Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c6410d254d99b64a207a71de2ee16b131bc450cd1c0bf34b9fb165b512ece4c7:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^