112 lines
2.4 KiB
JavaScript
112 lines
2.4 KiB
JavaScript
'use strict';
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// BIP21
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// =======
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// Helper for parsing and building bitcoin: URIs
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//
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// Examples:
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// =======
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// var uriString = 'bitcoin:1DP69gMMvSuYhbnxsi4EJEFufUAbDrEQfj?message=Hey%20there&amount=1.212';
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//
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// var uri = new BIP21(uriString);
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// uri.isValid() // true
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// uri.address // bitcore.Address object
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// uri.data.message // 'Hey there'
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// uri.data.amount // 1.212
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//
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// uriString = new BIP21({
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// address: '1DP69gMMvSuYhbnxsi4EJEFufUAbDrEQfj',
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// message: 'Hey there',
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// amount: 1.212
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// }).getURI();
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var URL = require('url');
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var Address = require('./Address');
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var BIP21 = function(arg) {
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this.data = {};
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this.address = undefined;
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if (typeof(arg) == 'string') {
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this.parse(arg);
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} else if (typeof(arg) == 'object') {
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this.fromObj(arg);
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} else if (typeof(arg) != 'undefined') {
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throw new Error('Invalid argument');
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}
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}
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BIP21.prototype.fromObj = function(obj) {
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for (var key in obj) {
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this.data[key] = obj[key];
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}
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if (obj.address) {
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delete this.data.address;
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this.setAddress(obj.address);
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}
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}
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BIP21.prototype.parse = function(uri) {
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var info = URL.parse(uri, true);
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if (info.protocol != 'bitcoin:') {
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throw new Error('Invalid protocol');
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}
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// workaround to host insensitiveness
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var group = /[^:]*:\/?\/?([^?]*)/.exec(uri);
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this.setAddress(group && group[1]);
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for (var arg in info.query) {
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var val = info.query[arg];
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if (arg === 'amount') val = Number(val);
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if (arg === 'r') this.data.merchant = val;
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this.data[arg] = val;
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}
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}
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BIP21.prototype.isValid = function(known) {
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var knownArguments = known || [];
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var valid = true;
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if (typeof(this.data.amount) != 'undefined') {
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valid &= !isNaN(this.data.amount);
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}
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if (this.address) {
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valid &= typeof(this.address) == 'object' && this.address.isValid();
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}
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// Require address or PayPro info
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valid &= !!(this.address || this.data.r);
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// Check required arguments
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for (var key in this.data) {
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if (key.indexOf('req-') == 0) {
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valid &= knownArguments.indexOf(key) != -1;
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}
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}
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return !!valid;
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}
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BIP21.prototype.setAddress = function(addr) {
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if (addr) {
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this.address = Address.validate(addr) ? new Address(addr) : addr;
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}
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return this;
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}
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BIP21.prototype.getURI = function() {
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return URL.format({
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protocol: 'bitcoin:',
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host: this.address,
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query: this.data
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});
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}
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module.exports = BIP21;
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