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<a href="chain_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Copyright (c) 2009-2010 Satoshi Nakamoto</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// Copyright (c) 2009-2014 The Bitcoin Core developers</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// Distributed under the MIT software license, see the accompanying</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// file COPYING or http://www.opensource.org/licenses/mit-license.php.</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> </div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="preprocessor">#include "<a class="code" href="chain_8h.html">chain.h</a>"</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> </div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="keyword">using namespace </span><a class="code" href="namespacestd.html">std</a>;</div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> </div><div class="line"><a name="l00013"></a><span class="lineno"><a class="line" href="classCChain.html#aeb563751f7362d4308c7c2cb35b834a5"> 13</a></span> <span class="keywordtype">void</span> <a class="code" href="classCChain.html#aeb563751f7362d4308c7c2cb35b834a5">CChain::SetTip</a>(<a class="code" href="classCBlockIndex.html">CBlockIndex</a> *pindex) {</div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span>  <span class="keywordflow">if</span> (pindex == NULL) {</div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span>  vChain.clear();</div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  }</div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  vChain.resize(pindex-><a class="code" href="classCBlockIndex.html#aebfc8d6b95852546760e742553d7bfd5">nHeight</a> + 1);</div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  <span class="keywordflow">while</span> (pindex && vChain[pindex-><a class="code" href="classCBlockIndex.html#aebfc8d6b95852546760e742553d7bfd5">nHeight</a>] != pindex) {</div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  vChain[pindex-><a class="code" href="classCBlockIndex.html#aebfc8d6b95852546760e742553d7bfd5">nHeight</a>] = pindex;</div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  pindex = pindex-><a class="code" href="classCBlockIndex.html#a1ef11137155df1dd5c81491630cece39">pprev</a>;</div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  }</div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> }</div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div><div class="line"><a name="l00025"></a><span class="lineno"><a class="line" href="classCChain.html#a03e98bebe804bfba219b4e6a2b858d9f"> 25</a></span> <a class="code" href="structCBlockLocator.html">CBlockLocator</a> <a class="code" href="classCChain.html#a03e98bebe804bfba219b4e6a2b858d9f">CChain::GetLocator</a>(<span class="keyword">const</span> <a class="code" href="classCBlockIndex.html">CBlockIndex</a> *pindex)<span class="keyword"> const </span>{</div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  <span class="keywordtype">int</span> nStep = 1;</div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  std::vector<uint256> vHave;</div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  vHave.reserve(32);</div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="keywordflow">if</span> (!pindex)</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  pindex = Tip();</div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="keywordflow">while</span> (pindex) {</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  vHave.push_back(pindex-><a class="code" href="classCBlockIndex.html#a98490a2788c65cdd6ae9002b004dd74c">GetBlockHash</a>());</div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="comment">// Stop when we have added the genesis block.</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keywordflow">if</span> (pindex-><a class="code" href="classCBlockIndex.html#aebfc8d6b95852546760e742553d7bfd5">nHeight</a> == 0)</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="comment">// Exponentially larger steps back, plus the genesis block.</span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keywordtype">int</span> nHeight = std::max(pindex-><a class="code" href="classCBlockIndex.html#aebfc8d6b95852546760e742553d7bfd5">nHeight</a> - nStep, 0);</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="keywordflow">if</span> (Contains(pindex)) {</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="comment">// Use O(1) CChain index if possible.</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  pindex = (*this)[nHeight];</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="comment">// Otherwise, use O(log n) skiplist.</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  pindex = pindex-><a class="code" href="classCBlockIndex.html#ae1f702384690c6b8302e026a84172ef3">GetAncestor</a>(nHeight);</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  }</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keywordflow">if</span> (vHave.size() > 10)</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  nStep *= 2;</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  }</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> </div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordflow">return</span> <a class="code" href="structCBlockLocator.html">CBlockLocator</a>(vHave);</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> }</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> </div><div class="line"><a name="l00053"></a><span class="lineno"><a class="line" href="classCChain.html#adb9ec01329511e869bba95e3c143da71"> 53</a></span> <span class="keyword">const</span> <a class="code" href="classCBlockIndex.html">CBlockIndex</a> *<a class="code" href="classCChain.html#adb9ec01329511e869bba95e3c143da71">CChain::FindFork</a>(<span class="keyword">const</span> <a class="code" href="classCBlockIndex.html">CBlockIndex</a> *pindex)<span class="keyword"> const </span>{</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordflow">if</span> (pindex == NULL) {</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">return</span> NULL;</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  }</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keywordflow">if</span> (pindex-><a class="code" href="classCBlockIndex.html#aebfc8d6b95852546760e742553d7bfd5">nHeight</a> > Height())</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  pindex = pindex-><a class="code" href="classCBlockIndex.html#ae1f702384690c6b8302e026a84172ef3">GetAncestor</a>(Height());</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keywordflow">while</span> (pindex && !Contains(pindex))</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  pindex = pindex-><a class="code" href="classCBlockIndex.html#a1ef11137155df1dd5c81491630cece39">pprev</a>;</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordflow">return</span> pindex;</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> }</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> </div><div class="line"><a name="l00065"></a><span class="lineno"><a class="line" href="chain_8cpp.html#ae4573d0178546d3f9c518c39ae45fe69"> 65</a></span> <span class="keywordtype">int</span> <span class="keyword">static</span> <span class="keyword">inline</span> <a class="code" href="chain_8cpp.html#ae4573d0178546d3f9c518c39ae45fe69">InvertLowestOne</a>(<span class="keywordtype">int</span> <a class="code" href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">n</a>) { <span class="keywordflow">return</span> <a class="code" href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">n</a> & (<a class="code" href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">n</a> - 1); }</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> </div><div class="line"><a name="l00068"></a><span class="lineno"><a class="line" href="chain_8cpp.html#ad168714f025f6299a1c80626b6a5bb5a"> 68</a></span> <span class="keywordtype">int</span> <span class="keyword">static</span> <span class="keyword">inline</span> <a class="code" href="chain_8cpp.html#ad168714f025f6299a1c80626b6a5bb5a">GetSkipHeight</a>(<span class="keywordtype">int</span> height) {</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keywordflow">if</span> (height < 2)</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> </div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="comment">// Determine which height to jump back to. Any number strictly lower than height is acceptable,</span></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="comment">// but the following expression seems to perform well in simulations (max 110 steps to go back</span></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="comment">// up to 2**18 blocks).</span></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keywordflow">return</span> (height & 1) ? <a class="code" href="chain_8cpp.html#ae4573d0178546d3f9c518c39ae45fe69">InvertLowestOne</a>(<a class="code" href="chain_8cpp.html#ae4573d0178546d3f9c518c39ae45fe69">InvertLowestOne</a>(height - 1)) + 1 : <a class="code" href="chain_8cpp.html#ae4573d0178546d3f9c518c39ae45fe69">InvertLowestOne</a>(height);</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> }</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> </div><div class="line"><a name="l00078"></a><span class="lineno"><a class="line" href="classCBlockIndex.html#ae1f702384690c6b8302e026a84172ef3"> 78</a></span> <a class="code" href="classCBlockIndex.html">CBlockIndex</a>* <a class="code" href="classCBlockIndex.html#ae1f702384690c6b8302e026a84172ef3">CBlockIndex::GetAncestor</a>(<span class="keywordtype">int</span> height)</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> {</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keywordflow">if</span> (height > nHeight || height < 0)</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordflow">return</span> NULL;</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> </div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <a class="code" href="classCBlockIndex.html">CBlockIndex</a>* pindexWalk = <span class="keyword">this</span>;</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keywordtype">int</span> heightWalk = nHeight;</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordflow">while</span> (heightWalk > height) {</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keywordtype">int</span> heightSkip = <a class="code" href="chain_8cpp.html#ad168714f025f6299a1c80626b6a5bb5a">GetSkipHeight</a>(heightWalk);</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordtype">int</span> heightSkipPrev = <a class="code" href="chain_8cpp.html#ad168714f025f6299a1c80626b6a5bb5a">GetSkipHeight</a>(heightWalk - 1);</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordflow">if</span> (pindexWalk-><a class="code" href="classCBlockIndex.html#ab6242bb77bc01617f5b402d14e6a3883">pskip</a> != NULL &&</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  (heightSkip == height ||</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  (heightSkip > height && !(heightSkipPrev < heightSkip - 2 &&</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  heightSkipPrev >= height)))) {</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="comment">// Only follow pskip if pprev->pskip isn't better than pskip->pprev.</span></div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  pindexWalk = pindexWalk-><a class="code" href="classCBlockIndex.html#ab6242bb77bc01617f5b402d14e6a3883">pskip</a>;</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  heightWalk = heightSkip;</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  assert(pindexWalk-><a class="code" href="classCBlockIndex.html#a1ef11137155df1dd5c81491630cece39">pprev</a>);</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  pindexWalk = pindexWalk-><a class="code" href="classCBlockIndex.html#a1ef11137155df1dd5c81491630cece39">pprev</a>;</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  heightWalk--;</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  }</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  }</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordflow">return</span> pindexWalk;</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> }</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> </div><div class="line"><a name="l00104"></a><span class="lineno"><a class="line" href="classCBlockIndex.html#a7a58b33d64fde3df36c6e61371d031cc"> 104</a></span> <span class="keyword">const</span> <a class="code" href="classCBlockIndex.html">CBlockIndex</a>* <a class="code" href="classCBlockIndex.html#ae1f702384690c6b8302e026a84172ef3">CBlockIndex::GetAncestor</a>(<span class="keywordtype">int</span> height)<span class="keyword"> const</span></div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="keyword"></span>{</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keywordflow">return</span> <span class="keyword">const_cast<</span><a class="code" href="classCBlockIndex.html">CBlockIndex</a>*<span class="keyword">></span>(<span class="keyword">this</span>)->GetAncestor(height);</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span> }</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> </div><div class="line"><a name="l00109"></a><span class="lineno"><a class="line" href="classCBlockIndex.html#a21209a71e50daf10e283bd4049e46f64"> 109</a></span> <span class="keywordtype">void</span> <a class="code" href="classCBlockIndex.html#a21209a71e50daf10e283bd4049e46f64">CBlockIndex::BuildSkip</a>()</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> {</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keywordflow">if</span> (pprev)</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  pskip = pprev->GetAncestor(<a class="code" href="chain_8cpp.html#ad168714f025f6299a1c80626b6a5bb5a">GetSkipHeight</a>(nHeight));</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span> }</div><div class="ttc" id="classCChain_html_aeb563751f7362d4308c7c2cb35b834a5"><div class="ttname"><a href="classCChain.html#aeb563751f7362d4308c7c2cb35b834a5">CChain::SetTip</a></div><div class="ttdeci">void SetTip(CBlockIndex *pindex)</div><div class="ttdef"><b>Definition:</b> <a href="chain_8cpp_source.html#l00013">chain.cpp:13</a></div></div>
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<div class="ttc" id="structCBlockLocator_html"><div class="ttname"><a href="structCBlockLocator.html">CBlockLocator</a></div><div class="ttdef"><b>Definition:</b> <a href="block_8h_source.html#l00132">block.h:132</a></div></div>
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<div class="ttc" id="classCBlockIndex_html_ab6242bb77bc01617f5b402d14e6a3883"><div class="ttname"><a href="classCBlockIndex.html#ab6242bb77bc01617f5b402d14e6a3883">CBlockIndex::pskip</a></div><div class="ttdeci">CBlockIndex * pskip</div><div class="ttdoc">pointer to the index of some further predecessor of this block </div><div class="ttdef"><b>Definition:</b> <a href="chain_8h_source.html#l00110">chain.h:110</a></div></div>
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<div class="ttc" id="namespacestd_html"><div class="ttname"><a href="namespacestd.html">std</a></div></div>
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<div class="ttc" id="namespacefix-copyright-headers_html_aed10e06fbf20b2e50f73ff2d61f59e45"><div class="ttname"><a href="namespacefix-copyright-headers.html#aed10e06fbf20b2e50f73ff2d61f59e45">fix-copyright-headers.n</a></div><div class="ttdeci">int n</div><div class="ttdef"><b>Definition:</b> <a href="fix-copyright-headers_8py_source.html#l00046">fix-copyright-headers.py:46</a></div></div>
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<div class="ttc" id="classCChain_html_adb9ec01329511e869bba95e3c143da71"><div class="ttname"><a href="classCChain.html#adb9ec01329511e869bba95e3c143da71">CChain::FindFork</a></div><div class="ttdeci">const CBlockIndex * FindFork(const CBlockIndex *pindex) const</div><div class="ttdef"><b>Definition:</b> <a href="chain_8cpp_source.html#l00053">chain.cpp:53</a></div></div>
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<div class="ttc" id="chain_8h_html"><div class="ttname"><a href="chain_8h.html">chain.h</a></div></div>
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<div class="ttc" id="chain_8cpp_html_ae4573d0178546d3f9c518c39ae45fe69"><div class="ttname"><a href="chain_8cpp.html#ae4573d0178546d3f9c518c39ae45fe69">InvertLowestOne</a></div><div class="ttdeci">static int InvertLowestOne(int n)</div><div class="ttdef"><b>Definition:</b> <a href="chain_8cpp_source.html#l00065">chain.cpp:65</a></div></div>
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<div class="ttc" id="classCBlockIndex_html_ae1f702384690c6b8302e026a84172ef3"><div class="ttname"><a href="classCBlockIndex.html#ae1f702384690c6b8302e026a84172ef3">CBlockIndex::GetAncestor</a></div><div class="ttdeci">CBlockIndex * GetAncestor(int height)</div><div class="ttdoc">Efficiently find an ancestor of this block. </div><div class="ttdef"><b>Definition:</b> <a href="chain_8cpp_source.html#l00078">chain.cpp:78</a></div></div>
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<div class="ttc" id="classCBlockIndex_html_a98490a2788c65cdd6ae9002b004dd74c"><div class="ttname"><a href="classCBlockIndex.html#a98490a2788c65cdd6ae9002b004dd74c">CBlockIndex::GetBlockHash</a></div><div class="ttdeci">uint256 GetBlockHash() const</div><div class="ttdef"><b>Definition:</b> <a href="chain_8h_source.html#l00218">chain.h:218</a></div></div>
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<div class="ttc" id="classCBlockIndex_html"><div class="ttname"><a href="classCBlockIndex.html">CBlockIndex</a></div><div class="ttdef"><b>Definition:</b> <a href="chain_8h_source.html#l00100">chain.h:100</a></div></div>
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<div class="ttc" id="chain_8cpp_html_ad168714f025f6299a1c80626b6a5bb5a"><div class="ttname"><a href="chain_8cpp.html#ad168714f025f6299a1c80626b6a5bb5a">GetSkipHeight</a></div><div class="ttdeci">static int GetSkipHeight(int height)</div><div class="ttdef"><b>Definition:</b> <a href="chain_8cpp_source.html#l00068">chain.cpp:68</a></div></div>
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<div class="ttc" id="classCBlockIndex_html_a1ef11137155df1dd5c81491630cece39"><div class="ttname"><a href="classCBlockIndex.html#a1ef11137155df1dd5c81491630cece39">CBlockIndex::pprev</a></div><div class="ttdeci">CBlockIndex * pprev</div><div class="ttdoc">pointer to the index of the predecessor of this block </div><div class="ttdef"><b>Definition:</b> <a href="chain_8h_source.html#l00107">chain.h:107</a></div></div>
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<div class="ttc" id="classCChain_html_a03e98bebe804bfba219b4e6a2b858d9f"><div class="ttname"><a href="classCChain.html#a03e98bebe804bfba219b4e6a2b858d9f">CChain::GetLocator</a></div><div class="ttdeci">CBlockLocator GetLocator(const CBlockIndex *pindex=NULL) const</div><div class="ttdef"><b>Definition:</b> <a href="chain_8cpp_source.html#l00025">chain.cpp:25</a></div></div>
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<div class="ttc" id="classCBlockIndex_html_a21209a71e50daf10e283bd4049e46f64"><div class="ttname"><a href="classCBlockIndex.html#a21209a71e50daf10e283bd4049e46f64">CBlockIndex::BuildSkip</a></div><div class="ttdeci">void BuildSkip()</div><div class="ttdoc">Build the skiplist pointer for this entry. </div><div class="ttdef"><b>Definition:</b> <a href="chain_8cpp_source.html#l00109">chain.cpp:109</a></div></div>
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<div class="ttc" id="classCBlockIndex_html_aebfc8d6b95852546760e742553d7bfd5"><div class="ttname"><a href="classCBlockIndex.html#aebfc8d6b95852546760e742553d7bfd5">CBlockIndex::nHeight</a></div><div class="ttdeci">int nHeight</div><div class="ttdoc">height of the entry in the chain. The genesis block has height 0 </div><div class="ttdef"><b>Definition:</b> <a href="chain_8h_source.html#l00113">chain.h:113</a></div></div>
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