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<span class="token keyword">const</span> MyContract <span class="token operator">=</span> <span class="token function">require</span><span class="token punctuation">(</span><span class="token string">'./MyContract'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token keyword">const</span> <span class="token punctuation">{</span> pluck <span class="token punctuation">}</span> <span class="token operator">=</span> <span class="token function">require</span><span class="token punctuation">(</span><span class="token string">'rxjs/operators'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token keyword">const</span> <span class="token punctuation">{</span> makeExecutableSchema <span class="token punctuation">}</span> <span class="token operator">=</span> <span class="token function">require</span><span class="token punctuation">(</span><span class="token string">"graphql-tools"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token keyword">const</span> gql <span class="token operator">=</span> <span class="token function">require</span><span class="token punctuation">(</span><span class="token string">"graphql-tag"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token keyword">const</span> <span class="token punctuation">{</span> graphql <span class="token punctuation">}</span> <span class="token operator">=</span> <span class="token function">require</span><span class="token punctuation">(</span><span class="token string">"reactive-graphql"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token keyword">const</span> <span class="token function-variable function">run</span> <span class="token operator">=</span> <span class="token keyword">async</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">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 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 punctuation">:</span> <span class="token punctuation">{</span>
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<span class="token function-variable function">myEvents</span><span class="token punctuation">:</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 punctuation">:</span> <span class="token punctuation">{</span><span class="token punctuation">}</span><span class="token punctuation">,</span> fromBlock<span class="token punctuation">:</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> query <span class="token operator">=</span> gql<span class="token template-string"><span class="token template-punctuation string">`</span><span class="token string">
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query {
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myEvents {
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someValue
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anotherValue
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}
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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> stream <span class="token operator">=</span> <span class="token function">graphql</span><span class="token punctuation">(</span>schema<span class="token punctuation">,</span> query<span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">pipe</span><span class="token punctuation">(</span><span class="token function">pluck</span><span class="token punctuation">(</span><span class="token string">'data'</span><span class="token punctuation">,</span> <span class="token string">'myEvents'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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stream<span class="token punctuation">.</span><span class="token function">subscribe</span><span class="token punctuation">(</span><span class="token parameter">data</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
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console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>data<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>
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<span class="token function">run</span><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><span class="line-number">45</span><br><span class="line-number">46</span><br><span class="line-number">47</span><br><span class="line-number">48</span><br><span class="line-number">49</span><br><span class="line-number">50</span><br></div></div><div class="tip custom-block"><p>This example is available in <a href="https://github.com/status-im/subspace/tree/master/examples/reactive-graphql" target="_blank" rel="noopener noreferrer">Github<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></p></div></div> <footer class="page-edit"><!----> <!----></footer> <div class="page-nav"><p class="inner"><span class="prev">
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