Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c3faad4431525d4f0188d70e69dbcbdf6d177465c4ca13b913519a50d5b73f1f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^