Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 460628bdca949a6807d28b6c46ad97b5d4eb77eb199f4f3b55952a5341cdb019:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^