Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 2c40adb22a39280142e001deb589c14f088c527218f72ba4475914d02780a2e2:16:32
   |
16 |                                 let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^