Ronin 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 Ronin

To detect whether your browser is running Coin98 Extension, please use:
if(window.coin98 || window.ethereum || window.ethereum?.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. Support window.ethereum only 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.ethereum.request({method: 'eth_accounts'});
// Alias for connection
window.ethereum.request({method: 'eth_requestAccounts'});
//Check if dapp connected

To disconnect Coin98 Extension Wallet

To disconnect Coin98 Extension, please use:

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.ethereum.request({ method: 'eth_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.ethereum.request({ method: 'has_wallet', params: ['ronin'] })
// Example
window.ethereum.request({ method: 'has_wallet', params: ['ronin'] }).then(() => {
// Wallet Exists
}).catch(e => {
// Wallet not found


return: Promise<Signature | RPC: 2.0>
// Example Sign
const signature = window.ethereum.request({
method: 'eth_sign',
params: [
"to": "string",
"gas": "string",
"gasPrice": "string",
"value": "string",
"data": "string",
"nonce": "string"


return Promise<hash>
method: 'eth_sendTransaction',
params: [
'to': 'string',
'gas': 'string',
'gasPrice': 'string',
'value': 'string',
'data': 'string',
'nonce': 'string'

RPC Request

return Promise<Ethereum RPC> Currently only support HTTP(s) method Reference: RPC Method
window.ethereum.request({method: '<Your Method>', params: [args1,....]})

To handle events

List of events

Currently we only support some action event from wallet extension
window.ethereum.on('event_name', callback);
window.ethereum.on('close', () => window.location.reload());
window.ethereum.on('accountsChanged', () => window.location.reload());
Receive when active account changed in Extension
Receive when active network changed in Extension
Receive when active chain changed in Extension
Receive when disconnect from Extension
Alias for disconnect event
on(event, callback)
Add event listener
off(event, callback)
Remove event listener