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api-provider
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<!-- Title -->
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<a href=".." >api-provider</a>
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<p><a href="https://polkadot.js.org" target="_blank"><img src="https://img.shields.io/badge/polkadot-js-orange.svg?style=flat-square" alt="polkadotjs"></a> <img src="https://img.shields.io/badge/license-ISC-lightgrey.svg?style=flat-square" alt="isc"> <a href="https://github.com/Flet/semistandard" target="_blank"><img src="https://img.shields.io/badge/code%20style-semistandard-lightgrey.svg?style=flat-square" alt="style"></a> <a href="https://www.npmjs.com/package/@polkadot/api-provider" target="_blank"><img src="https://img.shields.io/npm/v/@polkadot/api-provider.svg?style=flat-square" alt="npm"></a> <a href="https://travis-ci.org/polkadot-js/api" target="_blank"><img src="https://img.shields.io/travis/polkadot-js/api.svg?style=flat-square" alt="travis"></a> <a href="https://codeclimate.com/github/polkadot-js/api/maintainability" target="_blank"><img src="https://img.shields.io/codeclimate/maintainability/polkadot-js/api.svg?style=flat-square" alt="maintainability"></a> <a href="https://coveralls.io/github/polkadot-js/api?branch=master" target="_blank"><img src="https://img.shields.io/coveralls/polkadot-js/api.svg?style=flat-square" alt="coverage"></a> <a href="https://david-dm.org/polkadot-js/api?path=packages/api-provider" target="_blank"><img src="https://david-dm.org/polkadot-js/api.svg?style=flat-square&path=packages/api-provider" alt="dependency"></a> <a href="https://david-dm.org/polkadot-js/api?path=packages/api-provider#info=devDependencies" target="_blank"><img src="https://david-dm.org/polkadot-js/api/dev-status.svg?style=flat-square&path=packages/api-provider" alt="devDependency"></a></p>
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<h1 id="polkadotapi-provider">@polkadot/api-provider</h1>
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<p>Generic transport providers to handle the transport of method calls to and from Polkadot clients from applications interacting with it. Generally, unless you are operating at a low-level and taking care of encoding and decoding of parameters/results, it won't be directly used. API interfaces building on top these providers can support various transports with the same underlying interfaces.</p>
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<h2 id="usage">Usage</h2>
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<p>Installation -</p>
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<pre><code>npm install --save @polkadot/api-provider
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</code></pre><p>Initialisation -</p>
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<pre><code class="lang-js"><div class="sunlight-container sunlight-theme-gitbook"><div class="sunlight-code-container"><pre class="sunlight-highlight-javascript sunlight-highlighted"><span class="sunlight-javascript"><span class="sunlight-reservedWord">import</span> <span class="sunlight-ident">WsProvider</span> <span class="sunlight-ident">from</span> <span class="sunlight-string">'@polkadot/api-provider/ws'</span><span class="sunlight-punctuation">;</span>
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<span class="sunlight-reservedWord">const</span> <span class="sunlight-ident">provider</span> <span class="sunlight-operator">=</span> <span class="sunlight-keyword">new</span> <span class="sunlight-ident">WsProvider</span><span class="sunlight-punctuation">(</span><span class="sunlight-string">'http://127.0.0.1:9944'</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
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<span class="sunlight-reservedWord">const</span> <span class="sunlight-ident">version</span> <span class="sunlight-operator">=</span> <span class="sunlight-ident">await</span> <span class="sunlight-ident">provider</span><span class="sunlight-operator">.</span><span class="sunlight-ident">send</span><span class="sunlight-punctuation">(</span><span class="sunlight-string">'client_version'</span><span class="sunlight-punctuation">,</span> <span class="sunlight-punctuation">[</span><span class="sunlight-punctuation">]</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
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<span class="sunlight-ident">console</span><span class="sunlight-operator">.</span><span class="sunlight-ident">log</span><span class="sunlight-punctuation">(</span><span class="sunlight-string">'clientVersion'</span><span class="sunlight-punctuation">,</span> <span class="sunlight-ident">version</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
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</span></pre></div></div></code></pre>
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