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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_42b876eb66f74e25995e23a7c0222dc7.html">rpc</a></li><li class="navelem"><a class="el" href="dir_202f05fcc82d395fac3f43e301f5a49f.html">handlers</a></li> </ul>
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<div class="headertitle"><div class="title">LedgerDiff.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/rpc/GRPCHandlers.h&gt;</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="preprocessor">#include &lt;xrpld/rpc/detail/RPCLedgerHelpers.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="keyword">namespace </span><a class="code hl_namespace" href="namespacexrpl.html">xrpl</a> {</div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/utility/pair.html">std::pair&lt;org::xrpl::rpc::v1::GetLedgerDiffResponse, grpc::Status&gt;</a></div>
<div class="foldopen" id="foldopen00006" data-start="{" data-end="}">
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"><a class="line" href="namespacexrpl.html#a2a56eff57f6f83bed5691a62211577c6"> 6</a></span><a class="code hl_function" href="namespacexrpl.html#a2a56eff57f6f83bed5691a62211577c6">doLedgerDiffGrpc</a>(<a class="code hl_struct" href="structxrpl_1_1RPC_1_1GRPCContext.html">RPC::GRPCContext&lt;org::xrpl::rpc::v1::GetLedgerDiffRequest&gt;</a>&amp; context)</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> org::xrpl::rpc::v1::GetLedgerDiffRequest&amp; request = context.<a class="code hl_variable" href="structxrpl_1_1RPC_1_1GRPCContext.html#a75ddd2523c7bc474da3b6d3e7741b4e4">params</a>;</div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span> org::xrpl::rpc::v1::GetLedgerDiffResponse response;</div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span> grpc::Status status = grpc::Status::OK;</div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span> </div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/memory/shared_ptr.html">std::shared_ptr&lt;ReadView const&gt;</a> baseLedgerRv;</div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/memory/shared_ptr.html">std::shared_ptr&lt;ReadView const&gt;</a> desiredLedgerRv;</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="keywordflow">if</span> (<a class="code hl_function" href="namespacexrpl_1_1RPC.html#a39e21869e7514e3af27095d65afbf58e">RPC::ledgerFromSpecifier</a>(baseLedgerRv, request.base_ledger(), context))</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> grpc::Status errorStatus{grpc::StatusCode::NOT_FOUND, <span class="stringliteral">&quot;base ledger not found&quot;</span>};</div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span> <span class="keywordflow">return</span> {response, errorStatus};</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 class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span> <span class="keywordflow">if</span> (<a class="code hl_function" href="namespacexrpl_1_1RPC.html#a39e21869e7514e3af27095d65afbf58e">RPC::ledgerFromSpecifier</a>(desiredLedgerRv, request.desired_ledger(), context))</div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span> {</div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span> grpc::Status errorStatus{grpc::StatusCode::NOT_FOUND, <span class="stringliteral">&quot;desired ledger not found&quot;</span>};</div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span> <span class="keywordflow">return</span> {response, errorStatus};</div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span> }</div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> </div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/memory/shared_ptr.html">std::shared_ptr&lt;Ledger const&gt;</a> baseLedger = <a class="code hl_variableRef" href="http://en.cppreference.com/w/cpp/types/is_same.html">std::dynamic_pointer_cast&lt;Ledger const&gt;</a>(baseLedgerRv);</div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span> <span class="keywordflow">if</span> (!baseLedger)</div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> {</div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span> grpc::Status errorStatus{grpc::StatusCode::NOT_FOUND, <span class="stringliteral">&quot;base ledger not validated&quot;</span>};</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> <span class="keywordflow">return</span> {response, errorStatus};</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> }</div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> </div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/memory/shared_ptr.html">std::shared_ptr&lt;Ledger const&gt;</a> desiredLedger = <a class="code hl_variableRef" href="http://en.cppreference.com/w/cpp/types/is_same.html">std::dynamic_pointer_cast&lt;Ledger const&gt;</a>(desiredLedgerRv);</div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> <span class="keywordflow">if</span> (!desiredLedger)</div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> {</div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> grpc::Status errorStatus{grpc::StatusCode::NOT_FOUND, <span class="stringliteral">&quot;base ledger not validated&quot;</span>};</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> <span class="keywordflow">return</span> {response, errorStatus};</div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> }</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> </div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/container/map.html">SHAMap::Delta</a> differences;</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="keywordtype">int</span> maxDifferences = <a class="code hl_functionRef" href="http://en.cppreference.com/w/cpp/types/numeric_limits/max.html">std::numeric_limits&lt;int&gt;::max</a>();</div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> </div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> <span class="keywordtype">bool</span> res = baseLedger-&gt;stateMap().compare(desiredLedger-&gt;stateMap(), differences, maxDifferences);</div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> <span class="keywordflow">if</span> (!res)</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> {</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> grpc::Status errorStatus{</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> grpc::StatusCode::RESOURCE_EXHAUSTED, <span class="stringliteral">&quot;too many differences between specified ledgers&quot;</span>};</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> <span class="keywordflow">return</span> {response, errorStatus};</div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> }</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> </div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> <span class="keywordflow">for</span> (<span class="keyword">auto</span>&amp; [k, v] : differences)</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> <span class="keyword">auto</span> diff = response.mutable_ledger_objects()-&gt;add_objects();</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> <span class="keyword">auto</span> inBase = v.first;</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> <span class="keyword">auto</span> inDesired = v.second;</div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> </div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> <span class="comment">// key does not exist in desired</span></div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> <span class="keywordflow">if</span> (!inDesired)</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> {</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> diff-&gt;set_key(k.data(), k.size());</div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> }</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> <span class="keywordflow">else</span></div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> {</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> XRPL_ASSERT(inDesired-&gt;size() &gt; 0, <span class="stringliteral">&quot;xrpl::doLedgerDiffGrpc : non-empty desired&quot;</span>);</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> diff-&gt;set_key(k.data(), k.size());</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> <span class="keywordflow">if</span> (request.include_blobs())</div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> {</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> diff-&gt;set_data(inDesired-&gt;data(), inDesired-&gt;size());</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> }</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> }</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> }</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> <span class="keywordflow">return</span> {response, status};</div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span>}</div>
</div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> </div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span>} <span class="comment">// namespace xrpl</span></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="amap_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/container/map.html">std::map</a></div></div>
<div class="ttc" id="amax_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/types/numeric_limits/max.html">std::numeric_limits::max</a></div><div class="ttdeci">T max(T... args)</div></div>
<div class="ttc" id="anamespacexrpl_1_1RPC_html_a39e21869e7514e3af27095d65afbf58e"><div class="ttname"><a href="namespacexrpl_1_1RPC.html#a39e21869e7514e3af27095d65afbf58e">xrpl::RPC::ledgerFromSpecifier</a></div><div class="ttdeci">Status ledgerFromSpecifier(T &amp;ledger, org::xrpl::rpc::v1::LedgerSpecifier const &amp;specifier, Context const &amp;context)</div><div class="ttdoc">Retrieves a ledger based on a LedgerSpecifier.</div><div class="ttdef"><b>Definition</b> <a href="RPCLedgerHelpers_8cpp_source.html#l00142">RPCLedgerHelpers.cpp:142</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#l00006">algorithm.h:6</a></div></div>
<div class="ttc" id="anamespacexrpl_html_a2a56eff57f6f83bed5691a62211577c6"><div class="ttname"><a href="namespacexrpl.html#a2a56eff57f6f83bed5691a62211577c6">xrpl::doLedgerDiffGrpc</a></div><div class="ttdeci">std::pair&lt; org::xrpl::rpc::v1::GetLedgerDiffResponse, grpc::Status &gt; doLedgerDiffGrpc(RPC::GRPCContext&lt; org::xrpl::rpc::v1::GetLedgerDiffRequest &gt; &amp;context)</div><div class="ttdef"><b>Definition</b> <a href="LedgerDiff_8cpp_source.html#l00006">LedgerDiff.cpp:6</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="ashared_ptr_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/memory/shared_ptr.html">std::shared_ptr</a></div></div>
<div class="ttc" id="astructxrpl_1_1RPC_1_1GRPCContext_html"><div class="ttname"><a href="structxrpl_1_1RPC_1_1GRPCContext.html">xrpl::RPC::GRPCContext</a></div><div class="ttdef"><b>Definition</b> <a href="Context_8h_source.html#l00050">Context.h:51</a></div></div>
<div class="ttc" id="astructxrpl_1_1RPC_1_1GRPCContext_html_a75ddd2523c7bc474da3b6d3e7741b4e4"><div class="ttname"><a href="structxrpl_1_1RPC_1_1GRPCContext.html#a75ddd2523c7bc474da3b6d3e7741b4e4">xrpl::RPC::GRPCContext::params</a></div><div class="ttdeci">RequestType params</div><div class="ttdef"><b>Definition</b> <a href="Context_8h_source.html#l00052">Context.h:52</a></div></div>
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