Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d5b5afe2c8180dd996856f1b7524bef7c9837a22119d097022f12d13f2c0d34e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^