Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 31fb12638b4b3bf0aea2923a88a581e29c2504c6a44b85d333b241db15a2797a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^