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\draw (61.8,214.6) node [anchor=north west][inner sep=0.75pt] [align=left] {User};
\draw (267.9,207.5) node [anchor=north west][inner sep=0.75pt] [font=\scriptsize] [align=left] {Stake};
\draw (324.8,213.6) node [anchor=north west][inner sep=0.75pt] [align=left] {Validator};
\draw (425.73,205.67) node [anchor=north west][inner sep=0.75pt] [font=\scriptsize] [align=left] {VDF};
\draw (496.3,213.6) node [anchor=north west][inner sep=0.75pt] [align=left] {Leader};
\draw (152.83,336.83) node [anchor=north west][inner sep=0.75pt] [align=left] {Tx.};
\draw (254.1,149.64) node [anchor=north west][inner sep=0.75pt] [rotate=-328.01] {$\alpha ,\beta $};
\draw (133.19,258.08) node [anchor=north west][inner sep=0.75pt] [font=\scriptsize,rotate=-29.97] [align=left] {Delegate};
\draw (292.67,341) node [anchor=north west][inner sep=0.75pt] [align=left] {Mempool};
\draw (490.17,327.5) node [anchor=north west][inner sep=0.75pt] [align=left] {Tx.};
\draw (342,111) node [anchor=north west][inner sep=0.75pt] [align=left] {$\displaystyle \mathcal{D}_{A}$};
\draw (384.98,158.44) node [anchor=north west][inner sep=0.75pt] [rotate=-359.82] {$\alpha ,\beta $};
\draw (413.33,281.33) node [anchor=north west][inner sep=0.75pt] [align=left] {$\displaystyle \mathcal{B}$};
\draw (488.67,268.33) node [anchor=north west][inner sep=0.75pt] [align=left] {{\scriptsize Proposal}};
\draw (342,275.67) node [anchor=north west][inner sep=0.75pt] [align=left] {{\scriptsize Verify}};
\draw (459,143.07) node [anchor=north west][inner sep=0.75pt] {$\pi $};
\draw (320,156) node [anchor=north west][inner sep=0.75pt] [font=\normalsize] [align=left] {{\scriptsize $\displaystyle \pi $}};
\draw (422.4,230.33) node [anchor=north west][inner sep=0.75pt] [font=\scriptsize] [align=left] {in Turn};
\draw (117.8,66.6) node [anchor=north west][inner sep=0.75pt] [align=left] {Satellite};
\draw (61.65,148.12) node [anchor=north west][inner sep=0.75pt] [rotate=-307.92] [align=left] {Service};
\draw (192.18,93.11) node [anchor=north west][inner sep=0.75pt] [rotate=-59.61] [align=left] {Service};
\draw (421.44,59.24) node [anchor=north west][inner sep=0.75pt] [rotate=-16.97] [align=left] {VDF Election};
\draw (560,48) node [anchor=north west][inner sep=0.75pt] [align=left] {Space DAO};
\draw (341,33) node [anchor=north west][inner sep=0.75pt] [align=left] {Control};
\draw (187.13,216.6) node [anchor=north west][inner sep=0.75pt] [font=\footnotesize] [align=left] {Challenger};
\draw (259.62,279.83) node [anchor=north west][inner sep=0.75pt] [font=\scriptsize,rotate=-332.89] [align=left] {Delegate};
\draw (186.8,292.6) node [anchor=north west][inner sep=0.75pt] [font=\footnotesize] [align=left] {Delegator};
\draw (230.78,141.79) node [anchor=north west][inner sep=0.75pt] [font=\scriptsize,rotate=-323.8] [align=left] {Stake/Slash};
\end{tikzpicture}
\end{document}