Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 333a666dbeea8ea11cff84f3e7a08838cb4948a8d7de5987adc699b866d656c7:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^