add toJSON and fromJSOn and cli to quickly generate

package.json

@@ -3,6 +3,7 @@
   "version": "0.6.6",
   "description": "IPFS Peer Id implementation in Node.js",
   "main": "lib/index.js",
+  "bin": "src/bin.js",
   "jsnext:main": "src/index.js",
   "scripts": {
     "lint": "aegir-lint",

src/bin.js

@@ -0,0 +1,7 @@
+#!/usr/local/bin/node
+
+'use strict'
+
+const PeerId = require('./index.js')
+
+console.log(JSON.stringify(PeerId.create().toJSON(), null, '  '))

src/index.js

@@ -13,14 +13,14 @@ const path = require('path')
 
 const pbCrypto = protobuf(fs.readFileSync(path.resolve(__dirname, '../protos/crypto.proto')))
 
-exports = module.exports = Id
+exports = module.exports = PeerId
 
 exports.Buffer = Buffer
 
-function Id (id, privKey, pubKey) {
+function PeerId (id, privKey, pubKey) {
   const self = this
 
-  if (!(self instanceof Id)) {
+  if (!(self instanceof PeerId)) {
     throw new Error('Id must be called with new')
   }
 
@@ -37,6 +37,14 @@ function Id (id, privKey, pubKey) {
     }
   }
 
+  self.toJSON = function () {
+    return {
+      id: self.id.toString('hex'),
+      privKey: self.privKey.toString('hex'),
+      pubKey: self.pubKey.toString('hex')
+    }
+  }
+
   // encode/decode functions
   self.toHexString = function () {
     return self.id.toString('hex')
@@ -122,26 +130,26 @@ exports.create = function (opts) {
 
   const mhId = multihashing(new Buffer(protoPublic64, 'base64'), 'sha2-256')
 
-  return new Id(mhId, bufProtoPriv64, bufProtoPub64)
+  return new PeerId(mhId, bufProtoPriv64, bufProtoPub64)
 }
 
 exports.createFromHexString = function (str) {
-  return new Id(new Buffer(str, 'hex'))
+  return new PeerId(new Buffer(str, 'hex'))
 }
 
 exports.createFromBytes = function (buf) {
-  return new Id(buf)
+  return new PeerId(buf)
 }
 
 exports.createFromB58String = function (str) {
-  return new Id(new Buffer(base58.decode(str)))
+  return new PeerId(new Buffer(base58.decode(str)))
 }
 
 // Public Key input will be a buffer
 exports.createFromPubKey = function (pubKey) {
   const buf = new Buffer(pubKey, 'base64')
   const mhId = multihashing(buf, 'sha2-256')
-  return new Id(mhId, null, pubKey)
+  return new PeerId(mhId, null, pubKey)
 }
 
 // Private key input will be a string
@@ -173,5 +181,12 @@ exports.createFromPrivKey = function (privKey) {
   // buffer the public key for consistency before storing
   const bufProtoPub64 = new Buffer(protoPublic64, 'base64')
   const mhId = multihashing(new Buffer(protoPublic64, 'base64'), 'sha2-256')
-  return new Id(mhId, privKey, bufProtoPub64)
+  return new PeerId(mhId, privKey, bufProtoPub64)
+}
+
+exports.createFromJSON = function (obj) {
+  return new PeerId(
+      new Buffer(obj.id, 'hex'),
+      new Buffer(obj.privKey, 'hex'),
+      new Buffer(obj.pubKey, 'hex'))
 }

test/index.spec.js

@@ -93,4 +93,12 @@ describe('id', function (done) {
     expect(id.toBytes().toString('hex')).to.equal(testIdBytes.toString('hex'))
     done()
   })
+
+  it('toJSON', (done) => {
+    const id = PeerId.create()
+    expect(id.toB58String()).to.equal(PeerId.createFromJSON(id.toJSON()).toB58String())
+    expect(id.privKey).to.deep.equal(PeerId.createFromJSON(id.toJSON()).privKey)
+    expect(id.pubKey).to.deep.equal(PeerId.createFromJSON(id.toJSON()).pubKey)
+    done()
+  })
 })