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<svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg></a></div> <!----></nav> <ul class="sidebar-links"><li><a href="/" class="sidebar-link">Home</a></li><li><a href="/how-it-works.html" class="sidebar-link">How it works?</a><ul class="sidebar-sub-headers"></ul></li><li><a href="/getting-started.html" class="sidebar-link">Getting Started</a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a href="/getting-started.html#installation" class="sidebar-link">Installation</a></li><li class="sidebar-sub-header"><a href="/getting-started.html#importing-the-library" class="sidebar-link">Importing the library</a></li><li class="sidebar-sub-header"><a href="/getting-started.html#connecting-to-a-web3-provider" class="sidebar-link">Connecting to a web3 provider</a></li><li class="sidebar-sub-header"><a href="/getting-started.html#reacting-to-data" class="sidebar-link">Reacting to data</a></li><li class="sidebar-sub-header"><a href="/getting-started.html#tracking-state" class="sidebar-link">Tracking state</a></li><li class="sidebar-sub-header"><a href="/getting-started.html#tracking-events" class="sidebar-link">Tracking events</a></li><li class="sidebar-sub-header"><a href="/getting-started.html#tracking-balances" class="sidebar-link">Tracking balances</a></li><li class="sidebar-sub-header"><a href="/getting-started.html#subscriptions" class="sidebar-link">Subscriptions</a></li><li class="sidebar-sub-header"><a href="/getting-started.html#cleanup" class="sidebar-link">Cleanup</a></li></ul></li><li><section class="sidebar-group depth-0"><p class="sidebar-heading open"><span>Integrations</span> <!----></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/integrations-overview.html" class="sidebar-link">Overview</a></li><li><a href="/react.html" class="sidebar-link">React</a><ul class="sidebar-sub-headers"></ul></li><li><a href="/vue.html" class="sidebar-link">Vue</a><ul class="sidebar-sub-headers"></ul></li><li><section class="sidebar-group is-sub-group depth-1"><p class="sidebar-heading"><span>Redux</span> <!----></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/redux.html" class="sidebar-link">redux</a><ul class="sidebar-sub-headers"></ul></li><li><a href="/redux-observable.html" class="sidebar-link">redux-observable</a></li></ul></section></li><li><a href="/reactive-graphql.html" class="sidebar-link">reactive-graphql</a><ul class="sidebar-sub-headers"></ul></li><li><a href="/apollo-client.html" class="active sidebar-link">apollo-client</a><ul class="sidebar-sub-headers"></ul></li></ul></section></li><li><a href="/tutorial.html" class="sidebar-link">Tutorial</a></li><li><a href="/api.html" class="sidebar-link">API</a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a href="/api.html#general" class="sidebar-link">General</a></li><li class="sidebar-sub-header"><a href="/api.html#contract-methods" class="sidebar-link">Contract methods</a></li><li class="sidebar-sub-header"><a href="/api.html#low-level-api-for-data-tracking" class="sidebar-link">Low level API for data tracking</a></li></ul></li></ul> </aside> <main class="page"> <div class="theme-default-content content__default"><h1 id="apollo-client"><a href="#apollo-client" class="header-anchor">#</a> apollo-client</h1> <p>To use <strong>Subspace</strong> with <code>apollo-client</code>, a composed <code>ApolloLink</code> must be defined using the <code>apollo-link-rxjs</code> and <code>reactive-graphl</code> npm packages. Notice that the <code>addTypename</code> option of <code>InMemoryCache</code> must be set <code>false</code>.</p> <div class="language-js line-numbers-mode"><pre class="language-js"><code><span class="token keyword">import</span> <span class="token punctuation">{</span> ApolloClient <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">"apollo-client"</span><span class="token punctuation">;</span>
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<span class="token keyword">import</span> <span class="token punctuation">{</span> InMemoryCache <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">"apollo-cache-inmemory"</span><span class="token punctuation">;</span>
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<span class="token keyword">import</span> <span class="token punctuation">{</span> ApolloLink <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">"apollo-link"</span><span class="token punctuation">;</span>
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<span class="token keyword">import</span> <span class="token punctuation">{</span> rxjs <span class="token keyword">as</span> rxJsLink <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">"apollo-link-rxjs"</span><span class="token punctuation">;</span>
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<span class="token keyword">import</span> <span class="token punctuation">{</span> graphql <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">"reactive-graphql"</span><span class="token punctuation">;</span>
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<span class="token keyword">const</span> client <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ApolloClient</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
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<span class="token comment">// If addTypename:true, the query will fail due to __typename</span>
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<span class="token comment">// being added to the schema. reactive-graphql does not</span>
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<span class="token comment">// support __typename at this moment.</span>
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cache<span class="token operator">:</span> <span class="token keyword">new</span> <span class="token class-name">InMemoryCache</span><span class="token punctuation">(</span><span class="token punctuation">{</span> addTypename<span class="token operator">:</span> <span class="token boolean">false</span> <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
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link<span class="token operator">:</span> ApolloLink<span class="token punctuation">.</span><span class="token function">from</span><span class="token punctuation">(</span><span class="token punctuation">[</span>
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<span class="token function">rxJsLink</span><span class="token punctuation">(</span><span class="token punctuation">{</span><span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
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<span class="token keyword">new</span> <span class="token class-name">ApolloLink</span><span class="token punctuation">(</span><span class="token parameter">operation</span> <span class="token operator">=></span> <span class="token function">graphql</span><span class="token punctuation">(</span>schema<span class="token punctuation">,</span> operation<span class="token punctuation">.</span>query<span class="token punctuation">)</span><span class="token punctuation">)</span>
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<span class="token punctuation">]</span><span class="token punctuation">)</span>
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<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br></div></div><h3 id="example"><a href="#example" class="header-anchor">#</a> Example</h3> <div class="language-js line-numbers-mode"><div class="highlight-lines"><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><div class="highlighted"> </div><div class="highlighted"> </div><div class="highlighted"> </div><div class="highlighted"> </div><div class="highlighted"> </div><div class="highlighted"> </div><div class="highlighted"> </div><div class="highlighted"> </div><div class="highlighted"> </div><div class="highlighted"> </div><div class="highlighted"> </div></div><pre class="language-js"><code><span class="token keyword">import</span> <span class="token punctuation">{</span> ApolloClient <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">"apollo-client"</span><span class="token punctuation">;</span>
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<span class="token keyword">import</span> <span class="token punctuation">{</span> InMemoryCache <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">"apollo-cache-inmemory"</span><span class="token punctuation">;</span>
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<span class="token keyword">import</span> <span class="token punctuation">{</span> ApolloLink <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">"apollo-link"</span><span class="token punctuation">;</span>
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<span class="token keyword">import</span> <span class="token punctuation">{</span> rxjs <span class="token keyword">as</span> rxJsLink <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">"apollo-link-rxjs"</span><span class="token punctuation">;</span>
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<span class="token keyword">import</span> <span class="token punctuation">{</span> graphql <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">"reactive-graphql"</span><span class="token punctuation">;</span>
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<span class="token comment">// ...</span>
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<span class="token comment">// Initialize Subspace</span>
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<span class="token keyword">const</span> subspace <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Subspace</span><span class="token punctuation">(</span>web3<span class="token punctuation">.</span>currentProvider<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// Use a valid websocket provider (geth, parity, infura...)</span>
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<span class="token keyword">await</span> subspace<span class="token punctuation">.</span><span class="token function">init</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token keyword">const</span> MyContractInstance <span class="token operator">=</span> <span class="token operator">...</span><span class="token punctuation">;</span> <span class="token comment">// TODO: obtain a web3.eth.contract instance</span>
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<span class="token keyword">const</span> typeDefs <span class="token operator">=</span> <span class="token template-string"><span class="token template-punctuation string">`</span><span class="token string">
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type MyEvent {
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someValue: Int
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anotherValue: String
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}
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type Query {
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myEvents: MyEvent!
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}
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</span><span class="token template-punctuation string">`</span></span><span class="token punctuation">;</span>
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<span class="token keyword">const</span> resolvers <span class="token operator">=</span> <span class="token punctuation">{</span>
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Query<span class="token operator">:</span> <span class="token punctuation">{</span>
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<span class="token function-variable function">myEvents</span><span class="token operator">:</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
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<span class="token keyword">return</span> subspace<span class="token punctuation">.</span><span class="token function">trackEvent</span><span class="token punctuation">(</span>MyContractInstance<span class="token punctuation">,</span> <span class="token string">'MyEvent'</span><span class="token punctuation">,</span> <span class="token punctuation">{</span>filter<span class="token operator">:</span> <span class="token punctuation">{</span><span class="token punctuation">}</span><span class="token punctuation">,</span> fromBlock<span class="token operator">:</span> <span class="token number">1</span><span class="token punctuation">}</span><span class="token punctuation">)</span>
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<span class="token punctuation">}</span>
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<span class="token punctuation">}</span>
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<span class="token punctuation">}</span><span class="token punctuation">;</span>
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<span class="token keyword">const</span> schema <span class="token operator">=</span> <span class="token function">makeExecutableSchema</span><span class="token punctuation">(</span><span class="token punctuation">{</span> typeDefs<span class="token punctuation">,</span> resolvers <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token keyword">const</span> client <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ApolloClient</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
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<span class="token comment">// If addTypename:true, the query will fail due to __typename</span>
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<span class="token comment">// being added to the schema. reactive-graphql does not</span>
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<span class="token comment">// support __typename at this moment.</span>
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cache<span class="token operator">:</span> <span class="token keyword">new</span> <span class="token class-name">InMemoryCache</span><span class="token punctuation">(</span><span class="token punctuation">{</span> addTypename<span class="token operator">:</span> <span class="token boolean">false</span> <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
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link<span class="token operator">:</span> ApolloLink<span class="token punctuation">.</span><span class="token function">from</span><span class="token punctuation">(</span><span class="token punctuation">[</span>
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<span class="token function">rxJsLink</span><span class="token punctuation">(</span><span class="token punctuation">{</span><span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
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<span class="token keyword">new</span> <span class="token class-name">ApolloLink</span><span class="token punctuation">(</span><span class="token parameter">operation</span> <span class="token operator">=></span> <span class="token function">graphql</span><span class="token punctuation">(</span>schema<span class="token punctuation">,</span> operation<span class="token punctuation">.</span>query<span class="token punctuation">)</span><span class="token punctuation">)</span>
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<span class="token punctuation">]</span><span class="token punctuation">)</span>
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<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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</code></pre><div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br><span class="line-number">33</span><br><span class="line-number">34</span><br><span class="line-number">35</span><br><span class="line-number">36</span><br><span class="line-number">37</span><br><span class="line-number">38</span><br><span class="line-number">39</span><br><span class="line-number">40</span><br><span class="line-number">41</span><br><span class="line-number">42</span><br><span class="line-number">43</span><br><span class="line-number">44</span><br></div></div><div class="custom-block tip"><p class="custom-block-title">Using react-apollo</p> <p>A practical example can also be found in <code>examples/react-apollo</code>.</p></div></div> <footer class="page-edit"><!----> <!----></footer> <div class="page-nav"><p class="inner"><span class="prev">
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