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Base system with REST service to issue digital coins, run by the payment service provider
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taler-exchange-helper-measure-tops-sms-check (4419B)

      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 # Exit, with error message (hard failure)
     22 function exit_fail() {
     23     echo " FAIL: " "$@" >&2
     24     EXIT_STATUS=1
     25     exit "$EXIT_STATUS"
     26 }
     27 
     28 CONF="$HOME/.config/taler-exchange.conf"
     29 VERBOSE=0
     30 
     31 while getopts 'ac:hirvV' OPTION;
     32 do
     33     case "$OPTION" in
     34         a)
     35             # Phone number is required.
     36             echo "CONTACT_PHONE"
     37             exit 0
     38             ;;
     39         c)
     40             # shellcheck disable=SC2034
     41             CONF="$OPTARG"
     42             ;;
     43         h)
     44             echo "This is a KYC measure program that lifts restrictions on withdraw and P2P transfers after a phone number was confirmed via SMS. Expiration rules are set based on the context."
     45             echo 'Supported options:'
     46             echo '  -a           -- show required attributes'
     47             # shellcheck disable=SC2016
     48             echo '  -c $CONF     -- set configuration'
     49             echo '  -h           -- print this help'
     50             echo '  -i           -- show required inputs'
     51             echo '  -r           -- show required context'
     52             echo '  -v           -- show version'
     53             echo '  -V           -- be verbose'
     54             exit 0
     55             ;;
     56         i)
     57             # Need attributes, context and current_rules.
     58             echo "attributes"
     59             echo "context"
     60             echo "current_rules"
     61             exit 0
     62             ;;
     63         r)
     64             exit 0
     65             ;;
     66         v)
     67             echo "$0 v0.0.2"
     68             exit 0
     69             ;;
     70         V)
     71             VERBOSE=1
     72             ;;
     73         ?)
     74         exit_fail "Unrecognized command line option"
     75         ;;
     76     esac
     77 done
     78 
     79 if [ 1 = "$VERBOSE" ]
     80 then
     81     echo "Running $0" 1>&2
     82 fi
     83 
     84 # See https://docs.taler.net/taler-kyc-manual.html#tsref-type-AmlProgramInput
     85 # for the full JSON with possible inputs.
     86 
     87 # First, extract inputs we need
     88 INPUTS=$(jq '{"current_rules":.current_rules,"attributes":.attributes,"context":.context}')
     89 
     90 # Get phone number.
     91 PHONE_NUMBER=$(echo "$INPUTS" | jq -r '.attributes.CONTACT_PHONE // null')
     92 # Get current rules.
     93 CURRENT_RULES=$(echo "$INPUTS" | jq '.current_rules // null')
     94 # Get context values.
     95 EXPIRATION_TIME=$(echo "$INPUTS" | jq '.context.expiration_time // .attributes.expires // .current_rules.expiration_time // null')
     96 SUCCESSOR_MEASURE=$(echo "$INPUTS" | jq '.context.successor_measure // .current_rules.successor_measure // null')
     97 CUSTOM_MEASURES=$(echo "$INPUTS" | jq '.context.custom_measures // null')
     98 
     99 # Validate phone number
    100 if eval echo "$PHONE_NUMBER" | grep -E -e "${EXCHANGE_AML_PROGRAM_TOPS_SMS_CHECK_REGEX}" > /dev/null
    101 then
    102     # Valid phone number
    103     # Remove limitation from current rules.
    104     NEW_RULES=$(echo "$CURRENT_RULES" | jq 'del(.rules[] | select ((.rule_name=="p2p-domestic-identification-requirement") or (.rule_name=="withdraw-limit-low") ))')
    105 
    106 # Remove test rules that should now be satisfied
    107 NEW_RULES=$(echo "$NEW_RULES" | jq 'del(.rules[] | select (.rule_name=="balance-testing-limit1") )')
    108 
    109     TO_INVESTIGATE="false"
    110 else
    111     # Invalid phone number
    112     echo "Phone number ${PHONE_NUMBER} invalid." 1>&2
    113     NEW_RULES=$(echo "$CURRENT_RULES" | jq '.+{"to_investigate": true}')
    114     TO_INVESTIGATE="true"
    115 fi
    116 
    117 
    118 # Finally, output the new rules.
    119 # See https://docs.taler.net/taler-kyc-manual.html#tsref-type-AmlOutcome
    120 # for the required output format.
    121 
    122 exec jq -n \
    123     --argjson et "$EXPIRATION_TIME" \
    124     --argjson sm "$SUCCESSOR_MEASURE" \
    125     --argjson cm "$CUSTOM_MEASURES" \
    126     --argjson nr "$NEW_RULES" \
    127     --argjson inv "$TO_INVESTIGATE" \
    128     '{"new_rules":($nr+{"expiration_time":$et,"successor_measure":$sm,"custom_measures":({}+$nr.custom_measures+$cm)}),"to_investigate":$inv}|del(..|nulls)'