Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0b9e76b3b841dac351eccc454f92bea6c65eab34fdf50290c279f7d9d84ee4a8:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^