationType:walletAddress:walletSession:) along with a wallet address and verification type.

let hasValidToken = await VerificationManager.getInstance()
    .hasValidToken(
        VerificationType.KYC,
        walletAddress,
        walletSession
    )

When you already have the chain information of the user's wallet, you can use a chain id in CAIP-2 format format to check for a valid token.

const chainId = "eip155:80001"
let hasValidToken = await VerificationManager.getInstance()
    .hasValidToken(
        VerificationType.KYC,
        walletAddress,
        chainId
    )

First you need to have an instance of an object you created at the ‘Inheriting from BaseWalletSession’ section. Once you obtained your wallet session instance, pass it along with a wallet address to createSession(walletAddress: string, walletSession: BaseWalletSession)

let walletSession : BaseWalletSession = ... // Create an instance of your BaseWalletSession’ implementation
let verificationSession = await VerificationManager.getInstance()
    .createSession(walletAddress!, walletSession);