Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 7688f911587455555839b9bcc3e14c2c64f3ace7477305319013e0c79b3c6b40:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^