Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> dded2ae2f491bac7921d0b9df7846574a3246cac0e3055c832989b24bf882f5f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^