-reg text work

doc/flows/int-deposit.tex

@@ -1,6 +1,7 @@
-\section{Deposit}
+\section{Deposit} \label{sec:deposit}
-
 
+% FIXME: split up between deposit to merchant
+% and deposit to customer's (own) bank account!
 
 \begin{figure}[h!]
   \begin{sequencediagram}

doc/flows/kyc-balance.tex

@@ -49,9 +49,10 @@ if required.
 
 
 \begin{table}[h!]
-  \caption{Settings for the balance trigger}
+  \caption{Settings for the balance trigger.}
   \begin{tabular}{l|l|r}
     {\bf Setting}          & {\bf Type}         & {\bf Value} \\ \hline \hline
-    Default AML threshold  & Amount             & {\em 1000 CHF} \\
+    KYC threshold          & Amount             & {\em 5000 CHF} \\
+    Default AML threshold  & Amount             & {\em 5000 CHF} \\
   \end{tabular}
 \end{table}

doc/flows/kyc-deposit.tex

@@ -61,11 +61,13 @@
 
 
 \begin{table}[h!]
-  \caption{Settings for the deposit trigger}
+  \caption{Settings for the deposit trigger. Note that the operation
+  must satisfy all of the given rules.}
   \begin{tabular}{l|l|r}
     {\bf Setting}                 & {\bf Type}         & {\bf Value}    \\ \hline \hline
     Allowed bank accounts         & RFC 8905 RegEx     & {\em CH*}      \\ \hline
-    KYC deposit threshold         & Amount             & {\em 1000 CHF} \\
+    KYC deposit threshold         & Amount/month       & {\em  5000 CHF} \\
-    Default AML deposit threshold & Amount             & {\em 2500 CHF} \\
+    KYC deposit threshold         & Amount/year        & {\em 15000 CHF} \\
+    Default AML deposit threshold & Amount/month       & {\em  2500 CHF} \\
   \end{tabular}
 \end{table}

doc/flows/kyc-pull.tex

@@ -68,11 +68,13 @@
 
 
 \begin{table}[h!]
-  \caption{Settings for the pull payment trigger}
+  \caption{Settings for the pull payment trigger. Note that the operation
+  must satisfy all of the given rules.}
   \begin{tabular}{l|l|r}
     {\bf Setting}             & {\bf Type}      & {\bf Value} \\ \hline \hline
     Permitted phone numbers   & Dialing prefix  & {\em +41} \\
-    P2P KYC threshold         & Amount          & {\em  100 CHF} \\
+    P2P KYC threshold         & Amount/month    & {\em  5000 CHF} \\
-    Default P2P AML threshold & Amount          & {\em 1000 CHF} \\
+    P2P KYC threshold         & Amount/year     & {\em 15000 CHF} \\
+    Default P2P AML threshold & Amount/month    & {\em  1000 CHF} \\
   \end{tabular}
 \end{table}

doc/flows/kyc-push.tex

@@ -69,11 +69,13 @@
 
 
 \begin{table}[h!]
-  \caption{Settings for the push payment trigger}
+  \caption{Settings for the push payment trigger. Note that the operation
+  must satisfy all of the given rules.}
   \begin{tabular}{l|l|r}
     {\bf Setting}             & {\bf Type}     & {\bf Value} \\ \hline \hline
     Permitted phone numbers   & Dialing prefix & {\em +41} \\
-    P2P KYC threshold         & Amount         & {\em  100 CHF} \\
+    P2P KYC threshold         & Amount/month   & {\em  5000 CHF} \\
-    Default P2P AML threshold & Amount         & {\em 1000 CHF} \\
+    P2P KYC threshold         & Amount/year    & {\em 15000 CHF} \\
+    Default P2P AML threshold & Amount         & {\em  1000 CHF} \\
   \end{tabular}
 \end{table}

doc/flows/kyc-withdraw.tex

@@ -30,16 +30,21 @@
   \end{center}
   \caption{Regulatory process when withdrawing digital cash from a
     bank account.
-    When the transfer is denied the money is (eventually) returned to
+    If the transfer is denied or the user fails to withdraw the
+    funds for any other reason, the money is automatically returned
+    after the bounce period (see Table~\ref{table:kyc:withdraw:settings}) to
     the originating bank account.}
   \label{fig:kyc:withdraw}
 \end{figure}
 
 \begin{table}[h!]
-  \caption{Settings for the withdraw trigger}
+  \caption{Settings for the withdraw trigger. Note that the operation
+  must satisfy all of the given rules.} \label{table:kyc:withdraw:settings}
   \begin{tabular}{l|l|r}
-    {\bf Setting}            & {\bf Type}         & {\bf Value} \\ \hline \hline
+    {\bf Setting}            & {\bf Type}         &  {\bf Value} \\ \hline \hline
-    Allowed bank accounts    & RFC 8905 RegEx     & {\em CH*} \\ \hline
+    Allowed bank accounts    & RFC 8905 RegEx     &  {\em CH*} \\ \hline
-    Monthly withdraw maximum & Amount             & {\em 1000 CHF} \\
+    Withdraw maximum         & Amount/month       &  {\em 5000 CHF} \\
+    Withdraw maximum         & Amount/year        &  {\em 15000 CHF} \\
+    Bounce period            & Delay              &  1 month \\
   \end{tabular}
 \end{table}

doc/flows/main.tex

@@ -37,16 +37,48 @@ The main interactions of the system are:
   \item[shutdown] the Taler payment system operator informs the customers that the system is being shut down for good
 \end{description}
 
-Taler has no accounts (this is digital cash) and thus there is no ``opening''
+{\bf Customers} begin their business relationship with us when they withdraw
-or ``closing'' of accounts. The equivalent of ``opening'' an account is thus
+digital cash.  Taler has no accounts (this is digital cash) and thus there is
-to withdraw digital cash.  The equivalent of ``closing'' an account is to
+no ``opening'' or ``closing'' of accounts for consumers.  Given digital cash,
-either (1) deposit the funds explicitly into a bank account, or (2) the coins
+the customers can either (1) deposit the funds explicitly into a bank account
-will expire if the wallet was lost (including long-term offline or
+(see Section~\ref{sec:deposit}), (2) pay a merchant (see
+Section~\ref{sec:deposit}), (3) pay another customer using a peer-to-peer
+transfer (see Sections~\ref{sec:push} and~\ref{sec:pull}), or (4) the coins
+will expire if the wallet was lost (including offline for a long time or
 uninstalled).  Finally, if a wallet remains (occasionally) online but a user
-does simply not spend the coins will (3) diminish in value from the change
+does simply not spend the coins will (5) diminish in value from the change
 fees (see Section~\ref{sec:fees:coin}) that apply to prevent the coins from
 expiring outright.
 
+For customers, we will categorically limit of digital cash withdrawn per month
+to less than CHF 5000 per month and less than CHF 15000 per year, thus
+ensuring that consumers remain below the thresholds where most regulatory
+processes become applicable. We will, however, ensure that customers are Swiss
+(see Section~\ref{sec:proc:domestic}) by requiring them to have a Swiss bank
+account and/or Swiss phone number (+41-prefix).  Furthermore, the wallet will
+impose an upper limit of CHF 5000 on its balance at any point in time.
+
+For {\bf merchants}, the Taler equivalent of ``opening'' an account and thus
+establishing an ongoing business relationship is for a business to receive
+payments (see Section~\ref{sec:deposit}) exceeding CHF 5000/month or CHF
+15000/year.  We will consider the account ``open'' (and require up-to-date KYB
+information and check sanction lists) as long as the business has made any
+transactions within the last 24 months.
+
+In contrast to normal customers, merchants can in principle {\bf receive}
+payments without limit. However, these transactions must go into the bank
+account of the business: when digital coins are deposited at a business in
+Taler, the business never actually receives usable digital coins but instead
+the amount is always directly credited to their bank account.  Depending on
+the transacted amounts, the business will be subject to KYB
+(Section~\ref{sec:proc:kyb}) and AML checks. As we will only transfer money
+into the existing bank accounts of the merchants to compensate them for sales
+made using the Taler payment system, we do not need to check the origin of
+funds for those merchants as they will only receive funds from
+us.\footnote{Should businesses want to use Taler for expenditures, they will
+need to withdraw digital coins from their bank account just like customers,
+and the limits for customers will continue to apply.}
+
 The following sections describe the respective processes for each of these
 interactions.
 
@@ -119,7 +151,8 @@ The three main regulatory processes are:
 \end{description}
 
 \include{proc-domestic}
-\include{proc-kyc}
+%\include{proc-kyc}
+\include{proc-kyb}
 \include{proc-aml}
 
 \chapter{Fees} \label{chap:fees}

doc/flows/proc-domestic.tex

@@ -1,4 +1,4 @@
-\section{Domestic wallet check}
+\section{Domestic wallet check} \label{sec:proc:domestic}
 
 \begin{figure}[h!]
   \begin{sequencediagram}