Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c04dda68a1c0f9874311bd55b7abb1ab6f1404e26c3802d2b2e2daa6c25c7056:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^