48 lines
1.6 KiB
TeX
48 lines
1.6 KiB
TeX
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\section{Push payment}
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\begin{figure}[h!]
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\begin{sequencediagram}
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\newinst{payer}{\shortstack{Payer \\
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\\ \begin{tikzpicture}
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\node [fill=gray!20,draw=black,thick,align=center] {Pre-funded \\ Wallet};
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\end{tikzpicture}
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}}
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\newinst[2]{exchange}{\shortstack{Taler (exchange) \\
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\\ \begin{tikzpicture}[shape aspect=.5]
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\tikzset{every node/.style={cylinder,shape border rotate=90, draw,fill=gray!25}}
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\node at (1.5,0) {\shortstack{{{\tiny Database}}}};
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\end{tikzpicture}
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}}
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\newinst[2]{payee}{\shortstack{Payee \\
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\\ \begin{tikzpicture}
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\node [fill=gray!20,draw=black,thick,align=center] { Unique \\ Wallet ID};
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\end{tikzpicture}
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}}
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\postlevel
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\begin{callself}{payer}{Review push payment fees}{}
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\end{callself}
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\mess[0]{payer}{{Push funds (Coins)}}{exchange}
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\mess[0]{payer}{{Offer payment (e.g. via QR code)}}{payee}
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\begin{callself}{payee}{Review payment offer}{}
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\end{callself}
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\mess[0]{payee}{{Request funds (Wallet ID)}}{exchange}
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\begin{sdblock}{Domestic wallet?}{}
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\begin{callself}{exchange}{Figure~\ref{fig:proc:domestic}}{}
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\end{callself}
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\end{sdblock}
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\begin{sdblock}{KYC/AML required?}{}
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\begin{callself}{exchange}{Figures~\ref{fig:proc:kyc}, \ref{fig:proc:aml}}{}
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\end{callself}
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\end{sdblock}
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\mess[0]{exchange}{{Distribute digital cash}}{payee}
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% \postlevel
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\begin{sdblock}{Payment offer expired?}{}
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\mess[0]{exchange}{{Return funds}}{payer}
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\end{sdblock}
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\end{sequencediagram}
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\caption{Interactions between wallets and Taler exchange
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in a push payment.}
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\label{fig:int:push}
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\end{figure}
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