#!/bin/bash
# Script to test revocation.
#
# Requires the wallet CLI to be installed and in the path.  Furthermore, the
# user running this script must be Postgres superuser and be allowed to
# create/drop databases.
#
set -eu

# Cleanup to run whenever we exit
function cleanup()
{
    for n in `jobs -p`
    do
        kill $n 2> /dev/null || true
    done
    wait
}

# Install cleanup handler (except for kill -9)
trap cleanup EXIT

# Exit, with status code "skip" (no 'real' failure)
function exit_skip() {
    echo $1
    exit 77
}

# Where do we write the result?
export BASEDB=${1:-"revoke-basedb"}

# Name of the Postgres database we will use for the script.
# Will be dropped, do NOT use anything that might be used
# elsewhere
export TARGET_DB=taler-auditor-revokedb
TMP_DIR=`mktemp -d revocation-tmp-XXXXXX`
export WALLET_DB=wallet-revocation.json
rm -f $WALLET_DB

# Configuration file will be edited, so we create one
# from the template.
export CONF=generate-auditor-basedb-revocation.conf
cp generate-auditor-basedb-template.conf $CONF


echo -n "Testing for taler-bank-manage"
taler-bank-manage --help >/dev/null </dev/null || exit_skip " MISSING"
echo " FOUND"
echo -n "Testing for taler-wallet-cli"
taler-wallet-cli -v >/dev/null </dev/null || exit_skip " MISSING"
echo " FOUND"



# Clean up
DATA_DIR=`taler-config -f -c $CONF -s PATHS -o TALER_HOME`
rm -rf $DATA_DIR || true

# reset database
dropdb $TARGET_DB >/dev/null 2>/dev/null || true
createdb $TARGET_DB || exit_skip "Could not create database $TARGET_DB"

# obtain key configuration data
MASTER_PRIV_FILE=`taler-config -f -c $CONF -s EXCHANGE -o MASTER_PRIV_FILE`
MASTER_PRIV_DIR=`dirname $MASTER_PRIV_FILE`
mkdir -p $MASTER_PRIV_DIR
gnunet-ecc -g1 $MASTER_PRIV_FILE > /dev/null
export MASTER_PUB=`gnunet-ecc -p $MASTER_PRIV_FILE`
export EXCHANGE_URL=`taler-config -c $CONF -s EXCHANGE -o BASE_URL`
MERCHANT_PORT=`taler-config -c $CONF -s MERCHANT -o PORT`
export MERCHANT_URL=http://localhost:${MERCHANT_PORT}/
BANK_PORT=`taler-config -c $CONF -s BANK -o HTTP_PORT`
export BANK_URL=http://localhost:${BANK_PORT}/
export AUDITOR_URL=http://localhost:8083/
AUDITOR_PRIV_FILE=`taler-config -f -c $CONF -s AUDITOR -o AUDITOR_PRIV_FILE`
AUDITOR_PRIV_DIR=`dirname $AUDITOR_PRIV_FILE`
mkdir -p $AUDITOR_PRIV_DIR
gnunet-ecc -g1 $AUDITOR_PRIV_FILE > /dev/null
AUDITOR_PUB=`gnunet-ecc -p $AUDITOR_PRIV_FILE`

# patch configuration
taler-config -c $CONF -s exchange -o MASTER_PUBLIC_KEY -V $MASTER_PUB
taler-config -c $CONF -s merchant-exchange-default -o MASTER_KEY -V $MASTER_PUB
taler-config -c $CONF -s exchangedb-postgres -o CONFIG -V postgres:///$TARGET_DB
taler-config -c $CONF -s auditordb-postgres -o CONFIG -V postgres:///$TARGET_DB
taler-config -c $CONF -s merchantdb-postgres -o CONFIG -V postgres:///$TARGET_DB
taler-config -c $CONF -s bank -o database -V postgres:///$TARGET_DB
taler-config -c $CONF -s exchange -o KEYDIR -V "${TMP_DIR}/keydir/"
taler-config -c $CONF -s exchange -o REVOCATION_DIR -V "${TMP_DIR}/revdir/"

# setup exchange
echo "Setting up exchange"
taler-exchange-dbinit -c $CONF

echo "Setting up merchant"
taler-merchant-dbinit -c $CONF

# setup auditor
echo "Setting up auditor"
taler-auditor-dbinit -c $CONF
taler-auditor-exchange -c $CONF -m $MASTER_PUB -u $EXCHANGE_URL

# Launch services
echo "Launching services"
taler-bank-manage-testing $CONF postgres:///$TARGET_DB serve &> revocation-bank.log &
TFN=`which taler-exchange-httpd`
TBINPFX=`dirname $TFN`
TLIBEXEC=${TBINPFX}/../lib/taler/libexec/
taler-exchange-secmod-eddsa -c $CONF 2> taler-exchange-secmod-eddsa.log &
SIGNKEY_HELPER_PID=$!
taler-exchange-secmod-rsa -c $CONF 2> taler-exchange-secmod-rsa.log &
DENOM_HELPER_PID=$!
taler-exchange-httpd -c $CONF 2> taler-exchange-httpd.log &
EXCHANGE_PID=$!
taler-merchant-httpd -c $CONF -L INFO 2> taler-merchant-httpd.log &
MERCHANT_PID=$!
taler-exchange-wirewatch -c $CONF 2> taler-exchange-wirewatch.log &
taler-auditor-httpd -c $CONF 2> taler-auditor-httpd.log &

# Wait for all bank to be available (usually the slowest)
for n in `seq 1 50`
do
    echo -n "."
    sleep 0.2
    OK=0
    # bank
    wget http://localhost:8082/ -o /dev/null -O /dev/null >/dev/null || continue
    OK=1
    break
done

if [ 1 != $OK ]
then
    exit_skip "Failed to launch services"
fi

# Wait for all other services to be available
for n in `seq 1 50`
do
    echo -n "."
    sleep 0.1
    OK=0
    # exchange
    wget http://localhost:8081/seed -o /dev/null -O /dev/null >/dev/null || continue
    # merchant
    wget http://localhost:9966/ -o /dev/null -O /dev/null >/dev/null || continue
    # Auditor
    wget http://localhost:8083/ -o /dev/null -O /dev/null >/dev/null || continue
    OK=1
    break
done

if [ 1 != $OK ]
then
    cleanup
    exit_skip "Failed to launch services"
fi
echo " DONE"

echo -n "Setting up keys"

taler-exchange-offline -c $CONF \
  download sign \
  enable-account payto://x-taler-bank/localhost/Exchange \
  enable-auditor $AUDITOR_PUB $AUDITOR_URL "TESTKUDOS Auditor" \
  wire-fee now x-taler-bank TESTKUDOS:0.01 TESTKUDOS:0.01 \
  upload &> taler-exchange-offline.log

echo -n "."

for n in `seq 1 2`
do
    echo -n "."
    OK=0
    # bank
    wget --timeout=1 http://localhost:8081/keys -o /dev/null -O /dev/null >/dev/null || continue
    OK=1
    break
done

if [ 1 != $OK ]
then
    exit_skip "Failed to setup keys"
fi


taler-auditor-offline -c $CONF \
  download sign upload &> taler-auditor-offline.log

echo " DONE"

# Setup merchant
echo -n "Setting up merchant"

curl -H "Content-Type: application/json" -X POST -d '{"payto_uris":["payto://x-taler-bank/localhost/43"],"id":"default","name":"default","address":{},"jurisdiction":{},"default_max_wire_fee":"TESTKUDOS:1", "default_max_deposit_fee":"TESTKUDOS:1","default_wire_fee_amortization":1,"default_wire_transfer_delay":{"d_ms" : 3600000},"default_pay_delay":{"d_ms": 3600000}}' http://localhost:9966/private/instances


# run wallet CLI
echo "Running wallet"

taler-wallet-cli --no-throttle --wallet-db=$WALLET_DB api 'withdrawTestBalance' \
  "$(jq -n '
    {
      amount: "TESTKUDOS:8",
      bankBaseUrl: $BANK_URL,
      exchangeBaseUrl: $EXCHANGE_URL,
    }' \
    --arg BANK_URL $BANK_URL \
    --arg EXCHANGE_URL $EXCHANGE_URL
  )"

taler-wallet-cli --no-throttle --wallet-db=$WALLET_DB run-until-done

export coins=$(taler-wallet-cli --wallet-db=$WALLET_DB advanced dump-coins)

echo -n "COINS are:"
echo $coins

# Find coin we want to revoke
export rc=$(echo "$coins" | jq -r '[.coins[] | select((.denom_value == "TESTKUDOS:2"))][0] | .coin_pub')
# Find the denom
export rd=$(echo "$coins" | jq -r '[.coins[] | select((.denom_value == "TESTKUDOS:2"))][0] | .denom_pub_hash')
echo "Revoking denomination ${rd} (to affect coin ${rc})"
# Find all other coins, which will be suspended
export susp=$(echo "$coins" | jq --arg rc "$rc" '[.coins[] | select(.coin_pub != $rc) | .coin_pub]')

# Do the revocation
taler-exchange-offline -c $CONF \
  revoke-denomination "${rd}" upload &> taler-exchange-offline-revoke.log

sleep 1 # Give exchange time to create replacmenent key

# Re-sign replacment keys
taler-auditor-offline -c $CONF \
  download sign upload &> taler-auditor-offline.log

# Now we suspend the other coins, so later we will pay with the recouped coin
taler-wallet-cli --wallet-db=$WALLET_DB advanced suspend-coins "$susp"

# Update exchange /keys so recoup gets scheduled
taler-wallet-cli --wallet-db=$WALLET_DB exchanges update \
                 -f $EXCHANGE_URL

# Block until scheduled operations are done
taler-wallet-cli --wallet-db=$WALLET_DB run-until-done

# Now we buy something, only the coins resulting from recouped will be
# used, as other ones are suspended
taler-wallet-cli --no-throttle --wallet-db=$WALLET_DB api 'testPay' \
  "$(jq -n '
    {
      amount: "TESTKUDOS:1",
      merchantBaseUrl: $MERCHANT_URL,
      summary: "foo",
    }' \
    --arg MERCHANT_URL $MERCHANT_URL
  )"

taler-wallet-cli --wallet-db=$WALLET_DB run-until-done

echo "Purchase with recoup'ed coin (via reserve) done"

# Find coin we want to refresh, then revoke
export rrc=$(echo "$coins" | jq -r '[.coins[] | select((.denom_value == "TESTKUDOS:5"))][0] | .coin_pub')
# Find the denom
export zombie_denom=$(echo "$coins" | jq -r '[.coins[] | select((.denom_value == "TESTKUDOS:5"))][0] | .denom_pub_hash')

echo "Will refresh coin ${rrc} of denomination ${zombie_denom}"
# Find all other coins, which will be suspended
export susp=$(echo "$coins" | jq --arg rrc "$rrc" '[.coins[] | select(.coin_pub != $rrc) | .coin_pub]')

export rrc
export zombie_denom

# Travel into the future! (must match DURATION_WITHDRAW option)
export TIMETRAVEL="--timetravel=604800000000"

echo "Launching exchange 1 week in the future"
kill -TERM $EXCHANGE_PID
kill -TERM $DENOM_HELPER_PID
kill -TERM $SIGNKEY_HELPER_PID
taler-exchange-secmod-eddsa $TIMETRAVEL -c $CONF 2> taler-exchange-secmod-eddsa.log &
SIGNKEY_HELPER_PID=$!
taler-exchange-secmod-rsa $TIMETRAVEL -c $CONF 2> taler-exchange-secmod-rsa.log &
DENOM_HELPER_PID=$!
taler-exchange-httpd $TIMETRAVEL -c $CONF 2> taler-exchange-httpd.log &
export EXCHANGE_PID=$!

# Wait for exchange to be available
for n in `seq 1 50`
do
    echo -n "."
    sleep 0.1
    OK=0
    # exchange
    wget http://localhost:8081/ -o /dev/null -O /dev/null >/dev/null || continue
    OK=1
    break
done

echo "Refreshing coin $rrc"
taler-wallet-cli $TIMETRAVEL --wallet-db=$WALLET_DB advanced force-refresh "$rrc"
taler-wallet-cli $TIMETRAVEL --wallet-db=$WALLET_DB run-until-done

# Update our list of the coins
export coins=$(taler-wallet-cli $TIMETRAVEL --wallet-db=$WALLET_DB advanced dump-coins)

# Find resulting refreshed coin
export freshc=$(echo "$coins" | jq -r --arg rrc "$rrc" \
  '[.coins[] | select((.refresh_parent_coin_pub == $rrc) and .denom_value == "TESTKUDOS:0.1")][0] | .coin_pub'
)

# Find the denom of freshc
export fresh_denom=$(echo "$coins" | jq -r --arg rrc "$rrc" \
  '[.coins[] | select((.refresh_parent_coin_pub == $rrc) and .denom_value == "TESTKUDOS:0.1")][0] | .denom_pub_hash'
)

echo "Coin ${freshc} of denomination ${fresh_denom} is the result of the refresh"

# Find all other coins, which will be suspended
export susp=$(echo "$coins" | jq --arg freshc "$freshc" '[.coins[] | select(.coin_pub != $freshc) | .coin_pub]')


# Do the revocation of freshc
echo "Revoking ${fresh_denom} (to affect coin ${freshc})"
taler-exchange-offline -c $CONF \
  revoke-denomination "${fresh_denom}" upload &> taler-exchange-offline-revoke-2.log

sleep 1 # Give exchange time to create replacmenent key

# Re-sign replacment keys
taler-auditor-offline -c $CONF \
  download sign upload &> taler-auditor-offline.log

# Now we suspend the other coins, so later we will pay with the recouped coin
taler-wallet-cli $TIMETRAVEL --wallet-db=$WALLET_DB advanced suspend-coins "$susp"

# Update exchange /keys so recoup gets scheduled
taler-wallet-cli $TIMETRAVEL --wallet-db=$WALLET_DB exchanges update \
                 -f $EXCHANGE_URL

# Block until scheduled operations are done
taler-wallet-cli $TIMETRAVEL --wallet-db=$WALLET_DB run-until-done

echo "Restarting merchant (so new keys are known)"
kill -TERM $MERCHANT_PID
taler-merchant-httpd -c $CONF -L INFO 2> taler-merchant-httpd.log &
MERCHANT_PID=$!
# Wait for merchant to be again available
for n in `seq 1 50`
do
    echo -n "."
    sleep 0.1
    OK=0
    # merchant
    wget http://localhost:9966/ -o /dev/null -O /dev/null >/dev/null || continue
    OK=1
    break
done

# Now we buy something, only the coins resulting from recoup+refresh will be
# used, as other ones are suspended
taler-wallet-cli $TIMETRAVEL --no-throttle --wallet-db=$WALLET_DB api 'testPay' \
  "$(jq -n '
    {
      amount: "TESTKUDOS:0.02",
      merchantBaseUrl: $MERCHANT_URL,
      summary: "bar",
    }' \
    --arg MERCHANT_URL $MERCHANT_URL
  )"
taler-wallet-cli $TIMETRAVEL --wallet-db=$WALLET_DB run-until-done

echo "Bought something with refresh-recouped coin"

echo "Shutting down services"
cleanup


# Dump database
echo "Dumping database"
pg_dump -O $TARGET_DB | sed -e '/AS integer/d' > ${BASEDB}.sql

echo $MASTER_PUB > ${BASEDB}.mpub
date +%s > ${BASEDB}.age

# clean up
echo "Final clean up"
dropdb $TARGET_DB
rm -rf $DATA_DIR || true
rm -f $CONF
rm -r $TMP_DIR

echo "====================================="
echo "  Finished revocation DB generation  "
echo "====================================="

exit 0