Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4f442d836c557371ce28b2f50240ad5c0adb099e5d58d95157649788f8e4ae78:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^