# OORT Wallet Developers

## **The OORT wallet (Chrome Extension) API**

The OORT wallet API provides tools for web developers interacting with MCP, the blockchain layer of CCN. The developers can use the API to transfer crypto assets, deploy smart contracts, and build dApps on MCP.

The OORT wallet provider's name is "aleereum".

#### Check if OORT wallet is installed

```
typeof window[“aleereum”] !== “undefined”
const provider = window[“aleereum”]
```

#### Check if OORT wallet is connected

```
const isConnected: boolean = provider.isConnected
```

#### Check if OORT wallet is locked

```
const islocked: boolean = provider.islocked
```

#### Get current network Id

```
const networkId: string = provider.networkId
```

NetworkId = 1: Mainnet (Under development)

NetworkId - 2: Dome-A Testnet

NetworkId = 3: Huygens Testnet

#### Get current account

```
const account = provider.account
```

#### Get an account balance

```
interface result {
	success: boolean
	balance: number
	msg: string
}
const balance: Promise<result> = provider.getBalance(account)
```

#### Connect or unlock the wallet

```
const connectStatus: Promise<boolean> = provider.connect()
```

#### Listen to the change of account

```
provider.on("on_account_change", (account) => console.log(account))
```

#### Listen to the change of networkId

```
provider.on("on_networkId_change", (networkId) => console.log(networkId))
```

#### Listen to the change of isConnected status of the wallet

```
provider.on("on_isConnected_change", (isConnected) => console.log(isConnected))
```

#### Listen to the change of lock/unlock status of the wallet

```
provider.on("on_islocked_change", (islocked) => console.log(islocked))
```

## Examples

#### Vue.js example code

```
// ale.js
import store from "./store";

window.onload = function() {
  if (typeof window.aleereum !== "undefined") {
    const provider = window["aleereum"];

    if (provider.isAle) {
      store.commit("IS_ALE", true);
      store.commit("M_SET_DAPP_ACCOUNT", provider.account);
      store.commit("M_SET_DAPP_CONNECT", provider.isConnected);
      store.commit("M_SET_DAPP_NETWORK", provider.networkId);
      store.commit("IS_ALE_ENABLED", !provider.islocked);

    } else {
      store.commit("HAS_ALE", false);
    }
  } else {
    store.commit("IS_ALE", false);
  }
};


// App.vue
export default {
    mounted(){
        this.listenDataChange();
    },
    methods: {
        handleNetworkChange(networkID) {
          this.$store.commit("M_SET_DAPP_NETWORK", networkID);
        },
        handleLockChange(status) {
          this.$store.commit("IS_ALE_ENABLED", !status);
        },
        handleConnectChange(status) {
          this.$store.commit("M_SET_DAPP_CONNECT", status);
        },
        handleAccountChange(account) {
          this.$store.commit("M_SET_DAPP_ACCOUNT", account);
        },
        listenDataChange() {
          window.aleereum.on("on_networkId_change", this.handleNetworkChange);
          window.aleereum.on("on_islocked_change", this.handleLockChange);
          window.aleereum.on("on_isConnected_change", this.handleConnectChange);
          window.aleereum.on("on_account_change", this.handleAccountChange);
        },
    },
}
```

#### Send a transaction to smart contract

```
import Mcp from "mcp.js";

const abi = require("./abi.json");

const mcp = new Mcp();

mcp.Contract.setProvider(https://huygens.computecoin.network);

const core = "0xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";  // contract address

const Contract = new mcp.Contract(abi, core);

// Query
Contract.methods.xxx().call()
.then(res => {
    console.log(res.toString());
})

// Transaction
Contract.methods.xxx().sendToBlock({
    from: account,
    amount: "0"
})
.then(res => {
    if(!res) {
        throw new Error("Transaction Failed.")
    } else {
        const hash = res.msg;   // blockHash
    } 
})
```