solana/web3.js/README.md

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# Solana JavaScript API

This is the Solana Javascript API built on the Solana [JSON RPC API](https://solana-labs.github.io/solana/jsonrpc-api.html)

[Latest API Documentation](https://solana-labs.github.io/solana-web3.js/)


## Installation

### Yarn
```
$ yarn add @solana/web3.js
```

### npm
```
$ npm install --save @solana/web3.js
```

### Browser bundle
```html
<script src="https://github.com/solana-labs/solana-web3.js/releases/download/v0.0.6/solanaWeb3.min.js"></script>
```

### BPF program development
clang-7.0 must be installed to build BPF programs, such as
`examples/bpf-c-noop/`.  See `bpf-sdk/README.md` for installation details

## Usage

### Javascript
```js
const solanaWeb3 = require('@solana/web3.js');
console.log(solanaWeb3);
```

### ES6
```js
import solanaWeb3 from '@solana/web3.js';
console.log(solanaWeb3);
```

### Browser bundle
```js
// `solanaWeb3` is provided in the global namespace by the `solanaWeb3.min.js` script bundle.
console.log(solanaWeb3);
```

## Local Network
The `solana-localnet` program is provided to easily start a test Solana network
locally on your machine.  Docker must be installed.  The JSON RPC endpoint of
the local network is `http://localhost:8899`.

To start, first fetch the latest Docker image by running:
```bash
$ npx solana-localnet update
```

Then run the following command to start the network
```bash
$ npx solana-localnet up
```

While the network is running logs are available with:
```bash
$ npx solana-localnet logs -f
```

Stop the network with:
```bash
$ npx solana-localnet down
```

## Flow

A [Flow library definition](https://flow.org/en/docs/libdefs/) is provided at
[module.flow.js](https://github.com/solana-labs/solana-web3.js/tree/master/module.flow.js).
Add the following line under the [libs] section of your project's .flowconfig to
activate it:
```ini
[libs]
node_modules/@solana/web3.js/module.flow.js
```

## Examples
See the [examples/](https://github.com/solana-labs/solana-web3.js/tree/master/examples) directory for small snippets.

Standalone examples:
* Web wallet: https://github.com/solana-labs/example-webwallet
* Tic-tac-toe: https://github.com/solana-labs/example-tictactoe

## Releases
Releases are available on [Github](https://github.com/solana-labs/solana-web3.js/releases)
and [npmjs.com](https://www.npmjs.com/package/@solana/web3.js)

Each Github release features a tarball containing API documentation and a
minified version of the module suitable for direct use in a browser environment
(&lt;script&gt; tag)