# D'CENT WalletConnect ## The Structural Diagram to Know How WalletConnect Works

#### connector event subscription ```typescript function on(event : string , callback : (error : Error | null , payload : any | null ) => void ) : void ``` * `event` : connect, disconnect, session\_request, session\_update, call\_request, wc\_sessionRequest, wc\_sessionUpdate #### create session (session\_request) ```typescript async function createSession() : Promise; ``` #### kill session (disconnect) ```typescript function killSession() : void ``` #### example code ```typescript import WalletConnect from "@dcentwallet/walletconnect-client"; import QRcodeModal from "@dcentwallet/qrcode-modal" // if connect func exec , modal must be opened const connect = async () => { const qrcodeModalOptions = {}; const connector = new WalletConnect({ qrcodeModal: QRCodeModal, qrcodeModalOptions }); // create session if(!connector.connected){ await connector.createSession({chainId : '' }) // in order to open modal, createSession is required } // subscribe connector event subscribeToEvents(); } // subscribe event function // callback : (err, payload) => void const subscribeToEvent = () => { connector.on('session_update', async callback ) connector.on('connect', callback ) connector.on('disconnect', callback ) // kill session } const killSession = async () => { if(connector) { connector.killSession(); } // attach reset your app state code }type ``` ## sendTransaction, signTransaction ```typescript async function sendTransaction({ from : string, // required to : string, // required gas : string, // required gasPrice : string, //required value : string, // required data : string, // required nonce : string, // required }) : Promise //required async function signTransaction({ from: string, // required to: string, // required gas: string, // required gasPrice: string, // required value: string, // required data: string, // required nonce: string, // required }): Promise; ``` ```typescript const tx = { from, to, nonce, gasPrice, gasLimit, value, data }; const sendTransactionResult = await connector.sendTransaction(tx) // sendTransactionResult returns transaction hash const signTransactionResult = await connector.signTransaction(tx) // signTransactionResult returns signed transaction // result returns transaction hash ``` * Other connector methods : `signMessage`, `signPersonalMessage`, `signTypedData` * For more information, refer to the following: {% embed url="" %} ## Get D’CENT Wallet Address ```typescript connector.on('connect', (err, payload) => { const { chainId, accounts } = payload.params[0]; const address = accounts[0] // D'CENT Wallet Address } ``` ## Request D’CENT to create accounts ```typescript const qrcodeModalOptions = {}; // see below more details const connector = new WalletConnect({ qrcodeModal: QRCodeModal, qrcodeModalOptions}) ``` #### `qrcodeModalOptions` * `qrcodeModalOptions` interface | property | type | required | | :---------: | :----------: | :----------: | | serviceName | string | required | | accounts | IAccount \[] | not required | * `IAccount` interface

property	type	required	example
contractAddress	string	required	0x4c665BBafd28Ec9e5D792345f470ebFcA21E3d15
networkType	string	required	ETHEREUM / POLYGON / …
name	string	required	only when networkType supports contract
symbol	string	required	only when networkType supports contract

#### example ```typescript const qrcodeModalOptions = { serviceName: "insert your dapp name", accounts: [ { contractAddress: '', networkType: 'XRP' }, { contractAddress: '0x2791bca1f2de4661ed88a30c99a7a9449aa84174', networkType: 'POLYGON', name: 'USD Coin', symbol: 'USDC', }, { contractAddress: '0xc2132d05d31c914a87c6611c10748aeb04b58e8f', networkType: 'POLYGON', name: 'Tether', symbol: 'USDT' } ] }; const connector = new WalletConnect({ qrcodeModal : QRcodeModal, qrcodeModalOptions }); ``` ## NetworkType List > Network types where you can create accounts. (Main Account & Token Account Support)

networkType	support contract
BITCOIN	X
BTC-SEGWIT	X
ETHEREUM	O
RSK	O
XRP	O
MONACOIN	X
KLAYTN	O
BITCOINCASH	X
BCH-ABC	X
ECASH	X
ZCASH	X
LITECOIN	X
LTC-SEGWIT	X
BITCOIN-GOLD	X
DASH	X
DIGIBYTE	X
DGB-SEGWIT	X
RAVENCOIN	X
BINANCE	O
STELLAR	O
ETH-CLASSIC	X
BITCOIN-SV	X
TRON	O
DOGECOIN	X
LUNIVERSE	O
PALM	X
FLARE	X
XINFIN	O
CARDANO	X
BSC	O
POLYGON	O
HORIZEN	X
HEDERA	O
STACKS	O
SOLANA	O
POLKADOT	X
CONFLUX	O
HECO	O
XDAI	O
FANTOM	O
CELO	O
METADIUM	O
KUCOIN	O
SONGBIRD	O
AVALANCHE	O
EWT	O
ARBITRUM	O
BODA	O
OEC	O
HARMONY	O
ORBITCHAIN	O
OPENCOIN	O
CRONOS	O

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