diff --git a/.gitignore b/.gitignore
index 9b02af8..db5f852 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,3 +14,5 @@ Cargo.lock
 *.pdb
 doc/.$PRDPRDConfirm.drawio.bkp
 doc/.$PRDUpdate.drawio.bkp
+doc/.$PRDResponse.drawio.bkp
+doc/.$PRDUpdate.drawio.bkp
diff --git a/doc/.$PRDUpdate.drawio.bkp b/doc/.$PRDUpdate.drawio.bkp
index 4dae809..81db388 100644
--- a/doc/.$PRDUpdate.drawio.bkp
+++ b/doc/.$PRDUpdate.drawio.bkp
@@ -1,4 +1,4 @@
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diff --git a/doc/PRDResponse.drawio b/doc/PRDResponse.drawio
new file mode 100644
index 0000000..207ecf8
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+++ b/doc/PRDResponse.drawio
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diff --git a/doc/PRDResponse.png b/doc/PRDResponse.png
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Binary files /dev/null and b/doc/PRDResponse.png differ
diff --git a/doc/PRDUpdate.drawio b/doc/PRDUpdate.drawio
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@@ -40,6 +61,15 @@
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+            <mxPoint x="457" y="210" as="targetPoint" />
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@@ -49,6 +79,15 @@
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@@ -95,6 +134,15 @@
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+            <Array as="points">
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+            <mxPoint x="1165" y="237" as="targetPoint" />
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@@ -110,22 +158,30 @@
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+        <mxCell id="aM9ryv3xv72pqoxQDRHE-7" value="button" style="html=1;verticalAlign=bottom;endArrow=block;edgeStyle=elbowEdgeStyle;elbow=vertical;curved=0;rounded=0;fontColor=#000000;" parent="1" source="aM9ryv3xv72pqoxQDRHE-2" target="aM9ryv3xv72pqoxQDRHE-6" edge="1">
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+            <mxPoint x="275" y="145" as="sourcePoint" />
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+              <mxPoint x="360" y="145" />
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+            <mxPoint x="445" y="145" as="targetPoint" />
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@@ -260,6 +316,12 @@
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+        <mxCell id="MqokN8DVP6Cu9g1BAX3J-193" value="" style="strokeWidth=2;html=1;shape=mxgraph.flowchart.annotation_1;align=left;pointerEvents=1;fontColor=#000000;" parent="1" vertex="1">
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+        <mxCell id="MqokN8DVP6Cu9g1BAX3J-194" value="RequestPrdUpdate" style="text;html=1;align=center;verticalAlign=middle;whiteSpace=wrap;rounded=0;strokeWidth=3;fontColor=#000000;fontStyle=1" parent="1" vertex="1">
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@@ -270,6 +332,64 @@
             <mxPoint as="offset" />
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         </mxCell>
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+            <mxPoint x="986" y="238" as="targetPoint" />
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+        <mxCell id="MqokN8DVP6Cu9g1BAX3J-207" value="TxSp" style="html=1;verticalAlign=bottom;endArrow=none;edgeStyle=elbowEdgeStyle;elbow=horizontal;curved=0;rounded=0;startArrow=classic;startFill=1;endFill=0;fillColor=#dae8fc;strokeColor=#6c8ebf;fontColor=#000000;" parent="1" edge="1">
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@@ -277,12 +397,51 @@
             <mxPoint as="offset" />
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+        <mxCell id="MqokN8DVP6Cu9g1BAX3J-215" value="Message" style="html=1;verticalAlign=bottom;endArrow=block;edgeStyle=elbowEdgeStyle;elbow=vertical;curved=0;rounded=0;fillColor=#dae8fc;strokeColor=#6c8ebf;strokeWidth=3;fontColor=#000000;" parent="1" edge="1">
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+        <mxCell id="MqokN8DVP6Cu9g1BAX3J-216" value="TxSp" style="html=1;verticalAlign=bottom;endArrow=block;edgeStyle=elbowEdgeStyle;elbow=vertical;curved=0;rounded=0;strokeWidth=1;fillColor=#dae8fc;strokeColor=#6c8ebf;fontColor=#000000;" parent="1" edge="1">
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+        <mxCell id="MqokN8DVP6Cu9g1BAX3J-223" value="TxFaucet" style="html=1;verticalAlign=bottom;endArrow=none;edgeStyle=elbowEdgeStyle;elbow=horizontal;curved=0;rounded=0;startArrow=classic;startFill=1;endFill=0;fillColor=#dae8fc;strokeColor=#6c8ebf;strokeWidth=3;fontColor=#000000;" parent="1" edge="1">
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+        <mxCell id="MqokN8DVP6Cu9g1BAX3J-224" value="TxFaucet" style="html=1;verticalAlign=bottom;endArrow=none;edgeStyle=elbowEdgeStyle;elbow=horizontal;curved=0;rounded=0;startArrow=classic;startFill=1;endFill=0;fillColor=#dae8fc;strokeColor=#6c8ebf;strokeWidth=3;fontColor=#000000;" parent="1" edge="1">
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@@ -322,6 +481,24 @@
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+        <mxCell id="MqokN8DVP6Cu9g1BAX3J-294" value="TxFaucet" style="html=1;verticalAlign=bottom;endArrow=none;edgeStyle=elbowEdgeStyle;elbow=vertical;curved=0;rounded=0;startArrow=classic;startFill=1;endFill=0;fillColor=#d5e8d4;strokeColor=#82b366;strokeWidth=3;fontColor=#000000;" parent="MqokN8DVP6Cu9g1BAX3J-219" edge="1">
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+        <mxCell id="MqokN8DVP6Cu9g1BAX3J-295" value="Message" style="html=1;verticalAlign=bottom;endArrow=none;edgeStyle=elbowEdgeStyle;elbow=vertical;curved=0;rounded=0;startArrow=classic;startFill=1;endFill=0;fillColor=#d5e8d4;strokeColor=#82b366;strokeWidth=3;fontColor=#000000;" parent="MqokN8DVP6Cu9g1BAX3J-219" edge="1">
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@@ -349,6 +526,24 @@
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+        <mxCell id="MqokN8DVP6Cu9g1BAX3J-252" value="TxFaucet" style="html=1;verticalAlign=bottom;endArrow=none;edgeStyle=elbowEdgeStyle;elbow=horizontal;curved=0;rounded=0;startArrow=classic;startFill=1;endFill=0;fillColor=#dae8fc;strokeColor=#6c8ebf;fontColor=#000000;" parent="1" edge="1">
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@@ -422,8 +617,8 @@
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