Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c3f3bb01958e918d6efcdcaa1ff9af42929903ba18fec9add3f22532bb3741a7:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^