Math Wallet

const { fromBech32 } = require('@harmony-js/crypto');
const defaults = {};
​
export class MathWallet {
​
	constructor(network, client) {
		console.log(network, client);
		this.isMathWallet = false;
	}
​
	 signIn() {
		if (!this.mathwallet) {
			this.initWallet();
		}
​
		this.mathwallet.getAccount().then((account) => {
			this.sessionType = `mathwallet`;
			this.address = account.address;
			this.isAuthorized = true;
			return Promise.resolve();
		});
	}
​
	 initWallet() {
		this.isMathWallet = window.harmony && window.harmony.isMathWallet;
		this.mathwallet = window.harmony;
		this.signIn();
	}
​
	 async signTransaction(txn) {
		console.log(this.isMathWallet);
		if (this.sessionType === 'mathwallet' && this.isMathWallet) {
			console.log(this.mathwallet);
			return this.mathwallet.signTransaction(txn);
		}
	}
​
	 attachToContract(contract) {
		contract.wallet.createAccount();
​
		if (contract.wallet.defaultSigner === '') {
			contract.wallet.defaultSigner = this.address;
		}
​
		contract.wallet.signTransaction = async (tx) => {
			try {
				tx.from = this.address;
				const signTx = await this.signTransaction(tx);
				console.log(signTx);
				return signTx;
			} catch (err) {
				if (err.type === 'locked') {
					alert(
						'Your MathWallet is locked! Please unlock it and try again!'
					);
					return Promise.reject();
				} else if (err.type === 'networkError') {
					await this.signIn();
					this.initWallet();
​
					try {
						tx.from = this.address;
						const signTx = await this.signTransaction(tx);
						return signTx;
					} catch (error) {
						return Promise.reject(error);
					}
				} else {
					alert(
						'An error occurred - please check that you have MathWallet installed and that it is properly configured!'
					);
					return Promise.reject();
				}
			}
		};
​
		return contract;
	}
}