diff --git a/img/dev/en-p2p-control-messages.dot b/img/dev/en-p2p-control-messages.dot
index ddb35231..2c9e41c1 100644
--- a/img/dev/en-p2p-control-messages.dot
+++ b/img/dev/en-p2p-control-messages.dot
@@ -22,6 +22,8 @@ sendheaders;
 ERROR [ style = "invis" ];
 ERROR -> reject [ style = "invis" ];
 
+sendcmpct;
+
 label = " \nOverview Of P2P Protocol Control And Advisory Messages"
 
 }
diff --git a/img/dev/en-p2p-control-messages.png b/img/dev/en-p2p-control-messages.png
index f9b69d2c..8443f697 100644
Binary files a/img/dev/en-p2p-control-messages.png and b/img/dev/en-p2p-control-messages.png differ
diff --git a/img/dev/en-p2p-control-messages.svg b/img/dev/en-p2p-control-messages.svg
index eab70122..d603fbac 100644
--- a/img/dev/en-p2p-control-messages.svg
+++ b/img/dev/en-p2p-control-messages.svg
@@ -4,94 +4,99 @@
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+ viewBox="0.00 0.00 450.00 86.07" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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-<text text-anchor="middle" x="321.75" y="-7.8" font-family="Sans" font-size="14.00">Overview Of P2P Protocol Control And Advisory Messages</text>
+<polygon fill="white" stroke="none" points="-4,4 -4,-136 728,-136 728,4 -4,4"/>
+<text text-anchor="middle" x="362" y="-22.8" font-family="Sans" font-size="14.00"> </text>
+<text text-anchor="middle" x="362" y="-7.8" font-family="Sans" font-size="14.00">Overview Of P2P Protocol Control And Advisory Messages</text>
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-<text text-anchor="middle" x="35.5" y="-110.3" font-family="Sans" font-size="14.00">version</text>
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+<text text-anchor="middle" x="33.5" y="-110.3" font-family="Sans" font-size="14.00">version</text>
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-<polygon fill="none" stroke="black" stroke-width="1.75" points="68,-74 3,-74 3,-38 68,-38 68,-74"/>
-<text text-anchor="middle" x="35.5" y="-52.3" font-family="Sans" font-size="14.00">verack</text>
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+<text text-anchor="middle" x="33.5" y="-52.3" font-family="Sans" font-size="14.00">verack</text>
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 <g id="edge1" class="edge"><title>version&#45;&gt;verack</title>
-<path fill="none" stroke="black" stroke-width="1.75" d="M35.5,-95.8939C35.5,-88.9462 35.5,-80.9383 35.5,-74.0014"/>
+<path fill="none" stroke="black" stroke-width="1.75" d="M33.5,-95.8939C33.5,-88.9462 33.5,-80.9383 33.5,-74.0014"/>
 </g>
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 <g id="node3" class="node"><title>ping</title>
-<polygon fill="none" stroke="black" stroke-width="1.75" points="139.5,-132 85.5,-132 85.5,-96 139.5,-96 139.5,-132"/>
-<text text-anchor="middle" x="112.5" y="-110.3" font-family="Sans" font-size="14.00">ping</text>
+<polygon fill="none" stroke="black" stroke-width="1.75" points="135.5,-132 81.5,-132 81.5,-96 135.5,-96 135.5,-132"/>
+<text text-anchor="middle" x="108.5" y="-110.3" font-family="Sans" font-size="14.00">ping</text>
 </g>
 <!-- pong -->
 <g id="node4" class="node"><title>pong</title>
-<polygon fill="none" stroke="black" stroke-width="1.75" points="139.5,-74 85.5,-74 85.5,-38 139.5,-38 139.5,-74"/>
-<text text-anchor="middle" x="112.5" y="-52.3" font-family="Sans" font-size="14.00">pong</text>
+<polygon fill="none" stroke="black" stroke-width="1.75" points="135.5,-74 81.5,-74 81.5,-38 135.5,-38 135.5,-74"/>
+<text text-anchor="middle" x="108.5" y="-52.3" font-family="Sans" font-size="14.00">pong</text>
 </g>
 <!-- ping&#45;&gt;pong -->
 <g id="edge2" class="edge"><title>ping&#45;&gt;pong</title>
-<path fill="none" stroke="black" stroke-width="1.75" d="M112.5,-95.8939C112.5,-88.9462 112.5,-80.9383 112.5,-74.0014"/>
+<path fill="none" stroke="black" stroke-width="1.75" d="M108.5,-95.8939C108.5,-88.9462 108.5,-80.9383 108.5,-74.0014"/>
 </g>
 <!-- getaddr -->
 <g id="node5" class="node"><title>getaddr</title>
-<polygon fill="none" stroke="black" stroke-width="1.75" points="227.5,-132 153.5,-132 153.5,-96 227.5,-96 227.5,-132"/>
-<text text-anchor="middle" x="190.5" y="-110.3" font-family="Sans" font-size="14.00">getaddr</text>
+<polygon fill="none" stroke="black" stroke-width="1.75" points="219.5,-132 149.5,-132 149.5,-96 219.5,-96 219.5,-132"/>
+<text text-anchor="middle" x="184.5" y="-110.3" font-family="Sans" font-size="14.00">getaddr</text>
 </g>
 <!-- addr -->
 <g id="node6" class="node"><title>addr</title>
-<polygon fill="none" stroke="black" stroke-width="1.75" points="217.5,-74 163.5,-74 163.5,-38 217.5,-38 217.5,-74"/>
-<text text-anchor="middle" x="190.5" y="-52.3" font-family="Sans" font-size="14.00">addr</text>
+<polygon fill="none" stroke="black" stroke-width="1.75" points="211.5,-74 157.5,-74 157.5,-38 211.5,-38 211.5,-74"/>
+<text text-anchor="middle" x="184.5" y="-52.3" font-family="Sans" font-size="14.00">addr</text>
 </g>
 <!-- getaddr&#45;&gt;addr -->
 <g id="edge3" class="edge"><title>getaddr&#45;&gt;addr</title>
-<path fill="none" stroke="black" stroke-width="1.75" d="M190.5,-95.8939C190.5,-88.9462 190.5,-80.9383 190.5,-74.0014"/>
+<path fill="none" stroke="black" stroke-width="1.75" d="M184.5,-95.8939C184.5,-88.9462 184.5,-80.9383 184.5,-74.0014"/>
 </g>
 <!-- filterload -->
 <g id="node7" class="node"><title>filterload</title>
-<polygon fill="none" stroke="black" stroke-width="1.75" points="371,-132 288,-132 288,-96 371,-96 371,-132"/>
-<text text-anchor="middle" x="329.5" y="-110.3" font-family="Sans" font-size="14.00">filterload</text>
+<polygon fill="none" stroke="black" stroke-width="1.75" points="354,-132 277,-132 277,-96 354,-96 354,-132"/>
+<text text-anchor="middle" x="315.5" y="-110.3" font-family="Sans" font-size="14.00">filterload</text>
 </g>
 <!-- filteradd -->
 <g id="node8" class="node"><title>filteradd</title>
-<polygon fill="none" stroke="black" stroke-width="1.75" points="317,-74 238,-74 238,-38 317,-38 317,-74"/>
-<text text-anchor="middle" x="277.5" y="-52.3" font-family="Sans" font-size="14.00">filteradd</text>
+<polygon fill="none" stroke="black" stroke-width="1.75" points="304.5,-74 230.5,-74 230.5,-38 304.5,-38 304.5,-74"/>
+<text text-anchor="middle" x="267.5" y="-52.3" font-family="Sans" font-size="14.00">filteradd</text>
 </g>
 <!-- filterload&#45;&gt;filteradd -->
 <g id="edge4" class="edge"><title>filterload&#45;&gt;filteradd</title>
-<path fill="none" stroke="black" stroke-width="1.75" d="M313.616,-95.8939C307.164,-88.9462 299.728,-80.9383 293.287,-74.0014"/>
+<path fill="none" stroke="black" stroke-width="1.75" d="M300.838,-95.8939C294.882,-88.9462 288.019,-80.9383 282.073,-74.0014"/>
 </g>
 <!-- filterclear -->
 <g id="node9" class="node"><title>filterclear</title>
-<polygon fill="none" stroke="black" stroke-width="1.75" points="420,-74 331,-74 331,-38 420,-38 420,-74"/>
-<text text-anchor="middle" x="375.5" y="-52.3" font-family="Sans" font-size="14.00">filterclear</text>
+<polygon fill="none" stroke="black" stroke-width="1.75" points="400.5,-74 318.5,-74 318.5,-38 400.5,-38 400.5,-74"/>
+<text text-anchor="middle" x="359.5" y="-52.3" font-family="Sans" font-size="14.00">filterclear</text>
 </g>
 <!-- filterload&#45;&gt;filterclear -->
 <g id="edge5" class="edge"><title>filterload&#45;&gt;filterclear</title>
-<path fill="none" stroke="black" stroke-width="1.75" d="M343.551,-95.8939C349.258,-88.9462 355.836,-80.9383 361.535,-74.0014"/>
+<path fill="none" stroke="black" stroke-width="1.75" d="M328.941,-95.8939C334.399,-88.9462 340.691,-80.9383 346.142,-74.0014"/>
 </g>
 <!-- alert -->
 <g id="node10" class="node"><title>alert</title>
-<polygon fill="none" stroke="black" stroke-width="1.75" points="439.5,-132 385.5,-132 385.5,-96 439.5,-96 439.5,-132"/>
-<text text-anchor="middle" x="412.5" y="-110.3" font-family="Sans" font-size="14.00">alert</text>
+<polygon fill="none" stroke="black" stroke-width="1.75" points="422.5,-132 368.5,-132 368.5,-96 422.5,-96 422.5,-132"/>
+<text text-anchor="middle" x="395.5" y="-110.3" font-family="Sans" font-size="14.00">alert</text>
 </g>
 <!-- sendheaders -->
 <g id="node11" class="node"><title>sendheaders</title>
-<polygon fill="none" stroke="black" stroke-width="1.75" points="563.5,-132 453.5,-132 453.5,-96 563.5,-96 563.5,-132"/>
-<text text-anchor="middle" x="508.5" y="-110.3" font-family="Sans" font-size="14.00">sendheaders</text>
+<polygon fill="none" stroke="black" stroke-width="1.75" points="540.5,-132 436.5,-132 436.5,-96 540.5,-96 540.5,-132"/>
+<text text-anchor="middle" x="488.5" y="-110.3" font-family="Sans" font-size="14.00">sendheaders</text>
 </g>
 <!-- ERROR -->
 <!-- reject -->
 <g id="node13" class="node"><title>reject</title>
-<polygon fill="none" stroke="black" stroke-width="1.75" points="640,-74 581,-74 581,-38 640,-38 640,-74"/>
-<text text-anchor="middle" x="610.5" y="-52.3" font-family="Sans" font-size="14.00">reject</text>
+<polygon fill="none" stroke="black" stroke-width="1.75" points="615.5,-74 559.5,-74 559.5,-38 615.5,-38 615.5,-74"/>
+<text text-anchor="middle" x="587.5" y="-52.3" font-family="Sans" font-size="14.00">reject</text>
 </g>
 <!-- ERROR&#45;&gt;reject -->
+<!-- sendcmpct -->
+<g id="node14" class="node"><title>sendcmpct</title>
+<polygon fill="none" stroke="black" stroke-width="1.75" points="724,-132 635,-132 635,-96 724,-96 724,-132"/>
+<text text-anchor="middle" x="679.5" y="-110.3" font-family="Sans" font-size="14.00">sendcmpct</text>
+</g>
 </g>
 </svg>
diff --git a/img/dev/en-p2p-data-messages.dot b/img/dev/en-p2p-data-messages.dot
index 7f9fd575..2e47a418 100644
--- a/img/dev/en-p2p-data-messages.dot
+++ b/img/dev/en-p2p-data-messages.dot
@@ -10,6 +10,8 @@ edge [ penwidth = 1.75, fontname="Sans", dir="none" ]
 node [ penwidth = 1.75, shape = "box", fontname="Sans", ]
 graph [ penwidth = 1.75, fontname="Sans" ]
 
+getblocktxn -> blocktxn [ minlen = 3 ];
+
 getblocks -> inv;
 mempool -> inv;
 
diff --git a/img/dev/en-p2p-data-messages.png b/img/dev/en-p2p-data-messages.png
index 7b54c695..39ada934 100644
Binary files a/img/dev/en-p2p-data-messages.png and b/img/dev/en-p2p-data-messages.png differ
diff --git a/img/dev/en-p2p-data-messages.svg b/img/dev/en-p2p-data-messages.svg
index d7ce75f6..73699941 100644
--- a/img/dev/en-p2p-data-messages.svg
+++ b/img/dev/en-p2p-data-messages.svg
@@ -1,117 +1,131 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
  "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
-<!-- Generated by graphviz version 2.26.3 (20100126.1600)
+<!-- Generated by graphviz version 2.38.0 (20140413.2041)
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-<!-- Title: _anonymous_0 Pages: 1 -->
-<svg width="450pt" height="208pt"
- viewBox="0.00 0.00 450.00 207.63" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
-<g id="graph1" class="graph" transform="scale(0.755034 0.755034) rotate(0) translate(4 271)">
-<title>_anonymous_0</title>
-<polygon fill="white" stroke="white" points="-4,5 -4,-271 593,-271 593,5 -4,5"/>
-<text text-anchor="middle" x="294" y="-8.4" font-family="Sans" font-size="14.00">Overview Of P2P Protocol Data Request And Reply Messages</text>
+<!-- Title: %3 Pages: 1 -->
+<svg width="450pt" height="234pt"
+ viewBox="0.00 0.00 450.00 234.49" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+<g id="graph0" class="graph" transform="scale(0.758853 0.758853) rotate(0) translate(4 305)">
+<title>%3</title>
+<polygon fill="white" stroke="none" points="-4,4 -4,-305 589,-305 589,4 -4,4"/>
+<text text-anchor="middle" x="292.5" y="-7.8" font-family="Sans" font-size="14.00">Overview Of P2P Protocol Data Request And Reply Messages</text>
+<!-- getblocktxn -->
+<g id="node1" class="node"><title>getblocktxn</title>
+<polygon fill="none" stroke="black" stroke-width="1.75" points="124,-59 26,-59 26,-23 124,-23 124,-59"/>
+<text text-anchor="middle" x="75" y="-37.3" font-family="Sans" font-size="14.00">getblocktxn</text>
+</g>
+<!-- blocktxn -->
+<g id="node2" class="node"><title>blocktxn</title>
+<polygon fill="none" stroke="black" stroke-width="1.75" points="559,-59 484,-59 484,-23 559,-23 559,-59"/>
+<text text-anchor="middle" x="521.5" y="-37.3" font-family="Sans" font-size="14.00">blocktxn</text>
+</g>
+<!-- getblocktxn&#45;&gt;blocktxn -->
+<g id="edge1" class="edge"><title>getblocktxn&#45;&gt;blocktxn</title>
+<path fill="none" stroke="black" stroke-width="1.75" d="M124.061,-41C213.997,-41 403.414,-41 483.967,-41"/>
+</g>
 <!-- getblocks -->
-<g id="node1" class="node"><title>getblocks</title>
-<polygon fill="none" stroke="black" stroke-width="1.75" points="116,-141 36,-141 36,-105 116,-105 116,-141"/>
-<text text-anchor="middle" x="76" y="-118.9" font-family="Sans" font-size="14.00">getblocks</text>
+<g id="node3" class="node"><title>getblocks</title>
+<polygon fill="none" stroke="black" stroke-width="1.75" points="115.5,-179 34.5,-179 34.5,-143 115.5,-143 115.5,-179"/>
+<text text-anchor="middle" x="75" y="-157.3" font-family="Sans" font-size="14.00">getblocks</text>
 </g>
 <!-- inv -->
-<g id="node3" class="node"><title>inv</title>
-<polygon fill="none" stroke="black" stroke-width="1.75" points="233,-121 179,-121 179,-85 233,-85 233,-121"/>
-<text text-anchor="middle" x="206" y="-98.9" font-family="Sans" font-size="14.00">inv</text>
+<g id="node4" class="node"><title>inv</title>
+<polygon fill="none" stroke="black" stroke-width="1.75" points="231,-159 177,-159 177,-123 231,-123 231,-159"/>
+<text text-anchor="middle" x="204" y="-137.3" font-family="Sans" font-size="14.00">inv</text>
 </g>
 <!-- getblocks&#45;&gt;inv -->
 <g id="edge2" class="edge"><title>getblocks&#45;&gt;inv</title>
-<path fill="none" stroke="black" stroke-width="1.75" d="M116.776,-116.727C137.03,-113.611 160.945,-109.931 178.916,-107.167"/>
+<path fill="none" stroke="black" stroke-width="1.75" d="M115.835,-154.727C135.767,-151.588 159.329,-147.877 176.927,-145.106"/>
 </g>
 <!-- getdata -->
-<g id="node7" class="node"><title>getdata</title>
-<polygon fill="none" stroke="black" stroke-width="1.75" points="391,-121 321,-121 321,-85 391,-85 391,-121"/>
-<text text-anchor="middle" x="356" y="-98.9" font-family="Sans" font-size="14.00">getdata</text>
+<g id="node6" class="node"><title>getdata</title>
+<polygon fill="none" stroke="black" stroke-width="1.75" points="389,-159 319,-159 319,-123 389,-123 389,-159"/>
+<text text-anchor="middle" x="354" y="-137.3" font-family="Sans" font-size="14.00">getdata</text>
 </g>
 <!-- inv&#45;&gt;getdata -->
-<g id="edge6" class="edge"><title>inv&#45;&gt;getdata</title>
-<path fill="none" stroke="black" stroke-width="1.75" d="M233.164,-103C257.732,-103 294.053,-103 320.831,-103"/>
+<g id="edge4" class="edge"><title>inv&#45;&gt;getdata</title>
+<path fill="none" stroke="black" stroke-width="1.75" d="M231.119,-141C255.516,-141 292.082,-141 318.797,-141"/>
 </g>
 <!-- mempool -->
-<g id="node4" class="node"><title>mempool</title>
-<polygon fill="none" stroke="black" stroke-width="1.75" points="115,-101 37,-101 37,-65 115,-65 115,-101"/>
-<text text-anchor="middle" x="76" y="-78.9" font-family="Sans" font-size="14.00">mempool</text>
+<g id="node5" class="node"><title>mempool</title>
+<polygon fill="none" stroke="black" stroke-width="1.75" points="114.5,-139 35.5,-139 35.5,-103 114.5,-103 114.5,-139"/>
+<text text-anchor="middle" x="75" y="-117.3" font-family="Sans" font-size="14.00">mempool</text>
 </g>
 <!-- mempool&#45;&gt;inv -->
-<g id="edge4" class="edge"><title>mempool&#45;&gt;inv</title>
-<path fill="none" stroke="black" stroke-width="1.75" d="M115.711,-89.1093C136.17,-92.2569 160.59,-96.0138 178.871,-98.8264"/>
+<g id="edge3" class="edge"><title>mempool&#45;&gt;inv</title>
+<path fill="none" stroke="black" stroke-width="1.75" d="M114.794,-127.109C134.927,-130.28 158.986,-134.069 176.888,-136.888"/>
 </g>
 <!-- tx -->
-<g id="node9" class="node"><title>tx</title>
-<polygon fill="none" stroke="black" stroke-width="1.75" points="551,-181 497,-181 497,-145 551,-145 551,-181"/>
-<text text-anchor="middle" x="524" y="-158.9" font-family="Sans" font-size="14.00">tx</text>
+<g id="node7" class="node"><title>tx</title>
+<polygon fill="none" stroke="black" stroke-width="1.75" points="548.5,-219 494.5,-219 494.5,-183 548.5,-183 548.5,-219"/>
+<text text-anchor="middle" x="521.5" y="-197.3" font-family="Sans" font-size="14.00">tx</text>
 </g>
 <!-- getdata&#45;&gt;tx -->
-<g id="edge8" class="edge"><title>getdata&#45;&gt;tx</title>
-<path fill="none" stroke="black" stroke-width="1.75" d="M391.218,-115.578C422.681,-126.815 468.117,-143.042 496.844,-153.301"/>
+<g id="edge5" class="edge"><title>getdata&#45;&gt;tx</title>
+<path fill="none" stroke="black" stroke-width="1.75" d="M389.292,-153.432C420.536,-164.759 466.011,-181.246 494.393,-191.535"/>
 </g>
 <!-- block -->
-<g id="node11" class="node"><title>block</title>
-<polygon fill="none" stroke="black" stroke-width="1.75" points="551,-141 497,-141 497,-105 551,-105 551,-141"/>
-<text text-anchor="middle" x="524" y="-118.9" font-family="Sans" font-size="14.00">block</text>
+<g id="node8" class="node"><title>block</title>
+<polygon fill="none" stroke="black" stroke-width="1.75" points="548.5,-179 494.5,-179 494.5,-143 548.5,-143 548.5,-179"/>
+<text text-anchor="middle" x="521.5" y="-157.3" font-family="Sans" font-size="14.00">block</text>
 </g>
 <!-- getdata&#45;&gt;block -->
-<g id="edge10" class="edge"><title>getdata&#45;&gt;block</title>
-<path fill="none" stroke="black" stroke-width="1.75" d="M391.218,-107.193C422.681,-110.938 468.117,-116.347 496.844,-119.767"/>
+<g id="edge6" class="edge"><title>getdata&#45;&gt;block</title>
+<path fill="none" stroke="black" stroke-width="1.75" d="M389.292,-145.144C420.536,-148.92 466.011,-154.415 494.393,-157.845"/>
 </g>
 <!-- merkleblock -->
-<g id="node13" class="node"><title>merkleblock</title>
-<polygon fill="none" stroke="black" stroke-width="1.75" points="573,-101 475,-101 475,-65 573,-65 573,-101"/>
-<text text-anchor="middle" x="524" y="-78.9" font-family="Sans" font-size="14.00">merkleblock</text>
+<g id="node9" class="node"><title>merkleblock</title>
+<polygon fill="none" stroke="black" stroke-width="1.75" points="571,-139 472,-139 472,-103 571,-103 571,-139"/>
+<text text-anchor="middle" x="521.5" y="-117.3" font-family="Sans" font-size="14.00">merkleblock</text>
 </g>
 <!-- getdata&#45;&gt;merkleblock -->
-<g id="edge12" class="edge"><title>getdata&#45;&gt;merkleblock</title>
-<path fill="none" stroke="black" stroke-width="1.75" d="M391.218,-98.8073C415.369,-95.9323 447.752,-92.0772 474.492,-88.8939"/>
+<g id="edge7" class="edge"><title>getdata&#45;&gt;merkleblock</title>
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+<g id="edge8" class="edge"><title>getdata&#45;&gt;notfound</title>
+<path fill="none" stroke="black" stroke-width="1.75" d="M389.292,-128.568C416.275,-118.785 453.873,-105.155 481.908,-94.991"/>
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+<g id="node16" class="node"><title>label4</title>
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+<text text-anchor="middle" x="521.5" y="-270.8" font-family="Sans" font-size="14.00">Requested Data</text>
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