Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c86f32778dd479e6cbe4b6aececc59bf6302be8d0e4f1c2c6e9599bcb682950b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^