Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1cb44a6c7a32a5cf05142166ebef5f269a5d87b98dcfa1761c676c644248e2ef:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^