Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e1e0eb2fda554adcfc3dbd86da4dcdebccfcec9dd8248bc1755877a50d2af86d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^