Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ed10505b99e300ef93f3bf773a7112a3539a5119da40ec958b51f3b1f1fb2e36:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^