Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 11f86343b943ba4af4aec445ffd5236726bb2fe660cd584f6e7322d4f4fc5935:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^