From 3f4f670691944626f70e2aeff900485be3cf4ce5 Mon Sep 17 00:00:00 2001
From: David Dias <daviddias.p@gmail.com>
Date: Thu, 30 Mar 2017 09:43:00 +0100
Subject: [PATCH] feat: isEqual

---
 README.md          |  3 +++
 src/index.js       | 10 ++++++++++
 test/index.spec.js | 14 ++++++++++++++
 3 files changed, 27 insertions(+)

diff --git a/README.md b/README.md
index cc47f52..0da2d07 100644
--- a/README.md
+++ b/README.md
@@ -203,6 +203,9 @@ Returns an `obj` of the form
 
 Alias for `.toJSON()`.
 
+### `isEqual(id)`
+
+- `id` can be a PeerId or a Buffer containing the id
 
 # License
 
diff --git a/src/index.js b/src/index.js
index c1baba8..0e78285 100644
--- a/src/index.js
+++ b/src/index.js
@@ -88,6 +88,16 @@ class PeerId {
   toB58String () {
     return this._idB58String
   }
+
+  isEqual (id) {
+    if (Buffer.isBuffer(id)) {
+      return this.id.equals(id)
+    } else if (id.id) {
+      return this.id.equals(id.id)
+    } else {
+      throw new Error('not valid Id')
+    }
+  }
 }
 
 exports = module.exports = PeerId
diff --git a/test/index.spec.js b/test/index.spec.js
index 5cbc952..c822c87 100644
--- a/test/index.spec.js
+++ b/test/index.spec.js
@@ -129,6 +129,20 @@ describe('PeerId', () => {
     expect(id.toBytes().toString('hex')).to.equal(testIdBytes.toString('hex'))
   })
 
+  it('isEqual', (done) => {
+    parallel([
+      (cb) => PeerId.create(cb),
+      (cb) => PeerId.create(cb)
+    ], (err, ids) => {
+      expect(err).to.not.exist()
+      expect(ids[0].isEqual(ids[0])).to.equal(true)
+      expect(ids[0].isEqual(ids[1])).to.equal(false)
+      expect(ids[0].isEqual(ids[0].id)).to.equal(true)
+      expect(ids[0].isEqual(ids[1].id)).to.equal(false)
+      done()
+    })
+  })
+
   describe('fromJSON', () => {
     it('full node', (done) => {
       PeerId.create({ bits: 1024 }, (err, id) => {