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Dev Docs: Add Section About Headers-First IBD

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* Add flowchart illustration to blocks-first section to match new
  headers-first flowchart

* Add new headers-first initial block download (IBD) section

* Revise Block Broadcasting section

* Add paragraph about orphan block handling in headers-first to the
  Orphan Blocks section
This commit is contained in:
David A. Harding 2015-02-05 15:44:05 -05:00
parent 7dcf67d5a8
commit 72cc5f7f9e
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GPG key ID: 4B29C30FF29EC4B7
18 changed files with 772 additions and 4 deletions
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img/dev/en-headers-first-flowchart.dot Normal file
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digraph {
// This file is licensed under the MIT License (MIT) available on
// http://opensource.org/licenses/MIT.
size=6.25;
rankdir=TB
splines = "true";
ranksep = 0.2;
nodesep = 0.9;
edge [ penwidth = 1.75, fontname="Sans" ]
node [ penwidth = 1.75, shape = "none", fontname="Sans"]
graph [ penwidth = 1.75, fontname="Sans" ]
fsbc [ label = "Fully-Synced Block Chain?", style = "filled" ];
fshc [ label = "Fully-Synced Header Chain?", style = "filled" ];
more_headers_than_blocks [ label = "More Headers Than Blocks?", style = "filled" ];
listen_for_new_blocks [ label = "Listen For New Blocks (Inv)" ];
request_blocks [ label = "Request Blocks (GetData)" ];
request_headers [ label = "Request Headers (GetHeaders)" ];
fsbc -> fshc [ label = " No" ];
fshc -> more_headers_than_blocks [ label = "No" ];
fshc -> request_headers [ label = " No" ];
fsbc -> listen_for_new_blocks [ label = "Yes", constraint=false ];
fshc -> request_blocks [ label = "Yes", constraint=false ];
request_blocks -> more_headers_than_blocks [ dir=back, label = " Yes" ];
//request_headers -> fshc [ style = "dotted", constraint = false ];
//request_blocks -> fsbc [ style = "dotted", constraint = false ];
label = "\ \nOverview Of Headers-First Initial Blocks Download (IBD)"
}