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<li class="navelem"><a class="el" href="dir_a62226f9e3a6c7c5a3be455e2f87ae01.html">xrpld</a></li><li class="navelem"><a class="el" href="dir_c69db3203fa08a9ff994909ba6ee9783.html">app</a></li><li class="navelem"><a class="el" href="dir_2860c73e71f9ef894ba4acb1eeae5483.html">misc</a></li> </ul>
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<div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="preprocessor">#pragma once</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span> </div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="preprocessor">#include &lt;xrpl/basics/Log.h&gt;</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="preprocessor">#include &lt;xrpl/basics/Number.h&gt;</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="preprocessor">#include &lt;xrpl/beast/utility/Journal.h&gt;</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="preprocessor">#include &lt;xrpl/protocol/AMMCore.h&gt;</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="preprocessor">#include &lt;xrpl/protocol/AmountConversions.h&gt;</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="preprocessor">#include &lt;xrpl/protocol/Feature.h&gt;</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="preprocessor">#include &lt;xrpl/protocol/IOUAmount.h&gt;</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="preprocessor">#include &lt;xrpl/protocol/Issue.h&gt;</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="preprocessor">#include &lt;xrpl/protocol/Quality.h&gt;</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="preprocessor">#include &lt;xrpl/protocol/Rules.h&gt;</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="preprocessor">#include &lt;xrpl/protocol/STAmount.h&gt;</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span> </div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespacexrpl.html">xrpl</a> {</div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span> </div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="keyword">namespace </span>detail {</div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span> </div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span>Number</div>
<div class="foldopen" id="foldopen00020" data-start="{" data-end="}">
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"><a class="line" href="namespacexrpl_1_1detail.html#a21d650c348c672943bc1f72867a05f79"> 20</a></span><a class="code hl_function" href="namespacexrpl_1_1detail.html#a21d650c348c672943bc1f72867a05f79">reduceOffer</a>(<span class="keyword">auto</span> <span class="keyword">const</span>&amp; amount)</div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span>{</div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span> <span class="keyword">static</span> <a class="code hl_class" href="classxrpl_1_1Number.html">Number</a> <span class="keyword">const</span> reducedOfferPct(9999, -4);</div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span> </div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span> <span class="comment">// Make sure the result is always less than amount or zero.</span></div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span> <a class="code hl_class" href="classxrpl_1_1NumberRoundModeGuard.html">NumberRoundModeGuard</a> mg(<a class="code hl_enumvalue" href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95aa0120ec63f8c549bc0bf1c945e36e779">Number::towards_zero</a>);</div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> <span class="keywordflow">return</span> amount * reducedOfferPct;</div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span>}</div>
</div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span> </div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span>} <span class="comment">// namespace detail</span></div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span> </div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"><a class="line" href="namespacexrpl.html#a36f952e305630142ea1bb1946a6dd383"> 31</a></span><span class="keyword">enum class</span> <a class="code hl_enumeration" href="namespacexrpl.html#a36f952e305630142ea1bb1946a6dd383">IsDeposit</a> : <span class="keywordtype">bool</span> { <a class="code hl_enumvalue" href="namespacexrpl.html#a53be00cb856ef39ec60e33cf9694b5ebabafd7322c6e97d25b6299b5d6fe8920b">No</a> = <span class="keyword">false</span>, <a class="code hl_enumvalue" href="namespacexrpl.html#a53be00cb856ef39ec60e33cf9694b5eba93cba07454f06a4a960172bbd6e2a435">Yes</a> = <span class="keyword">true</span> };</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> </div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span>STAmount</div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span><a class="code hl_function" href="namespacexrpl.html#a6226af7a6f73b543e77694e5b163673b">ammLPTokens</a>(STAmount <span class="keyword">const</span>&amp; asset1, STAmount <span class="keyword">const</span>&amp; asset2, Issue <span class="keyword">const</span>&amp; lptIssue);</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> </div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span>STAmount</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span><a class="code hl_function" href="namespacexrpl.html#af922435a5bf5d571d5c2ea04c81b6cb1">lpTokensOut</a>(</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> STAmount <span class="keyword">const</span>&amp; asset1Balance,</div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> STAmount <span class="keyword">const</span>&amp; asset1Deposit,</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> STAmount <span class="keyword">const</span>&amp; lptAMMBalance,</div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint16_t</a> tfee);</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> </div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span>STAmount</div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span><a class="code hl_function" href="namespacexrpl.html#abdbadb99f2819d335af25338059c024d">ammAssetIn</a>(STAmount <span class="keyword">const</span>&amp; asset1Balance, STAmount <span class="keyword">const</span>&amp; lptAMMBalance, STAmount <span class="keyword">const</span>&amp; lpTokens, <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint16_t</a> tfee);</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> </div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span>STAmount</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span><a class="code hl_function" href="namespacexrpl.html#acbd9269cc6ee148cc8fe816d4f57a399">lpTokensIn</a>(</div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> STAmount <span class="keyword">const</span>&amp; asset1Balance,</div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> STAmount <span class="keyword">const</span>&amp; asset1Withdraw,</div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> STAmount <span class="keyword">const</span>&amp; lptAMMBalance,</div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint16_t</a> tfee);</div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> </div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span>STAmount</div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span><a class="code hl_function" href="namespacexrpl.html#a65b880854f3adbafe7196ad6e07cacc0">ammAssetOut</a>(STAmount <span class="keyword">const</span>&amp; assetBalance, STAmount <span class="keyword">const</span>&amp; lptAMMBalance, STAmount <span class="keyword">const</span>&amp; lpTokens, <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint16_t</a> tfee);</div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span> </div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span><span class="keyword">inline</span> <span class="keywordtype">bool</span></div>
<div class="foldopen" id="foldopen00098" data-start="{" data-end="}">
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"><a class="line" href="namespacexrpl.html#ad64c4c59078876e1cf6f5c7203f815e0"> 98</a></span><a class="code hl_function" href="namespacexrpl.html#ad64c4c59078876e1cf6f5c7203f815e0">withinRelativeDistance</a>(Quality <span class="keyword">const</span>&amp; calcQuality, Quality <span class="keyword">const</span>&amp; reqQuality, <a class="code hl_class" href="classxrpl_1_1Number.html">Number</a> <span class="keyword">const</span>&amp; dist)</div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span>{</div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span> <span class="keywordflow">if</span> (calcQuality == reqQuality)</div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> <span class="keyword">auto</span> <span class="keyword">const</span> [min, max] = <a class="code hl_functionRef" href="http://en.cppreference.com/w/cpp/algorithm/minmax.html">std::minmax</a>(calcQuality, reqQuality);</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> <span class="comment">// Relative distance is (max - min)/max. Can&#39;t use basic operations</span></div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> <span class="comment">// on Quality. Have to use Quality::rate() instead, which</span></div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> <span class="comment">// is inverse of quality: (1/max.rate - 1/min.rate)/(1/max.rate)</span></div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> <span class="keywordflow">return</span> ((min.rate() - max.rate()) / min.rate()) &lt; dist;</div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span>}</div>
</div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> </div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span><span class="comment">// clang-format off</span></div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> Amt&gt;</div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> <span class="keyword">requires</span>(</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> <a class="code hl_variableRef" href="http://en.cppreference.com/w/cpp/types/is_same.html">std::is_same_v&lt;Amt, STAmount&gt;</a> || <a class="code hl_variableRef" href="http://en.cppreference.com/w/cpp/types/is_same.html">std::is_same_v&lt;Amt, IOUAmount&gt;</a> ||</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span> <a class="code hl_variableRef" href="http://en.cppreference.com/w/cpp/types/is_same.html">std::is_same_v&lt;Amt, XRPAmount&gt;</a> || <a class="code hl_variableRef" href="http://en.cppreference.com/w/cpp/types/is_same.html">std::is_same_v&lt;Amt, Number&gt;</a>)</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span><span class="keywordtype">bool</span></div>
<div class="foldopen" id="foldopen00122" data-start="{" data-end="}">
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"><a class="line" href="namespacexrpl.html#acd39d384da289dc7e5fda7a7e79c411d"> 122</a></span><a class="code hl_function" href="namespacexrpl.html#ad64c4c59078876e1cf6f5c7203f815e0">withinRelativeDistance</a>(Amt <span class="keyword">const</span>&amp; calc, Amt <span class="keyword">const</span>&amp; req, <a class="code hl_class" href="classxrpl_1_1Number.html">Number</a> <span class="keyword">const</span>&amp; dist)</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span>{</div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span> <span class="keywordflow">if</span> (calc == req)</div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span> <span class="keyword">auto</span> <span class="keyword">const</span> [min, max] = <a class="code hl_functionRef" href="http://en.cppreference.com/w/cpp/algorithm/minmax.html">std::minmax</a>(calc, req);</div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"> 127</span> <span class="keywordflow">return</span> ((max - min) / max) &lt; dist;</div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span>}</div>
</div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span><span class="comment">// clang-format on</span></div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"> 130</span> </div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span><a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/utility/optional.html">std::optional&lt;Number&gt;</a></div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span><a class="code hl_function" href="namespacexrpl.html#aa9ebaa68ee1380436934e0e1ab2068b2">solveQuadraticEqSmallest</a>(Number <span class="keyword">const</span>&amp; a, Number <span class="keyword">const</span>&amp; b, Number <span class="keyword">const</span>&amp; c);</div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span> </div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno"> 160</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> TIn, <span class="keyword">typename</span> TOut&gt;</div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno"> 161</span><a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/utility/optional.html">std::optional&lt;TAmounts&lt;TIn, TOut&gt;</a>&gt;</div>
<div class="foldopen" id="foldopen00162" data-start="{" data-end="}">
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno"><a class="line" href="namespacexrpl.html#a7e9da650aacdf189f9443bd2aaf976ed"> 162</a></span><a class="code hl_function" href="namespacexrpl.html#a7e9da650aacdf189f9443bd2aaf976ed">getAMMOfferStartWithTakerGets</a>(TAmounts&lt;TIn, TOut&gt; <span class="keyword">const</span>&amp; pool, Quality <span class="keyword">const</span>&amp; targetQuality, <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint16_t</a> <span class="keyword">const</span>&amp; tfee)</div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno"> 163</span>{</div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno"> 164</span> <span class="keywordflow">if</span> (targetQuality.rate() == beast::zero)</div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno"> 165</span> <span class="keywordflow">return</span> <a class="code hl_variableRef" href="http://en.cppreference.com/w/cpp/types/is_same.html">std::nullopt</a>;</div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno"> 166</span> </div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno"> 167</span> <a class="code hl_class" href="classxrpl_1_1NumberRoundModeGuard.html">NumberRoundModeGuard</a> mg(<a class="code hl_enumvalue" href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95aa1683b7e2939668142366896b111931a">Number::to_nearest</a>);</div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno"> 168</span> <span class="keyword">auto</span> <span class="keyword">const</span> f = <a class="code hl_function" href="namespacexrpl.html#aa0a361beb4e49cb6a4653ec984d997dc">feeMult</a>(tfee);</div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno"> 169</span> <span class="keyword">auto</span> <span class="keyword">const</span> a = 1;</div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno"> 170</span> <span class="keyword">auto</span> <span class="keyword">const</span> b = pool.in * (1 - 1 / f) / targetQuality.rate() - 2 * pool.out;</div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno"> 171</span> <span class="keyword">auto</span> <span class="keyword">const</span> c = pool.out * pool.out - (pool.in * pool.out) / targetQuality.rate();</div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno"> 172</span> </div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno"> 173</span> <span class="keyword">auto</span> nTakerGets = <a class="code hl_function" href="namespacexrpl.html#aa9ebaa68ee1380436934e0e1ab2068b2">solveQuadraticEqSmallest</a>(a, b, c);</div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno"> 174</span> <span class="keywordflow">if</span> (!nTakerGets || *nTakerGets &lt;= 0)</div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno"> 175</span> <span class="keywordflow">return</span> <a class="code hl_variableRef" href="http://en.cppreference.com/w/cpp/types/is_same.html">std::nullopt</a>; <span class="comment">// LCOV_EXCL_LINE</span></div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno"> 176</span> </div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno"> 177</span> <span class="keyword">auto</span> <span class="keyword">const</span> nTakerGetsConstraint = pool.out - pool.in / (targetQuality.rate() * f);</div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno"> 178</span> <span class="keywordflow">if</span> (nTakerGetsConstraint &lt;= 0)</div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno"> 179</span> <span class="keywordflow">return</span> <a class="code hl_variableRef" href="http://en.cppreference.com/w/cpp/types/is_same.html">std::nullopt</a>;</div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno"> 180</span> </div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno"> 181</span> <span class="comment">// Select the smallest to maximize the quality</span></div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno"> 182</span> <span class="keywordflow">if</span> (nTakerGetsConstraint &lt; *nTakerGets)</div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno"> 183</span> nTakerGets = nTakerGetsConstraint;</div>
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno"> 184</span> </div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno"> 185</span> <span class="keyword">auto</span> getAmounts = [&amp;pool, &amp;tfee](<a class="code hl_class" href="classxrpl_1_1Number.html">Number</a> <span class="keyword">const</span>&amp; nTakerGetsProposed) {</div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno"> 186</span> <span class="comment">// Round downward to minimize the offer and to maximize the quality.</span></div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno"> 187</span> <span class="comment">// This has the most impact when takerGets is XRP.</span></div>
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno"> 188</span> <span class="keyword">auto</span> <span class="keyword">const</span> takerGets = toAmount&lt;TOut&gt;(<a class="code hl_function" href="namespacexrpl.html#afa772eaaed7a3a30339e41dddb0d3d3a">getIssue</a>(pool.out), nTakerGetsProposed, <a class="code hl_enumvalue" href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95aefac6c5bd63a85dcee4fc69baf788d40">Number::downward</a>);</div>
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno"> 189</span> <span class="keywordflow">return</span> TAmounts&lt;TIn, TOut&gt;{<a class="code hl_function" href="namespacexrpl.html#acd8dcc2ff08382ec2b1e01fa2749a25b">swapAssetOut</a>(pool, takerGets, tfee), takerGets};</div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno"> 190</span> };</div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno"> 191</span> </div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno"> 192</span> <span class="comment">// Try to reduce the offer size to improve the quality.</span></div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno"> 193</span> <span class="comment">// The quality might still not match the targetQuality for a tiny offer.</span></div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno"> 194</span> <span class="keywordflow">if</span> (<span class="keyword">auto</span> <span class="keyword">const</span> amounts = getAmounts(*nTakerGets); Quality{amounts} &lt; targetQuality)</div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno"> 195</span> <span class="keywordflow">return</span> getAmounts(<a class="code hl_function" href="namespacexrpl_1_1detail.html#a21d650c348c672943bc1f72867a05f79">detail::reduceOffer</a>(amounts.out));</div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno"> 196</span> <span class="keywordflow">else</span></div>
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno"> 197</span> <span class="keywordflow">return</span> amounts;</div>
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno"> 198</span>}</div>
</div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno"> 199</span> </div>
<div class="line"><a id="l00223" name="l00223"></a><span class="lineno"> 223</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> TIn, <span class="keyword">typename</span> TOut&gt;</div>
<div class="line"><a id="l00224" name="l00224"></a><span class="lineno"> 224</span><a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/utility/optional.html">std::optional&lt;TAmounts&lt;TIn, TOut&gt;</a>&gt;</div>
<div class="foldopen" id="foldopen00225" data-start="{" data-end="}">
<div class="line"><a id="l00225" name="l00225"></a><span class="lineno"><a class="line" href="namespacexrpl.html#a9637d51d13101c99b44d26f7484a6f9c"> 225</a></span><a class="code hl_function" href="namespacexrpl.html#a9637d51d13101c99b44d26f7484a6f9c">getAMMOfferStartWithTakerPays</a>(TAmounts&lt;TIn, TOut&gt; <span class="keyword">const</span>&amp; pool, Quality <span class="keyword">const</span>&amp; targetQuality, <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint16_t</a> tfee)</div>
<div class="line"><a id="l00226" name="l00226"></a><span class="lineno"> 226</span>{</div>
<div class="line"><a id="l00227" name="l00227"></a><span class="lineno"> 227</span> <span class="keywordflow">if</span> (targetQuality.rate() == beast::zero)</div>
<div class="line"><a id="l00228" name="l00228"></a><span class="lineno"> 228</span> <span class="keywordflow">return</span> <a class="code hl_variableRef" href="http://en.cppreference.com/w/cpp/types/is_same.html">std::nullopt</a>;</div>
<div class="line"><a id="l00229" name="l00229"></a><span class="lineno"> 229</span> </div>
<div class="line"><a id="l00230" name="l00230"></a><span class="lineno"> 230</span> <a class="code hl_class" href="classxrpl_1_1NumberRoundModeGuard.html">NumberRoundModeGuard</a> mg(<a class="code hl_enumvalue" href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95aa1683b7e2939668142366896b111931a">Number::to_nearest</a>);</div>
<div class="line"><a id="l00231" name="l00231"></a><span class="lineno"> 231</span> <span class="keyword">auto</span> <span class="keyword">const</span> f = <a class="code hl_function" href="namespacexrpl.html#aa0a361beb4e49cb6a4653ec984d997dc">feeMult</a>(tfee);</div>
<div class="line"><a id="l00232" name="l00232"></a><span class="lineno"> 232</span> <span class="keyword">auto</span> <span class="keyword">const</span>&amp; a = f;</div>
<div class="line"><a id="l00233" name="l00233"></a><span class="lineno"> 233</span> <span class="keyword">auto</span> <span class="keyword">const</span> b = pool.in * (1 + f);</div>
<div class="line"><a id="l00234" name="l00234"></a><span class="lineno"> 234</span> <span class="keyword">auto</span> <span class="keyword">const</span> c = pool.in * pool.in - pool.in * pool.out * targetQuality.rate();</div>
<div class="line"><a id="l00235" name="l00235"></a><span class="lineno"> 235</span> </div>
<div class="line"><a id="l00236" name="l00236"></a><span class="lineno"> 236</span> <span class="keyword">auto</span> nTakerPays = <a class="code hl_function" href="namespacexrpl.html#aa9ebaa68ee1380436934e0e1ab2068b2">solveQuadraticEqSmallest</a>(a, b, c);</div>
<div class="line"><a id="l00237" name="l00237"></a><span class="lineno"> 237</span> <span class="keywordflow">if</span> (!nTakerPays || nTakerPays &lt;= 0)</div>
<div class="line"><a id="l00238" name="l00238"></a><span class="lineno"> 238</span> <span class="keywordflow">return</span> <a class="code hl_variableRef" href="http://en.cppreference.com/w/cpp/types/is_same.html">std::nullopt</a>; <span class="comment">// LCOV_EXCL_LINE</span></div>
<div class="line"><a id="l00239" name="l00239"></a><span class="lineno"> 239</span> </div>
<div class="line"><a id="l00240" name="l00240"></a><span class="lineno"> 240</span> <span class="keyword">auto</span> <span class="keyword">const</span> nTakerPaysConstraint = pool.out * targetQuality.rate() - pool.in / f;</div>
<div class="line"><a id="l00241" name="l00241"></a><span class="lineno"> 241</span> <span class="keywordflow">if</span> (nTakerPaysConstraint &lt;= 0)</div>
<div class="line"><a id="l00242" name="l00242"></a><span class="lineno"> 242</span> <span class="keywordflow">return</span> <a class="code hl_variableRef" href="http://en.cppreference.com/w/cpp/types/is_same.html">std::nullopt</a>;</div>
<div class="line"><a id="l00243" name="l00243"></a><span class="lineno"> 243</span> </div>
<div class="line"><a id="l00244" name="l00244"></a><span class="lineno"> 244</span> <span class="comment">// Select the smallest to maximize the quality</span></div>
<div class="line"><a id="l00245" name="l00245"></a><span class="lineno"> 245</span> <span class="keywordflow">if</span> (nTakerPaysConstraint &lt; *nTakerPays)</div>
<div class="line"><a id="l00246" name="l00246"></a><span class="lineno"> 246</span> nTakerPays = nTakerPaysConstraint;</div>
<div class="line"><a id="l00247" name="l00247"></a><span class="lineno"> 247</span> </div>
<div class="line"><a id="l00248" name="l00248"></a><span class="lineno"> 248</span> <span class="keyword">auto</span> getAmounts = [&amp;pool, &amp;tfee](<a class="code hl_class" href="classxrpl_1_1Number.html">Number</a> <span class="keyword">const</span>&amp; nTakerPaysProposed) {</div>
<div class="line"><a id="l00249" name="l00249"></a><span class="lineno"> 249</span> <span class="comment">// Round downward to minimize the offer and to maximize the quality.</span></div>
<div class="line"><a id="l00250" name="l00250"></a><span class="lineno"> 250</span> <span class="comment">// This has the most impact when takerPays is XRP.</span></div>
<div class="line"><a id="l00251" name="l00251"></a><span class="lineno"> 251</span> <span class="keyword">auto</span> <span class="keyword">const</span> takerPays = toAmount&lt;TIn&gt;(<a class="code hl_function" href="namespacexrpl.html#afa772eaaed7a3a30339e41dddb0d3d3a">getIssue</a>(pool.in), nTakerPaysProposed, <a class="code hl_enumvalue" href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95aefac6c5bd63a85dcee4fc69baf788d40">Number::downward</a>);</div>
<div class="line"><a id="l00252" name="l00252"></a><span class="lineno"> 252</span> <span class="keywordflow">return</span> TAmounts&lt;TIn, TOut&gt;{takerPays, <a class="code hl_function" href="namespacexrpl.html#a5f8d3cff236ddbd2cbf77a2ef664f877">swapAssetIn</a>(pool, takerPays, tfee)};</div>
<div class="line"><a id="l00253" name="l00253"></a><span class="lineno"> 253</span> };</div>
<div class="line"><a id="l00254" name="l00254"></a><span class="lineno"> 254</span> </div>
<div class="line"><a id="l00255" name="l00255"></a><span class="lineno"> 255</span> <span class="comment">// Try to reduce the offer size to improve the quality.</span></div>
<div class="line"><a id="l00256" name="l00256"></a><span class="lineno"> 256</span> <span class="comment">// The quality might still not match the targetQuality for a tiny offer.</span></div>
<div class="line"><a id="l00257" name="l00257"></a><span class="lineno"> 257</span> <span class="keywordflow">if</span> (<span class="keyword">auto</span> <span class="keyword">const</span> amounts = getAmounts(*nTakerPays); Quality{amounts} &lt; targetQuality)</div>
<div class="line"><a id="l00258" name="l00258"></a><span class="lineno"> 258</span> <span class="keywordflow">return</span> getAmounts(<a class="code hl_function" href="namespacexrpl_1_1detail.html#a21d650c348c672943bc1f72867a05f79">detail::reduceOffer</a>(amounts.in));</div>
<div class="line"><a id="l00259" name="l00259"></a><span class="lineno"> 259</span> <span class="keywordflow">else</span></div>
<div class="line"><a id="l00260" name="l00260"></a><span class="lineno"> 260</span> <span class="keywordflow">return</span> amounts;</div>
<div class="line"><a id="l00261" name="l00261"></a><span class="lineno"> 261</span>}</div>
</div>
<div class="line"><a id="l00262" name="l00262"></a><span class="lineno"> 262</span> </div>
<div class="line"><a id="l00279" name="l00279"></a><span class="lineno"> 279</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> TIn, <span class="keyword">typename</span> TOut&gt;</div>
<div class="line"><a id="l00280" name="l00280"></a><span class="lineno"> 280</span><a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/utility/optional.html">std::optional&lt;TAmounts&lt;TIn, TOut&gt;</a>&gt;</div>
<div class="foldopen" id="foldopen00281" data-start="{" data-end="}">
<div class="line"><a id="l00281" name="l00281"></a><span class="lineno"><a class="line" href="namespacexrpl.html#aba7b68c01ad1bee502349df2eeca4ee7"> 281</a></span><a class="code hl_function" href="namespacexrpl.html#aba7b68c01ad1bee502349df2eeca4ee7">changeSpotPriceQuality</a>(</div>
<div class="line"><a id="l00282" name="l00282"></a><span class="lineno"> 282</span> TAmounts&lt;TIn, TOut&gt; <span class="keyword">const</span>&amp; pool,</div>
<div class="line"><a id="l00283" name="l00283"></a><span class="lineno"> 283</span> Quality <span class="keyword">const</span>&amp; quality,</div>
<div class="line"><a id="l00284" name="l00284"></a><span class="lineno"> 284</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint16_t</a> tfee,</div>
<div class="line"><a id="l00285" name="l00285"></a><span class="lineno"> 285</span> <a class="code hl_class" href="classxrpl_1_1Rules.html">Rules</a> <span class="keyword">const</span>&amp; rules,</div>
<div class="line"><a id="l00286" name="l00286"></a><span class="lineno"> 286</span> <a class="code hl_class" href="classbeast_1_1Journal.html">beast::Journal</a> j)</div>
<div class="line"><a id="l00287" name="l00287"></a><span class="lineno"> 287</span>{</div>
<div class="line"><a id="l00288" name="l00288"></a><span class="lineno"> 288</span> <span class="keywordflow">if</span> (!rules.<a class="code hl_function" href="classxrpl_1_1Rules.html#a125114e27f806d1517096cbee50a2b04">enabled</a>(fixAMMv1_1))</div>
<div class="line"><a id="l00289" name="l00289"></a><span class="lineno"> 289</span> {</div>
<div class="line"><a id="l00290" name="l00290"></a><span class="lineno"> 290</span> <span class="comment">// Finds takerPays (i) and takerGets (o) such that given pool</span></div>
<div class="line"><a id="l00291" name="l00291"></a><span class="lineno"> 291</span> <span class="comment">// composition poolGets(I) and poolPays(O): (O - o) / (I + i) = quality.</span></div>
<div class="line"><a id="l00292" name="l00292"></a><span class="lineno"> 292</span> <span class="comment">// Where takerGets is calculated as the swapAssetIn (see below).</span></div>
<div class="line"><a id="l00293" name="l00293"></a><span class="lineno"> 293</span> <span class="comment">// The above equation produces the quadratic equation:</span></div>
<div class="line"><a id="l00294" name="l00294"></a><span class="lineno"> 294</span> <span class="comment">// i^2*(1-fee) + i*I*(2-fee) + I^2 - I*O/quality,</span></div>
<div class="line"><a id="l00295" name="l00295"></a><span class="lineno"> 295</span> <span class="comment">// which is solved for i, and o is found with swapAssetIn().</span></div>
<div class="line"><a id="l00296" name="l00296"></a><span class="lineno"> 296</span> <span class="keyword">auto</span> <span class="keyword">const</span> f = <a class="code hl_function" href="namespacexrpl.html#aa0a361beb4e49cb6a4653ec984d997dc">feeMult</a>(tfee); <span class="comment">// 1 - fee</span></div>
<div class="line"><a id="l00297" name="l00297"></a><span class="lineno"> 297</span> <span class="keyword">auto</span> <span class="keyword">const</span>&amp; a = f;</div>
<div class="line"><a id="l00298" name="l00298"></a><span class="lineno"> 298</span> <span class="keyword">auto</span> <span class="keyword">const</span> b = pool.in * (1 + f);</div>
<div class="line"><a id="l00299" name="l00299"></a><span class="lineno"> 299</span> <a class="code hl_class" href="classxrpl_1_1Number.html">Number</a> <span class="keyword">const</span> c = pool.in * pool.in - pool.in * pool.out * quality.rate();</div>
<div class="line"><a id="l00300" name="l00300"></a><span class="lineno"> 300</span> <span class="keywordflow">if</span> (<span class="keyword">auto</span> <span class="keyword">const</span> res = b * b - 4 * a * c; res &lt; 0)</div>
<div class="line"><a id="l00301" name="l00301"></a><span class="lineno"> 301</span> <span class="keywordflow">return</span> <a class="code hl_variableRef" href="http://en.cppreference.com/w/cpp/types/is_same.html">std::nullopt</a>; <span class="comment">// LCOV_EXCL_LINE</span></div>
<div class="line"><a id="l00302" name="l00302"></a><span class="lineno"> 302</span> <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keyword">auto</span> <span class="keyword">const</span> nTakerPaysPropose = (-b + <a class="code hl_function" href="namespacexrpl.html#ab334d11f65b71b91e2c6c907090398cb">root2</a>(res)) / (2 * a); nTakerPaysPropose &gt; 0)</div>
<div class="line"><a id="l00303" name="l00303"></a><span class="lineno"> 303</span> {</div>
<div class="line"><a id="l00304" name="l00304"></a><span class="lineno"> 304</span> <span class="keyword">auto</span> <span class="keyword">const</span> nTakerPays = [&amp;]() {</div>
<div class="line"><a id="l00305" name="l00305"></a><span class="lineno"> 305</span> <span class="comment">// The fee might make the AMM offer quality less than CLOB</span></div>
<div class="line"><a id="l00306" name="l00306"></a><span class="lineno"> 306</span> <span class="comment">// quality. Therefore, AMM offer has to satisfy this constraint:</span></div>
<div class="line"><a id="l00307" name="l00307"></a><span class="lineno"> 307</span> <span class="comment">// o / i &gt;= q. Substituting o with swapAssetIn() gives: i &lt;= O /</span></div>
<div class="line"><a id="l00308" name="l00308"></a><span class="lineno"> 308</span> <span class="comment">// q - I / (1 - fee).</span></div>
<div class="line"><a id="l00309" name="l00309"></a><span class="lineno"> 309</span> <span class="keyword">auto</span> <span class="keyword">const</span> nTakerPaysConstraint = pool.out * quality.rate() - pool.in / f;</div>
<div class="line"><a id="l00310" name="l00310"></a><span class="lineno"> 310</span> <span class="keywordflow">if</span> (nTakerPaysPropose &gt; nTakerPaysConstraint)</div>
<div class="line"><a id="l00311" name="l00311"></a><span class="lineno"> 311</span> <span class="keywordflow">return</span> nTakerPaysConstraint;</div>
<div class="line"><a id="l00312" name="l00312"></a><span class="lineno"> 312</span> <span class="keywordflow">return</span> nTakerPaysPropose;</div>
<div class="line"><a id="l00313" name="l00313"></a><span class="lineno"> 313</span> }();</div>
<div class="line"><a id="l00314" name="l00314"></a><span class="lineno"> 314</span> <span class="keywordflow">if</span> (nTakerPays &lt;= 0)</div>
<div class="line"><a id="l00315" name="l00315"></a><span class="lineno"> 315</span> {</div>
<div class="line"><a id="l00316" name="l00316"></a><span class="lineno"> 316</span> JLOG(j.<a class="code hl_function" href="classbeast_1_1Journal.html#abbe082bd27ca0f1d1365af2824e4f85b">trace</a>()) &lt;&lt; <span class="stringliteral">&quot;changeSpotPriceQuality calc failed: &quot;</span> &lt;&lt; <a class="code hl_function" href="namespacexrpl.html#a35ce7572092b98720a52fa343c6f2fa9">to_string</a>(pool.in) &lt;&lt; <span class="stringliteral">&quot; &quot;</span></div>
<div class="line"><a id="l00317" name="l00317"></a><span class="lineno"> 317</span> &lt;&lt; <a class="code hl_function" href="namespacexrpl.html#a35ce7572092b98720a52fa343c6f2fa9">to_string</a>(pool.out) &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; quality &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; tfee;</div>
<div class="line"><a id="l00318" name="l00318"></a><span class="lineno"> 318</span> <span class="keywordflow">return</span> <a class="code hl_variableRef" href="http://en.cppreference.com/w/cpp/types/is_same.html">std::nullopt</a>;</div>
<div class="line"><a id="l00319" name="l00319"></a><span class="lineno"> 319</span> }</div>
<div class="line"><a id="l00320" name="l00320"></a><span class="lineno"> 320</span> <span class="keyword">auto</span> <span class="keyword">const</span> takerPays = toAmount&lt;TIn&gt;(<a class="code hl_function" href="namespacexrpl.html#afa772eaaed7a3a30339e41dddb0d3d3a">getIssue</a>(pool.in), nTakerPays, <a class="code hl_enumvalue" href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95aaf71effcd4dcf7bc7c89bb51e27e8b17">Number::upward</a>);</div>
<div class="line"><a id="l00321" name="l00321"></a><span class="lineno"> 321</span> <span class="comment">// should not fail</span></div>
<div class="line"><a id="l00322" name="l00322"></a><span class="lineno"> 322</span> <span class="keywordflow">if</span> (<span class="keyword">auto</span> <span class="keyword">const</span> amounts = TAmounts&lt;TIn, TOut&gt;{takerPays, <a class="code hl_function" href="namespacexrpl.html#a5f8d3cff236ddbd2cbf77a2ef664f877">swapAssetIn</a>(pool, takerPays, tfee)};</div>
<div class="line"><a id="l00323" name="l00323"></a><span class="lineno"> 323</span> Quality{amounts} &lt; quality &amp;&amp; !<a class="code hl_function" href="namespacexrpl.html#ad64c4c59078876e1cf6f5c7203f815e0">withinRelativeDistance</a>(Quality{amounts}, quality, <a class="code hl_class" href="classxrpl_1_1Number.html">Number</a>(1, -7)))</div>
<div class="line"><a id="l00324" name="l00324"></a><span class="lineno"> 324</span> {</div>
<div class="line"><a id="l00325" name="l00325"></a><span class="lineno"> 325</span> JLOG(j.<a class="code hl_function" href="classbeast_1_1Journal.html#a49b0713e65bb8e2c51b76fbf16252afe">error</a>()) &lt;&lt; <span class="stringliteral">&quot;changeSpotPriceQuality failed: &quot;</span> &lt;&lt; <a class="code hl_function" href="namespacexrpl.html#a35ce7572092b98720a52fa343c6f2fa9">to_string</a>(pool.in) &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; <a class="code hl_function" href="namespacexrpl.html#a35ce7572092b98720a52fa343c6f2fa9">to_string</a>(pool.out)</div>
<div class="line"><a id="l00326" name="l00326"></a><span class="lineno"> 326</span> &lt;&lt; <span class="stringliteral">&quot; &quot;</span></div>
<div class="line"><a id="l00327" name="l00327"></a><span class="lineno"> 327</span> &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; quality &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; tfee &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; <a class="code hl_function" href="namespacexrpl.html#a35ce7572092b98720a52fa343c6f2fa9">to_string</a>(amounts.in) &lt;&lt; <span class="stringliteral">&quot; &quot;</span></div>
<div class="line"><a id="l00328" name="l00328"></a><span class="lineno"> 328</span> &lt;&lt; <a class="code hl_function" href="namespacexrpl.html#a35ce7572092b98720a52fa343c6f2fa9">to_string</a>(amounts.out);</div>
<div class="line"><a id="l00329" name="l00329"></a><span class="lineno"> 329</span> Throw&lt;std::runtime_error&gt;(<span class="stringliteral">&quot;changeSpotPriceQuality failed&quot;</span>);</div>
<div class="line"><a id="l00330" name="l00330"></a><span class="lineno"> 330</span> }</div>
<div class="line"><a id="l00331" name="l00331"></a><span class="lineno"> 331</span> <span class="keywordflow">else</span></div>
<div class="line"><a id="l00332" name="l00332"></a><span class="lineno"> 332</span> {</div>
<div class="line"><a id="l00333" name="l00333"></a><span class="lineno"> 333</span> JLOG(j.<a class="code hl_function" href="classbeast_1_1Journal.html#abbe082bd27ca0f1d1365af2824e4f85b">trace</a>()) &lt;&lt; <span class="stringliteral">&quot;changeSpotPriceQuality succeeded: &quot;</span> &lt;&lt; <a class="code hl_function" href="namespacexrpl.html#a35ce7572092b98720a52fa343c6f2fa9">to_string</a>(pool.in) &lt;&lt; <span class="stringliteral">&quot; &quot;</span></div>
<div class="line"><a id="l00334" name="l00334"></a><span class="lineno"> 334</span> &lt;&lt; <a class="code hl_function" href="namespacexrpl.html#a35ce7572092b98720a52fa343c6f2fa9">to_string</a>(pool.out) &lt;&lt; <span class="stringliteral">&quot; &quot;</span></div>
<div class="line"><a id="l00335" name="l00335"></a><span class="lineno"> 335</span> &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; quality &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; tfee &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; <a class="code hl_function" href="namespacexrpl.html#a35ce7572092b98720a52fa343c6f2fa9">to_string</a>(amounts.in) &lt;&lt; <span class="stringliteral">&quot; &quot;</span></div>
<div class="line"><a id="l00336" name="l00336"></a><span class="lineno"> 336</span> &lt;&lt; <a class="code hl_function" href="namespacexrpl.html#a35ce7572092b98720a52fa343c6f2fa9">to_string</a>(amounts.out);</div>
<div class="line"><a id="l00337" name="l00337"></a><span class="lineno"> 337</span> <span class="keywordflow">return</span> amounts;</div>
<div class="line"><a id="l00338" name="l00338"></a><span class="lineno"> 338</span> }</div>
<div class="line"><a id="l00339" name="l00339"></a><span class="lineno"> 339</span> }</div>
<div class="line"><a id="l00340" name="l00340"></a><span class="lineno"> 340</span> JLOG(j.<a class="code hl_function" href="classbeast_1_1Journal.html#abbe082bd27ca0f1d1365af2824e4f85b">trace</a>()) &lt;&lt; <span class="stringliteral">&quot;changeSpotPriceQuality calc failed: &quot;</span> &lt;&lt; <a class="code hl_function" href="namespacexrpl.html#a35ce7572092b98720a52fa343c6f2fa9">to_string</a>(pool.in) &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; <a class="code hl_function" href="namespacexrpl.html#a35ce7572092b98720a52fa343c6f2fa9">to_string</a>(pool.out)</div>
<div class="line"><a id="l00341" name="l00341"></a><span class="lineno"> 341</span> &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; quality &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; tfee;</div>
<div class="line"><a id="l00342" name="l00342"></a><span class="lineno"> 342</span> <span class="keywordflow">return</span> <a class="code hl_variableRef" href="http://en.cppreference.com/w/cpp/types/is_same.html">std::nullopt</a>;</div>
<div class="line"><a id="l00343" name="l00343"></a><span class="lineno"> 343</span> }</div>
<div class="line"><a id="l00344" name="l00344"></a><span class="lineno"> 344</span> </div>
<div class="line"><a id="l00345" name="l00345"></a><span class="lineno"> 345</span> <span class="comment">// Generate the offer starting with XRP side. Return seated offer amounts</span></div>
<div class="line"><a id="l00346" name="l00346"></a><span class="lineno"> 346</span> <span class="comment">// if the offer can be generated, otherwise nullopt.</span></div>
<div class="line"><a id="l00347" name="l00347"></a><span class="lineno"> 347</span> <span class="keyword">auto</span> <span class="keyword">const</span> amounts = [&amp;]() {</div>
<div class="line"><a id="l00348" name="l00348"></a><span class="lineno"> 348</span> <span class="keywordflow">if</span> (<a class="code hl_function" href="namespacexrpl.html#a255b5518870987aa13c1a924c9900ab9">isXRP</a>(<a class="code hl_function" href="namespacexrpl.html#afa772eaaed7a3a30339e41dddb0d3d3a">getIssue</a>(pool.out)))</div>
<div class="line"><a id="l00349" name="l00349"></a><span class="lineno"> 349</span> <span class="keywordflow">return</span> <a class="code hl_function" href="namespacexrpl.html#a7e9da650aacdf189f9443bd2aaf976ed">getAMMOfferStartWithTakerGets</a>(pool, quality, tfee);</div>
<div class="line"><a id="l00350" name="l00350"></a><span class="lineno"> 350</span> <span class="keywordflow">return</span> <a class="code hl_function" href="namespacexrpl.html#a9637d51d13101c99b44d26f7484a6f9c">getAMMOfferStartWithTakerPays</a>(pool, quality, tfee);</div>
<div class="line"><a id="l00351" name="l00351"></a><span class="lineno"> 351</span> }();</div>
<div class="line"><a id="l00352" name="l00352"></a><span class="lineno"> 352</span> <span class="keywordflow">if</span> (!amounts)</div>
<div class="line"><a id="l00353" name="l00353"></a><span class="lineno"> 353</span> {</div>
<div class="line"><a id="l00354" name="l00354"></a><span class="lineno"> 354</span> JLOG(j.<a class="code hl_function" href="classbeast_1_1Journal.html#abbe082bd27ca0f1d1365af2824e4f85b">trace</a>()) &lt;&lt; <span class="stringliteral">&quot;changeSpotPrice calc failed: &quot;</span> &lt;&lt; <a class="code hl_function" href="namespacexrpl.html#a35ce7572092b98720a52fa343c6f2fa9">to_string</a>(pool.in) &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; <a class="code hl_function" href="namespacexrpl.html#a35ce7572092b98720a52fa343c6f2fa9">to_string</a>(pool.out) &lt;&lt; <span class="stringliteral">&quot; &quot;</span></div>
<div class="line"><a id="l00355" name="l00355"></a><span class="lineno"> 355</span> &lt;&lt; quality &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; tfee &lt;&lt; <a class="code hl_functionRef" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a id="l00356" name="l00356"></a><span class="lineno"> 356</span> <span class="keywordflow">return</span> <a class="code hl_variableRef" href="http://en.cppreference.com/w/cpp/types/is_same.html">std::nullopt</a>;</div>
<div class="line"><a id="l00357" name="l00357"></a><span class="lineno"> 357</span> }</div>
<div class="line"><a id="l00358" name="l00358"></a><span class="lineno"> 358</span> </div>
<div class="line"><a id="l00359" name="l00359"></a><span class="lineno"> 359</span> <span class="keywordflow">if</span> (Quality{*amounts} &lt; quality)</div>
<div class="line"><a id="l00360" name="l00360"></a><span class="lineno"> 360</span> {</div>
<div class="line"><a id="l00361" name="l00361"></a><span class="lineno"> 361</span> JLOG(j.<a class="code hl_function" href="classbeast_1_1Journal.html#a49b0713e65bb8e2c51b76fbf16252afe">error</a>()) &lt;&lt; <span class="stringliteral">&quot;changeSpotPriceQuality failed: &quot;</span> &lt;&lt; <a class="code hl_function" href="namespacexrpl.html#a35ce7572092b98720a52fa343c6f2fa9">to_string</a>(pool.in) &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; <a class="code hl_function" href="namespacexrpl.html#a35ce7572092b98720a52fa343c6f2fa9">to_string</a>(pool.out) &lt;&lt; <span class="stringliteral">&quot; &quot;</span></div>
<div class="line"><a id="l00362" name="l00362"></a><span class="lineno"> 362</span> &lt;&lt; quality &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; tfee &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; <a class="code hl_function" href="namespacexrpl.html#a35ce7572092b98720a52fa343c6f2fa9">to_string</a>(amounts-&gt;in) &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; <a class="code hl_function" href="namespacexrpl.html#a35ce7572092b98720a52fa343c6f2fa9">to_string</a>(amounts-&gt;out);</div>
<div class="line"><a id="l00363" name="l00363"></a><span class="lineno"> 363</span> <span class="keywordflow">return</span> <a class="code hl_variableRef" href="http://en.cppreference.com/w/cpp/types/is_same.html">std::nullopt</a>;</div>
<div class="line"><a id="l00364" name="l00364"></a><span class="lineno"> 364</span> }</div>
<div class="line"><a id="l00365" name="l00365"></a><span class="lineno"> 365</span> </div>
<div class="line"><a id="l00366" name="l00366"></a><span class="lineno"> 366</span> JLOG(j.<a class="code hl_function" href="classbeast_1_1Journal.html#abbe082bd27ca0f1d1365af2824e4f85b">trace</a>()) &lt;&lt; <span class="stringliteral">&quot;changeSpotPriceQuality succeeded: &quot;</span> &lt;&lt; <a class="code hl_function" href="namespacexrpl.html#a35ce7572092b98720a52fa343c6f2fa9">to_string</a>(pool.in) &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; <a class="code hl_function" href="namespacexrpl.html#a35ce7572092b98720a52fa343c6f2fa9">to_string</a>(pool.out) &lt;&lt; <span class="stringliteral">&quot; &quot;</span></div>
<div class="line"><a id="l00367" name="l00367"></a><span class="lineno"> 367</span> &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; quality &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; tfee &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; <a class="code hl_function" href="namespacexrpl.html#a35ce7572092b98720a52fa343c6f2fa9">to_string</a>(amounts-&gt;in) &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; <a class="code hl_function" href="namespacexrpl.html#a35ce7572092b98720a52fa343c6f2fa9">to_string</a>(amounts-&gt;out);</div>
<div class="line"><a id="l00368" name="l00368"></a><span class="lineno"> 368</span> </div>
<div class="line"><a id="l00369" name="l00369"></a><span class="lineno"> 369</span> <span class="keywordflow">return</span> amounts;</div>
<div class="line"><a id="l00370" name="l00370"></a><span class="lineno"> 370</span>}</div>
</div>
<div class="line"><a id="l00371" name="l00371"></a><span class="lineno"> 371</span> </div>
<div class="line"><a id="l00393" name="l00393"></a><span class="lineno"> 393</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> TIn, <span class="keyword">typename</span> TOut&gt;</div>
<div class="line"><a id="l00394" name="l00394"></a><span class="lineno"> 394</span>TOut</div>
<div class="foldopen" id="foldopen00395" data-start="{" data-end="}">
<div class="line"><a id="l00395" name="l00395"></a><span class="lineno"><a class="line" href="namespacexrpl.html#a5f8d3cff236ddbd2cbf77a2ef664f877"> 395</a></span><a class="code hl_function" href="namespacexrpl.html#a5f8d3cff236ddbd2cbf77a2ef664f877">swapAssetIn</a>(TAmounts&lt;TIn, TOut&gt; <span class="keyword">const</span>&amp; pool, TIn <span class="keyword">const</span>&amp; assetIn, <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint16_t</a> tfee)</div>
<div class="line"><a id="l00396" name="l00396"></a><span class="lineno"> 396</span>{</div>
<div class="line"><a id="l00397" name="l00397"></a><span class="lineno"> 397</span> <span class="keywordflow">if</span> (<span class="keyword">auto</span> <span class="keyword">const</span>&amp; rules = <a class="code hl_function" href="namespacexrpl.html#a5a1298fd71a9010ea3228b2ba8d46efe">getCurrentTransactionRules</a>(); rules &amp;&amp; rules-&gt;enabled(fixAMMv1_1))</div>
<div class="line"><a id="l00398" name="l00398"></a><span class="lineno"> 398</span> {</div>
<div class="line"><a id="l00399" name="l00399"></a><span class="lineno"> 399</span> <span class="comment">// set rounding to always favor the amm. Clip to zero.</span></div>
<div class="line"><a id="l00400" name="l00400"></a><span class="lineno"> 400</span> <span class="comment">// calculate:</span></div>
<div class="line"><a id="l00401" name="l00401"></a><span class="lineno"> 401</span> <span class="comment">// pool.out -</span></div>
<div class="line"><a id="l00402" name="l00402"></a><span class="lineno"> 402</span> <span class="comment">// (pool.in * pool.out) / (pool.in + assetIn * feeMult(tfee)),</span></div>
<div class="line"><a id="l00403" name="l00403"></a><span class="lineno"> 403</span> <span class="comment">// and explicitly set the rounding modes</span></div>
<div class="line"><a id="l00404" name="l00404"></a><span class="lineno"> 404</span> <span class="comment">// Favoring the amm means we should:</span></div>
<div class="line"><a id="l00405" name="l00405"></a><span class="lineno"> 405</span> <span class="comment">// minimize:</span></div>
<div class="line"><a id="l00406" name="l00406"></a><span class="lineno"> 406</span> <span class="comment">// pool.out -</span></div>
<div class="line"><a id="l00407" name="l00407"></a><span class="lineno"> 407</span> <span class="comment">// (pool.in * pool.out) / (pool.in + assetIn * feeMult(tfee)),</span></div>
<div class="line"><a id="l00408" name="l00408"></a><span class="lineno"> 408</span> <span class="comment">// maximize:</span></div>
<div class="line"><a id="l00409" name="l00409"></a><span class="lineno"> 409</span> <span class="comment">// (pool.in * pool.out) / (pool.in + assetIn * feeMult(tfee)),</span></div>
<div class="line"><a id="l00410" name="l00410"></a><span class="lineno"> 410</span> <span class="comment">// (pool.in * pool.out)</span></div>
<div class="line"><a id="l00411" name="l00411"></a><span class="lineno"> 411</span> <span class="comment">// minimize:</span></div>
<div class="line"><a id="l00412" name="l00412"></a><span class="lineno"> 412</span> <span class="comment">// (pool.in + assetIn * feeMult(tfee)),</span></div>
<div class="line"><a id="l00413" name="l00413"></a><span class="lineno"> 413</span> <span class="comment">// minimize:</span></div>
<div class="line"><a id="l00414" name="l00414"></a><span class="lineno"> 414</span> <span class="comment">// assetIn * feeMult(tfee)</span></div>
<div class="line"><a id="l00415" name="l00415"></a><span class="lineno"> 415</span> <span class="comment">// feeMult is: (1-fee), fee is tfee/100000</span></div>
<div class="line"><a id="l00416" name="l00416"></a><span class="lineno"> 416</span> <span class="comment">// minimize:</span></div>
<div class="line"><a id="l00417" name="l00417"></a><span class="lineno"> 417</span> <span class="comment">// 1-fee</span></div>
<div class="line"><a id="l00418" name="l00418"></a><span class="lineno"> 418</span> <span class="comment">// maximize:</span></div>
<div class="line"><a id="l00419" name="l00419"></a><span class="lineno"> 419</span> <span class="comment">// fee</span></div>
<div class="line"><a id="l00420" name="l00420"></a><span class="lineno"> 420</span> <a class="code hl_class" href="classxrpl_1_1saveNumberRoundMode.html">saveNumberRoundMode</a> _{<a class="code hl_function" href="classxrpl_1_1Number.html#a0c71d26d6de400ed12cf3923157aca31">Number::getround</a>()};</div>
<div class="line"><a id="l00421" name="l00421"></a><span class="lineno"> 421</span> </div>
<div class="line"><a id="l00422" name="l00422"></a><span class="lineno"> 422</span> <a class="code hl_function" href="classxrpl_1_1Number.html#a274b459d7478df80795caed8a56d4f00">Number::setround</a>(<a class="code hl_enumvalue" href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95aaf71effcd4dcf7bc7c89bb51e27e8b17">Number::upward</a>);</div>
<div class="line"><a id="l00423" name="l00423"></a><span class="lineno"> 423</span> <span class="keyword">auto</span> <span class="keyword">const</span> numerator = pool.in * pool.out;</div>
<div class="line"><a id="l00424" name="l00424"></a><span class="lineno"> 424</span> <span class="keyword">auto</span> <span class="keyword">const</span> fee = <a class="code hl_function" href="namespacexrpl.html#acc61573879eaa546a305cad60f2de28b">getFee</a>(tfee);</div>
<div class="line"><a id="l00425" name="l00425"></a><span class="lineno"> 425</span> </div>
<div class="line"><a id="l00426" name="l00426"></a><span class="lineno"> 426</span> <a class="code hl_function" href="classxrpl_1_1Number.html#a274b459d7478df80795caed8a56d4f00">Number::setround</a>(<a class="code hl_enumvalue" href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95aefac6c5bd63a85dcee4fc69baf788d40">Number::downward</a>);</div>
<div class="line"><a id="l00427" name="l00427"></a><span class="lineno"> 427</span> <span class="keyword">auto</span> <span class="keyword">const</span> denom = pool.in + assetIn * (1 - fee);</div>
<div class="line"><a id="l00428" name="l00428"></a><span class="lineno"> 428</span> </div>
<div class="line"><a id="l00429" name="l00429"></a><span class="lineno"> 429</span> <span class="keywordflow">if</span> (denom.signum() &lt;= 0)</div>
<div class="line"><a id="l00430" name="l00430"></a><span class="lineno"> 430</span> <span class="keywordflow">return</span> toAmount&lt;TOut&gt;(<a class="code hl_function" href="namespacexrpl.html#afa772eaaed7a3a30339e41dddb0d3d3a">getIssue</a>(pool.out), 0);</div>
<div class="line"><a id="l00431" name="l00431"></a><span class="lineno"> 431</span> </div>
<div class="line"><a id="l00432" name="l00432"></a><span class="lineno"> 432</span> <a class="code hl_function" href="classxrpl_1_1Number.html#a274b459d7478df80795caed8a56d4f00">Number::setround</a>(<a class="code hl_enumvalue" href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95aaf71effcd4dcf7bc7c89bb51e27e8b17">Number::upward</a>);</div>
<div class="line"><a id="l00433" name="l00433"></a><span class="lineno"> 433</span> <span class="keyword">auto</span> <span class="keyword">const</span> ratio = numerator / denom;</div>
<div class="line"><a id="l00434" name="l00434"></a><span class="lineno"> 434</span> </div>
<div class="line"><a id="l00435" name="l00435"></a><span class="lineno"> 435</span> <a class="code hl_function" href="classxrpl_1_1Number.html#a274b459d7478df80795caed8a56d4f00">Number::setround</a>(<a class="code hl_enumvalue" href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95aefac6c5bd63a85dcee4fc69baf788d40">Number::downward</a>);</div>
<div class="line"><a id="l00436" name="l00436"></a><span class="lineno"> 436</span> <span class="keyword">auto</span> <span class="keyword">const</span> swapOut = pool.out - ratio;</div>
<div class="line"><a id="l00437" name="l00437"></a><span class="lineno"> 437</span> </div>
<div class="line"><a id="l00438" name="l00438"></a><span class="lineno"> 438</span> <span class="keywordflow">if</span> (swapOut.signum() &lt; 0)</div>
<div class="line"><a id="l00439" name="l00439"></a><span class="lineno"> 439</span> <span class="keywordflow">return</span> toAmount&lt;TOut&gt;(<a class="code hl_function" href="namespacexrpl.html#afa772eaaed7a3a30339e41dddb0d3d3a">getIssue</a>(pool.out), 0);</div>
<div class="line"><a id="l00440" name="l00440"></a><span class="lineno"> 440</span> </div>
<div class="line"><a id="l00441" name="l00441"></a><span class="lineno"> 441</span> <span class="keywordflow">return</span> toAmount&lt;TOut&gt;(<a class="code hl_function" href="namespacexrpl.html#afa772eaaed7a3a30339e41dddb0d3d3a">getIssue</a>(pool.out), swapOut, <a class="code hl_enumvalue" href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95aefac6c5bd63a85dcee4fc69baf788d40">Number::downward</a>);</div>
<div class="line"><a id="l00442" name="l00442"></a><span class="lineno"> 442</span> }</div>
<div class="line"><a id="l00443" name="l00443"></a><span class="lineno"> 443</span> <span class="keywordflow">else</span></div>
<div class="line"><a id="l00444" name="l00444"></a><span class="lineno"> 444</span> {</div>
<div class="line"><a id="l00445" name="l00445"></a><span class="lineno"> 445</span> <span class="keywordflow">return</span> toAmount&lt;TOut&gt;(</div>
<div class="line"><a id="l00446" name="l00446"></a><span class="lineno"> 446</span> <a class="code hl_function" href="namespacexrpl.html#afa772eaaed7a3a30339e41dddb0d3d3a">getIssue</a>(pool.out),</div>
<div class="line"><a id="l00447" name="l00447"></a><span class="lineno"> 447</span> pool.out - (pool.in * pool.out) / (pool.in + assetIn * <a class="code hl_function" href="namespacexrpl.html#aa0a361beb4e49cb6a4653ec984d997dc">feeMult</a>(tfee)),</div>
<div class="line"><a id="l00448" name="l00448"></a><span class="lineno"> 448</span> <a class="code hl_enumvalue" href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95aefac6c5bd63a85dcee4fc69baf788d40">Number::downward</a>);</div>
<div class="line"><a id="l00449" name="l00449"></a><span class="lineno"> 449</span> }</div>
<div class="line"><a id="l00450" name="l00450"></a><span class="lineno"> 450</span>}</div>
</div>
<div class="line"><a id="l00451" name="l00451"></a><span class="lineno"> 451</span> </div>
<div class="line"><a id="l00461" name="l00461"></a><span class="lineno"> 461</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> TIn, <span class="keyword">typename</span> TOut&gt;</div>
<div class="line"><a id="l00462" name="l00462"></a><span class="lineno"> 462</span>TIn</div>
<div class="foldopen" id="foldopen00463" data-start="{" data-end="}">
<div class="line"><a id="l00463" name="l00463"></a><span class="lineno"><a class="line" href="namespacexrpl.html#acd8dcc2ff08382ec2b1e01fa2749a25b"> 463</a></span><a class="code hl_function" href="namespacexrpl.html#acd8dcc2ff08382ec2b1e01fa2749a25b">swapAssetOut</a>(TAmounts&lt;TIn, TOut&gt; <span class="keyword">const</span>&amp; pool, TOut <span class="keyword">const</span>&amp; assetOut, <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint16_t</a> tfee)</div>
<div class="line"><a id="l00464" name="l00464"></a><span class="lineno"> 464</span>{</div>
<div class="line"><a id="l00465" name="l00465"></a><span class="lineno"> 465</span> <span class="keywordflow">if</span> (<span class="keyword">auto</span> <span class="keyword">const</span>&amp; rules = <a class="code hl_function" href="namespacexrpl.html#a5a1298fd71a9010ea3228b2ba8d46efe">getCurrentTransactionRules</a>(); rules &amp;&amp; rules-&gt;enabled(fixAMMv1_1))</div>
<div class="line"><a id="l00466" name="l00466"></a><span class="lineno"> 466</span> {</div>
<div class="line"><a id="l00467" name="l00467"></a><span class="lineno"> 467</span> <span class="comment">// set rounding to always favor the amm. Clip to zero.</span></div>
<div class="line"><a id="l00468" name="l00468"></a><span class="lineno"> 468</span> <span class="comment">// calculate:</span></div>
<div class="line"><a id="l00469" name="l00469"></a><span class="lineno"> 469</span> <span class="comment">// ((pool.in * pool.out) / (pool.out - assetOut) - pool.in) /</span></div>
<div class="line"><a id="l00470" name="l00470"></a><span class="lineno"> 470</span> <span class="comment">// (1-tfee/100000)</span></div>
<div class="line"><a id="l00471" name="l00471"></a><span class="lineno"> 471</span> <span class="comment">// maximize:</span></div>
<div class="line"><a id="l00472" name="l00472"></a><span class="lineno"> 472</span> <span class="comment">// ((pool.in * pool.out) / (pool.out - assetOut) - pool.in)</span></div>
<div class="line"><a id="l00473" name="l00473"></a><span class="lineno"> 473</span> <span class="comment">// maximize:</span></div>
<div class="line"><a id="l00474" name="l00474"></a><span class="lineno"> 474</span> <span class="comment">// (pool.in * pool.out) / (pool.out - assetOut)</span></div>
<div class="line"><a id="l00475" name="l00475"></a><span class="lineno"> 475</span> <span class="comment">// maximize:</span></div>
<div class="line"><a id="l00476" name="l00476"></a><span class="lineno"> 476</span> <span class="comment">// (pool.in * pool.out)</span></div>
<div class="line"><a id="l00477" name="l00477"></a><span class="lineno"> 477</span> <span class="comment">// minimize</span></div>
<div class="line"><a id="l00478" name="l00478"></a><span class="lineno"> 478</span> <span class="comment">// (pool.out - assetOut)</span></div>
<div class="line"><a id="l00479" name="l00479"></a><span class="lineno"> 479</span> <span class="comment">// minimize:</span></div>
<div class="line"><a id="l00480" name="l00480"></a><span class="lineno"> 480</span> <span class="comment">// (1-tfee/100000)</span></div>
<div class="line"><a id="l00481" name="l00481"></a><span class="lineno"> 481</span> <span class="comment">// maximize:</span></div>
<div class="line"><a id="l00482" name="l00482"></a><span class="lineno"> 482</span> <span class="comment">// tfee/100000</span></div>
<div class="line"><a id="l00483" name="l00483"></a><span class="lineno"> 483</span> </div>
<div class="line"><a id="l00484" name="l00484"></a><span class="lineno"> 484</span> <a class="code hl_class" href="classxrpl_1_1saveNumberRoundMode.html">saveNumberRoundMode</a> _{<a class="code hl_function" href="classxrpl_1_1Number.html#a0c71d26d6de400ed12cf3923157aca31">Number::getround</a>()};</div>
<div class="line"><a id="l00485" name="l00485"></a><span class="lineno"> 485</span> </div>
<div class="line"><a id="l00486" name="l00486"></a><span class="lineno"> 486</span> <a class="code hl_function" href="classxrpl_1_1Number.html#a274b459d7478df80795caed8a56d4f00">Number::setround</a>(<a class="code hl_enumvalue" href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95aaf71effcd4dcf7bc7c89bb51e27e8b17">Number::upward</a>);</div>
<div class="line"><a id="l00487" name="l00487"></a><span class="lineno"> 487</span> <span class="keyword">auto</span> <span class="keyword">const</span> numerator = pool.in * pool.out;</div>
<div class="line"><a id="l00488" name="l00488"></a><span class="lineno"> 488</span> </div>
<div class="line"><a id="l00489" name="l00489"></a><span class="lineno"> 489</span> <a class="code hl_function" href="classxrpl_1_1Number.html#a274b459d7478df80795caed8a56d4f00">Number::setround</a>(<a class="code hl_enumvalue" href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95aefac6c5bd63a85dcee4fc69baf788d40">Number::downward</a>);</div>
<div class="line"><a id="l00490" name="l00490"></a><span class="lineno"> 490</span> <span class="keyword">auto</span> <span class="keyword">const</span> denom = pool.out - assetOut;</div>
<div class="line"><a id="l00491" name="l00491"></a><span class="lineno"> 491</span> <span class="keywordflow">if</span> (denom.signum() &lt;= 0)</div>
<div class="line"><a id="l00492" name="l00492"></a><span class="lineno"> 492</span> {</div>
<div class="line"><a id="l00493" name="l00493"></a><span class="lineno"> 493</span> <span class="keywordflow">return</span> toMaxAmount&lt;TIn&gt;(<a class="code hl_function" href="namespacexrpl.html#afa772eaaed7a3a30339e41dddb0d3d3a">getIssue</a>(pool.in));</div>
<div class="line"><a id="l00494" name="l00494"></a><span class="lineno"> 494</span> }</div>
<div class="line"><a id="l00495" name="l00495"></a><span class="lineno"> 495</span> </div>
<div class="line"><a id="l00496" name="l00496"></a><span class="lineno"> 496</span> <a class="code hl_function" href="classxrpl_1_1Number.html#a274b459d7478df80795caed8a56d4f00">Number::setround</a>(<a class="code hl_enumvalue" href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95aaf71effcd4dcf7bc7c89bb51e27e8b17">Number::upward</a>);</div>
<div class="line"><a id="l00497" name="l00497"></a><span class="lineno"> 497</span> <span class="keyword">auto</span> <span class="keyword">const</span> ratio = numerator / denom;</div>
<div class="line"><a id="l00498" name="l00498"></a><span class="lineno"> 498</span> <span class="keyword">auto</span> <span class="keyword">const</span> numerator2 = ratio - pool.in;</div>
<div class="line"><a id="l00499" name="l00499"></a><span class="lineno"> 499</span> <span class="keyword">auto</span> <span class="keyword">const</span> fee = <a class="code hl_function" href="namespacexrpl.html#acc61573879eaa546a305cad60f2de28b">getFee</a>(tfee);</div>
<div class="line"><a id="l00500" name="l00500"></a><span class="lineno"> 500</span> </div>
<div class="line"><a id="l00501" name="l00501"></a><span class="lineno"> 501</span> <a class="code hl_function" href="classxrpl_1_1Number.html#a274b459d7478df80795caed8a56d4f00">Number::setround</a>(<a class="code hl_enumvalue" href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95aefac6c5bd63a85dcee4fc69baf788d40">Number::downward</a>);</div>
<div class="line"><a id="l00502" name="l00502"></a><span class="lineno"> 502</span> <span class="keyword">auto</span> <span class="keyword">const</span> <a class="code hl_function" href="namespacexrpl.html#aa0a361beb4e49cb6a4653ec984d997dc">feeMult</a> = 1 - fee;</div>
<div class="line"><a id="l00503" name="l00503"></a><span class="lineno"> 503</span> </div>
<div class="line"><a id="l00504" name="l00504"></a><span class="lineno"> 504</span> <a class="code hl_function" href="classxrpl_1_1Number.html#a274b459d7478df80795caed8a56d4f00">Number::setround</a>(<a class="code hl_enumvalue" href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95aaf71effcd4dcf7bc7c89bb51e27e8b17">Number::upward</a>);</div>
<div class="line"><a id="l00505" name="l00505"></a><span class="lineno"> 505</span> <span class="keyword">auto</span> <span class="keyword">const</span> swapIn = numerator2 / <a class="code hl_function" href="namespacexrpl.html#aa0a361beb4e49cb6a4653ec984d997dc">feeMult</a>;</div>
<div class="line"><a id="l00506" name="l00506"></a><span class="lineno"> 506</span> <span class="keywordflow">if</span> (swapIn.signum() &lt; 0)</div>
<div class="line"><a id="l00507" name="l00507"></a><span class="lineno"> 507</span> <span class="keywordflow">return</span> toAmount&lt;TIn&gt;(<a class="code hl_function" href="namespacexrpl.html#afa772eaaed7a3a30339e41dddb0d3d3a">getIssue</a>(pool.in), 0);</div>
<div class="line"><a id="l00508" name="l00508"></a><span class="lineno"> 508</span> </div>
<div class="line"><a id="l00509" name="l00509"></a><span class="lineno"> 509</span> <span class="keywordflow">return</span> toAmount&lt;TIn&gt;(<a class="code hl_function" href="namespacexrpl.html#afa772eaaed7a3a30339e41dddb0d3d3a">getIssue</a>(pool.in), swapIn, <a class="code hl_enumvalue" href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95aaf71effcd4dcf7bc7c89bb51e27e8b17">Number::upward</a>);</div>
<div class="line"><a id="l00510" name="l00510"></a><span class="lineno"> 510</span> }</div>
<div class="line"><a id="l00511" name="l00511"></a><span class="lineno"> 511</span> <span class="keywordflow">else</span></div>
<div class="line"><a id="l00512" name="l00512"></a><span class="lineno"> 512</span> {</div>
<div class="line"><a id="l00513" name="l00513"></a><span class="lineno"> 513</span> <span class="keywordflow">return</span> toAmount&lt;TIn&gt;(</div>
<div class="line"><a id="l00514" name="l00514"></a><span class="lineno"> 514</span> <a class="code hl_function" href="namespacexrpl.html#afa772eaaed7a3a30339e41dddb0d3d3a">getIssue</a>(pool.in),</div>
<div class="line"><a id="l00515" name="l00515"></a><span class="lineno"> 515</span> ((pool.in * pool.out) / (pool.out - assetOut) - pool.in) / <a class="code hl_function" href="namespacexrpl.html#aa0a361beb4e49cb6a4653ec984d997dc">feeMult</a>(tfee),</div>
<div class="line"><a id="l00516" name="l00516"></a><span class="lineno"> 516</span> <a class="code hl_enumvalue" href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95aaf71effcd4dcf7bc7c89bb51e27e8b17">Number::upward</a>);</div>
<div class="line"><a id="l00517" name="l00517"></a><span class="lineno"> 517</span> }</div>
<div class="line"><a id="l00518" name="l00518"></a><span class="lineno"> 518</span>}</div>
</div>
<div class="line"><a id="l00519" name="l00519"></a><span class="lineno"> 519</span> </div>
<div class="line"><a id="l00522" name="l00522"></a><span class="lineno"> 522</span>Number</div>
<div class="line"><a id="l00523" name="l00523"></a><span class="lineno"> 523</span><a class="code hl_function" href="namespacexrpl.html#af445c7434a225c64374da975ec967c86">square</a>(Number <span class="keyword">const</span>&amp; n);</div>
<div class="line"><a id="l00524" name="l00524"></a><span class="lineno"> 524</span> </div>
<div class="line"><a id="l00536" name="l00536"></a><span class="lineno"> 536</span>STAmount</div>
<div class="line"><a id="l00537" name="l00537"></a><span class="lineno"> 537</span><a class="code hl_function" href="namespacexrpl.html#a5503668e9fd3f6db11f500552c3584f1">adjustLPTokens</a>(STAmount <span class="keyword">const</span>&amp; lptAMMBalance, STAmount <span class="keyword">const</span>&amp; lpTokens, <a class="code hl_enumeration" href="namespacexrpl.html#a36f952e305630142ea1bb1946a6dd383">IsDeposit</a> isDeposit);</div>
<div class="line"><a id="l00538" name="l00538"></a><span class="lineno"> 538</span> </div>
<div class="line"><a id="l00550" name="l00550"></a><span class="lineno"> 550</span><a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/utility/tuple.html">std::tuple&lt;STAmount, std::optional&lt;STAmount&gt;</a>, STAmount&gt;</div>
<div class="line"><a id="l00551" name="l00551"></a><span class="lineno"> 551</span><a class="code hl_function" href="namespacexrpl.html#ac53efcd7320c16cbf784266098ebf0e7">adjustAmountsByLPTokens</a>(</div>
<div class="line"><a id="l00552" name="l00552"></a><span class="lineno"> 552</span> STAmount <span class="keyword">const</span>&amp; amountBalance,</div>
<div class="line"><a id="l00553" name="l00553"></a><span class="lineno"> 553</span> STAmount <span class="keyword">const</span>&amp; amount,</div>
<div class="line"><a id="l00554" name="l00554"></a><span class="lineno"> 554</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/utility/optional.html">std::optional&lt;STAmount&gt;</a> <span class="keyword">const</span>&amp; amount2,</div>
<div class="line"><a id="l00555" name="l00555"></a><span class="lineno"> 555</span> STAmount <span class="keyword">const</span>&amp; lptAMMBalance,</div>
<div class="line"><a id="l00556" name="l00556"></a><span class="lineno"> 556</span> STAmount <span class="keyword">const</span>&amp; lpTokens,</div>
<div class="line"><a id="l00557" name="l00557"></a><span class="lineno"> 557</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint16_t</a> tfee,</div>
<div class="line"><a id="l00558" name="l00558"></a><span class="lineno"> 558</span> <a class="code hl_enumeration" href="namespacexrpl.html#a36f952e305630142ea1bb1946a6dd383">IsDeposit</a> isDeposit);</div>
<div class="line"><a id="l00559" name="l00559"></a><span class="lineno"> 559</span> </div>
<div class="line"><a id="l00563" name="l00563"></a><span class="lineno"> 563</span>Number</div>
<div class="line"><a id="l00564" name="l00564"></a><span class="lineno"> 564</span><a class="code hl_function" href="namespacexrpl.html#a5d80dac62a2cef71e12b8e69ccc03651">solveQuadraticEq</a>(Number <span class="keyword">const</span>&amp; a, Number <span class="keyword">const</span>&amp; b, Number <span class="keyword">const</span>&amp; c);</div>
<div class="line"><a id="l00565" name="l00565"></a><span class="lineno"> 565</span> </div>
<div class="line"><a id="l00566" name="l00566"></a><span class="lineno"> 566</span>STAmount</div>
<div class="line"><a id="l00567" name="l00567"></a><span class="lineno"> 567</span><a class="code hl_function" href="namespacexrpl.html#a63a3223bbf81dbd09717eb04d45d58cf">multiply</a>(STAmount <span class="keyword">const</span>&amp; amount, Number <span class="keyword">const</span>&amp; frac, <a class="code hl_enumeration" href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95">Number::rounding_mode</a> rm);</div>
<div class="line"><a id="l00568" name="l00568"></a><span class="lineno"> 568</span> </div>
<div class="line"><a id="l00569" name="l00569"></a><span class="lineno"> 569</span><span class="keyword">namespace </span>detail {</div>
<div class="line"><a id="l00570" name="l00570"></a><span class="lineno"> 570</span> </div>
<div class="line"><a id="l00571" name="l00571"></a><span class="lineno"> 571</span><span class="keyword">inline</span> <a class="code hl_enumeration" href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95">Number::rounding_mode</a></div>
<div class="foldopen" id="foldopen00572" data-start="{" data-end="}">
<div class="line"><a id="l00572" name="l00572"></a><span class="lineno"><a class="line" href="namespacexrpl_1_1detail.html#a8a7d505d49059bfda5a0abe8e45d7a3c"> 572</a></span><a class="code hl_function" href="namespacexrpl_1_1detail.html#a8a7d505d49059bfda5a0abe8e45d7a3c">getLPTokenRounding</a>(<a class="code hl_enumeration" href="namespacexrpl.html#a36f952e305630142ea1bb1946a6dd383">IsDeposit</a> isDeposit)</div>
<div class="line"><a id="l00573" name="l00573"></a><span class="lineno"> 573</span>{</div>
<div class="line"><a id="l00574" name="l00574"></a><span class="lineno"> 574</span> <span class="comment">// Minimize on deposit, maximize on withdraw to ensure</span></div>
<div class="line"><a id="l00575" name="l00575"></a><span class="lineno"> 575</span> <span class="comment">// AMM invariant sqrt(poolAsset1 * poolAsset2) &gt;= LPTokensBalance</span></div>
<div class="line"><a id="l00576" name="l00576"></a><span class="lineno"> 576</span> <span class="keywordflow">return</span> isDeposit == <a class="code hl_enumvalue" href="namespacexrpl.html#a36f952e305630142ea1bb1946a6dd383a93cba07454f06a4a960172bbd6e2a435">IsDeposit::Yes</a> ? <a class="code hl_enumvalue" href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95aefac6c5bd63a85dcee4fc69baf788d40">Number::downward</a> : <a class="code hl_enumvalue" href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95aaf71effcd4dcf7bc7c89bb51e27e8b17">Number::upward</a>;</div>
<div class="line"><a id="l00577" name="l00577"></a><span class="lineno"> 577</span>}</div>
</div>
<div class="line"><a id="l00578" name="l00578"></a><span class="lineno"> 578</span> </div>
<div class="line"><a id="l00579" name="l00579"></a><span class="lineno"> 579</span><span class="keyword">inline</span> <a class="code hl_enumeration" href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95">Number::rounding_mode</a></div>
<div class="foldopen" id="foldopen00580" data-start="{" data-end="}">
<div class="line"><a id="l00580" name="l00580"></a><span class="lineno"><a class="line" href="namespacexrpl_1_1detail.html#abf56f4d1d1f7a6f319713befdd38c507"> 580</a></span><a class="code hl_function" href="namespacexrpl_1_1detail.html#abf56f4d1d1f7a6f319713befdd38c507">getAssetRounding</a>(<a class="code hl_enumeration" href="namespacexrpl.html#a36f952e305630142ea1bb1946a6dd383">IsDeposit</a> isDeposit)</div>
<div class="line"><a id="l00581" name="l00581"></a><span class="lineno"> 581</span>{</div>
<div class="line"><a id="l00582" name="l00582"></a><span class="lineno"> 582</span> <span class="comment">// Maximize on deposit, minimize on withdraw to ensure</span></div>
<div class="line"><a id="l00583" name="l00583"></a><span class="lineno"> 583</span> <span class="comment">// AMM invariant sqrt(poolAsset1 * poolAsset2) &gt;= LPTokensBalance</span></div>
<div class="line"><a id="l00584" name="l00584"></a><span class="lineno"> 584</span> <span class="keywordflow">return</span> isDeposit == <a class="code hl_enumvalue" href="namespacexrpl.html#a36f952e305630142ea1bb1946a6dd383a93cba07454f06a4a960172bbd6e2a435">IsDeposit::Yes</a> ? <a class="code hl_enumvalue" href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95aaf71effcd4dcf7bc7c89bb51e27e8b17">Number::upward</a> : <a class="code hl_enumvalue" href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95aefac6c5bd63a85dcee4fc69baf788d40">Number::downward</a>;</div>
<div class="line"><a id="l00585" name="l00585"></a><span class="lineno"> 585</span>}</div>
</div>
<div class="line"><a id="l00586" name="l00586"></a><span class="lineno"> 586</span> </div>
<div class="line"><a id="l00587" name="l00587"></a><span class="lineno"> 587</span>} <span class="comment">// namespace detail</span></div>
<div class="line"><a id="l00588" name="l00588"></a><span class="lineno"> 588</span> </div>
<div class="line"><a id="l00594" name="l00594"></a><span class="lineno"> 594</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> A&gt;</div>
<div class="line"><a id="l00595" name="l00595"></a><span class="lineno"> 595</span>STAmount</div>
<div class="foldopen" id="foldopen00596" data-start="{" data-end="}">
<div class="line"><a id="l00596" name="l00596"></a><span class="lineno"><a class="line" href="namespacexrpl.html#a9642f0a8b029845edff291f4e3fe2166"> 596</a></span><a class="code hl_function" href="namespacexrpl.html#a9642f0a8b029845edff291f4e3fe2166">getRoundedAsset</a>(<a class="code hl_class" href="classxrpl_1_1Rules.html">Rules</a> <span class="keyword">const</span>&amp; rules, <a class="code hl_class" href="classxrpl_1_1STAmount.html">STAmount</a> <span class="keyword">const</span>&amp; balance, A <span class="keyword">const</span>&amp; frac, <a class="code hl_enumeration" href="namespacexrpl.html#a36f952e305630142ea1bb1946a6dd383">IsDeposit</a> isDeposit)</div>
<div class="line"><a id="l00597" name="l00597"></a><span class="lineno"> 597</span>{</div>
<div class="line"><a id="l00598" name="l00598"></a><span class="lineno"> 598</span> <span class="keywordflow">if</span> (!rules.<a class="code hl_function" href="classxrpl_1_1Rules.html#a125114e27f806d1517096cbee50a2b04">enabled</a>(fixAMMv1_3))</div>
<div class="line"><a id="l00599" name="l00599"></a><span class="lineno"> 599</span> {</div>
<div class="line"><a id="l00600" name="l00600"></a><span class="lineno"> 600</span> <span class="keywordflow">if</span> <span class="keyword">constexpr</span> (<a class="code hl_variableRef" href="http://en.cppreference.com/w/cpp/types/is_same.html">std::is_same_v&lt;A, STAmount&gt;</a>)</div>
<div class="line"><a id="l00601" name="l00601"></a><span class="lineno"> 601</span> <span class="keywordflow">return</span> <a class="code hl_function" href="namespacexrpl.html#a63a3223bbf81dbd09717eb04d45d58cf">multiply</a>(balance, frac, balance.<a class="code hl_function" href="classxrpl_1_1STAmount.html#a21f103c714a972c2e3682c5f89360771">issue</a>());</div>
<div class="line"><a id="l00602" name="l00602"></a><span class="lineno"> 602</span> <span class="keywordflow">else</span></div>
<div class="line"><a id="l00603" name="l00603"></a><span class="lineno"> 603</span> <span class="keywordflow">return</span> <a class="code hl_function" href="namespacexrpl.html#a40e86ef937741d6bead51310df36a89e">toSTAmount</a>(balance.<a class="code hl_function" href="classxrpl_1_1STAmount.html#a21f103c714a972c2e3682c5f89360771">issue</a>(), balance * frac);</div>
<div class="line"><a id="l00604" name="l00604"></a><span class="lineno"> 604</span> }</div>
<div class="line"><a id="l00605" name="l00605"></a><span class="lineno"> 605</span> <span class="keyword">auto</span> <span class="keyword">const</span> rm = <a class="code hl_function" href="namespacexrpl_1_1detail.html#abf56f4d1d1f7a6f319713befdd38c507">detail::getAssetRounding</a>(isDeposit);</div>
<div class="line"><a id="l00606" name="l00606"></a><span class="lineno"> 606</span> <span class="keywordflow">return</span> <a class="code hl_function" href="namespacexrpl.html#a63a3223bbf81dbd09717eb04d45d58cf">multiply</a>(balance, frac, rm);</div>
<div class="line"><a id="l00607" name="l00607"></a><span class="lineno"> 607</span>}</div>
</div>
<div class="line"><a id="l00608" name="l00608"></a><span class="lineno"> 608</span> </div>
<div class="line"><a id="l00618" name="l00618"></a><span class="lineno"> 618</span>STAmount</div>
<div class="line"><a id="l00619" name="l00619"></a><span class="lineno"> 619</span><a class="code hl_function" href="namespacexrpl.html#a9642f0a8b029845edff291f4e3fe2166">getRoundedAsset</a>(</div>
<div class="line"><a id="l00620" name="l00620"></a><span class="lineno"> 620</span> Rules <span class="keyword">const</span>&amp; rules,</div>
<div class="line"><a id="l00621" name="l00621"></a><span class="lineno"> 621</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/utility/functional/function.html">std::function</a>&lt;Number()&gt;&amp;&amp; noRoundCb,</div>
<div class="line"><a id="l00622" name="l00622"></a><span class="lineno"> 622</span> STAmount <span class="keyword">const</span>&amp; balance,</div>
<div class="line"><a id="l00623" name="l00623"></a><span class="lineno"> 623</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/utility/functional/function.html">std::function</a>&lt;Number()&gt;&amp;&amp; productCb,</div>
<div class="line"><a id="l00624" name="l00624"></a><span class="lineno"> 624</span> <a class="code hl_enumeration" href="namespacexrpl.html#a36f952e305630142ea1bb1946a6dd383">IsDeposit</a> isDeposit);</div>
<div class="line"><a id="l00625" name="l00625"></a><span class="lineno"> 625</span> </div>
<div class="line"><a id="l00633" name="l00633"></a><span class="lineno"> 633</span>STAmount</div>
<div class="line"><a id="l00634" name="l00634"></a><span class="lineno"> 634</span><a class="code hl_function" href="namespacexrpl.html#a6a17323fffb98318d59259cc12c75127">getRoundedLPTokens</a>(Rules <span class="keyword">const</span>&amp; rules, STAmount <span class="keyword">const</span>&amp; balance, Number <span class="keyword">const</span>&amp; frac, <a class="code hl_enumeration" href="namespacexrpl.html#a36f952e305630142ea1bb1946a6dd383">IsDeposit</a> isDeposit);</div>
<div class="line"><a id="l00635" name="l00635"></a><span class="lineno"> 635</span> </div>
<div class="line"><a id="l00647" name="l00647"></a><span class="lineno"> 647</span>STAmount</div>
<div class="line"><a id="l00648" name="l00648"></a><span class="lineno"> 648</span><a class="code hl_function" href="namespacexrpl.html#a6a17323fffb98318d59259cc12c75127">getRoundedLPTokens</a>(</div>
<div class="line"><a id="l00649" name="l00649"></a><span class="lineno"> 649</span> Rules <span class="keyword">const</span>&amp; rules,</div>
<div class="line"><a id="l00650" name="l00650"></a><span class="lineno"> 650</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/utility/functional/function.html">std::function</a>&lt;Number()&gt;&amp;&amp; noRoundCb,</div>
<div class="line"><a id="l00651" name="l00651"></a><span class="lineno"> 651</span> STAmount <span class="keyword">const</span>&amp; lptAMMBalance,</div>
<div class="line"><a id="l00652" name="l00652"></a><span class="lineno"> 652</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/utility/functional/function.html">std::function</a>&lt;Number()&gt;&amp;&amp; productCb,</div>
<div class="line"><a id="l00653" name="l00653"></a><span class="lineno"> 653</span> <a class="code hl_enumeration" href="namespacexrpl.html#a36f952e305630142ea1bb1946a6dd383">IsDeposit</a> isDeposit);</div>
<div class="line"><a id="l00654" name="l00654"></a><span class="lineno"> 654</span> </div>
<div class="line"><a id="l00655" name="l00655"></a><span class="lineno"> 655</span><span class="comment">/* Next two functions adjust asset in/out amount to factor in the adjusted</span></div>
<div class="line"><a id="l00656" name="l00656"></a><span class="lineno"> 656</span><span class="comment"> * lptokens. The lptokens are calculated from the asset in/out. The lptokens are</span></div>
<div class="line"><a id="l00657" name="l00657"></a><span class="lineno"> 657</span><span class="comment"> * then adjusted to factor in the loss in precision. The adjusted lptokens might</span></div>
<div class="line"><a id="l00658" name="l00658"></a><span class="lineno"> 658</span><span class="comment"> * be less than the initially calculated tokens. Therefore, the asset in/out</span></div>
<div class="line"><a id="l00659" name="l00659"></a><span class="lineno"> 659</span><span class="comment"> * must be adjusted. The rounding might result in the adjusted amount being</span></div>
<div class="line"><a id="l00660" name="l00660"></a><span class="lineno"> 660</span><span class="comment"> * greater than the original asset in/out amount. If this happens,</span></div>
<div class="line"><a id="l00661" name="l00661"></a><span class="lineno"> 661</span><span class="comment"> * then the original amount is reduced by the difference in the adjusted amount</span></div>
<div class="line"><a id="l00662" name="l00662"></a><span class="lineno"> 662</span><span class="comment"> * and the original amount. The actual tokens and the actual adjusted amount</span></div>
<div class="line"><a id="l00663" name="l00663"></a><span class="lineno"> 663</span><span class="comment"> * are then recalculated. The minimum of the original and the actual</span></div>
<div class="line"><a id="l00664" name="l00664"></a><span class="lineno"> 664</span><span class="comment"> * adjusted amount is returned.</span></div>
<div class="line"><a id="l00665" name="l00665"></a><span class="lineno"> 665</span><span class="comment"> */</span></div>
<div class="line"><a id="l00666" name="l00666"></a><span class="lineno"> 666</span><a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/utility/pair.html">std::pair&lt;STAmount, STAmount&gt;</a></div>
<div class="line"><a id="l00667" name="l00667"></a><span class="lineno"> 667</span><a class="code hl_function" href="namespacexrpl.html#a7e0d13a8c7cf385e1ca9512163a0bf8a">adjustAssetInByTokens</a>(</div>
<div class="line"><a id="l00668" name="l00668"></a><span class="lineno"> 668</span> Rules <span class="keyword">const</span>&amp; rules,</div>
<div class="line"><a id="l00669" name="l00669"></a><span class="lineno"> 669</span> STAmount <span class="keyword">const</span>&amp; balance,</div>
<div class="line"><a id="l00670" name="l00670"></a><span class="lineno"> 670</span> STAmount <span class="keyword">const</span>&amp; amount,</div>
<div class="line"><a id="l00671" name="l00671"></a><span class="lineno"> 671</span> STAmount <span class="keyword">const</span>&amp; lptAMMBalance,</div>
<div class="line"><a id="l00672" name="l00672"></a><span class="lineno"> 672</span> STAmount <span class="keyword">const</span>&amp; tokens,</div>
<div class="line"><a id="l00673" name="l00673"></a><span class="lineno"> 673</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint16_t</a> tfee);</div>
<div class="line"><a id="l00674" name="l00674"></a><span class="lineno"> 674</span><a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/utility/pair.html">std::pair&lt;STAmount, STAmount&gt;</a></div>
<div class="line"><a id="l00675" name="l00675"></a><span class="lineno"> 675</span><a class="code hl_function" href="namespacexrpl.html#a897488203b50a0d19c8798a1ab65c65c">adjustAssetOutByTokens</a>(</div>
<div class="line"><a id="l00676" name="l00676"></a><span class="lineno"> 676</span> Rules <span class="keyword">const</span>&amp; rules,</div>
<div class="line"><a id="l00677" name="l00677"></a><span class="lineno"> 677</span> STAmount <span class="keyword">const</span>&amp; balance,</div>
<div class="line"><a id="l00678" name="l00678"></a><span class="lineno"> 678</span> STAmount <span class="keyword">const</span>&amp; amount,</div>
<div class="line"><a id="l00679" name="l00679"></a><span class="lineno"> 679</span> STAmount <span class="keyword">const</span>&amp; lptAMMBalance,</div>
<div class="line"><a id="l00680" name="l00680"></a><span class="lineno"> 680</span> STAmount <span class="keyword">const</span>&amp; tokens,</div>
<div class="line"><a id="l00681" name="l00681"></a><span class="lineno"> 681</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint16_t</a> tfee);</div>
<div class="line"><a id="l00682" name="l00682"></a><span class="lineno"> 682</span> </div>
<div class="line"><a id="l00686" name="l00686"></a><span class="lineno"> 686</span>Number</div>
<div class="line"><a id="l00687" name="l00687"></a><span class="lineno"> 687</span><a class="code hl_function" href="namespacexrpl.html#a293c232307774d009171955169f6b25f">adjustFracByTokens</a>(Rules <span class="keyword">const</span>&amp; rules, STAmount <span class="keyword">const</span>&amp; lptAMMBalance, STAmount <span class="keyword">const</span>&amp; tokens, Number <span class="keyword">const</span>&amp; frac);</div>
<div class="line"><a id="l00688" name="l00688"></a><span class="lineno"> 688</span> </div>
<div class="line"><a id="l00689" name="l00689"></a><span class="lineno"> 689</span>} <span class="comment">// namespace xrpl</span></div>
<div class="ttc" id="aclassbeast_1_1Journal_html"><div class="ttname"><a href="classbeast_1_1Journal.html">beast::Journal</a></div><div class="ttdoc">A generic endpoint for log messages.</div><div class="ttdef"><b>Definition</b> <a href="Journal_8h_source.html#l00039">Journal.h:40</a></div></div>
<div class="ttc" id="aclassbeast_1_1Journal_html_a49b0713e65bb8e2c51b76fbf16252afe"><div class="ttname"><a href="classbeast_1_1Journal.html#a49b0713e65bb8e2c51b76fbf16252afe">beast::Journal::error</a></div><div class="ttdeci">Stream error() const</div><div class="ttdef"><b>Definition</b> <a href="Journal_8h_source.html#l00318">Journal.h:318</a></div></div>
<div class="ttc" id="aclassbeast_1_1Journal_html_abbe082bd27ca0f1d1365af2824e4f85b"><div class="ttname"><a href="classbeast_1_1Journal.html#abbe082bd27ca0f1d1365af2824e4f85b">beast::Journal::trace</a></div><div class="ttdeci">Stream trace() const</div><div class="ttdoc">Severity stream access functions.</div><div class="ttdef"><b>Definition</b> <a href="Journal_8h_source.html#l00294">Journal.h:294</a></div></div>
<div class="ttc" id="aclassxrpl_1_1NumberRoundModeGuard_html"><div class="ttname"><a href="classxrpl_1_1NumberRoundModeGuard.html">xrpl::NumberRoundModeGuard</a></div><div class="ttdef"><b>Definition</b> <a href="Number_8h_source.html#l00779">Number.h:780</a></div></div>
<div class="ttc" id="aclassxrpl_1_1Number_html"><div class="ttname"><a href="classxrpl_1_1Number.html">xrpl::Number</a></div><div class="ttdoc">Number is a floating point type that can represent a wide range of values.</div><div class="ttdef"><b>Definition</b> <a href="Number_8h_source.html#l00206">Number.h:207</a></div></div>
<div class="ttc" id="aclassxrpl_1_1Number_html_a0c71d26d6de400ed12cf3923157aca31"><div class="ttname"><a href="classxrpl_1_1Number.html#a0c71d26d6de400ed12cf3923157aca31">xrpl::Number::getround</a></div><div class="ttdeci">static rounding_mode getround()</div><div class="ttdef"><b>Definition</b> <a href="Number_8cpp_source.html#l00033">Number.cpp:33</a></div></div>
<div class="ttc" id="aclassxrpl_1_1Number_html_a274b459d7478df80795caed8a56d4f00"><div class="ttname"><a href="classxrpl_1_1Number.html#a274b459d7478df80795caed8a56d4f00">xrpl::Number::setround</a></div><div class="ttdeci">static rounding_mode setround(rounding_mode mode)</div><div class="ttdef"><b>Definition</b> <a href="Number_8cpp_source.html#l00039">Number.cpp:39</a></div></div>
<div class="ttc" id="aclassxrpl_1_1Number_html_a40e08f75077897215c66d102b5b75f95"><div class="ttname"><a href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95">xrpl::Number::rounding_mode</a></div><div class="ttdeci">rounding_mode</div><div class="ttdef"><b>Definition</b> <a href="Number_8h_source.html#l00380">Number.h:380</a></div></div>
<div class="ttc" id="aclassxrpl_1_1Number_html_a40e08f75077897215c66d102b5b75f95aa0120ec63f8c549bc0bf1c945e36e779"><div class="ttname"><a href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95aa0120ec63f8c549bc0bf1c945e36e779">xrpl::Number::towards_zero</a></div><div class="ttdeci">@ towards_zero</div><div class="ttdef"><b>Definition</b> <a href="Number_8h_source.html#l00380">Number.h:380</a></div></div>
<div class="ttc" id="aclassxrpl_1_1Number_html_a40e08f75077897215c66d102b5b75f95aa1683b7e2939668142366896b111931a"><div class="ttname"><a href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95aa1683b7e2939668142366896b111931a">xrpl::Number::to_nearest</a></div><div class="ttdeci">@ to_nearest</div><div class="ttdef"><b>Definition</b> <a href="Number_8h_source.html#l00380">Number.h:380</a></div></div>
<div class="ttc" id="aclassxrpl_1_1Number_html_a40e08f75077897215c66d102b5b75f95aaf71effcd4dcf7bc7c89bb51e27e8b17"><div class="ttname"><a href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95aaf71effcd4dcf7bc7c89bb51e27e8b17">xrpl::Number::upward</a></div><div class="ttdeci">@ upward</div><div class="ttdef"><b>Definition</b> <a href="Number_8h_source.html#l00380">Number.h:380</a></div></div>
<div class="ttc" id="aclassxrpl_1_1Number_html_a40e08f75077897215c66d102b5b75f95aefac6c5bd63a85dcee4fc69baf788d40"><div class="ttname"><a href="classxrpl_1_1Number.html#a40e08f75077897215c66d102b5b75f95aefac6c5bd63a85dcee4fc69baf788d40">xrpl::Number::downward</a></div><div class="ttdeci">@ downward</div><div class="ttdef"><b>Definition</b> <a href="Number_8h_source.html#l00380">Number.h:380</a></div></div>
<div class="ttc" id="aclassxrpl_1_1Rules_html"><div class="ttname"><a href="classxrpl_1_1Rules.html">xrpl::Rules</a></div><div class="ttdoc">Rules controlling protocol behavior.</div><div class="ttdef"><b>Definition</b> <a href="Rules_8h_source.html#l00017">Rules.h:18</a></div></div>
<div class="ttc" id="aclassxrpl_1_1Rules_html_a125114e27f806d1517096cbee50a2b04"><div class="ttname"><a href="classxrpl_1_1Rules.html#a125114e27f806d1517096cbee50a2b04">xrpl::Rules::enabled</a></div><div class="ttdeci">bool enabled(uint256 const &amp;feature) const</div><div class="ttdoc">Returns true if a feature is enabled.</div><div class="ttdef"><b>Definition</b> <a href="Rules_8cpp_source.html#l00118">Rules.cpp:118</a></div></div>
<div class="ttc" id="aclassxrpl_1_1STAmount_html"><div class="ttname"><a href="classxrpl_1_1STAmount.html">xrpl::STAmount</a></div><div class="ttdef"><b>Definition</b> <a href="STAmount_8h_source.html#l00029">STAmount.h:30</a></div></div>
<div class="ttc" id="aclassxrpl_1_1STAmount_html_a21f103c714a972c2e3682c5f89360771"><div class="ttname"><a href="classxrpl_1_1STAmount.html#a21f103c714a972c2e3682c5f89360771">xrpl::STAmount::issue</a></div><div class="ttdeci">Issue const &amp; issue() const</div><div class="ttdef"><b>Definition</b> <a href="STAmount_8h_source.html#l00454">STAmount.h:454</a></div></div>
<div class="ttc" id="aclassxrpl_1_1saveNumberRoundMode_html"><div class="ttname"><a href="classxrpl_1_1saveNumberRoundMode.html">xrpl::saveNumberRoundMode</a></div><div class="ttdef"><b>Definition</b> <a href="Number_8h_source.html#l00758">Number.h:759</a></div></div>
<div class="ttc" id="aendl_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a></div><div class="ttdeci">T endl(T... args)</div></div>
<div class="ttc" id="afunction_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/utility/functional/function.html">std::function</a></div></div>
<div class="ttc" id="ainteger_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint16_t</a></div></div>
<div class="ttc" id="ais_same_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/types/is_same.html">std::is_same_v</a></div><div class="ttdeci">T is_same_v</div></div>
<div class="ttc" id="aminmax_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/algorithm/minmax.html">std::minmax</a></div><div class="ttdeci">T minmax(T... args)</div></div>
<div class="ttc" id="anamespacexrpl_1_1detail_html_a21d650c348c672943bc1f72867a05f79"><div class="ttname"><a href="namespacexrpl_1_1detail.html#a21d650c348c672943bc1f72867a05f79">xrpl::detail::reduceOffer</a></div><div class="ttdeci">Number reduceOffer(auto const &amp;amount)</div><div class="ttdef"><b>Definition</b> <a href="AMMHelpers_8h_source.html#l00020">AMMHelpers.h:20</a></div></div>
<div class="ttc" id="anamespacexrpl_1_1detail_html_a8a7d505d49059bfda5a0abe8e45d7a3c"><div class="ttname"><a href="namespacexrpl_1_1detail.html#a8a7d505d49059bfda5a0abe8e45d7a3c">xrpl::detail::getLPTokenRounding</a></div><div class="ttdeci">Number::rounding_mode getLPTokenRounding(IsDeposit isDeposit)</div><div class="ttdef"><b>Definition</b> <a href="AMMHelpers_8h_source.html#l00572">AMMHelpers.h:572</a></div></div>
<div class="ttc" id="anamespacexrpl_1_1detail_html_abf56f4d1d1f7a6f319713befdd38c507"><div class="ttname"><a href="namespacexrpl_1_1detail.html#abf56f4d1d1f7a6f319713befdd38c507">xrpl::detail::getAssetRounding</a></div><div class="ttdeci">Number::rounding_mode getAssetRounding(IsDeposit isDeposit)</div><div class="ttdef"><b>Definition</b> <a href="AMMHelpers_8h_source.html#l00580">AMMHelpers.h:580</a></div></div>
<div class="ttc" id="anamespacexrpl_html"><div class="ttname"><a href="namespacexrpl.html">xrpl</a></div><div class="ttdoc">Use hash_* containers for keys that do not need a cryptographically secure hashing algorithm.</div><div class="ttdef"><b>Definition</b> <a href="algorithm_8h_source.html#l00005">algorithm.h:5</a></div></div>
<div class="ttc" id="anamespacexrpl_html_a255b5518870987aa13c1a924c9900ab9"><div class="ttname"><a href="namespacexrpl.html#a255b5518870987aa13c1a924c9900ab9">xrpl::isXRP</a></div><div class="ttdeci">bool isXRP(AccountID const &amp;c)</div><div class="ttdef"><b>Definition</b> <a href="AccountID_8h_source.html#l00070">AccountID.h:70</a></div></div>
<div class="ttc" id="anamespacexrpl_html_a293c232307774d009171955169f6b25f"><div class="ttname"><a href="namespacexrpl.html#a293c232307774d009171955169f6b25f">xrpl::adjustFracByTokens</a></div><div class="ttdeci">Number adjustFracByTokens(Rules const &amp;rules, STAmount const &amp;lptAMMBalance, STAmount const &amp;tokens, Number const &amp;frac)</div><div class="ttdoc">Find a fraction of tokens after the tokens are adjusted.</div><div class="ttdef"><b>Definition</b> <a href="AMMHelpers_8cpp_source.html#l00351">AMMHelpers.cpp:351</a></div></div>
<div class="ttc" id="anamespacexrpl_html_a35ce7572092b98720a52fa343c6f2fa9"><div class="ttname"><a href="namespacexrpl.html#a35ce7572092b98720a52fa343c6f2fa9">xrpl::to_string</a></div><div class="ttdeci">std::string to_string(base_uint&lt; Bits, Tag &gt; const &amp;a)</div><div class="ttdef"><b>Definition</b> <a href="base__uint_8h_source.html#l00597">base_uint.h:597</a></div></div>
<div class="ttc" id="anamespacexrpl_html_a36f952e305630142ea1bb1946a6dd383"><div class="ttname"><a href="namespacexrpl.html#a36f952e305630142ea1bb1946a6dd383">xrpl::IsDeposit</a></div><div class="ttdeci">IsDeposit</div><div class="ttdef"><b>Definition</b> <a href="AMMHelpers_8h_source.html#l00031">AMMHelpers.h:31</a></div></div>
<div class="ttc" id="anamespacexrpl_html_a36f952e305630142ea1bb1946a6dd383a93cba07454f06a4a960172bbd6e2a435"><div class="ttname"><a href="namespacexrpl.html#a36f952e305630142ea1bb1946a6dd383a93cba07454f06a4a960172bbd6e2a435">xrpl::IsDeposit::Yes</a></div><div class="ttdeci">@ Yes</div></div>
<div class="ttc" id="anamespacexrpl_html_a40e86ef937741d6bead51310df36a89e"><div class="ttname"><a href="namespacexrpl.html#a40e86ef937741d6bead51310df36a89e">xrpl::toSTAmount</a></div><div class="ttdeci">STAmount toSTAmount(IOUAmount const &amp;iou, Issue const &amp;iss)</div><div class="ttdef"><b>Definition</b> <a href="AmountConversions_8h_source.html#l00012">AmountConversions.h:12</a></div></div>
<div class="ttc" id="anamespacexrpl_html_a53be00cb856ef39ec60e33cf9694b5eba93cba07454f06a4a960172bbd6e2a435"><div class="ttname"><a href="namespacexrpl.html#a53be00cb856ef39ec60e33cf9694b5eba93cba07454f06a4a960172bbd6e2a435">xrpl::WaiveTransferFee::Yes</a></div><div class="ttdeci">@ Yes</div></div>
<div class="ttc" id="anamespacexrpl_html_a53be00cb856ef39ec60e33cf9694b5ebabafd7322c6e97d25b6299b5d6fe8920b"><div class="ttname"><a href="namespacexrpl.html#a53be00cb856ef39ec60e33cf9694b5ebabafd7322c6e97d25b6299b5d6fe8920b">xrpl::WaiveTransferFee::No</a></div><div class="ttdeci">@ No</div></div>
<div class="ttc" id="anamespacexrpl_html_a5503668e9fd3f6db11f500552c3584f1"><div class="ttname"><a href="namespacexrpl.html#a5503668e9fd3f6db11f500552c3584f1">xrpl::adjustLPTokens</a></div><div class="ttdeci">STAmount adjustLPTokens(STAmount const &amp;lptAMMBalance, STAmount const &amp;lpTokens, IsDeposit isDeposit)</div><div class="ttdoc">Adjust LP tokens to deposit/withdraw.</div><div class="ttdef"><b>Definition</b> <a href="AMMHelpers_8cpp_source.html#l00141">AMMHelpers.cpp:141</a></div></div>
<div class="ttc" id="anamespacexrpl_html_a5a1298fd71a9010ea3228b2ba8d46efe"><div class="ttname"><a href="namespacexrpl.html#a5a1298fd71a9010ea3228b2ba8d46efe">xrpl::getCurrentTransactionRules</a></div><div class="ttdeci">std::optional&lt; Rules &gt; const &amp; getCurrentTransactionRules()</div><div class="ttdef"><b>Definition</b> <a href="Rules_8cpp_source.html#l00031">Rules.cpp:31</a></div></div>
<div class="ttc" id="anamespacexrpl_html_a5d80dac62a2cef71e12b8e69ccc03651"><div class="ttname"><a href="namespacexrpl.html#a5d80dac62a2cef71e12b8e69ccc03651">xrpl::solveQuadraticEq</a></div><div class="ttdeci">Number solveQuadraticEq(Number const &amp;a, Number const &amp;b, Number const &amp;c)</div><div class="ttdoc">Positive solution for quadratic equation: x = (-b + sqrt(b**2 + 4*a*c))/(2*a)</div><div class="ttdef"><b>Definition</b> <a href="AMMHelpers_8cpp_source.html#l00218">AMMHelpers.cpp:218</a></div></div>
<div class="ttc" id="anamespacexrpl_html_a5f8d3cff236ddbd2cbf77a2ef664f877"><div class="ttname"><a href="namespacexrpl.html#a5f8d3cff236ddbd2cbf77a2ef664f877">xrpl::swapAssetIn</a></div><div class="ttdeci">TOut swapAssetIn(TAmounts&lt; TIn, TOut &gt; const &amp;pool, TIn const &amp;assetIn, std::uint16_t tfee)</div><div class="ttdoc">AMM pool invariant - the product (A * B) after swap in/out has to remain at least the same: (A + in) ...</div><div class="ttdef"><b>Definition</b> <a href="AMMHelpers_8h_source.html#l00395">AMMHelpers.h:395</a></div></div>
<div class="ttc" id="anamespacexrpl_html_a6226af7a6f73b543e77694e5b163673b"><div class="ttname"><a href="namespacexrpl.html#a6226af7a6f73b543e77694e5b163673b">xrpl::ammLPTokens</a></div><div class="ttdeci">STAmount ammLPTokens(STAmount const &amp;asset1, STAmount const &amp;asset2, Issue const &amp;lptIssue)</div><div class="ttdoc">Calculate LP Tokens given AMM pool reserves.</div><div class="ttdef"><b>Definition</b> <a href="AMMHelpers_8cpp_source.html#l00006">AMMHelpers.cpp:6</a></div></div>
<div class="ttc" id="anamespacexrpl_html_a63a3223bbf81dbd09717eb04d45d58cf"><div class="ttname"><a href="namespacexrpl.html#a63a3223bbf81dbd09717eb04d45d58cf">xrpl::multiply</a></div><div class="ttdeci">STAmount multiply(STAmount const &amp;amount, Rate const &amp;rate)</div><div class="ttdef"><b>Definition</b> <a href="Rate2_8cpp_source.html#l00034">Rate2.cpp:34</a></div></div>
<div class="ttc" id="anamespacexrpl_html_a65b880854f3adbafe7196ad6e07cacc0"><div class="ttname"><a href="namespacexrpl.html#a65b880854f3adbafe7196ad6e07cacc0">xrpl::ammAssetOut</a></div><div class="ttdeci">STAmount ammAssetOut(STAmount const &amp;assetBalance, STAmount const &amp;lptAMMBalance, STAmount const &amp;lpTokens, std::uint16_t tfee)</div><div class="ttdoc">Calculate asset withdrawal by tokens.</div><div class="ttdef"><b>Definition</b> <a href="AMMHelpers_8cpp_source.html#l00117">AMMHelpers.cpp:117</a></div></div>
<div class="ttc" id="anamespacexrpl_html_a6a17323fffb98318d59259cc12c75127"><div class="ttname"><a href="namespacexrpl.html#a6a17323fffb98318d59259cc12c75127">xrpl::getRoundedLPTokens</a></div><div class="ttdeci">STAmount getRoundedLPTokens(Rules const &amp;rules, STAmount const &amp;balance, Number const &amp;frac, IsDeposit isDeposit)</div><div class="ttdoc">Round AMM deposit/withdrawal LPToken amount.</div><div class="ttdef"><b>Definition</b> <a href="AMMHelpers_8cpp_source.html#l00265">AMMHelpers.cpp:265</a></div></div>
<div class="ttc" id="anamespacexrpl_html_a7e0d13a8c7cf385e1ca9512163a0bf8a"><div class="ttname"><a href="namespacexrpl.html#a7e0d13a8c7cf385e1ca9512163a0bf8a">xrpl::adjustAssetInByTokens</a></div><div class="ttdeci">std::pair&lt; STAmount, STAmount &gt; adjustAssetInByTokens(Rules const &amp;rules, STAmount const &amp;balance, STAmount const &amp;amount, STAmount const &amp;lptAMMBalance, STAmount const &amp;tokens, std::uint16_t tfee)</div><div class="ttdef"><b>Definition</b> <a href="AMMHelpers_8cpp_source.html#l00299">AMMHelpers.cpp:299</a></div></div>
<div class="ttc" id="anamespacexrpl_html_a7e9da650aacdf189f9443bd2aaf976ed"><div class="ttname"><a href="namespacexrpl.html#a7e9da650aacdf189f9443bd2aaf976ed">xrpl::getAMMOfferStartWithTakerGets</a></div><div class="ttdeci">std::optional&lt; TAmounts&lt; TIn, TOut &gt; &gt; getAMMOfferStartWithTakerGets(TAmounts&lt; TIn, TOut &gt; const &amp;pool, Quality const &amp;targetQuality, std::uint16_t const &amp;tfee)</div><div class="ttdoc">Generate AMM offer starting with takerGets when AMM pool from the payment perspective is IOU(in)/XRP(...</div><div class="ttdef"><b>Definition</b> <a href="AMMHelpers_8h_source.html#l00162">AMMHelpers.h:162</a></div></div>
<div class="ttc" id="anamespacexrpl_html_a897488203b50a0d19c8798a1ab65c65c"><div class="ttname"><a href="namespacexrpl.html#a897488203b50a0d19c8798a1ab65c65c">xrpl::adjustAssetOutByTokens</a></div><div class="ttdeci">std::pair&lt; STAmount, STAmount &gt; adjustAssetOutByTokens(Rules const &amp;rules, STAmount const &amp;balance, STAmount const &amp;amount, STAmount const &amp;lptAMMBalance, STAmount const &amp;tokens, std::uint16_t tfee)</div><div class="ttdef"><b>Definition</b> <a href="AMMHelpers_8cpp_source.html#l00325">AMMHelpers.cpp:325</a></div></div>
<div class="ttc" id="anamespacexrpl_html_a9637d51d13101c99b44d26f7484a6f9c"><div class="ttname"><a href="namespacexrpl.html#a9637d51d13101c99b44d26f7484a6f9c">xrpl::getAMMOfferStartWithTakerPays</a></div><div class="ttdeci">std::optional&lt; TAmounts&lt; TIn, TOut &gt; &gt; getAMMOfferStartWithTakerPays(TAmounts&lt; TIn, TOut &gt; const &amp;pool, Quality const &amp;targetQuality, std::uint16_t tfee)</div><div class="ttdoc">Generate AMM offer starting with takerPays when AMM pool from the payment perspective is XRP(in)/IOU(...</div><div class="ttdef"><b>Definition</b> <a href="AMMHelpers_8h_source.html#l00225">AMMHelpers.h:225</a></div></div>
<div class="ttc" id="anamespacexrpl_html_a9642f0a8b029845edff291f4e3fe2166"><div class="ttname"><a href="namespacexrpl.html#a9642f0a8b029845edff291f4e3fe2166">xrpl::getRoundedAsset</a></div><div class="ttdeci">STAmount getRoundedAsset(Rules const &amp;rules, STAmount const &amp;balance, A const &amp;frac, IsDeposit isDeposit)</div><div class="ttdoc">Round AMM equal deposit/withdrawal amount.</div><div class="ttdef"><b>Definition</b> <a href="AMMHelpers_8h_source.html#l00596">AMMHelpers.h:596</a></div></div>
<div class="ttc" id="anamespacexrpl_html_aa0a361beb4e49cb6a4653ec984d997dc"><div class="ttname"><a href="namespacexrpl.html#aa0a361beb4e49cb6a4653ec984d997dc">xrpl::feeMult</a></div><div class="ttdeci">Number feeMult(std::uint16_t tfee)</div><div class="ttdoc">Get fee multiplier (1 - tfee) @tfee trading fee in basis points.</div><div class="ttdef"><b>Definition</b> <a href="AMMCore_8h_source.html#l00084">AMMCore.h:84</a></div></div>
<div class="ttc" id="anamespacexrpl_html_aa9ebaa68ee1380436934e0e1ab2068b2"><div class="ttname"><a href="namespacexrpl.html#aa9ebaa68ee1380436934e0e1ab2068b2">xrpl::solveQuadraticEqSmallest</a></div><div class="ttdeci">std::optional&lt; Number &gt; solveQuadraticEqSmallest(Number const &amp;a, Number const &amp;b, Number const &amp;c)</div><div class="ttdoc">Solve quadratic equation to find takerGets or takerPays.</div><div class="ttdef"><b>Definition</b> <a href="AMMHelpers_8cpp_source.html#l00225">AMMHelpers.cpp:225</a></div></div>
<div class="ttc" id="anamespacexrpl_html_ab334d11f65b71b91e2c6c907090398cb"><div class="ttname"><a href="namespacexrpl.html#ab334d11f65b71b91e2c6c907090398cb">xrpl::root2</a></div><div class="ttdeci">Number root2(Number f)</div><div class="ttdef"><b>Definition</b> <a href="Number_8cpp_source.html#l01010">Number.cpp:1010</a></div></div>
<div class="ttc" id="anamespacexrpl_html_aba7b68c01ad1bee502349df2eeca4ee7"><div class="ttname"><a href="namespacexrpl.html#aba7b68c01ad1bee502349df2eeca4ee7">xrpl::changeSpotPriceQuality</a></div><div class="ttdeci">std::optional&lt; TAmounts&lt; TIn, TOut &gt; &gt; changeSpotPriceQuality(TAmounts&lt; TIn, TOut &gt; const &amp;pool, Quality const &amp;quality, std::uint16_t tfee, Rules const &amp;rules, beast::Journal j)</div><div class="ttdoc">Generate AMM offer so that either updated Spot Price Quality (SPQ) is equal to LOB quality (in this c...</div><div class="ttdef"><b>Definition</b> <a href="AMMHelpers_8h_source.html#l00281">AMMHelpers.h:281</a></div></div>
<div class="ttc" id="anamespacexrpl_html_abdbadb99f2819d335af25338059c024d"><div class="ttname"><a href="namespacexrpl.html#abdbadb99f2819d335af25338059c024d">xrpl::ammAssetIn</a></div><div class="ttdeci">STAmount ammAssetIn(STAmount const &amp;asset1Balance, STAmount const &amp;lptAMMBalance, STAmount const &amp;lpTokens, std::uint16_t tfee)</div><div class="ttdoc">Calculate asset deposit given LP Tokens.</div><div class="ttdef"><b>Definition</b> <a href="AMMHelpers_8cpp_source.html#l00057">AMMHelpers.cpp:57</a></div></div>
<div class="ttc" id="anamespacexrpl_html_ac53efcd7320c16cbf784266098ebf0e7"><div class="ttname"><a href="namespacexrpl.html#ac53efcd7320c16cbf784266098ebf0e7">xrpl::adjustAmountsByLPTokens</a></div><div class="ttdeci">std::tuple&lt; STAmount, std::optional&lt; STAmount &gt;, STAmount &gt; adjustAmountsByLPTokens(STAmount const &amp;amountBalance, STAmount const &amp;amount, std::optional&lt; STAmount &gt; const &amp;amount2, STAmount const &amp;lptAMMBalance, STAmount const &amp;lpTokens, std::uint16_t tfee, IsDeposit isDeposit)</div><div class="ttdoc">Calls adjustLPTokens() and adjusts deposit or withdraw amounts if the adjusted LP tokens are less tha...</div><div class="ttdef"><b>Definition</b> <a href="AMMHelpers_8cpp_source.html#l00152">AMMHelpers.cpp:152</a></div></div>
<div class="ttc" id="anamespacexrpl_html_acbd9269cc6ee148cc8fe816d4f57a399"><div class="ttname"><a href="namespacexrpl.html#acbd9269cc6ee148cc8fe816d4f57a399">xrpl::lpTokensIn</a></div><div class="ttdeci">STAmount lpTokensIn(STAmount const &amp;asset1Balance, STAmount const &amp;asset1Withdraw, STAmount const &amp;lptAMMBalance, std::uint16_t tfee)</div><div class="ttdoc">Calculate LP Tokens given asset's withdraw amount.</div><div class="ttdef"><b>Definition</b> <a href="AMMHelpers_8cpp_source.html#l00084">AMMHelpers.cpp:84</a></div></div>
<div class="ttc" id="anamespacexrpl_html_acc61573879eaa546a305cad60f2de28b"><div class="ttname"><a href="namespacexrpl.html#acc61573879eaa546a305cad60f2de28b">xrpl::getFee</a></div><div class="ttdeci">Number getFee(std::uint16_t tfee)</div><div class="ttdoc">Convert to the fee from the basis points.</div><div class="ttdef"><b>Definition</b> <a href="AMMCore_8h_source.html#l00075">AMMCore.h:75</a></div></div>
<div class="ttc" id="anamespacexrpl_html_acd8dcc2ff08382ec2b1e01fa2749a25b"><div class="ttname"><a href="namespacexrpl.html#acd8dcc2ff08382ec2b1e01fa2749a25b">xrpl::swapAssetOut</a></div><div class="ttdeci">TIn swapAssetOut(TAmounts&lt; TIn, TOut &gt; const &amp;pool, TOut const &amp;assetOut, std::uint16_t tfee)</div><div class="ttdoc">Swap assetOut out of the pool and swap in a proportional amount of the other asset.</div><div class="ttdef"><b>Definition</b> <a href="AMMHelpers_8h_source.html#l00463">AMMHelpers.h:463</a></div></div>
<div class="ttc" id="anamespacexrpl_html_ad64c4c59078876e1cf6f5c7203f815e0"><div class="ttname"><a href="namespacexrpl.html#ad64c4c59078876e1cf6f5c7203f815e0">xrpl::withinRelativeDistance</a></div><div class="ttdeci">bool withinRelativeDistance(Quality const &amp;calcQuality, Quality const &amp;reqQuality, Number const &amp;dist)</div><div class="ttdoc">Check if the relative distance between the qualities is within the requested distance.</div><div class="ttdef"><b>Definition</b> <a href="AMMHelpers_8h_source.html#l00098">AMMHelpers.h:98</a></div></div>
<div class="ttc" id="anamespacexrpl_html_af445c7434a225c64374da975ec967c86"><div class="ttname"><a href="namespacexrpl.html#af445c7434a225c64374da975ec967c86">xrpl::square</a></div><div class="ttdeci">Number square(Number const &amp;n)</div><div class="ttdoc">Return square of n.</div><div class="ttdef"><b>Definition</b> <a href="AMMHelpers_8cpp_source.html#l00135">AMMHelpers.cpp:135</a></div></div>
<div class="ttc" id="anamespacexrpl_html_af922435a5bf5d571d5c2ea04c81b6cb1"><div class="ttname"><a href="namespacexrpl.html#af922435a5bf5d571d5c2ea04c81b6cb1">xrpl::lpTokensOut</a></div><div class="ttdeci">STAmount lpTokensOut(STAmount const &amp;asset1Balance, STAmount const &amp;asset1Deposit, STAmount const &amp;lptAMMBalance, std::uint16_t tfee)</div><div class="ttdoc">Calculate LP Tokens given asset's deposit amount.</div><div class="ttdef"><b>Definition</b> <a href="AMMHelpers_8cpp_source.html#l00022">AMMHelpers.cpp:22</a></div></div>
<div class="ttc" id="anamespacexrpl_html_afa772eaaed7a3a30339e41dddb0d3d3a"><div class="ttname"><a href="namespacexrpl.html#afa772eaaed7a3a30339e41dddb0d3d3a">xrpl::getIssue</a></div><div class="ttdeci">Issue getIssue(T const &amp;amt)</div><div class="ttdef"><b>Definition</b> <a href="AmountConversions_8h_source.html#l00153">AmountConversions.h:153</a></div></div>
<div class="ttc" id="aoptional_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/utility/optional.html">std::optional</a></div></div>
<div class="ttc" id="apair_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/utility/pair.html">std::pair</a></div></div>
<div class="ttc" id="atuple_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/utility/tuple.html">std::tuple</a></div></div>
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