# Bitcore v0.9
## Principles
Bitcoin is a powerful new peer-to-peer platform for the next generation of financial technology. The decentralized nature of the Bitcoin network allows for highly resilient bitcoin infrastructure, and the developer community needs reliable, open-source tools to implement bitcoin apps and services. Bitcore provides a reliable API for javascript apps that need to interface with Bitcoin.
To get started, just `npm install bitcore` or `bower install bitcore` .
# Documentation Index
## Addresses and Key Management
* [Addresses ](address.md )
* [Using Different Networks ](networks.md )
* [Private Keys ](privatekey.md ) and [Public Keys ](publickey.md )
* [Hierarchically-derived Private and Public Keys ](hierarchical.md )
## Payment Handling
* [Using Different Units ](unit.md )
* [Acknowledging and Requesting Payments: Bitcoin URIs ](uri.md )
* [The Transaction Class ](transaction.md )
## Bitcoin Internals
* [Scripts ](script.md )
* [Block ](block.md )
## Extra
* [Crypto ](crypto.md )
* [Encoding ](encoding.md )
## Module Development
* [Browser Builds ](browser.md )
## Modules
Some functionality is implemented as a module that can be installed seperately:
* [Payment Protocol Support ](https://github.com/bitpay/bitcore-payment-protocol )
* [Peer to Peer Networking ](https://github.com/bitpay/bitcore-p2p )
* [Bitcoin Core JSON-RPC ](https://github.com/bitpay/bitcoind-rpc )
* [Payment Channels ](https://github.com/bitpay/bitcore-channel )
* [Mnemonics ](https://github.com/bitpay/bitcore-mnemonic )
* [Elliptical Curve Integrated Encryption Scheme ](https://github.com/bitpay/bitcore-ecies )
* [Blockchain Explorers ](https://github.com/bitpay/bitcore-explorers )
# Examples
## Create a Private Key
```javascript
var privKey = new bitcore.PrivateKey();
```
## Create an Address
```javascript
var privKey = new bitcore.PrivateKey();
var address = privKey.toAddress();
```
## Create a Multisig Address
```javascript
// Build a 2-of-3 address from public keys
var P2SHAddress = new bitcore.Address([publicKey1, publicKey2, publicKey3], 2);
```
## Request a Payment
```javascript
var paymentInfo = {
address: '1DNtTk4PUCGAdiNETAzQFWZiy2fCHtGnPx',
amount: 120000 //satoshis
};
var uri = new bitcore.URI(paymentInfo).toString();
```
## Create a Transaction
```javascript
var transaction = new Transaction()
.from(utxos) // Feed information about what unspent outputs one can use
.to(address, amount) // Add an output with the given amount of satoshis
.change(address) // Sets up a change address where the rest of the funds will go
.sign(privkeySet) // Signs all the inputs it can
```
## Connect to the Network
```javascript
var peer = new Peer('5.9.85.34');
peer.on('inv', function(message) {
// new inventory
});
peer.connect();
```