🪐Cosmos DApps Integration

Welcome to MapNodeCore Extension Wallet Developer Guide. This documentation contains guides for developers to get started developing on MapNodeCore Extension Wallet.‌

To detect MapNodeCore Extension with Cosmos Base Chain

To detect whether your browser is running MapNodeCore Extension, please use:

if (window.MapNodeCore) {
  console.log('MapNodeCore Extension is installed!');
}

Notice: MapNodeCore Extension Testnet is under development and not available now.

To connect MapNodeCore Extension Wallet

To connect MapNodeCore Extension means to access the user's [blockchain - like Cosmos] account(s).

// Connect only
const connection = window.MapNodeCore.cosmos('<chain: String>');
// Connect & get accounts
connection.request({ method: 'cosmos_accounts' });
// Check whether dapp connected or not
connection.isConnected();

Currently chains support: ['terra','cosmos']

---

To disconnect MapNodeCore Extension Wallet

To disconnect MapNodeCore Extension, please use:

connection.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

connection.request({ method: 'cosmos_accounts' }).then((accounts) => {
  if (accounts[0]) {
    // Do something with accounts
  } else {
    // Wallet not found
  }
});

Check wallet whether exists or not

return Promise<{data: Boolean}>

const hasWallet = connection.request({ method: 'has_wallet', params: ['<chain>'] });

Execute contract function

return: Promise<Hash>

const signature = connection.request({
  method: 'cosmos_execute',
  params: ['<contractAddres: string>', '<executeMsg: string>'],
});

// Example Execute Contract
let cw20Contract =
  'juno10rktvmllvgctcmhl5vv8kl3mdksukyqf2tdveh8drpn0sppugwwqjzz30z';
let execMsg =
  '{"transfer":{"amount":"1","recipient":"juno1cx4nq77x3unvl2xsa9fmm9drxkexzkjnzwt2y7"}}';

const response = await connection.request({
  method: 'cosmos_execute',
  params: [cw20Contract, execMsg],
});

---

To handle events

List of events

Currently we only support some action event from wallet extension

connection.on('event_name', callback);
​//Example
connection.on('close', () => window.location.reload());
connection.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