Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 15033ea3a94652080bc7a6d4df00202916a12f2872ae06de4ae4bc014ac4cd8f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^