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class="breadcrumbs__link">dApp Libraries</span><meta itemprop="position" content="2"></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">Jackal.go</span><meta itemprop="position" content="3"></li></ul></nav><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><h1>Jackal.go</h1><h2 class="anchor anchorWithStickyNavbar_LWe7" id="quickstart">Quickstart<a href="#quickstart" class="hash-link" aria-label="Direct link to Quickstart" title="Direct link to Quickstart"></a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="setting-up-your-wallet">Setting up your Wallet<a href="#setting-up-your-wallet" class="hash-link" aria-label="Direct link to Setting up your Wallet" title="Direct link to Setting up your Wallet"></a></h3><div class="language-go codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-go codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain">seed </span><span class="token operator" style="color:#393A34">:=</span><span class="token plain"> </span><span class="token string" style="color:#e3116c">"SEED_PHRASE"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">rpc </span><span class="token operator" style="color:#393A34">:=</span><span class="token plain"> </span><span class="token string" style="color:#e3116c">"https://jackal-testnet-rpc.polkachu.com:443"</span><span class="token plain"> </span><span class="token comment" style="color:#999988;font-style:italic">// testnet rpc for example</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">chainid </span><span class="token operator" style="color:#393A34">:=</span><span class="token plain"> </span><span class="token string" style="color:#e3116c">"lupulella-2"</span><span class="token plain"> </span><span class="token comment" style="color:#999988;font-style:italic">// testnet chain-id for example</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">wallet</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> err </span><span class="token operator" style="color:#393A34">:=</span><span class="token plain"> wallet_handler</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#d73a49">NewWalletHandler</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> seed</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> rpc</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> chainid</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">if</span><span class="token plain"> err </span><span class="token operator" style="color:#393A34">!=</span><span class="token plain"> </span><span class="token boolean" style="color:#36acaa">nil</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token function" style="color:#d73a49">panic</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">err</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">}</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="setting-up-fileio">Setting up FileIO<a href="#setting-up-fileio" class="hash-link" aria-label="Direct link to Setting up FileIO" title="Direct link to Setting up FileIO"></a></h3><div class="language-go codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-go codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain">fileIo</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> err </span><span class="token operator" style="color:#393A34">:=</span><span class="token plain"> file_io_handler</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#d73a49">NewFileIoHandler</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">wallet</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">if</span><span class="token plain"> err </span><span class="token operator" style="color:#393A34">!=</span><span class="token plain"> </span><span class="token boolean" style="color:#36acaa">nil</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token function" style="color:#d73a49">panic</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">err</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">}</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="generating-root-folder">Generating Root Folder<a href="#generating-root-folder" class="hash-link" aria-label="Direct link to Generating Root Folder" title="Direct link to Generating Root Folder"></a></h3><div class="language-go codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-go codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain">operatingRoot </span><span class="token operator" style="color:#393A34">:=</span><span class="token plain"> </span><span class="token string" style="color:#e3116c">"ROOT_FOLDER_NAME"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token boolean" style="color:#36acaa">_</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> err </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> fileIo</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#d73a49">DownloadFolder</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">fmt</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#d73a49">Sprintf</span><span class="token punctuation" style="color:#393A34">(</span><span class="token string" style="color:#e3116c">"s/%s"</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> operatingRoot</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">if</span><span class="token plain"> err </span><span class="token operator" style="color:#393A34">!=</span><span class="token plain"> </span><span class="token boolean" style="color:#36acaa">nil</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token boolean" style="color:#36acaa">_</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> err </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> fileIo</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#d73a49">GenerateInitialDirs</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">[</span><span class="token punctuation" style="color:#393A34">]</span><span class="token builtin">string</span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain">operatingRoot</span><span class="token punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">if</span><span class="token plain"> err </span><span class="token operator" style="color:#393A34">!=</span><span class="token plain"> </span><span class="token boolean" style="color:#36acaa">nil</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token function" style="color:#d73a49">panic</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">err</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">}</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="uploading-file">Uploading File<a href="#uploading-file" class="hash-link" aria-label="Direct link to Uploading File" title="Direct link to Uploading File"></a></h3><div class="language-go codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-go codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain">bytes </span><span class="token operator" style="color:#393A34">:=</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">[</span><span class="token punctuation" style="color:#393A34">]</span><span class="token plain">bytes</span><span class="token punctuation" style="color:#393A34">{</span><span class="token string" style="color:#e3116c">"SOME_FILE_DATA_HERE"</span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">fileName </span><span class="token operator" style="color:#393A34">:=</span><span class="token plain"> </span><span class="token string" style="color:#e3116c">"NAME_OF_SOME_FILE"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">path </span><span class="token operator" style="color:#393A34">:=</span><span class="token plain"> </span><span class="token string" style="color:#e3116c">"PARENT_FOLDER_OF_SOME_FILE"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">fileUpload</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> err </span><span class="token operator" style="color:#393A34">:=</span><span class="token plain"> file_upload_handler</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#d73a49">TrackVirtualFile</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">bytes</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> fileName</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> path</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">if</span><span class="token plain"> err </span><span class="token operator" style="color:#393A34">!=</span><span class="token plain"> </span><span class="token boolean" style="color:#36acaa">nil</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token function" style="color:#d73a49">panic</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">err</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">folder</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> err </span><span class="token operator" style="color:#393A34">:=</span><span class="token plain"> fileIo</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#d73a49">LoadNestedFolder</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">path</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">if</span><span class="token plain"> err </span><span class="token operator" style="color:#393A34">!=</span><span class="token plain"> </span><span class="token boolean" style="color:#36acaa">nil</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token function" style="color:#d73a49">panic</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">err</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token boolean" style="color:#36acaa">_</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> fids</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> </span><span class="token boolean" style="color:#36acaa">_</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> err </span><span class="token operator" style="color:#393A34">:=</span><span class="token plain"> fileIo</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#d73a49">StaggeredUploadFiles</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">[</span><span class="token punctuation" style="color:#393A34">]</span><span class="token operator" style="color:#393A34">*</span><span class="token plain">file_upload_handler</span><span class="token punctuation" style="color:#393A34">.</span><span class="token plain">FileUploadHandler</span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain">fileUpload</span><span class="token punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> folder</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> </span><span class="token boolean" style="color:#36acaa">false</span><span class="token punctuation" style="color:#393A34">)</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="downloading-file">Downloading File<a href="#downloading-file" class="hash-link" aria-label="Direct link to Downloading File" title="Direct link to Downloading File"></a></h3><div class="language-go codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-go codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain">handler</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> err </span><span class="token operator" style="color:#393A34">:=</span><span class="token plain"> fileIo</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#d73a49">DownloadFile</span><span class="token punctuation" style="color:#393A34">(</span><span class="token string" style="color:#e3116c">"s/"</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">+</span><span class="token plain"> operatingRoot</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">if</span><span class="token plain"> err </span><span class="token operator" style="color:#393A34">!=</span><span class="token plain"> </span><span class="token boolean" style="color:#36acaa">nil</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token function" style="color:#d73a49">panic</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">err</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">fileBytes </span><span class="token operator" style="color:#393A34">:=</span><span class="token plain"> handler</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#d73a49">GetFile</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#d73a49">Buffer</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#d73a49">Bytes</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"> </span><span class="token comment" style="color:#999988;font-style:italic">// do with the filebytes as you please</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" 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