Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b104b17e0e76c56968c61dec87f1d61a22dd66266c16b126fd99d65f8f00efc1:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^