escrow-bitcoin/lib/address.js

A service to make possible escrow transactions using BTC (Bitcoin)

const bitcore = require("bitcore-lib");

/**
 * Gererate bitcoin address
 * 
 * @param {Object|PrivateKey} [data] - Can be a JSON or PrivateKey 
 * @returns Address
 */
function Address(data, network) {
    return new Promise(function (resolve, reject) {
        if (data instanceof bitcore.PrivateKey) {
            return resolve(this.generateFromPrivateKey(data, network))
        }
        return resolve(this.generateFromJson(data, network))
    }.bind(this))
}

Address.prototype.generateFromPrivateKey = function generateFromPrivateKey(privateKey, network = bitcore.Networks.testnet) {
    var publicKey = new bitcore.PublicKey(privateKey);
    var address = new bitcore.Address(publicKey, network);
    return address;
}

Address.prototype.generateFromJson = function generateFromJson(json, network = bitcore.Networks.testnet) {
    var bn;
    if (json) {
        var jsonStr = JSON.stringify(json)
        var value = Buffer.from(jsonStr);
        var hash = bitcore.crypto.Hash.sha256(value);
        bn = bitcore.crypto.BN.fromBuffer(hash);
    }
    var privateKey = new bitcore.PrivateKey(bn, network)
    var publicKey = new bitcore.PublicKey(privateKey);
    var address = new bitcore.Address(publicKey, network);
    return address;
}

/**
 * 
 * Create a new PrivateKey
 * 
 * @param {Object} [data] - JSON data to create a private key (optional)
 * @returns PrivateKey
 */
Address.createPrivateKey = function createPrivateKey(data, network = bitcore.Networks.testnet) {
    var bn;
    if (data) {
        var jsonStr = JSON.stringify(data)
        var value = Buffer.from(jsonStr);
        var hash = bitcore.crypto.Hash.sha256(value);
        bn = bitcore.crypto.BN.fromBuffer(hash);
    }
    var privateKey = new bitcore.PrivateKey(bn, network)
    return privateKey;
}

/**
 * Create a URI from Address and amount in Bitcoins to deposit
 * 
 * @param {Address} address - A valid Address
 * @param {number} amount - Number of amount to request (in satoshis)
 */
Address.requestPayment = function requestPayment(address, amount) {
    var paymentInfo = {
        address: address.toString(),
        amount: amount
    };
    var uri = new bitcore.URI(paymentInfo).toString();
    return uri;
}

//Exports PrivateKey
Address.PrivateKey = bitcore.PrivateKey;

module.exports = Address;