Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 17230132ac1cc7f17c4d851b4c20cc4d7d81a5ae9625fc51486760bd044d12f8:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^