\begin{sequencediagram} \newthread{actor}{Actor}{} \newinst[4]{concordia}{:Concordia}{} \newinst[1]{eth}{:Ethereum}{} \newinst[1]{orbit}{:OrbitDb}{} \begin{call}{actor}{Delete local data}{concordia}{Delete confirmation form} \end{call} \begin{call}{actor}{Submit}{concordia}{} \begin{call}{concordia}{Delete local DBs}{orbit}{} \end{call} \end{call} \end{sequencediagram}