Wallet Provider

Initiate SDK

1. Initialize SDK via clientId and Get WalletProvider

import DappPortalSDK from '@linenext/dapp-portal-sdk'
 
const sdk = await DappPortalSDK.init({ clientId: '<CLIENT_ID>' });
const provider = sdk.getWalletProvider()

Initialize SDK as below code if you want to connect testnet. (Default of chainId is '8217', mainnet)

const sdk = await DappPortalSDK.init({
  clientId: '<CLIENT_ID>',
  chainId: '1001',
});

Connect Wallet

1. Initiate SDK

2. Verify the address of the connected wallet via sending kaia_requestAccounts request to the wallet. In this process, Users can see a screen to select the type of wallet and check whether wallet is connected.

const accounts = await provider.request({ method: 'kaia_requestAccounts' });
const accountAddress = accounts[0]

2. Create message to get sign from user

const message = 'Welcome to Mini Dapp';

3. Request a message signature to verify the ownership of the Address.

const signature = await provider.request({method: 'personal_sign', params: [message, accountAddress]});

Send Transaction

1. Initiate SDK

2. It creates a transaction that requires the user’s signature. At this time, the address in from must be matched with address in the wallet connected in the previous step.

const tx = {
  from: accountAddress,
  to: '0xBBBBBBBBBBBB',
  value: '10',
  gas: '21000',
};

4. Request kaia_sendTransaction to connected Wallet. Pop up will be opened for verifying transaction to sign in this step. If success, Transaction hash will be returned.

const txHash = await provider.request({method: 'kaia_sendTransaction', params: [tx]});

class WalletProvider

WalletProvider provides compatible interface with EIP-1193 which can easily link Dapp Portal Wallet and various Kaia Wallets.

The list of wallets which can be integrated via WalletProvider is below if users use web browser.

• Dapp Portal Wallet (Web)

• Kaia Wallet (Mobile App)

• Kaia Wallet (Chrome Extenstion) ; if Kaia Wallet extension is installed on browser.

WalletProvider choose Dapp Portal Wallet (LIFF) automatically if user uses LINE Messenger.

a. getWalletType(): WalletType | null

It returns wallet type which is connected.

• null : Status before wallet is connected.

• WalletType.Web : Status wallet is connected (https://wallet.dappportal.io)

• WalletType.Liff : Status opened from LINE Messenger (Android/iOS)

• WalletType.Extension : Status opened from chrome extension

• WalletType.Mobile : Status opened from Kaia Wallet mobile App

• WalletType.OKX : Status opened from OKX Wallet

b. async request(requestArgs: RequestArguments): Promise

It sends request to connected wallet. This function provides JSON-RPC API format on request. You can send request to retrieve healthy status of chain and sign transaction with wallet. If you send it before wallet connection, user will see a screen to select wallet type to connect.

The requests and responses available in this function are shown in the following table.

(W : wallet connection required / U : wallet unlocked required)

Codition	RPC method
	kaia_accounts
	klay_accounts
	eth_accounts
W	kaia_requestAccounts
W	klay_requestAccounts
W	eth_requestAccounts
W/U	kaia_signLegacy (KIP-97)
W/U	personal_sign (EIP-191)
W/U	kaia_connectAndSign (sign follows EIP-191)
W/U	kaia_sendTransaction
W/U	klay_sendTransaction
W/U	eth_sendTransaction
W/U	kaia_signTransaction
W/U	klay_signTransaction

We recommend to use personal_sign to get compatibility with various wallets including OKX Wallet.

RPC methods that are not included in the table will be requested directly to the chain node and please refer to Kaia docs' RPC API Reference.

Error

{code: -32001, message: 'User canceled'}

Code	Description
-32001	User canceled request - Closed popup - Clicked cancel button from wallet
-32005	User logged out due to incorrect password input

c. Event

WalletProvider supports EventEmitter interface as EIP-1193.

d. disconnectWallet

• Disconnect connected wallet.

• Provide option to choose and connect walletType

Compatible Libraries

• https://docs.kaia.io/ko/references/sdk/ethers-ext/getting-started/

• https://docs.kaia.io/ko/references/sdk/web3js-ext/getting-started/

• https://docs.kaia.io/ko/references/sdk/caver-js/