Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b30d9e16f56df7665cefb3f94cf2fdd5acaab7ce8f52accdb149c06ad73a8136:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^