Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 917359c35fd8ec7658f671ae817cfa39981ae8747850a614e616dd0d63b9e3be:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^