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| <html class="default" lang="en" data-base=".."><head><meta charset="utf-8"/><meta http-equiv="x-ua-compatible" content="IE=edge"/><title>AfterEndContract | backtest-kit</title><meta name="description" content="Documentation for backtest-kit"/><meta name="viewport" content="width=device-width, initial-scale=1"/><link rel="stylesheet" href="../assets/style.css"/><link rel="stylesheet" href="../assets/highlight.css"/><script defer src="../assets/main.js"></script><script async src="../assets/icons.js" id="tsd-icons-script"></script><script async src="../assets/search.js" id="tsd-search-script"></script><script async src="../assets/navigation.js" id="tsd-nav-script"></script><script async src="../assets/hierarchy.js" id="tsd-hierarchy-script"></script></head><body><script>document.documentElement.dataset.theme = localStorage.getItem("tsd-theme") || "os";document.body.style.display="none";setTimeout(() => app?app.showPage():document.body.style.removeProperty("display"),500)</script><header class="tsd-page-toolbar"><div class="tsd-toolbar-contents container"><div class="table-cell" id="tsd-search"><div class="field"><label for="tsd-search-field" class="tsd-widget tsd-toolbar-icon search no-caption"><svg width="16" height="16" viewBox="0 0 16 16" fill="none" aria-hidden="true"><use href="../assets/icons.svg#icon-search"></use></svg></label><input type="text" id="tsd-search-field" aria-label="Search"/></div><div class="field"><div id="tsd-toolbar-links"></div></div><ul class="results"><li class="state loading">Preparing search index...</li><li class="state failure">The search index is not available</li></ul><a href="../index.html" class="title">backtest-kit</a></div><div class="table-cell" id="tsd-widgets"><a href="#" class="tsd-widget tsd-toolbar-icon menu no-caption" data-toggle="menu" aria-label="Menu"><svg width="16" height="16" viewBox="0 0 16 16" fill="none" aria-hidden="true"><use href="../assets/icons.svg#icon-menu"></use></svg></a></div></div></header><div class="container container-main"><div class="col-content"><div class="tsd-page-title"><ul class="tsd-breadcrumb"><li><a href="../modules.html">backtest-kit</a></li><li><a href="../modules/types.html">types</a></li><li><a href="types.AfterEndContract.html">AfterEndContract</a></li></ul><h1>Interface AfterEndContract</h1></div><section class="tsd-panel tsd-comment"><div class="tsd-comment tsd-typography"><p>Contract for the afterEnd lifecycle event of strategy execution.</p> | |
| <p>Emitted by the engine after the strategy iterator has finished — whether | |
| by reaching the end of the frame, being stopped via <code>stopStrategy</code>, | |
| throwing an error, or being cancelled by the consumer (e.g., breaking out | |
| of <code>for await</code>). Used by subscribers to perform teardown that should | |
| happen exactly once per run: flushing buffers, closing files, computing | |
| final aggregates, sending a "run completed" notification, etc.</p> | |
| <p>Guarantees:</p> | |
| <ul> | |
| <li>Fires exactly once per <code>run()</code> invocation, paired with the matching | |
| <code>BeforeStartContract</code> event. The pairing holds for every termination | |
| path including exceptions and external cancellation (delivered via the | |
| generator's <code>try/finally</code> block).</li> | |
| <li>Listener errors are caught and routed to the global errorEmitter; they | |
| never propagate to the original caller.</li> | |
| </ul> | |
| <p>Mode differences:</p> | |
| <ul> | |
| <li>In backtest mode, <code>when</code> is the cursor position from <code>TimeMetaService</code> | |
| at the moment of completion — i.e., the historical time of the last | |
| processed candle. If the run was interrupted before any candle was | |
| processed (e.g., empty frame, immediate cancellation), <code>when</code> falls | |
| back to the frame's planned start date so it equals | |
| <code>BeforeStartContract.when</code> for the same run. This means | |
| <code>afterEnd.when - beforeStart.when</code> is always the real processed | |
| duration, never an inflated planned one.</li> | |
| <li>In live mode, <code>when</code> is the current wall-clock time aligned to the | |
| 1-minute boundary at the moment of emission.</li> | |
| </ul> | |
| </div><div class="tsd-comment tsd-typography"><div class="tsd-tag-see"><h4 class="tsd-anchor-link"><a id="see" class="tsd-anchor"></a>See<a href="#see" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="../assets/icons.svg#icon-anchor"></use></svg></a></h4><p>BeforeStartContract — the paired initialization event.</p> | |
| </div></div></section><div class="tsd-signature"><span class="tsd-signature-keyword">interface</span> <span class="tsd-kind-interface">AfterEndContract</span> <span class="tsd-signature-symbol">{</span><br/> <a class="tsd-kind-property" href="types.AfterEndContract.html#backtest">backtest</a><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">boolean</span><span class="tsd-signature-symbol">;</span><br/> <a class="tsd-kind-property" href="types.AfterEndContract.html#currentprice">currentPrice</a><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">number</span><span class="tsd-signature-symbol">;</span><br/> <a class="tsd-kind-property" href="types.AfterEndContract.html#exchangename">exchangeName</a><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">string</span><span class="tsd-signature-symbol">;</span><br/> <a class="tsd-kind-property" href="types.AfterEndContract.html#framename">frameName</a><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">string</span><span class="tsd-signature-symbol">;</span><br/> <a class="tsd-kind-property" href="types.AfterEndContract.html#strategyname">strategyName</a><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">string</span><span class="tsd-signature-symbol">;</span><br/> <a class="tsd-kind-property" href="types.AfterEndContract.html#symbol">symbol</a><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">string</span><span class="tsd-signature-symbol">;</span><br/> <a class="tsd-kind-property" href="types.AfterEndContract.html#timestamp">timestamp</a><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">number</span><span class="tsd-signature-symbol">;</span><br/> <a class="tsd-kind-property" href="types.AfterEndContract.html#when">when</a><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">Date</span><span class="tsd-signature-symbol">;</span><br/><span class="tsd-signature-symbol">}</span></div><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/tripolskypetr/backtest-kit/blob/b46ad698ac0e7123aa3667408fbdc063c547335d/types.d.ts#L9088">types.d.ts:9088</a></li></ul></aside><section class="tsd-panel-group tsd-index-group"><section class="tsd-panel tsd-index-panel"><details class="tsd-index-content tsd-accordion" open><summary class="tsd-accordion-summary tsd-index-summary"><h5 class="tsd-index-heading uppercase" role="button" aria-expanded="false" tabIndex="0"><svg width="16" height="16" viewBox="0 0 16 16" fill="none" aria-hidden="true"><use href="../assets/icons.svg#icon-chevronSmall"></use></svg> Index</h5></summary><div class="tsd-accordion-details"><section class="tsd-index-section"><h3 class="tsd-index-heading">Properties</h3><div class="tsd-index-list"><a href="types.AfterEndContract.html#backtest" class="tsd-index-link"><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>backtest</span></a> | |
| <a href="types.AfterEndContract.html#currentprice" class="tsd-index-link"><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>current<wbr/>Price</span></a> | |
| <a href="types.AfterEndContract.html#exchangename" class="tsd-index-link"><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>exchange<wbr/>Name</span></a> | |
| <a href="types.AfterEndContract.html#framename" class="tsd-index-link"><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>frame<wbr/>Name</span></a> | |
| <a href="types.AfterEndContract.html#strategyname" class="tsd-index-link"><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>strategy<wbr/>Name</span></a> | |
| <a href="types.AfterEndContract.html#symbol" class="tsd-index-link"><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>symbol</span></a> | |
| <a href="types.AfterEndContract.html#timestamp" class="tsd-index-link"><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>timestamp</span></a> | |
| <a href="types.AfterEndContract.html#when" class="tsd-index-link"><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>when</span></a> | |
| </div></section></div></details></section></section><details class="tsd-panel-group tsd-member-group tsd-accordion" open><summary class="tsd-accordion-summary" data-key="section-Properties"><h2><svg width="20" height="20" viewBox="0 0 24 24" fill="none" aria-hidden="true"><use href="../assets/icons.svg#icon-chevronDown"></use></svg> Properties</h2></summary><section><section class="tsd-panel tsd-member"><a id="backtest" class="tsd-anchor"></a><h3 class="tsd-anchor-link"><span>backtest</span><a href="#backtest" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="../assets/icons.svg#icon-anchor"></use></svg></a></h3><div class="tsd-signature"><span class="tsd-kind-property">backtest</span><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">boolean</span></div><div class="tsd-comment tsd-typography"><p><code>true</code> if this event was emitted from a backtest run, <code>false</code> if from a | |
| live trading run. Use this to branch listener logic without inspecting | |
| other fields.</p> | |
| </div><div class="tsd-comment tsd-typography"></div><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/tripolskypetr/backtest-kit/blob/b46ad698ac0e7123aa3667408fbdc063c547335d/types.d.ts#L9114">types.d.ts:9114</a></li></ul></aside></section><section class="tsd-panel tsd-member"><a id="currentprice" class="tsd-anchor"></a><h3 class="tsd-anchor-link"><span>current<wbr/>Price</span><a href="#currentprice" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="../assets/icons.svg#icon-anchor"></use></svg></a></h3><div class="tsd-signature"><span class="tsd-kind-property">currentPrice</span><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">number</span></div><div class="tsd-comment tsd-typography"><p>Average symbol price observed at the moment the event was emitted, | |
| fetched from <code>ExchangeConnectionService.getAveragePrice(symbol)</code>. | |
| Provided as a convenience so subscribers don't need to query the | |
| exchange themselves.</p> | |
| </div><div class="tsd-comment tsd-typography"></div><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/tripolskypetr/backtest-kit/blob/b46ad698ac0e7123aa3667408fbdc063c547335d/types.d.ts#L9121">types.d.ts:9121</a></li></ul></aside></section><section class="tsd-panel tsd-member"><a id="exchangename" class="tsd-anchor"></a><h3 class="tsd-anchor-link"><span>exchange<wbr/>Name</span><a href="#exchangename" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="../assets/icons.svg#icon-anchor"></use></svg></a></h3><div class="tsd-signature"><span class="tsd-kind-property">exchangeName</span><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">string</span></div><div class="tsd-comment tsd-typography"><p>Name of the exchange that provided market data for this run.</p> | |
| </div><div class="tsd-comment tsd-typography"></div><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/tripolskypetr/backtest-kit/blob/b46ad698ac0e7123aa3667408fbdc063c547335d/types.d.ts#L9103">types.d.ts:9103</a></li></ul></aside></section><section class="tsd-panel tsd-member"><a id="framename" class="tsd-anchor"></a><h3 class="tsd-anchor-link"><span>frame<wbr/>Name</span><a href="#framename" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="../assets/icons.svg#icon-anchor"></use></svg></a></h3><div class="tsd-signature"><span class="tsd-kind-property">frameName</span><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">string</span></div><div class="tsd-comment tsd-typography"><p>Name of the frame (timeframe / date range) the run used. Empty string | |
| in live mode, where frames are not used.</p> | |
| </div><div class="tsd-comment tsd-typography"></div><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/tripolskypetr/backtest-kit/blob/b46ad698ac0e7123aa3667408fbdc063c547335d/types.d.ts#L9108">types.d.ts:9108</a></li></ul></aside></section><section class="tsd-panel tsd-member"><a id="strategyname" class="tsd-anchor"></a><h3 class="tsd-anchor-link"><span>strategy<wbr/>Name</span><a href="#strategyname" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="../assets/icons.svg#icon-anchor"></use></svg></a></h3><div class="tsd-signature"><span class="tsd-kind-property">strategyName</span><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">string</span></div><div class="tsd-comment tsd-typography"><p>Name of the strategy that was executed. Use this to demultiplex events | |
| when subscribing globally to runs across multiple strategies on the | |
| same symbol.</p> | |
| </div><div class="tsd-comment tsd-typography"></div><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/tripolskypetr/backtest-kit/blob/b46ad698ac0e7123aa3667408fbdc063c547335d/types.d.ts#L9099">types.d.ts:9099</a></li></ul></aside></section><section class="tsd-panel tsd-member"><a id="symbol" class="tsd-anchor"></a><h3 class="tsd-anchor-link"><span>symbol</span><a href="#symbol" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="../assets/icons.svg#icon-anchor"></use></svg></a></h3><div class="tsd-signature"><span class="tsd-kind-property">symbol</span><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">string</span></div><div class="tsd-comment tsd-typography"><p>Trading symbol the run was for (e.g., "BTCUSDT", "ETHUSDT"). | |
| Matches the symbol from the paired <code>BeforeStartContract</code>.</p> | |
| </div><div class="tsd-comment tsd-typography"></div><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/tripolskypetr/backtest-kit/blob/b46ad698ac0e7123aa3667408fbdc063c547335d/types.d.ts#L9093">types.d.ts:9093</a></li></ul></aside></section><section class="tsd-panel tsd-member"><a id="timestamp" class="tsd-anchor"></a><h3 class="tsd-anchor-link"><span>timestamp</span><a href="#timestamp" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="../assets/icons.svg#icon-anchor"></use></svg></a></h3><div class="tsd-signature"><span class="tsd-kind-property">timestamp</span><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">number</span></div><div class="tsd-comment tsd-typography"><p>Same value as <code>when</code>, expressed as milliseconds since the Unix epoch. | |
| Provided so subscribers can avoid calling <code>.getTime()</code> and to keep the | |
| payload trivially serialisable (e.g., for forwarding over IPC or | |
| writing to a log).</p> | |
| </div><div class="tsd-comment tsd-typography"></div><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/tripolskypetr/backtest-kit/blob/b46ad698ac0e7123aa3667408fbdc063c547335d/types.d.ts#L9140">types.d.ts:9140</a></li></ul></aside></section><section class="tsd-panel tsd-member"><a id="when" class="tsd-anchor"></a><h3 class="tsd-anchor-link"><span>when</span><a href="#when" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="../assets/icons.svg#icon-anchor"></use></svg></a></h3><div class="tsd-signature"><span class="tsd-kind-property">when</span><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">Date</span></div><div class="tsd-comment tsd-typography"><p>Event time as a <code>Date</code> instance.</p> | |
| <p>In backtest: cursor position from <code>TimeMetaService</code> at completion (the | |
| time of the last processed candle), with fallback to the frame's | |
| planned start date if no candle was processed.</p> | |
| <p>In live: wall-clock now, aligned to 1-minute boundary.</p> | |
| <p>Always equal to <code>new Date(timestamp)</code>.</p> | |
| </div><div class="tsd-comment tsd-typography"></div><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/tripolskypetr/backtest-kit/blob/b46ad698ac0e7123aa3667408fbdc063c547335d/types.d.ts#L9133">types.d.ts:9133</a></li></ul></aside></section></section></details></div><div class="col-sidebar"><div class="page-menu"><div class="tsd-navigation settings"><details class="tsd-accordion"><summary class="tsd-accordion-summary"><h3><svg width="20" height="20" viewBox="0 0 24 24" fill="none" aria-hidden="true"><use href="../assets/icons.svg#icon-chevronDown"></use></svg>Settings</h3></summary><div class="tsd-accordion-details"><div class="tsd-filter-visibility"><span class="settings-label">Member Visibility</span><ul id="tsd-filter-options"><li class="tsd-filter-item"><label class="tsd-filter-input"><input type="checkbox" id="tsd-filter-protected" name="protected"/><svg width="32" height="32" viewBox="0 0 32 32" aria-hidden="true"><rect class="tsd-checkbox-background" width="30" height="30" x="1" y="1" rx="6" fill="none"></rect><path class="tsd-checkbox-checkmark" d="M8.35422 16.8214L13.2143 21.75L24.6458 10.25" stroke="none" stroke-width="3.5" stroke-linejoin="round" fill="none"></path></svg><span>Protected</span></label></li><li class="tsd-filter-item"><label class="tsd-filter-input"><input type="checkbox" id="tsd-filter-inherited" name="inherited" checked/><svg width="32" height="32" viewBox="0 0 32 32" aria-hidden="true"><rect class="tsd-checkbox-background" width="30" height="30" x="1" y="1" rx="6" fill="none"></rect><path class="tsd-checkbox-checkmark" d="M8.35422 16.8214L13.2143 21.75L24.6458 10.25" stroke="none" stroke-width="3.5" stroke-linejoin="round" fill="none"></path></svg><span>Inherited</span></label></li><li class="tsd-filter-item"><label class="tsd-filter-input"><input type="checkbox" id="tsd-filter-external" name="external"/><svg width="32" height="32" viewBox="0 0 32 32" aria-hidden="true"><rect class="tsd-checkbox-background" width="30" height="30" x="1" y="1" rx="6" fill="none"></rect><path class="tsd-checkbox-checkmark" d="M8.35422 16.8214L13.2143 21.75L24.6458 10.25" stroke="none" stroke-width="3.5" stroke-linejoin="round" fill="none"></path></svg><span>External</span></label></li></ul></div><div class="tsd-theme-toggle"><label class="settings-label" for="tsd-theme">Theme</label><select id="tsd-theme"><option value="os">OS</option><option value="light">Light</option><option value="dark">Dark</option></select></div></div></details></div><details open class="tsd-accordion tsd-page-navigation"><summary class="tsd-accordion-summary"><h3><svg width="20" height="20" viewBox="0 0 24 24" fill="none" aria-hidden="true"><use href="../assets/icons.svg#icon-chevronDown"></use></svg>On This Page</h3></summary><div class="tsd-accordion-details"><details open class="tsd-accordion tsd-page-navigation-section"><summary class="tsd-accordion-summary" data-key="section-Properties"><svg width="20" height="20" viewBox="0 0 24 24" fill="none" aria-hidden="true"><use href="../assets/icons.svg#icon-chevronDown"></use></svg>Properties</summary><div><a href="#backtest" class=""><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>backtest</span></a><a href="#currentprice" class=""><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>current<wbr/>Price</span></a><a href="#exchangename" class=""><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>exchange<wbr/>Name</span></a><a href="#framename" class=""><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>frame<wbr/>Name</span></a><a href="#strategyname" class=""><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>strategy<wbr/>Name</span></a><a href="#symbol" class=""><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>symbol</span></a><a href="#timestamp" class=""><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>timestamp</span></a><a href="#when" class=""><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>when</span></a></div></details></div></details></div><div class="site-menu"><nav class="tsd-navigation"><a href="../modules.html">backtest-kit</a><ul class="tsd-small-nested-navigation" id="tsd-nav-container"><li>Loading...</li></ul></nav></div></div></div><footer><p class="tsd-generator">Generated using <a href="https://typedoc.org/" target="_blank">TypeDoc</a></p></footer><div class="overlay"></div></body></html> | |
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