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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_a6d14a898e5042b88feceb06bece5732.html">paths</a></li><li class="navelem"><a class="el" href="dir_4236dcdf923f97c252e0c826c4e7f6d7.html">detail</a></li> </ul>
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<div class="headertitle"><div class="title">AMMOffer.cpp</div></div>
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<div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="preprocessor">#include &lt;xrpld/app/paths/AMMLiquidity.h&gt;</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="preprocessor">#include &lt;xrpld/app/paths/AMMOffer.h&gt;</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span> </div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="preprocessor">#include &lt;xrpl/protocol/QualityFunction.h&gt;</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span> </div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceripple.html">ripple</a> {</div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span> </div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> TIn, <span class="keyword">typename</span> TOut&gt;</div>
<div class="foldopen" id="foldopen00009" data-start="{" data-end="}">
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"><a class="line" href="classripple_1_1AMMOffer.html#a209f16af670729ea5e5789856c0ad49f"> 9</a></span><a class="code hl_function" href="classripple_1_1AMMOffer.html#a209f16af670729ea5e5789856c0ad49f">AMMOffer&lt;TIn, TOut&gt;::AMMOffer</a>(</div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span> <a class="code hl_class" href="classripple_1_1AMMLiquidity.html">AMMLiquidity&lt;TIn, TOut&gt;</a> <span class="keyword">const</span>&amp; ammLiquidity,</div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span> TAmounts&lt;TIn, TOut&gt; <span class="keyword">const</span>&amp; amounts,</div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span> TAmounts&lt;TIn, TOut&gt; <span class="keyword">const</span>&amp; balances,</div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span> Quality <span class="keyword">const</span>&amp; quality)</div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span> : ammLiquidity_(ammLiquidity)</div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span> , amounts_(amounts)</div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span> , balances_(balances)</div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span> , quality_(quality)</div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span> , consumed_(false)</div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span>{</div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span>}</div>
</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">template</span> &lt;<span class="keyword">typename</span> TIn, <span class="keyword">typename</span> TOut&gt;</div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span><a class="code hl_class" href="classripple_1_1Issue.html">Issue</a> <span class="keyword">const</span>&amp;</div>
<div class="foldopen" id="foldopen00024" data-start="{" data-end="}">
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"><a class="line" href="classripple_1_1AMMOffer.html#ad6eff87d977b5a80f1a07660b455a6db"> 24</a></span><a class="code hl_function" href="classripple_1_1AMMOffer.html#ad6eff87d977b5a80f1a07660b455a6db">AMMOffer&lt;TIn, TOut&gt;::issueIn</a>()<span class="keyword"> const</span></div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> <span class="keywordflow">return</span> ammLiquidity_.issueIn();</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="keyword">template</span> &lt;<span class="keyword">typename</span> TIn, <span class="keyword">typename</span> TOut&gt;</div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span><a class="code hl_class" href="classripple_1_1base__uint.html">AccountID</a> <span class="keyword">const</span>&amp;</div>
<div class="foldopen" id="foldopen00031" data-start="{" data-end="}">
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"><a class="line" href="classripple_1_1AMMOffer.html#a2c97fe4fa25accdb68dc5d76a110acce"> 31</a></span><a class="code hl_function" href="classripple_1_1AMMOffer.html#a2c97fe4fa25accdb68dc5d76a110acce">AMMOffer&lt;TIn, TOut&gt;::owner</a>()<span class="keyword"> const</span></div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> <span class="keywordflow">return</span> ammLiquidity_.ammAccount();</div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span>}</div>
</div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> </div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</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="l00037" name="l00037"></a><span class="lineno"> 37</span>TAmounts&lt;TIn, TOut&gt; <span class="keyword">const</span>&amp;</div>
<div class="foldopen" id="foldopen00038" data-start="{" data-end="}">
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"><a class="line" href="classripple_1_1AMMOffer.html#ae00679ef074c1566c961189dbe3c6768"> 38</a></span><a class="code hl_function" href="classripple_1_1AMMOffer.html#ae00679ef074c1566c961189dbe3c6768">AMMOffer&lt;TIn, TOut&gt;::amount</a>()<span class="keyword"> const</span></div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> <span class="keywordflow">return</span> amounts_;</div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span>}</div>
</div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> </div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</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="l00044" name="l00044"></a><span class="lineno"> 44</span><span class="keywordtype">void</span></div>
<div class="foldopen" id="foldopen00045" data-start="{" data-end="}">
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"><a class="line" href="classripple_1_1AMMOffer.html#a8856f999ea2ba636a2c74e642d4bb329"> 45</a></span><a class="code hl_function" href="classripple_1_1AMMOffer.html#a8856f999ea2ba636a2c74e642d4bb329">AMMOffer&lt;TIn, TOut&gt;::consume</a>(</div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> <a class="code hl_class" href="classripple_1_1ApplyView.html">ApplyView</a>&amp; view,</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> TAmounts&lt;TIn, TOut&gt; <span class="keyword">const</span>&amp; consumed)</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span>{</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> <span class="comment">// Consumed offer must be less or equal to the original</span></div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> <span class="keywordflow">if</span> (consumed.in &gt; amounts_.in || consumed.out &gt; amounts_.out)</div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> Throw&lt;std::logic_error&gt;(<span class="stringliteral">&quot;Invalid consumed AMM offer.&quot;</span>);</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> <span class="comment">// AMM pool is updated when the amounts are transferred</span></div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> <span class="comment">// in BookStep::consumeOffer().</span></div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> </div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> consumed_ = <span class="keyword">true</span>;</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> </div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> <span class="comment">// Let the context know AMM offer is consumed</span></div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> ammLiquidity_.context().setAMMUsed();</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span>}</div>
</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> </div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</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="l00062" name="l00062"></a><span class="lineno"> 62</span>TAmounts&lt;TIn, TOut&gt;</div>
<div class="foldopen" id="foldopen00063" data-start="{" data-end="}">
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"><a class="line" href="classripple_1_1AMMOffer.html#a3892b94c6284c67b7bf1e388a26ba11c"> 63</a></span><a class="code hl_function" href="classripple_1_1AMMOffer.html#a3892b94c6284c67b7bf1e388a26ba11c">AMMOffer&lt;TIn, TOut&gt;::limitOut</a>(</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> TAmounts&lt;TIn, TOut&gt; <span class="keyword">const</span>&amp; offrAmt,</div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> TOut <span class="keyword">const</span>&amp; limit,</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> <span class="keywordtype">bool</span> roundUp)<span class="keyword"> const</span></div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> <span class="comment">// Change the offer size proportionally to the original offer quality</span></div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> <span class="comment">// to keep the strands quality order unchanged. The taker pays slightly</span></div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> <span class="comment">// more for the offer in this case, which results in a slightly higher</span></div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> <span class="comment">// pool product than the original pool product. I.e. if the original</span></div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> <span class="comment">// pool is poolPays, poolGets and the offer is assetIn, assetOut then</span></div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> <span class="comment">// poolPays * poolGets &lt; (poolPays - assetOut) * (poolGets + assetIn)</span></div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> <span class="keywordflow">if</span> (ammLiquidity_.multiPath())</div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> {</div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> <span class="comment">// It turns out that the ceil_out implementation has some slop in</span></div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> <span class="comment">// it, which ceil_out_strict removes.</span></div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> <span class="keywordflow">return</span> quality().ceil_out_strict(offrAmt, limit, roundUp);</div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> }</div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> <span class="comment">// Change the offer size according to the conservation function. The offer</span></div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> <span class="comment">// quality is increased in this case, but it doesn&#39;t matter since there is</span></div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> <span class="comment">// only one path.</span></div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> <span class="keywordflow">return</span> {<a class="code hl_function" href="namespaceripple.html#affb9400cd4cf6d952445bf00803cc92f">swapAssetOut</a>(balances_, limit, ammLiquidity_.tradingFee()), limit};</div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span>}</div>
</div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> </div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</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="l00087" name="l00087"></a><span class="lineno"> 87</span>TAmounts&lt;TIn, TOut&gt;</div>
<div class="foldopen" id="foldopen00088" data-start="{" data-end="}">
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"><a class="line" href="classripple_1_1AMMOffer.html#a8aa2c24c93334f8741d7798df5aa97fc"> 88</a></span><a class="code hl_function" href="classripple_1_1AMMOffer.html#a8aa2c24c93334f8741d7798df5aa97fc">AMMOffer&lt;TIn, TOut&gt;::limitIn</a>(</div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span> TAmounts&lt;TIn, TOut&gt; <span class="keyword">const</span>&amp; offrAmt,</div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span> TIn <span class="keyword">const</span>&amp; limit,</div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span> <span class="keywordtype">bool</span> roundUp)<span class="keyword"> const</span></div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span> <span class="comment">// See the comments above in limitOut().</span></div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span> <span class="keywordflow">if</span> (ammLiquidity_.multiPath())</div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span> {</div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span> <span class="keywordflow">if</span> (<span class="keyword">auto</span> <span class="keyword">const</span>&amp; rules = <a class="code hl_function" href="namespaceripple.html#ac46ee7ce49b6deed89f70a94924c416f">getCurrentTransactionRules</a>();</div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span> rules &amp;&amp; rules-&gt;enabled(fixReducedOffersV2))</div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span> <span class="keywordflow">return</span> quality().ceil_in_strict(offrAmt, limit, roundUp);</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">return</span> quality().ceil_in(offrAmt, limit);</div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span> }</div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> <span class="keywordflow">return</span> {limit, <a class="code hl_function" href="namespaceripple.html#a46ef81e270b726cb937bec7c0e0c8115">swapAssetIn</a>(balances_, limit, ammLiquidity_.tradingFee())};</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span>}</div>
</div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> </div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</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="l00106" name="l00106"></a><span class="lineno"> 106</span><a class="code hl_class" href="classripple_1_1QualityFunction.html">QualityFunction</a></div>
<div class="foldopen" id="foldopen00107" data-start="{" data-end="}">
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"><a class="line" href="classripple_1_1AMMOffer.html#aedb2204df9f80970d1356c8e1997ca35"> 107</a></span><a class="code hl_function" href="classripple_1_1AMMOffer.html#aedb2204df9f80970d1356c8e1997ca35">AMMOffer&lt;TIn, TOut&gt;::getQualityFunc</a>()<span class="keyword"> const</span></div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> <span class="keywordflow">if</span> (ammLiquidity_.multiPath())</div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span> <span class="keywordflow">return</span> <a class="code hl_class" href="classripple_1_1QualityFunction.html">QualityFunction</a>{quality(), <a class="code hl_struct" href="structripple_1_1QualityFunction_1_1CLOBLikeTag.html">QualityFunction::CLOBLikeTag</a>{}};</div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span> <span class="keywordflow">return</span> <a class="code hl_class" href="classripple_1_1QualityFunction.html">QualityFunction</a>{</div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span> balances_, ammLiquidity_.tradingFee(), <a class="code hl_struct" href="structripple_1_1QualityFunction_1_1AMMTag.html">QualityFunction::AMMTag</a>{}};</div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span>}</div>
</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span> </div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</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="l00116" name="l00116"></a><span class="lineno"> 116</span><span class="keywordtype">bool</span></div>
<div class="foldopen" id="foldopen00117" data-start="{" data-end="}">
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"><a class="line" href="classripple_1_1AMMOffer.html#a5d6bfd83553cd0ea0f242da69f13eeb2"> 117</a></span><a class="code hl_function" href="classripple_1_1AMMOffer.html#a5d6bfd83553cd0ea0f242da69f13eeb2">AMMOffer&lt;TIn, TOut&gt;::checkInvariant</a>(</div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> TAmounts&lt;TIn, TOut&gt; <span class="keyword">const</span>&amp; consumed,</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> <a class="code hl_class" href="classbeast_1_1Journal.html">beast::Journal</a> j)<span class="keyword"> const</span></div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span> <span class="keywordflow">if</span> (consumed.in &gt; amounts_.in || consumed.out &gt; amounts_.out)</div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span> {</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span> JLOG(j.<a class="code hl_function" href="classbeast_1_1Journal.html#a49b0713e65bb8e2c51b76fbf16252afe">error</a>()) &lt;&lt; <span class="stringliteral">&quot;AMMOffer::checkInvariant failed: consumed &quot;</span></div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span> &lt;&lt; <a class="code hl_function" href="namespaceripple.html#ac124fe6744b7fe887dec949b56b16d50">to_string</a>(consumed.in) &lt;&lt; <span class="stringliteral">&quot; &quot;</span></div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span> &lt;&lt; <a class="code hl_function" href="namespaceripple.html#ac124fe6744b7fe887dec949b56b16d50">to_string</a>(consumed.out) &lt;&lt; <span class="stringliteral">&quot; amounts &quot;</span></div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span> &lt;&lt; <a class="code hl_function" href="namespaceripple.html#ac124fe6744b7fe887dec949b56b16d50">to_string</a>(amounts_.in) &lt;&lt; <span class="stringliteral">&quot; &quot;</span></div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"> 127</span> &lt;&lt; <a class="code hl_function" href="namespaceripple.html#ac124fe6744b7fe887dec949b56b16d50">to_string</a>(amounts_.out);</div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span> </div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"> 130</span> }</div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span> </div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno"> 132</span> <a class="code hl_class" href="classripple_1_1Number.html">Number</a> <span class="keyword">const</span> product = balances_.in * balances_.out;</div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"> 133</span> <span class="keyword">auto</span> <span class="keyword">const</span> newBalances = TAmounts&lt;TIn, TOut&gt;{</div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span> balances_.in + consumed.in, balances_.out - consumed.out};</div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span> <a class="code hl_class" href="classripple_1_1Number.html">Number</a> <span class="keyword">const</span> newProduct = newBalances.in * newBalances.out;</div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span> </div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> <span class="keywordflow">if</span> (newProduct &gt;= product ||</div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span> <a class="code hl_function" href="namespaceripple.html#aea954383230f579cb080646b898088a5">withinRelativeDistance</a>(product, newProduct, <a class="code hl_class" href="classripple_1_1Number.html">Number</a>{1, -7}))</div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno"> 139</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno"> 140</span> </div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"> 141</span> JLOG(j.<a class="code hl_function" href="classbeast_1_1Journal.html#a49b0713e65bb8e2c51b76fbf16252afe">error</a>()) &lt;&lt; <span class="stringliteral">&quot;AMMOffer::checkInvariant failed: balances &quot;</span></div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno"> 142</span> &lt;&lt; <a class="code hl_function" href="namespaceripple.html#ac124fe6744b7fe887dec949b56b16d50">to_string</a>(balances_.in) &lt;&lt; <span class="stringliteral">&quot; &quot;</span></div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno"> 143</span> &lt;&lt; <a class="code hl_function" href="namespaceripple.html#ac124fe6744b7fe887dec949b56b16d50">to_string</a>(balances_.out) &lt;&lt; <span class="stringliteral">&quot; new balances &quot;</span></div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span> &lt;&lt; <a class="code hl_function" href="namespaceripple.html#ac124fe6744b7fe887dec949b56b16d50">to_string</a>(newBalances.in) &lt;&lt; <span class="stringliteral">&quot; &quot;</span></div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span> &lt;&lt; <a class="code hl_function" href="namespaceripple.html#ac124fe6744b7fe887dec949b56b16d50">to_string</a>(newBalances.out) &lt;&lt; <span class="stringliteral">&quot; product/newProduct &quot;</span></div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"> 146</span> &lt;&lt; product &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; newProduct &lt;&lt; <span class="stringliteral">&quot; diff &quot;</span></div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span> &lt;&lt; (product != <a class="code hl_class" href="classripple_1_1Number.html">Number</a>{0}</div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"> 148</span> ? <a class="code hl_function" href="namespaceripple.html#ac124fe6744b7fe887dec949b56b16d50">to_string</a>((product - newProduct) / product)</div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno"> 149</span> : <span class="stringliteral">&quot;undefined&quot;</span>);</div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno"> 150</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"> 151</span>}</div>
</div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno"> 152</span> </div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno"> 153</span><span class="keyword">template</span> <span class="keyword">class </span><a class="code hl_class" href="classripple_1_1AMMOffer.html">AMMOffer&lt;STAmount, STAmount&gt;</a>;</div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"> 154</span><span class="keyword">template</span> <span class="keyword">class </span><a class="code hl_class" href="classripple_1_1AMMOffer.html">AMMOffer&lt;IOUAmount, IOUAmount&gt;</a>;</div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"> 155</span><span class="keyword">template</span> <span class="keyword">class </span><a class="code hl_class" href="classripple_1_1AMMOffer.html">AMMOffer&lt;XRPAmount, IOUAmount&gt;</a>;</div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno"> 156</span><span class="keyword">template</span> <span class="keyword">class </span><a class="code hl_class" href="classripple_1_1AMMOffer.html">AMMOffer&lt;IOUAmount, XRPAmount&gt;</a>;</div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"> 157</span> </div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno"> 158</span>} <span class="comment">// namespace ripple</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#l00040">Journal.h:41</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#l00327">Journal.h:327</a></div></div>
<div class="ttc" id="aclassripple_1_1AMMLiquidity_html"><div class="ttname"><a href="classripple_1_1AMMLiquidity.html">ripple::AMMLiquidity</a></div><div class="ttdoc">AMMLiquidity class provides AMM offers to BookStep class.</div><div class="ttdef"><b>Definition</b> <a href="AMMLiquidity_8h_source.html#l00033">AMMLiquidity.h:34</a></div></div>
<div class="ttc" id="aclassripple_1_1AMMOffer_html"><div class="ttname"><a href="classripple_1_1AMMOffer.html">ripple::AMMOffer</a></div><div class="ttdoc">Represents synthetic AMM offer in BookStep.</div><div class="ttdef"><b>Definition</b> <a href="AMMOffer_8h_source.html#l00020">AMMOffer.h:21</a></div></div>
<div class="ttc" id="aclassripple_1_1AMMOffer_html_a209f16af670729ea5e5789856c0ad49f"><div class="ttname"><a href="classripple_1_1AMMOffer.html#a209f16af670729ea5e5789856c0ad49f">ripple::AMMOffer::AMMOffer</a></div><div class="ttdeci">AMMOffer(AMMLiquidity&lt; TIn, TOut &gt; const &amp;ammLiquidity, TAmounts&lt; TIn, TOut &gt; const &amp;amounts, TAmounts&lt; TIn, TOut &gt; const &amp;balances, Quality const &amp;quality)</div><div class="ttdef"><b>Definition</b> <a href="AMMOffer_8cpp_source.html#l00009">AMMOffer.cpp:9</a></div></div>
<div class="ttc" id="aclassripple_1_1AMMOffer_html_a2c97fe4fa25accdb68dc5d76a110acce"><div class="ttname"><a href="classripple_1_1AMMOffer.html#a2c97fe4fa25accdb68dc5d76a110acce">ripple::AMMOffer::owner</a></div><div class="ttdeci">AccountID const &amp; owner() const</div><div class="ttdef"><b>Definition</b> <a href="AMMOffer_8cpp_source.html#l00031">AMMOffer.cpp:31</a></div></div>
<div class="ttc" id="aclassripple_1_1AMMOffer_html_a3892b94c6284c67b7bf1e388a26ba11c"><div class="ttname"><a href="classripple_1_1AMMOffer.html#a3892b94c6284c67b7bf1e388a26ba11c">ripple::AMMOffer::limitOut</a></div><div class="ttdeci">TAmounts&lt; TIn, TOut &gt; limitOut(TAmounts&lt; TIn, TOut &gt; const &amp;offrAmt, TOut const &amp;limit, bool roundUp) const</div><div class="ttdoc">Limit out of the provided offer.</div><div class="ttdef"><b>Definition</b> <a href="AMMOffer_8cpp_source.html#l00063">AMMOffer.cpp:63</a></div></div>
<div class="ttc" id="aclassripple_1_1AMMOffer_html_a5d6bfd83553cd0ea0f242da69f13eeb2"><div class="ttname"><a href="classripple_1_1AMMOffer.html#a5d6bfd83553cd0ea0f242da69f13eeb2">ripple::AMMOffer::checkInvariant</a></div><div class="ttdeci">bool checkInvariant(TAmounts&lt; TIn, TOut &gt; const &amp;consumed, beast::Journal j) const</div><div class="ttdoc">Check the new pool product is greater or equal to the old pool product or if decreases then within so...</div><div class="ttdef"><b>Definition</b> <a href="AMMOffer_8cpp_source.html#l00117">AMMOffer.cpp:117</a></div></div>
<div class="ttc" id="aclassripple_1_1AMMOffer_html_a8856f999ea2ba636a2c74e642d4bb329"><div class="ttname"><a href="classripple_1_1AMMOffer.html#a8856f999ea2ba636a2c74e642d4bb329">ripple::AMMOffer::consume</a></div><div class="ttdeci">void consume(ApplyView &amp;view, TAmounts&lt; TIn, TOut &gt; const &amp;consumed)</div><div class="ttdef"><b>Definition</b> <a href="AMMOffer_8cpp_source.html#l00045">AMMOffer.cpp:45</a></div></div>
<div class="ttc" id="aclassripple_1_1AMMOffer_html_a8aa2c24c93334f8741d7798df5aa97fc"><div class="ttname"><a href="classripple_1_1AMMOffer.html#a8aa2c24c93334f8741d7798df5aa97fc">ripple::AMMOffer::limitIn</a></div><div class="ttdeci">TAmounts&lt; TIn, TOut &gt; limitIn(TAmounts&lt; TIn, TOut &gt; const &amp;offrAmt, TIn const &amp;limit, bool roundUp) const</div><div class="ttdoc">Limit in of the provided offer.</div><div class="ttdef"><b>Definition</b> <a href="AMMOffer_8cpp_source.html#l00088">AMMOffer.cpp:88</a></div></div>
<div class="ttc" id="aclassripple_1_1AMMOffer_html_ad6eff87d977b5a80f1a07660b455a6db"><div class="ttname"><a href="classripple_1_1AMMOffer.html#ad6eff87d977b5a80f1a07660b455a6db">ripple::AMMOffer::issueIn</a></div><div class="ttdeci">Issue const &amp; issueIn() const</div><div class="ttdef"><b>Definition</b> <a href="AMMOffer_8cpp_source.html#l00024">AMMOffer.cpp:24</a></div></div>
<div class="ttc" id="aclassripple_1_1AMMOffer_html_ae00679ef074c1566c961189dbe3c6768"><div class="ttname"><a href="classripple_1_1AMMOffer.html#ae00679ef074c1566c961189dbe3c6768">ripple::AMMOffer::amount</a></div><div class="ttdeci">TAmounts&lt; TIn, TOut &gt; const &amp; amount() const</div><div class="ttdef"><b>Definition</b> <a href="AMMOffer_8cpp_source.html#l00038">AMMOffer.cpp:38</a></div></div>
<div class="ttc" id="aclassripple_1_1AMMOffer_html_aedb2204df9f80970d1356c8e1997ca35"><div class="ttname"><a href="classripple_1_1AMMOffer.html#aedb2204df9f80970d1356c8e1997ca35">ripple::AMMOffer::getQualityFunc</a></div><div class="ttdeci">QualityFunction getQualityFunc() const</div><div class="ttdef"><b>Definition</b> <a href="AMMOffer_8cpp_source.html#l00107">AMMOffer.cpp:107</a></div></div>
<div class="ttc" id="aclassripple_1_1ApplyView_html"><div class="ttname"><a href="classripple_1_1ApplyView.html">ripple::ApplyView</a></div><div class="ttdoc">Writeable view to a ledger, for applying a transaction.</div><div class="ttdef"><b>Definition</b> <a href="ApplyView_8h_source.html#l00123">ApplyView.h:124</a></div></div>
<div class="ttc" id="aclassripple_1_1Issue_html"><div class="ttname"><a href="classripple_1_1Issue.html">ripple::Issue</a></div><div class="ttdoc">A currency issued by an account.</div><div class="ttdef"><b>Definition</b> <a href="Issue_8h_source.html#l00013">Issue.h:14</a></div></div>
<div class="ttc" id="aclassripple_1_1Number_html"><div class="ttname"><a href="classripple_1_1Number.html">ripple::Number</a></div><div class="ttdef"><b>Definition</b> <a href="Number_8h_source.html#l00016">Number.h:17</a></div></div>
<div class="ttc" id="aclassripple_1_1QualityFunction_html"><div class="ttname"><a href="classripple_1_1QualityFunction.html">ripple::QualityFunction</a></div><div class="ttdoc">Average quality of a path as a function of out: q(out) = m * out + b, where m = -1 / poolGets,...</div><div class="ttdef"><b>Definition</b> <a href="QualityFunction_8h_source.html#l00020">QualityFunction.h:21</a></div></div>
<div class="ttc" id="aclassripple_1_1base__uint_html"><div class="ttname"><a href="classripple_1_1base__uint.html">ripple::base_uint&lt; 160, detail::AccountIDTag &gt;</a></div></div>
<div class="ttc" id="anamespaceripple_html"><div class="ttname"><a href="namespaceripple.html">ripple</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#l00006">algorithm.h:6</a></div></div>
<div class="ttc" id="anamespaceripple_html_a46ef81e270b726cb937bec7c0e0c8115"><div class="ttname"><a href="namespaceripple.html#a46ef81e270b726cb937bec7c0e0c8115">ripple::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#l00445">AMMHelpers.h:445</a></div></div>
<div class="ttc" id="anamespaceripple_html_ac124fe6744b7fe887dec949b56b16d50"><div class="ttname"><a href="namespaceripple.html#ac124fe6744b7fe887dec949b56b16d50">ripple::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#l00611">base_uint.h:611</a></div></div>
<div class="ttc" id="anamespaceripple_html_ac46ee7ce49b6deed89f70a94924c416f"><div class="ttname"><a href="namespaceripple.html#ac46ee7ce49b6deed89f70a94924c416f">ripple::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#l00028">Rules.cpp:28</a></div></div>
<div class="ttc" id="anamespaceripple_html_aea954383230f579cb080646b898088a5"><div class="ttname"><a href="namespaceripple.html#aea954383230f579cb080646b898088a5">ripple::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#l00110">AMMHelpers.h:110</a></div></div>
<div class="ttc" id="anamespaceripple_html_affb9400cd4cf6d952445bf00803cc92f"><div class="ttname"><a href="namespaceripple.html#affb9400cd4cf6d952445bf00803cc92f">ripple::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#l00518">AMMHelpers.h:518</a></div></div>
<div class="ttc" id="astructripple_1_1QualityFunction_1_1AMMTag_html"><div class="ttname"><a href="structripple_1_1QualityFunction_1_1AMMTag.html">ripple::QualityFunction::AMMTag</a></div><div class="ttdef"><b>Definition</b> <a href="QualityFunction_8h_source.html#l00031">QualityFunction.h:32</a></div></div>
<div class="ttc" id="astructripple_1_1QualityFunction_1_1CLOBLikeTag_html"><div class="ttname"><a href="structripple_1_1QualityFunction_1_1CLOBLikeTag.html">ripple::QualityFunction::CLOBLikeTag</a></div><div class="ttdef"><b>Definition</b> <a href="QualityFunction_8h_source.html#l00036">QualityFunction.h:37</a></div></div>
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