This is the operation library of Smart Contract and Wallet.
- Install ChainHandler NPM package
npm install --save chain-handler
# OR
yarn add chain-handler- Then you can add ChainHandler to your Dapp as follows
import { ConnectToInjected, ConnectToCoinbase, ConnectToWalletConnect, Networks, InjectedTag } from 'chain-handler';
// Initialization InjectedHandler
let injectedHandler = ConnectToInjected();
// BitKeep Wallet
let injectedHandler = ConnectToInjected(InjectedTag.BitKeep);
// Coin98 Wallet
let injectedHandler = ConnectToInjected(InjectedTag.Coin98);
// if it's Coinbase
let injectedHandler = ConnectToCoinbase({
appName: 'your app name',
appLogoURL: 'http://xxxxx.xxx/xxx.png',
network: Networks.ETH_MAIN,
jsonrpcURL: 'your infura url' // optional
});
// Initialization is successful after.
// Get the latest wallet address.
let address = await injectedHandler.getAddress();
// Switch networks
injectedHandler.switchNetwork(Networks.BSC_MAIN); // BSC main net
injectedHandler.switchNetwork(Networks.ETH_MAIN); // ETH main net
injectedHandler.switchNetwork(Networks.OEC_MAIN); // OEC main net
injectedHandler.switchNetwork(Networks.ETH_GOERLI); // Ethereum Testnet Görli
// listen for changes
injectedHandler.listenForChanges('chainChanged', () => {console.log('network changed')});
injectedHandler.listenForChanges('accountsChanged', () => {console.log('account changed')});
// Initialization WalletConnectHandler
const options = {
bridge?: string,
qrcode?: bool,
infuraid?: string,
network: Networks,
qrcodeModalOptions?: object
};
let walletConnectHandler;
ConnectToWalletConnect(options)
.then((res) => {
walletConnectHandler = res.walletConnectHandler;
console.log(res.walletConnectHandler);
console.log(res.address);
})
.catch(err => console.error(err));
// listen for changes
walletConnectHandler.listenForChanges('accountsChanged', (accounts) => {});
walletConnectHandler.listenForChanges('chainChanged', (chainId) => {});
walletConnectHandler.listenForChanges('disconnect', (code, reason) => {});
// Disconnect the Wallet Connect.
walletConnectHandler.disconnect();
// Both has some functions too.
async queryContract(address, abi,funcName,...args);
async runContractTransactionFunc(address, abi, funcName,...args);
async signMessage(message, toBytes = false);
formatUnits(ether, num);MIT