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Stephen Whitmore
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README.md
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README.md
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peer-id JavaScript implementation
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=================================
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# peer-id
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[](http://ipn.io)
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[](http://webchat.freenode.net/?channels=%23ipfs)
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@ -7,13 +6,38 @@ peer-id JavaScript implementation
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[](https://david-dm.org/diasdavid/js-peer-id)
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[](https://github.com/feross/standard)
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> IPFS Peer Id implementation in JavaScript
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> [IPFS](https://github.com/ipfs/ipfs) Peer ID implementation in JavaScript.
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# Description
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An IPFS Peer Id is based on a sha256 hash of the peer public key, using [multihash](https://github.com/jbenet/multihash)
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Generate, import, and export PeerIDs, for use with [IPFS](https://github.com/ipfs/ipfs).
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The public key is a base64 encoded string of a protobuf containing an RSA DER buffer. This uses a node buffer to pass the base64 encoded public key protobuf to the multihash for ID generation.
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*A Peer ID is the SHA-256 [multihash](https://github.com/jbenet/multihash) of a
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public key.*
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*The public key is a base64 encoded string of a protobuf containing an RSA DER
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buffer. This uses a node buffer to pass the base64 encoded public key protobuf
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to the multihash for ID generation.*
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# Example
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```js
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var PeerId = require('peer-id')
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var bs58 = require('bs58')
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var id = PeerId.create({ bits: 32 })
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console.log('id ', id.toB58String())
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console.log('priv key ', bs58.encode(id.privKey))
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console.log('pub key ', bs58.encode(id.pubKey))
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```
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```
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id QmeeLFb92nkZJGj3gXLqXrEMzCMYs6uBgQLVNbrcXEvYXk
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priv key 6ibrcPAbevzvPpkq6EA6XmLyuhmUrJrEvUfgQDtEiSEPzGnGU8Ejwf6b11DVm6opnFGo
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pub key 2BeBZVKJ9RQs4i4LbGv4ReEeuBA5dck2Gje3wt67e44XuyyPq5jE
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```
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# Installation
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@ -23,23 +47,29 @@ The public key is a base64 encoded string of a protobuf containing an RSA DER bu
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> npm i peer-id
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```
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## Use in Node.js
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# Setup
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## Node.js
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```JavaScript
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var PeerId = require('peer-id')
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```
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## Use in a browser with browserify, webpack or any other bundler
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## Browser: Browserify or Webpack
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The code published to npm that gets loaded on require is in fact a ES5 transpiled version with the right shims added. This means that you can require it and use with your favourite bundler without having to adjust asset management process.
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The code published to npm that gets loaded on require is in fact a ES5
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transpiled version with the right shims added. This means that you can require
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it and use with your favourite bundler without having to adjust asset management
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process.
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```JavaScript
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var PeerId = require('peer-id')
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```
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## Use in a browser Using a script tag
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## Browser: `<script>` Tag
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Loading this module through a script tag will make the `PeerId` obj available in the global namespace.
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Loading this module through a script tag will make the `PeerId` obj available in
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the global namespace.
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```html
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<script src="https://npmcdn.com/peer-id/dist/index.min.js"></script>
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@ -47,52 +77,81 @@ Loading this module through a script tag will make the `PeerId` obj available in
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<script src="https://npmcdn.com/peer-id/dist/index.js"></script>
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```
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# Usage
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# API
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### Creating a new Id
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```
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const PeerId = require('ipfs-peer')
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// Create a new Id
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const id = PeerId.create()
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// Recreate an Id from Hex string
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const id = PeerId.createFromHexString(str)
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// Recreate an Id from a Buffer
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const id = PeerId.createFromBytes(buf)
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// Recreate an B58 String
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const id = PeerId.createFromB58String(str)
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// Recreate from a Public Key
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const id = PeerId.createFromPubKey(pubKey)
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// Recreate from a Private Key
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const id = PeerId.createFromPrivKey(privKey)
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```js
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const PeerId = require('peer-id')
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```
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### Exporting an Id
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## Create
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```
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// Print friendly format
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id.toPrint() // returns an object with id, privKey and pubKey in hex format
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### PeerId.create()
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// Export to an hex string
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id.toHexString()
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Generates a new Peer ID, complete with public/private keypair. A Peer ID has the
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following properties:
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// Export to Buffer
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id.toBytes() (same as id.id)
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- `pubKey` - Buffer containing the public key bytes
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- `privKey` - Buffer containing the private key bytes
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- `id` - Buffer containing the multihash bytes
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// Export to a B58 string
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id.toB58String()
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## Import
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### PeerId.createFromHexString(str)
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Creates a Peer ID from hex string representing the key's multihash.
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### PeerId.createFromBytes(buf)
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Creates a Peer ID from a buffer representing the key's multihash.
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### PeerId.createFromB58String(str)
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Creates a Peer ID from a Base58 string representing the key's multihash.
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### PeerId.createFromPubKey(pubKey)
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Creates a Peer ID from a buffer containing a public key.
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### PeerId.createFromPrivKey(privKey)
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Creates a Peer ID from a buffer containing a private key.
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## Export
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### id.toPrint()
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Returns an object with the ID's properties in hex format:
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```js
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{
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id: 'QmckZzdVd72h9QUFuJJpQqhsZqGLwjhh81qSvZ9BhB2FQi',
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privKey: '080012a609308204a20201000282010100a608889914da08959d3a3db0734cee812c96...',
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pubKey: '080012a60230820122300d06092a864886f70d01010105000382010f003082010a0282010...'
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}
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```
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### Id format
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### id.toHexString()
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Returns the Peer ID's `id` as a hex string.
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```js
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1220d6243998f2fc56343ad7ed0342ab7886a4eb18d736f1b67d44b37fcc81e0f39f```
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### id.toBytes()
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Returns the Peer ID's `id` as a buffer.
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```js
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<Buffer 12 20 d6 24 39 98 f2 fc 56 34 3a d7 ed 03 42 ab 78 86 a4 eb 18 d7 36 f1 b6 7d 44 b3 7f cc 81 e0 f3 9f>
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```
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id.pubKey // Buffer containing the Public Key
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id.privKey // Buffer containing the Private Key
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id.id // Buffer containing the multihash
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### id.toB58String()
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Returns the Peer ID's `id` as a base58 string.
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```js
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QmckZzdVd72h9QUFuJJpQqhsZqGLwjhh81qSvZ9BhB2FQi
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```
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# License
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MIT
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