digraph wallet_program {
size="6.25";
rankdir=LR;
//ratio=fill;
splines=true;
fontname=Sans
ranksep=0.3;
penwidth=1.75;

overlap = false;

edge [ fontname=Sans, penwidth=1.75, style = "invis" ];
node [ fontname=Sans, shape = box, penwidth=1.75 ];

subgraph cluster_distributing {
    penwidth=0;

    distributing_priv [ label = "Create\nParent\nPrivate\nKey", style="invis" ];
    distributing_pub [ label = "Derive\nChild\nPublic\nKeys" ];
    distributing_distribute [ label = "Distribute\nPublic\nKeys" ];
    distributing_monitor [ label = "Monitor\nFor\nOutputs", style="invis" ];
    distributing_create [ label = "Create\nUnsigned\nTxes", style="invis" ];
    distributing_sign [ label = "Sign\nTxes", style="invis" ];
    distributing_broadcast [ label = "Broadcast\nTxes", style="invis" ];

    distributing_priv -> distributing_pub -> distributing_distribute -> distributing_monitor -> distributing_create -> distributing_sign -> distributing_broadcast;
    label = "Distributing-Only Wallet"
}

subgraph cluster_networked {
    penwidth=0;

    networked_priv [ label = "Create\nParent\nPrivate\nKey" ];
    networked_pub [ label = "Derive\nParent\nPublic\nKey" ];
    networked_distribute [ label = "Distribute\nPublic\nKeys", style="invis" ];
    networked_monitor [ label = "Monitor\nFor\nOutputs" ];
    networked_create [ label = "Create\nUnsigned\nTxes" ];
    networked_sign [ label = "Sign\nTxes" ];
    networked_broadcast [ label = "Broadcast\nTxes" ];

    networked_priv -> networked_pub -> networked_distribute -> networked_monitor -> networked_create -> networked_sign -> networked_broadcast;
    label = "       Other Wallet(s)"
}

networked_priv -> networked_pub [style=""];
networked_pub -> distributing_pub [ constraint = false, style = ""];
distributing_pub -> distributing_distribute -> networked_monitor -> networked_create -> networked_sign -> networked_broadcast [style=""];

}