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)"
}