exchange

Base system with REST service to issue digital coins, run by the payment service provider
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taler-exchange-helper-measure-update-from-context (3809B)

      1 #!/bin/bash
      2 #
      3 #  This file is part of TALER
      4 #  Copyright (C) 2024 Taler Systems SA
      5 #
      6 #  TALER is free software; you can redistribute it and/or modify it under the
      7 #  terms of the GNU General Public License as published by the Free Software
      8 #  Foundation; either version 3, or (at your option) any later version.
      9 #
     10 #  TALER is distributed in the hope that it will be useful, but WITHOUT ANY
     11 #  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
     12 #  A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
     13 #
     14 #  You should have received a copy of the GNU General Public License along with
     15 #  TALER; see the file COPYING.  If not, If not, see <http://www.gnu.org/license>
     16 #
     17 
     18 # Hard error reporting on.
     19 set -eu
     20 
     21 
     22 
     23 # Exit, with error message (hard failure)
     24 function exit_fail() {
     25     echo " FAIL: " "$@" >&2
     26     EXIT_STATUS=1
     27     exit "$EXIT_STATUS"
     28 }
     29 
     30 CONF="$HOME/.config/taler-exchange.conf"
     31 VERBOSE=0
     32 
     33 while getopts 'ac:hirvV' OPTION;
     34 do
     35     case "$OPTION" in
     36         a)
     37             # No attributes are required.
     38             exit 0
     39             ;;
     40         c)
     41             # shellcheck disable=SC2034
     42             CONF="$OPTARG"
     43             ;;
     44         h)
     45             echo "This is a KYC measure program that updates the current rules of an account based on values given in the context."
     46             echo 'Supported options:'
     47             echo '  -a           -- show required attributes'
     48             # shellcheck disable=SC2016
     49             echo '  -c $CONF     -- set configuration'
     50             echo '  -h           -- print this help'
     51             echo '  -i           -- show required inputs'
     52             echo '  -r           -- show required context'
     53             echo '  -v           -- show version'
     54             echo '  -V           -- be verbose'
     55             exit 0
     56             ;;
     57         i)
     58             # Need context and current_rules.
     59             echo "context"
     60             echo "current_rules"
     61             echo "default_rules"
     62             exit 0
     63             ;;
     64         r)
     65             # Need new_rules, custom_measures, expiration time and successor measure.
     66             echo "new_rules"
     67             echo "custom_measures"
     68             echo "expiration_time"
     69             echo "successor_measure"
     70             exit 0
     71             ;;
     72         v)
     73             echo "$0 v0.0.0"
     74             exit 0
     75             ;;
     76         V)
     77             VERBOSE=1
     78             ;;
     79         ?)
     80         exit_fail "Unrecognized command line option"
     81         ;;
     82     esac
     83 done
     84 
     85 if [ 1 = "$VERBOSE" ]
     86 then
     87     echo "Running $0" 1>&2
     88 fi
     89 
     90 # See https://docs.taler.net/taler-kyc-manual.html#tsref-type-AmlProgramInput
     91 # for the full JSON with possible inputs.
     92 
     93 # First, extract inputs we need
     94 INPUTS=$(jq '{"context":.context,"current_rules":(.current_rules // .default_rules // error("neither current_rules nor default_rules provided"))}')
     95 
     96 # Get context values.
     97 EXPIRATION_TIME=$(echo "$INPUTS" | jq '.context.expiration_time // .current_rules.expiration_time // null')
     98 SUCCESSOR_MEASURE=$(echo "$INPUTS" | jq '.context.successor_measure // .current_rules.successor_measure // null')
     99 CUSTOM_MEASURES=$(echo "$INPUTS" | jq '.context.custom_measures // null')
    100 NEW_RULES=$(echo "$INPUTS" | jq '.context.new_rules // null')
    101 
    102 # Finally, output the new rules.
    103 # See https://docs.taler.net/taler-kyc-manual.html#tsref-type-AmlOutcome
    104 # for the required output format.
    105 
    106 echo "$INPUTS" \
    107     | jq \
    108           --argjson et "$EXPIRATION_TIME" \
    109           --argjson sm "$SUCCESSOR_MEASURE" \
    110           --argjson cm "$CUSTOM_MEASURES" \
    111           --argjson nr "$NEW_RULES" \
    112           '.current_rules+{"new_rules":(.current_rules.new_rules+{"expiration_time":$et,"successor_measure":$sm,"rules":(.current_rules.new_rules.rules+$nr),"custom_measures":({}+.current_rules.custom_measures+$cm)})}|del(..|nulls)'
    113 
    114 exit 0