Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 76c3080c1a1c36aacf2f410b3aa554952c727ab6c263e67dd8f87d0b0027a7fb:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^