# shellcheck shell=bash
# Shared helpers for taler-monitoring (laptop or koopa).

# Default stack = GOA / hacktivism (overridden by TALER_DOMAIN / --domain)
: "${TALER_DOMAIN:=hacktivism.ch}"
: "${BANK_PUBLIC:=https://bank.hacktivism.ch}"
: "${EXCHANGE_PUBLIC:=https://exchange.hacktivism.ch}"
: "${MERCHANT_PUBLIC:=https://taler.hacktivism.ch}"
: "${BANK_LOCAL:=http://127.0.0.1:9012}"
: "${EXCHANGE_LOCAL:=http://127.0.0.1:9011}"
: "${MERCHANT_LOCAL:=https://127.0.0.1:9010}"
: "${LANDING_LOCAL:=http://127.0.0.1:9013}"
: "${KOOPA_SSH:=koopa}"
: "${MERCHANT_INSTANCE:=goa-demo-cp4zqk}"
: "${WITHDRAW_AMT:=GOA:20}"   # single-shot fallback; e2e ladder uses ATM notes
: "${PAY_AMT:=GOA:0.01}"
: "${CREDIT_AMT:=GOA:4700}"  # covers ATM ladder 20+50+100+200+4200 (paivana)
: "${TIMEOUT:=12}"
: "${E2E_TIMEOUT:=55}"       # whole e2e budget; skip rest when exceeded (e2e raises as needed)
: "${E2E_PAY_SECS:=22}"      # dedicated seconds for pay handle-uri (avoid Alarm clock)
# Local GOA: public paivana paywall (https://paivana.hacktivism.ch · template GOA:4200)
: "${PAIVANA_PUBLIC:=https://paivana.hacktivism.ch}"
: "${E2E_PAIVANA:=1}"        # 0 = skip paivana section in e2e
# Devtest: inject reserve credit via wire-gateway admin/add-incoming (optional).
# Default off once wirewatch DNS works; set E2E_FAKE_INCOMING=1 to force.
: "${E2E_FAKE_INCOMING:=0}"
# SSH must never hang the monitoring run
: "${SSH_CONNECT_TIMEOUT:=3}"
: "${SSH_CMD_TIMEOUT:=12}"   # hard cap for whole remote script (seconds)
: "${SKIP_SSH:=0}"
# Expected currency for public /config checks (empty = report only, don't fail)
: "${EXPECT_CURRENCY:=GOA}"
# 1 = this is the local koopa/hacktivism stack (inside/e2e/SSH make sense)
: "${LOCAL_STACK:=1}"
# Probe merchant host candidates when applying a generic domain (0=off)
: "${TALER_DOMAIN_PROBE:=1}"

BANK_PUBLIC=${BANK_PUBLIC%/}
EXCHANGE_PUBLIC=${EXCHANGE_PUBLIC%/}
MERCHANT_PUBLIC=${MERCHANT_PUBLIC%/}

# ---------------------------------------------------------------------------
# Domain profiles → bank / exchange / merchant base URLs
#
# Single place to declare a stack: scripts/taler-monitoring/domains.conf
# (or TALER_DOMAINS_CONF). Each profile names the three public endpoints.
#
# CLI still wins after profile load:
#   --bank URL  --exchange URL  --merchant URL  --currency CODE
# Env: BANK_PUBLIC EXCHANGE_PUBLIC MERCHANT_PUBLIC EXPECT_CURRENCY
#
# Unknown domains fall back to heuristics (see apply_taler_domain).
# ---------------------------------------------------------------------------

_MONITOR_LIB_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
: "${TALER_DOMAINS_CONF:=${_MONITOR_LIB_DIR}/domains.conf}"

# host_or_url → https://… (no trailing slash)
_to_https_base() {
  local x="${1%/}"
  case "$x" in
    https://*|http://*) printf '%s' "$x" ;;
    "") printf '' ;;
    *) printf 'https://%s' "$x" ;;
  esac
}

# 1 = check GOA-style /intro landing pages (assets, link crawl, demo-withdraw).
# 0 = skip (e.g. taler-ops.ch / mytops — no public landings).
: "${CHECK_LANDING:=1}"

# Declare bank + exchange + merchant (+ currency, local stack, landing, domain id).
# Usage:
#   set_taler_stack BANK EXCHANGE MERCHANT [CURRENCY] [LOCAL 0|1] [LANDING 0|1] [TALER_DOMAIN]
# BANK/EXCHANGE/MERCHANT: hostname or full URL
set_taler_stack() {
  local bank="${1:-}" exchange="${2:-}" merchant="${3:-}"
  local currency="${4:-}" local_stack="${5:-0}" landing="${6:-}" domain_id="${7:-}"

  BANK_PUBLIC=$(_to_https_base "$bank")
  EXCHANGE_PUBLIC=$(_to_https_base "$exchange")
  MERCHANT_PUBLIC=$(_to_https_base "$merchant")
  [ -n "$currency" ] && EXPECT_CURRENCY="$currency"
  LOCAL_STACK="$local_stack"
  if [ "$LOCAL_STACK" = "1" ]; then
    SKIP_SSH=0
  else
    SKIP_SSH=1
  fi
  # default: landings only matter on local GOA stack
  if [ -n "$landing" ]; then
    CHECK_LANDING="$landing"
  elif [ "$LOCAL_STACK" = "1" ]; then
    CHECK_LANDING=1
  else
    CHECK_LANDING=0
  fi
  [ -n "$domain_id" ] && TALER_DOMAIN="$domain_id"

  BANK_PUBLIC=${BANK_PUBLIC%/}
  EXCHANGE_PUBLIC=${EXCHANGE_PUBLIC%/}
  MERCHANT_PUBLIC=${MERCHANT_PUBLIC%/}
}

# Load first matching profile from domains.conf.
# Fields (whitespace-separated; # comments; blank lines ignored):
#   name  bank  exchange  merchant  currency  local[0|1]  landing[0|1]  [canonical_domain]
# Returns 0 if found, 1 if not.
load_domain_profile() {
  local want="$1" conf="${TALER_DOMAINS_CONF:-}"
  local line name bank exchange merchant currency local_stack landing canon
  [ -n "$want" ] || return 1
  [ -n "$conf" ] && [ -f "$conf" ] || return 1

  while IFS= read -r line || [ -n "$line" ]; do
    line="${line%%#*}"
    # shellcheck disable=SC2086
    set -- $line
    [ $# -ge 5 ] || continue
    name="$1"
    [ "$name" = "$want" ] || continue
    bank="$2"
    exchange="$3"
    merchant="$4"
    currency="$5"
    local_stack="${6:-0}"
    landing="${7:-}"
    canon="${8:-$name}"
    # Backward compat: old 7th field was canonical domain (contains a dot)
    if [ -n "$landing" ] && [[ "$landing" == *.* && "$landing" != "0" && "$landing" != "1" ]]; then
      canon="$landing"
      landing=""
    fi
    set_taler_stack "$bank" "$exchange" "$merchant" "$currency" "$local_stack" "$landing" "$canon"
    return 0
  done <"$conf"
  return 1
}

_normalize_domain() {
  local d="$1"
  d="${d#https://}"
  d="${d#http://}"
  d="${d%%/*}"
  d="${d%%:*}"
  # Strip service host prefix only if a real domain remains (has a dot).
  # e.g. bank.demo.taler.net → demo.taler.net, taler.hacktivism.ch → hacktivism.ch
  # but NOT taler.net → net
  case "$d" in
    bank.*|exchange.*|taler.*|backend.*|merchant.*|shop.*|libeufin.*|my.*|map.*)
      rest="${d#*.}"
      if [[ "$rest" == *.* ]]; then
        d="$rest"
      fi
      ;;
  esac
  printf '%s' "$d"
}

_probe_https_config() {
  # 0 if https://$1/config returns 200
  local host="$1" code
  code=$(curl -skS --max-redirs 0 -m 4 -o /dev/null -w '%{http_code}' "https://${host}/config" 2>/dev/null || echo 000)
  [ "$code" = "200" ]
}

apply_taler_domain() {
  local raw="${1:-}"
  local d
  [ -n "$raw" ] || return 0
  d=$(_normalize_domain "$raw")
  TALER_DOMAIN="$d"

  # 1) Explicit profile (domains.conf) — preferred way to add stacks
  if load_domain_profile "$d" || load_domain_profile "$raw"; then
    # Optional tiny defaults for e2e ladders by currency
    case "${EXPECT_CURRENCY:-}" in
      GOA)
        : "${WITHDRAW_AMT:=GOA:20}"
        : "${PAY_AMT:=GOA:0.01}"
        : "${CREDIT_AMT:=GOA:400}"
        ;;
      KUDOS|TESTKUDOS)
        MERCHANT_INSTANCE="${MERCHANT_INSTANCE:-sandbox}"
        WITHDRAW_AMT="${WITHDRAW_AMT:-${EXPECT_CURRENCY}:20}"
        PAY_AMT="${PAY_AMT:-${EXPECT_CURRENCY}:0.01}"
        CREDIT_AMT="${CREDIT_AMT:-${EXPECT_CURRENCY}:100}"
        ;;
      CHF)
        WITHDRAW_AMT="${WITHDRAW_AMT:-CHF:20}"
        PAY_AMT="${PAY_AMT:-CHF:0.01}"
        CREDIT_AMT="${CREDIT_AMT:-CHF:100}"
        ;;
    esac
  else
    # 2) Unknown domain — heuristics only (prefer profile in domains.conf)
    #    Override: --bank / --exchange / --merchant / --currency
    #    Do not keep default GOA: empty currency = report only, no hard fail.
    BANK_PUBLIC="https://bank.${d}"
    EXCHANGE_PUBLIC="https://exchange.${d}"
    # TOPS-style multi-tenant merchant first, then legacy names
    MERCHANT_PUBLIC="https://my.${d}"
    EXPECT_CURRENCY=""
    LOCAL_STACK=0
    SKIP_SSH=1
    CHECK_LANDING=0
    if [ "${TALER_DOMAIN_PROBE}" = "1" ]; then
      local h
      for h in "backend.${d}" "my.${d}" "taler.${d}" "merchant.${d}" "shop.${d}"; do
        _probe_https_config "$h" && { MERCHANT_PUBLIC="https://$h"; break; }
      done
      for h in "bank.${d}" "libeufin.${d}"; do
        _probe_https_config "$h" && { BANK_PUBLIC="https://$h"; break; }
      done
      _probe_https_config "exchange.${d}" || true
    fi
  fi

  BANK_PUBLIC=${BANK_PUBLIC%/}
  EXCHANGE_PUBLIC=${EXCHANGE_PUBLIC%/}
  MERCHANT_PUBLIC=${MERCHANT_PUBLIC%/}

  # Hard rule: only the local koopa/hacktivism stack may use SSH
  if [ "${LOCAL_STACK}" != "1" ]; then
    SKIP_SSH=1
  fi
}

# Apply TALER_DOMAIN from env once (CLI exports TALER_DOMAIN_APPLIED=1 after overrides).
if [ "${TALER_DOMAIN_APPLIED:-0}" != "1" ] \
  && [ -n "${TALER_DOMAIN:-}" ] && [ "${TALER_DOMAIN}" != "hacktivism.ch" ]; then
  apply_taler_domain "$TALER_DOMAIN"
  TALER_DOMAIN_APPLIED=1
fi

# Safe SSH: publickey only, short connect, overall alarm so we never block forever.
SSH_BASE_OPTS=(
  -o BatchMode=yes
  -o ConnectTimeout="${SSH_CONNECT_TIMEOUT}"
  -o ConnectionAttempts=1
  -o ServerAliveInterval=3
  -o ServerAliveCountMax=2
  -o StrictHostKeyChecking=accept-new
  -o PreferredAuthentications=publickey
  -o PasswordAuthentication=no
  -o KbdInteractiveAuthentication=no
  -o GSSAPIAuthentication=no
  -o NumberOfPasswordPrompts=0
)

# Hard wall-clock timeout so ssh/curl never block the monitoring run forever.
with_timeout() {
  local secs="$1"; shift
  if command -v gtimeout >/dev/null 2>&1; then
    gtimeout --kill-after=2 "$secs" "$@"
    return $?
  fi
  if command -v timeout >/dev/null 2>&1; then
    timeout -k 2 "$secs" "$@" 2>/dev/null || timeout --kill-after=2 "$secs" "$@"
    return $?
  fi
  # Portable: perl alarm + process group kill
  perl -e '
    use strict; use warnings;
    my $secs = shift @ARGV;
    my $pid = fork();
    die "fork: $!" unless defined $pid;
    if ($pid == 0) {
      setpgrp(0, 0);
      exec @ARGV;
      exit 127;
    }
    $SIG{ALRM} = sub {
      kill "TERM", -$pid;
      select(undef, undef, undef, 1.0);
      kill "KILL", -$pid;
      exit 124;
    };
    alarm $secs;
    waitpid($pid, 0);
    my $code = $? >> 8;
    alarm 0;
    exit $code;
  ' "$secs" "$@"
}

# Probe: 0 if koopa SSH works quickly
koopa_ssh_ok() {
  [ "${SKIP_SSH}" = "1" ] && return 1
  with_timeout $((SSH_CONNECT_TIMEOUT + 3)) \
    ssh "${SSH_BASE_OPTS[@]}" "${KOOPA_SSH}" 'echo ok' >/dev/null 2>&1
}

# Run remote bash -s with optional stdin script; hard-capped
# usage: koopa_ssh_bash [timeout_secs] <<'EOF' ... EOF
# or:    koopa_ssh_run timeout_secs 'remote command'
koopa_ssh_run() {
  local t="${1:-$SSH_CMD_TIMEOUT}"
  shift
  with_timeout "$t" ssh "${SSH_BASE_OPTS[@]}" "${KOOPA_SSH}" "$@"
}

koopa_ssh_bash() {
  local t="${1:-$SSH_CMD_TIMEOUT}"
  with_timeout "$t" ssh "${SSH_BASE_OPTS[@]}" "${KOOPA_SSH}" 'bash -s'
}

# ANSI colours for tags (green OK / yellow WARN / red ERROR·BLOCKER / cyan INFO).
# Default: always on so pasted ```bash``` logs keep visible tags when the terminal
# supports colour. Disable: NO_COLOR=1. Force off for dumb pipes: CLICOLOR=0.
if [ "${NO_COLOR:-0}" = "1" ] || [ "${CLICOLOR:-1}" = "0" ]; then
  G= R= Y= C= N= B=
else
  G=$'\e[1;32m'   # bold green  [OK]
  R=$'\e[1;31m'   # bold red    [ERROR] [BLOCKER]
  Y=$'\e[1;33m'   # bold yellow [WARN]
  C=$'\e[1;36m'   # bold cyan   [INFO]
  B=$'\e[1m'
  N=$'\e[0m'
fi

PASS_N=0
FAIL_N=0
WARN_N=0
INFO_N=0
BLOCKERS=()   # human-readable payment/withdraw blockers
ERRORS=()     # all ERROR lines (component scope)

# Test IDs by area: www-001, e2e-001, inside-001, …
# Usage: set_area www   then each ok/fail/warn/info/blocker/err auto-numbers.
TEST_AREA=""
TEST_N=0
# Last issued id (www-001); set by _take_tid — not via $(…) so TEST_N persists.
LAST_TID=""
set_area() {
  TEST_AREA="$1"
  TEST_N=0
  LAST_TID=""
}
# Assign next id into LAST_TID (must not run in a subshell).
_take_tid() {
  LAST_TID=""
  if [ -z "${TEST_AREA:-}" ]; then
    return
  fi
  TEST_N=$((TEST_N + 1))
  LAST_TID=$(printf '%s-%03d' "$TEST_AREA" "$TEST_N")
}
_fmt_tid() {
  # prefix "www-001  " or empty
  if [ -n "${LAST_TID:-}" ]; then
    printf '%s  ' "$LAST_TID"
  fi
}

ok() {
  local label="$1" detail="${2:-}"
  _take_tid
  if [ -n "$detail" ]; then
    printf '%s[OK]%s    %s%s — %s\n' "$G" "$N" "$(_fmt_tid)" "$label" "$detail"
  else
    printf '%s[OK]%s    %s%s\n' "$G" "$N" "$(_fmt_tid)" "$label"
  fi
  PASS_N=$((PASS_N + 1))
}
# component-scoped error: err bank "libeufin down" "detail"
err() {
  local comp="$1" msg="$2" detail="${3:-}"
  _take_tid
  printf '%s[ERROR]%s %s%s: %s%s\n' "$R" "$N" "$(_fmt_tid)" "$comp" "$msg" "${detail:+ — $detail}"
  FAIL_N=$((FAIL_N + 1))
  ERRORS+=("${LAST_TID:+$LAST_TID }[$comp] $msg${detail:+ — $detail}")
}
# legacy fail label ...
fail() {
  local label="$1" detail="${2:-}"
  _take_tid
  printf '%s[ERROR]%s %s%s%s\n' "$R" "$N" "$(_fmt_tid)" "$label" "${detail:+ — $detail}"
  FAIL_N=$((FAIL_N + 1))
  ERRORS+=("${LAST_TID:+$LAST_TID }$label${detail:+ — $detail}")
}
warn() {
  local label="$1" detail="${2:-}"
  _take_tid
  printf '%s[WARN]%s  %s%s%s\n' "$Y" "$N" "$(_fmt_tid)" "$label" "${detail:+ — $detail}"
  WARN_N=$((WARN_N + 1))
}
info() {
  local label="$1" detail="${2:-}"
  _take_tid
  if [ -n "$detail" ]; then
    printf '%s[INFO]%s  %s%s — %s\n' "$C" "$N" "$(_fmt_tid)" "$label" "$detail"
  else
    printf '%s[INFO]%s  %s%s\n' "$C" "$N" "$(_fmt_tid)" "$label"
  fi
  INFO_N=$((INFO_N + 1))
}
blocker() {
  # Payment/withdraw path cannot proceed because of this
  local step="$1" msg="$2"
  _take_tid
  printf '%s[BLOCKER]%s %s%s: %s\n' "$R$B" "$N" "$(_fmt_tid)" "$step" "$msg"
  BLOCKERS+=("${LAST_TID:+$LAST_TID }[$step] $msg")
  FAIL_N=$((FAIL_N + 1))
  ERRORS+=("BLOCKER ${LAST_TID:+$LAST_TID }[$step] $msg")
}
section() { printf '\n%s== %s ==%s\n' "$B" "$*" "$N"; }

summary() {
  echo ""
  if [ "${#BLOCKERS[@]}" -gt 0 ]; then
    printf '%s--- BLOCKERS (fix/withdraw path) ---%s\n' "$R$B" "$N"
    local b
    for b in "${BLOCKERS[@]}"; do
      printf '%s  • %s%s\n' "$R" "$b" "$N"
    done
  fi
  if [ "${#ERRORS[@]}" -gt 0 ] && [ "${#BLOCKERS[@]}" -lt "${#ERRORS[@]}" ]; then
    printf '%s--- ERRORS ---%s\n' "$R" "$N"
    local e
    for e in "${ERRORS[@]}"; do
      case "$e" in BLOCKER*) continue ;; esac
      printf '%s  • %s%s\n' "$R" "$e" "$N"
    done
  fi
  printf 'totals: %s%d OK%s' "$G" "$PASS_N" "$N"
  [ "$FAIL_N" -gt 0 ] && printf ', %s%d ERROR%s' "$R" "$FAIL_N" "$N"
  [ "$WARN_N" -gt 0 ] && printf ', %s%d WARN%s' "$Y" "$WARN_N" "$N"
  [ "$INFO_N" -gt 0 ] && printf ', %d INFO' "$INFO_N"
  [ "${#BLOCKERS[@]}" -gt 0 ] && printf ', %s%d BLOCKER%s' "$R" "${#BLOCKERS[@]}" "$N"
  printf '\n'
  [ "$FAIL_N" -eq 0 ]
}

http_code() {
  local url="$1"; shift
  curl -skS --max-redirs 0 -m "${TIMEOUT}" -o /dev/null -w '%{http_code}' "$@" "$url" 2>/dev/null || echo 000
}

http_body() {
  local url="$1" out="$2"; shift 2
  curl -skS --max-redirs 0 -m "${TIMEOUT}" -o "$out" -w '%{http_code}' "$@" "$url" 2>/dev/null || echo 000
}

# ---------------------------------------------------------------------------
# Currency unit map checks (wallet codec: alt_unit_names must include "0")
# ---------------------------------------------------------------------------
# Returns 0 if JSON body at $1 has usable alt_unit_names.
# Supports:
#   - exchange/bank: currency_specification.alt_unit_names
#   - merchant: currencies.<CODE>.alt_unit_names for each code
# Optional $2 = required currency code for currency_specification.currency
json_has_alt_unit_names() {
  local file="$1" want_cur="${2:-}"
  python3 - "$file" "$want_cur" <<'PY'
import json, sys
path, want = sys.argv[1], sys.argv[2]
try:
    d = json.load(open(path))
except Exception as e:
    print(f"json-error: {e}")
    sys.exit(2)

def check_au(au, label):
    if not isinstance(au, dict) or not au:
        print(f"{label}: missing/empty alt_unit_names")
        return False
    if "0" not in au or not str(au.get("0") or "").strip():
        print(f"{label}: alt_unit_names missing non-empty key \"0\" (have {sorted(au.keys())})")
        return False
    print(f"{label}: alt_unit_names ok (0={au.get('0')!r}, n={len(au)})")
    return True

ok = True
cs = d.get("currency_specification")
if isinstance(cs, dict):
    if want and cs.get("currency") and cs.get("currency") != want:
        print(f"currency_specification.currency={cs.get('currency')!r} want {want!r}")
        ok = False
    if not check_au(cs.get("alt_unit_names"), "currency_specification"):
        ok = False
elif "currency_specification" in d:
    print("currency_specification: not an object")
    ok = False

curs = d.get("currencies")
if isinstance(curs, dict) and curs:
    for code, spec in curs.items():
        if not isinstance(spec, dict):
            print(f"currencies.{code}: not an object")
            ok = False
            continue
        if not check_au(spec.get("alt_unit_names"), f"currencies.{code}"):
            ok = False

if not isinstance(cs, dict) and not (isinstance(curs, dict) and curs):
    # neither shape — fail
    print("no currency_specification or currencies map")
    ok = False

sys.exit(0 if ok else 1)
PY
}

# Check one exchange base URL's /config for alt_unit_names.
# $1=label $2=base_url $3=expected currency (optional) $4=strict(1) or soft(0)
check_exchange_alt_units() {
  local label="$1" base="$2" want_cur="${3:-}" strict="${4:-1}"
  local f code
  base="${base%/}"
  f=$(mktemp)
  code=$(http_body "${base}/config" "$f")
  if [ "$code" != "200" ]; then
    rm -f "$f"
    if [ "$strict" = "1" ]; then
      fail "$label /config" "HTTP $code ($base)"
    else
      warn "$label /config" "HTTP $code ($base)"
    fi
    return
  fi
  local out ec
  set +e
  out=$(json_has_alt_unit_names "$f" "$want_cur" 2>&1)
  ec=$?
  set -e
  rm -f "$f"
  if [ "$ec" -eq 0 ]; then
    ok "$label alt_unit_names" "$(echo "$out" | tr '\n' '; ' | sed 's/; $//')"
  else
    if [ "$strict" = "1" ]; then
      fail "$label alt_unit_names" "$(echo "$out" | tr '\n' '; ' | sed 's/; $//')"
    else
      warn "$label alt_unit_names" "$(echo "$out" | tr '\n' '; ' | sed 's/; $//')"
    fi
  fi
}

# From merchant /config JSON file: walk exchanges[] and check each base_url/config.
# Local stack hosts (hacktivism.ch or $EXCHANGE_PUBLIC host) are strict; others soft.
check_merchant_listed_exchanges_alt_units() {
  local mer_json="$1"
  local list
  list=$(python3 - "$mer_json" <<'PY'
import json, sys
d = json.load(open(sys.argv[1]))
for e in d.get("exchanges") or []:
    if not isinstance(e, dict):
        continue
    u = (e.get("base_url") or e.get("url") or "").rstrip("/")
    c = e.get("currency") or ""
    if u:
        print(f"{c}\t{u}")
PY
)
  if [ -z "$list" ]; then
    fail "merchant exchanges[]" "empty — no exchanges to check for alt_unit_names"
    return
  fi
  local line cur url strict host
  while IFS=$'\t' read -r cur url; do
    [ -n "$url" ] || continue
    host="${url#https://}"; host="${host#http://}"; host="${host%%/*}"
    strict=1
    case "$host" in
      *hacktivism.ch) strict=1 ;;
      *)
        # foreign exchange (e.g. taler-ops) — soft unless it is our configured EXCHANGE_PUBLIC
        if [ "$url" = "${EXCHANGE_PUBLIC}" ] || [ "$url" = "${EXCHANGE_PUBLIC}/" ]; then
          strict=1
        else
          strict=0
        fi
        ;;
    esac
    check_exchange_alt_units "exchange ${cur:-?} ${host}" "$url" "$cur" "$strict"
  done <<<"$list"
}

SECRETS_ROOT="${SECRETS_ROOT:-}"
if [ -z "$SECRETS_ROOT" ]; then
  for d in \
    "$(cd "$(dirname "${BASH_SOURCE[0]}")/../../.." && pwd)/koopa-admin-secrets/koopa/host-root" \
    "/Users/newkamek/src/koopa/koopa-admin-secrets/koopa/host-root" \
    "$HOME/src/koopa/koopa-admin-secrets/koopa/host-root"
  do
    if [ -d "$d/taler-bank" ]; then SECRETS_ROOT=$d; break; fi
  done
fi

read_secret() {
  local rel="$1"
  if [ -n "${SECRETS_ROOT:-}" ] && [ -f "${SECRETS_ROOT}/${rel}" ]; then
    tr -d '\n' <"${SECRETS_ROOT}/${rel}"
    return 0
  fi
  koopa_ssh_ok || return 1
  koopa_ssh_run 10 "tr -d '\\n' </root/$(basename "$rel") 2>/dev/null || true" 2>/dev/null
}

find_wallet_cli() {
  # Must return a path suitable for: node "$WALLET_CLI" …
  # Prefer *.mjs / bundled entry; plain /usr/bin/taler-wallet-cli is often a
  # shell wrapper and cannot be passed to node.
  if [ -n "${WALLET_CLI:-}" ] && [ -f "$WALLET_CLI" ]; then
    echo "$WALLET_CLI"; return 0
  fi
  local c cand
  for c in \
    "${HOME}/.local/bin/taler-wallet-cli.mjs" \
    "${HOME}/taler/opt/taler-wallet-cli/usr/lib/taler-wallet-cli/node_modules/taler-wallet-cli/bin/taler-wallet-cli.mjs" \
    /home/hernani/taler/opt/taler-wallet-cli/usr/lib/taler-wallet-cli/node_modules/taler-wallet-cli/bin/taler-wallet-cli.mjs \
    /Users/newkamek/src/taler/taler-typescript-core/packages/taler-wallet-cli/bin/taler-wallet-cli.mjs \
    /usr/lib/taler-wallet-cli/node_modules/taler-wallet-cli/bin/taler-wallet-cli.mjs \
    /usr/share/taler-wallet-cli/bin/taler-wallet-cli.mjs
  do
    [ -n "$c" ] && [ -f "$c" ] && { echo "$c"; return 0; }
  done
  # Debian package wrapper → resolve real .mjs
  cand=$(command -v taler-wallet-cli 2>/dev/null || true)
  if [ -n "$cand" ] && [ -f "$cand" ]; then
    if head -1 "$cand" 2>/dev/null | grep -q 'node\|mjs'; then
      # shebang node script or .mjs
      echo "$cand"; return 0
    fi
    # follow symlink into package tree
    if [ -L "$cand" ]; then
      c=$(readlink -f "$cand" 2>/dev/null || true)
      [ -n "$c" ] && [ -f "$c" ] && { echo "$c"; return 0; }
    fi
  fi
  return 1
}