49 lines
1.8 KiB
TeX
49 lines
1.8 KiB
TeX
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\section{Shutdown}
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\begin{figure}[h!]
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\begin{sequencediagram}
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\newinst{wallet}{\shortstack{Customer wallet \\
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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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\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]{bank}{\shortstack{Customer bank \\
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\\ \begin{tikzpicture}
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\node [fill=gray!20,draw=black,thick,align=center] {Checking \\ Accounts};
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\end{tikzpicture}
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}}
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\postlevel
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\begin{callself}{exchange}{Operator initiates shutdown}{}
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\end{callself}
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\mess[0]{exchange}{{Shutdown alert}}{wallet}
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\begin{sdblock}{Bank account known?}{}
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\begin{callself}{wallet}{Designate bank account}{}
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\end{callself}
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\end{sdblock}
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\mess[0]{wallet}{{Deposit (Coins)}}{exchange}
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\begin{sdblock}{Acceptable account?}{}
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\mess[0]{exchange}{{Refuse deposit}}{wallet}
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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}{{Initiate transfer}}{bank}
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\end{sequencediagram}
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\caption{Shutdown interactions between customer, Taler exchange (payment
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service provider) and bank.}
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\label{fig:int:shutdown}
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\end{figure}
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KYC/AML requirements are relaxed in cases where the customer is able to
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cryptographically demonstrate that they previously withdrew these coins from
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the designated checking account. Thus, KYC/AML checks here primarily still
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apply if the customer received the funds via P2P transfers from other wallets.
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