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Depending on the filter parameters used to track the events, once an event is found, it is stored in <code>localStorage</code> and it is also pushed to the observable which delivers it to the ÐApp subscription.</p> <h3 id="tracking-already-known-events"><a href="#tracking-already-known-events" aria-hidden="true" class="header-anchor">#</a> Tracking already known events</h3> <p>After restarting the ÐApp, either by executing it again in case of a console application or refreshing the browser the behavior of <code>Subspace</code> will change:
<img src="/assets/img/d3.123a2e18.png" alt="Second Usage - Setup"></p> <ol><li>The Dapp will request <code>Subspace</code> to track an event it already knows, creating an observable and subscription for that event</li> <li>It will retrieve events that were previously stored in localStorage and deliver them to the DApp subscription, avoiding having to query the chain for the old events again.</li></ol> <p><img src="/assets/img/d4.81f850ef.png" alt="Second Usage - Receiving events">
The web3 subscription created previously will start from the last known block instead of beginning from scratch. New events will be delivered normally from this step</p></div> <footer class="page-edit"><!----> <!----></footer> <div class="page-nav"><p class="inner"><span class="prev">
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