add BitcoinAddress
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require('classtool');
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function ClassSpec(b) {
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var base58 = b.base58 || require('base58-native').base58Check;
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function BitcoinAddress(data, encoding) {
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this.data = data;
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this.__proto__ = encodings[encoding || 'base58'];
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};
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// return the bitcoin address version (the first byte of the address)
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BitcoinAddress.prototype.version = function() {
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return this.as('binary').readUInt8(0);
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};
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// get or set the encoding used (transforms data)
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BitcoinAddress.prototype.encoding = function(encoding) {
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if(encoding) {
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this.data = this.as(encoding);
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this.__proto__ = encodings[encoding];
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}
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return this._encoding;
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};
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// answer a new instance having the given encoding
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BitcoinAddress.prototype.withEncoding = function(encoding) {
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return new BitcoinAddress(this.as(encoding), encoding);
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};
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// answer the data in the given encoding
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BitcoinAddress.prototype.as = function(encoding) {
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if(!encodings[encoding]) throw new Error('invalid encoding');
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return this.converters[encoding].call(this);
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};
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// validate the address (basically just check that we have 21 bytes)
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BitcoinAddress.prototype.validate = function() {
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this.withEncoding('binary').validate();
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};
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// convert to a string (in base58 form)
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BitcoinAddress.prototype.toString = function() {
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return this.as('base58');
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};
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// Setup support for various address encodings. The object for
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// each encoding inherits from the BitcoinAddress prototype. This
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// allows any encoding to override any method...changing the encoding
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// for an instance will change the encoding it inherits from. Note,
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// this will present some problems for anyone wanting to inherit from
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// BitcoinAddress (we'll deal with that when needed).
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var encodings = {
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'binary': {
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converters: {
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'base58': function() {
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return base58.encode(this.data);
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},
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'hex': function() {
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return this.data.toString('hex');
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},
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},
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validate: function() {
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if(this.data.length != 21) throw new Error('invalid data length');
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},
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},
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'base58': {
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converters: {
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'binary': function() {
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return base58.decode(this.data);
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},
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'hex': function() {
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return this.withEncoding('binary').as('hex');
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},
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},
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},
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'hex': {
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converters: {
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'binary': function() {
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return new Buffer(this.data, 'hex');
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},
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'base58': function() {
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return this.withEncoding('binary').as('base58');
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},
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},
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},
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};
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for(var k in encodings) {
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encodings[k].converters[k] = function() {return this.data;};
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encodings[k]._encoding = k;
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encodings[k].__proto__ = BitcoinAddress.prototype;
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};
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return BitcoinAddress;
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};
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module.defineClass(ClassSpec);
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@ -1,7 +1,7 @@
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{
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"name": "libcoin",
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"description": "Bitcoin Library",
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"version": "0.1.0",
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"version": "0.1.1",
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"author": {
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"name": "Stephen Pair",
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"email": "stephen@bitpay.com"
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@ -20,6 +20,10 @@
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"url": "http://github.com/gasteve/node-libcoin.git"
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},
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"scripts": {},
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"dependencies": {
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"classtool": ">=1.0.0",
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"base58-native": ">=0.1.1"
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},
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"devDependencies": {},
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"license": "MIT"
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}
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