Chapter 4: Integrating Wallet

Deploying the contract object instance to the Bitcoin network requires bitcoins. To do this, we need to access the wallet first to get bitcoins. Here we take sensilet as an example to introduce how to access the wallet.

Wallet implementation

We define some common wallet interfaces in wallet.ts and use sensilet to implement these interfaces. For the specific implementation, see: sensiletwallet.ts

Wallet initialization

Initialize the wallet in useEffect. First, set up a SensiletWallet object for web3. Then call web3.wallet.isConnected() to save the status of whether the wallet is connected.

In the rendering code of the App, it is determined whether to render the wallet login component Auth or the wallet balance component Balance by judging the state of states.isConnected.

return (
    <div className="App">
      <header className="App-header">
        <h2>Play Tic-Tac-Toe on Bitcoin</h2>
        ...
        {states.isConnected ? <Balance></Balance> : <Auth></Auth>}
      </header>
    </div>
  );

Wallet login

Below is the component Auth that implements wallet login. When the user clicks the Sensilet button, the wallet's requestAccount interface is called to log in to the wallet. An authorization prompt box will appear in the wallet plugin.

import { web3 } from "./web3";

const Auth = (props) => {

  const sensiletLogin = async (e) => {
    try {
      const res = await web3.wallet.requestAccount("tic-tac-toe");
      if (res) {
        window.location.reload();
      }
    } catch (error) {
      console.error("requestAccount error", error);
    }
  };

  return (
    <div className="auth">
      <div>
        <button
          className="pure-button button-large sensilet"
          onClick={sensiletLogin}
        >
          Sensilet
        </button>
      </div>
    </div>
  );
};

export default Auth;

Wallet balance

The Balance component calls the getbalance interface of the wallet to implement the function of displaying the wallet balance.

import { useState, useEffect } from "react";
import { web3 } from "./web3";
const Balance = (props) => {
  const [balance, setBalance] = useState(0);

  useEffect(async () => {
    if (web3.wallet) {
      web3.wallet.getbalance().then((balance) => {
        setBalance(balance);
      });
    }
  }, []);

    return (
      <div className="wallet">
        <div className="walletInfo">
          <div className="balance">
            <label>Balance: {balance} <span> (satoshis)</span></label>
          </div>
        </div>
      </div>
    );
};

export default Balance;

Put it to the test

  1. Initialize the wallet in the App component.
  2. Use the requestAccount interface in the Auth component to log in to the wallet
  3. Use the getbalance interface in the Balance component to get the wallet balance and display it.

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