BODY='{"card_identifier":"OLIV0001"}'
TIMESTAMP='2026-03-10T12:00:00Z'
SIGNATURE=$(printf 'POST\n/api/v1/payment/lookup-card\n%s\n%s' "$TIMESTAMP" "$BODY" | openssl dgst -sha256 -hmac "$OLIVE_HMAC_SECRET" -hex | sed 's/^.* //')

curl -X POST "https://olive-gateway-a6ba.onrender.com/api/v1/payment/lookup-card" \
  -H "X-API-Key-ID: $OLIVE_API_KEY_ID" \
  -H "X-Timestamp: $TIMESTAMP" \
  -H "X-Signature: $SIGNATURE" \
  -H "Content-Type: application/json" \
  -d "$BODY"

{
  "success": true,
  "message": "Card found",
  "card_serial": "OLIV0001",
  "card_type": "PARENT",
  "status": "ACTIVE",
  "holder_name": "John Doe",
  "holder_phone": "+23277123456",
  "balance": "48,500.00 SLE"
}