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#!/bin/bash
# This file is in the public domain.
#
# This script configure and launches the Taler exchange.
#
# The environment must provide the following variables:
#
# - BANK_EXCHANGE_PASSWORD (exchange password for libeufin-bank)
# - EXCHANGE_WIRE_GATEWAY_URL (where is the exchange wire gateway / libeufin-nexus)
# - EXCHANGE_PAYTO (exchange account PAYTO)
# - ENABLE_TLS (http or https?)
# - DOMAIN_NAME: DNS domain name to use for the setup
#
set -eu
notify_exit() {
[[ $1 == 0 ]] || echo Script "$0" failed, exit code "$1"
}
notify_err() {
echo "errexit on line $(caller)" >&2
}
trap '(exit 130)' INT
trap '(exit 143)' TERM
trap notify_err ERR
# shellcheck disable=SC2154
trap 'rc=$?; notify_exit $rc; exit $rc' EXIT
# End of error handling setup
source functions.sh
source config/user.conf
source config/internal.conf
EXCHANGE_DB="taler-exchange"
say "Beginning Exchange setup"
if test -z "${BANK_EXCHANGE_PASSWORD:-}"; then
say "Failure: BANK_EXCHANGE_PASSWORD not set"
exit 1
fi
if test -z "${EXCHANGE_PAYTO:-}"; then
say "Failure: EXCHANGE_PAYTO not set"
exit 1
fi
function die() {
say "$1"
exit 1
}
# Just try if sudo works for diagnostics
sudo -i -u taler-exchange-offline id >/dev/null || die "Error: Unable to switch to taler-exchange-offline user"
# Create master key as taler-exchange-offline *unless* user already
# set the MASTER_PUBLIC_KEY to some value we can use.
export MASTER_PRIV_DIR=.local/share/taler/exchange/offline-keys
export MASTER_PRIV_FILE=${MASTER_PRIV_DIR}/master.priv
export SECMOD_TOFU_FILE=${MASTER_PRIV_DIR}/secm_tofus.pub
if test -z "${MASTER_PUBLIC_KEY:-}"; then
if test "${DO_OFFLINE:-y}" == n; then
say "Error: No MASTER_PUBLIC_KEY but DO_OFFLINE set to NO"
exit 1
fi
say "Setting up offline key"
echo -e "[exchange-offline]\n"\
"MASTER_PRIV_FILE=\$HOME/${MASTER_PRIV_FILE}\n"\
"SECM_TOFU_FILE=\$HOME/${SECMOD_TOFU_FILE}\n"\
>/etc/taler/conf.d/offline-setup.conf
MASTER_PUBLIC_KEY=$(sudo -i -u taler-exchange-offline taler-exchange-offline -c /etc/taler/taler.conf -LDEBUG setup 2>> setup.log)
echo "MASTER_PUBLIC_KEY=\"${MASTER_PUBLIC_KEY}\"" >>config/user.conf
if test -z "${DO_OFFLINE:-}"; then
# Set 'DO_OFFLINE'
DO_OFFLINE=y
echo "DO_OFFLINE=y" >>config/user.conf
fi
else
say "Master public key is $MASTER_PUBLIC_KEY"
if test ${DO_OFFLINE:-y} == y; then
MASTER_PUBLIC_KEY2=$(sudo -i -u taler-exchange-offline taler-exchange-offline -c /etc/taler/taler.conf setup 2>> setup.log)
if test "${MASTER_PUBLIC_KEY2}" != "${MASTER_PUBLIC_KEY}"; then
say "Error: master public key missmatch ${MASTER_PUBLIC_KEY2} does not match ${MASTER_PUBLIC_KEY}"
exit 1
fi
fi
fi
say "Stopping running exchange before reconfiguration"
systemctl stop taler-exchange.target &>> setup.log
say "Configuring exchange"
# Generate terms of service (ToS)
TERMS_ETAG=
if test ${DO_EXCHANGE_TERMS} == y; then
if test -z "${EXCHANGE_TERMS_FILE:-}"; then
say "Error: No EXCHANGE_TERMS_FILE set but DO_EXCHANGE_TERMS set to YES"
exit 1
fi
TERMS_ETAG="$(basename "$EXCHANGE_TERMS_FILE" .rst)"
say "Setting up terms of service (ToS)"
taler-terms-generator -i "${EXCHANGE_TERMS_FILE}" &>> setup.log
fi
# Generate privacy policy
PRIVACY_ETAG=
if test ${DO_EXCHANGE_PRIVACY} == y; then
if test -z "${EXCHANGE_PRIVACY_FILE:-}"; then
say "Error: No EXCHANGE_PRIVACY_FILE set but DO_EXCHANGE_PRIVACY set to YES"
exit 1
fi
PRIVACY_ETAG="$(basename "$EXCHANGE_PRIVACY_FILE" .rst)"
say "Setting up the privacy policy"
taler-terms-generator -i "${EXCHANGE_PRIVACY_FILE}" &>> setup.log
fi
export EXCHANGE_BASE_URL="$PROTO://exchange.${DOMAIN_NAME}/"
cat << EOF > /etc/taler/conf.d/setup.conf
[taler]
CURRENCY=${CURRENCY}
CURRENCY_ROUND_UNIT=${CURRENCY}:0.01
[exchange]
AML_THRESHOLD=${CURRENCY}:1000000
MASTER_PUBLIC_KEY=${MASTER_PUBLIC_KEY}
BASE_URL=${EXCHANGE_BASE_URL}
STEFAN_ABS=${CURRENCY}:0
STEFAN_LOG=${CURRENCY}:0
STEFAN_LIN=0
TERMS_ETAG=${TERMS_ETAG}
PRIVACY_ETAG=${PRIVACY_ETAG}
[merchant-exchange-${DOMAIN_NAME}]
MASTER_KEY=${MASTER_PUBLIC_KEY}
CURRENCY=${CURRENCY}
EXCHANGE_BASE_URL=${EXCHANGE_BASE_URL}
[exchange-account-default]
PAYTO_URI=${EXCHANGE_PAYTO}
ENABLE_DEBIT=YES
ENABLE_CREDIT=YES
@inline-secret@ exchange-accountcredentials-default ../secrets/exchange-accountcredentials-default.secret.conf
EOF
cat << EOF > /etc/taler/secrets/exchange-db.secret.conf
[exchangedb-postgres]
CONFIG=postgres:///exchange
EOF
chmod 440 /etc/taler/secrets/exchange-db.secret.conf
chown root:taler-exchange-db /etc/taler/secrets/exchange-db.secret.conf
cat << EOF > /etc/taler/secrets/exchange-accountcredentials-default.secret.conf
[exchange-accountcredentials-default]
WIRE_GATEWAY_URL=${PROTO}://bank.$DOMAIN_NAME/accounts/exchange/taler-wire-gateway/
WIRE_GATEWAY_AUTH_METHOD=basic
USERNAME=exchange
PASSWORD=${BANK_EXCHANGE_PASSWORD}
EOF
chmod 400 /etc/taler/secrets/exchange-accountcredentials-default.secret.conf
chown taler-exchange-wire:taler-exchange-db /etc/taler/secrets/exchange-accountcredentials-default.secret.conf
taler-harness deployment gen-coin-config \
--min-amount "${CURRENCY}":0.01 \
--max-amount "${CURRENCY}":100 |
sed -e "s/FEE_DEPOSIT = ${CURRENCY}:0.01/FEE_DEPOSIT = ${CURRENCY}:0/" \
>/etc/taler/conf.d/"${CURRENCY}"-coins.conf
say "Initializing exchange database"
taler-exchange-dbconfig -c /etc/taler/taler.conf &>> setup.log
say "Launching exchange"
systemctl enable taler-exchange.target &>> setup.log
systemctl restart taler-exchange.target &>> setup.log
say "Waiting for exchange HTTP service (/config)..."
curl -sS --max-time 2 \
--retry-all-errors \
--retry-delay 2 \
--retry 10 \
"${EXCHANGE_BASE_URL}"config &>> setup.log
say "Waiting for exchange management keys (this may take a while)..."
curl -sS --max-time 30 \
--retry-delay 2 \
--retry 60 \
"${EXCHANGE_BASE_URL}"management/keys &>> setup.log
if test ${DO_OFFLINE} == y; then
say "Offline interaction..."
sudo -i -u taler-exchange-offline \
taler-exchange-offline \
-c /etc/taler/taler.conf \
download \
sign \
upload &>> setup.log
say "Exchange account setup..."
sudo -i -u taler-exchange-offline \
taler-exchange-offline \
enable-account "${EXCHANGE_PAYTO}" \
display-hint 0 "${CURRENCY} Exchange" \
wire-fee now x-taler-bank "${CURRENCY}":0 "${CURRENCY}":0 \
global-fee now "${CURRENCY}":0 "${CURRENCY}":0 "${CURRENCY}":0 1h 6a 0 \
upload &>> setup.log
say "Enabling timer to automate renewals..."
systemctl enable taler-exchange-offline.timer &>> setup.log
systemctl restart taler-exchange-offline.timer &>> setup.log
if test ${DO_CONVERSION} == y; then
say "Conversion account setup (restricted to CH-only)..."
sudo -i -u taler-exchange-offline taler-exchange-offline \
enable-account "${CONVERSION_PAYTO}" \
display-hint 10 "${FIAT_BANK_NAME}" \
conversion-url "${PROTO}://bank.$DOMAIN_NAME/conversion-info/" \
debit-restriction deny \
wire-fee now iban "${CURRENCY}":0 "${CURRENCY}":0 \
upload &>> setup.log
fi
fi
say "Waiting for exchange /keys..."
curl -sS --max-time 2 \
--retry-connrefused \
--retry-delay 2 \
--retry 10 \
"${EXCHANGE_BASE_URL}"keys &>> setup.log
say "Exchange setup finished"
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