Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a65b96e45aa0ce94610268be2f56bcb15702e3a53f3d9e32b4c822d264a19cce:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^