BNB Chain DApps Integration

Welcome to Coin98 Extension Wallet Developer Guide. This documentation contains guides for developers to get started developing on Coin98 Extension Wallet.‌
To detect Coin98 Extension with BNB Chain
To detect whether your browser is running Coin98 Extension, please use:
if(window.coin98 || window.binancChain || window.binanceChain?.isCoin98){
    console.log('Coin98 Extension is installed!');
}
Notice: Coin98 Extension Testnet is under development and not available now. The Coin98 Extension on Ethereum JavaScript provider API is specified by EIP-1193. Supportwindow.ethereum + window.binance and removal window.web3
​
To connect Coin98 Extension Wallet
To connect Coin98 Extension means to access the user's [blockchain - like Ethereum] account(s).
// Connect & get accounts
window.binanceChain.request({method: 'bsc_accounts'});
// Alias for connection
window.binanceChain.request({method: 'bsc_requestAccounts'});​
//Check if dapp connected
window.binancChain.isConnected();
// Connect & get accounts
window.ethereum.request({method: 'eth_accounts'});
// Alias for connection
window.ethereum.request({method: 'eth_requestAccounts'});​
//Check if dapp connected
window.ethereum.isConnected();
​
To disconnect Coin98 Extension Wallet
To disconnect Coin98 Extension, please use:
window.binanceSmartChain.disconnect()
window.ethereum.disconnect()
To experience functions
Once your account is connected, let's start experiencing more functions.‌
Get Current Account
return Promise<Array[String]>
If wallet can not be found, return [] instead of throw Error
window.binanceChain.request({ method: 'bsc_accounts' }).then(accounts => {
  if (accounts[0]) {
    // Do something with accounts
  } else {
    // Wallet not found
  }
})
Check wallet whether exists or not
return Promise<{data: Boolean}>
window.binChain.request({ method: 'has_wallet', params: ['binanceSmartChain']})
// Example
window.binanceChain.request({ method: 'has_wallet', params: ['binanceSmartChain'] }).then(() => {
  // Wallet Exists
}).catch(e => { 
  // Wallet not found
})
Sign Transaction
return: Promise<Signature | RPC: 2.0>
// Example Sign Transactionconst
const signature = window.binanceSmartChain.request({
    method: 'bsc_sign',
    params: {
        "undefined": "string",
        "to": "string",
        "gas": "string",
        "gasPrice": "string",
        "value": "string",
        "data": "string",
        "nonce": "string"
    }
});
Transfer
return Promise<hash>
window.binanceSmartChain.request({
  method: 'bsc_sendTransaction',
  params: [
    {
      undefined: 'string',
      to: 'string',
      gas: 'string',
      gasPrice: 'string',
      value: 'string',
      data: 'string',
      nonce: 'string'
    }
  ]
})
RPC Request
return Promise<binanceSmartChain RPC> Currently only support HTTP(s) method Reference: RPC Method​
window.binanceChain.request({method: '<Your Method>', params: [args1,....]})
​
To handle events
List of events
Currently we only support some action event from wallet extension
window.binanceChain.on('event_name', callback);
​//Example
window.binanceChain.on('close', () => window.location.reload());
window.binanceChain.on('accountsChanged', () => window.location.reload());
Events
Trigger
accountsChanged
Receive when active account changed in Extension
networkChanged
Receive when active network changed in Extension
chainChanged
Receive when active chain changed in Extension
disconnect
Receive when disconnect from Extension
close
Alias for disconnect event
Method
Description
on(event, callback)
Add event listener
off(event, callback)
Remove event listener

Events	Trigger
accountsChanged	Receive when active account changed in Extension
networkChanged	Receive when active network changed in Extension
chainChanged	Receive when active chain changed in Extension
disconnect	Receive when disconnect from Extension
close	Alias for disconnect event

Method	Description
on(event, callback)	Add event listener
off(event, callback)	Remove event listener

Last modified 6mo ago