Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 609fb3e58af614b81deef1e66c4811aa2eae38c4e9a300e1798dc525e3634a1e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^