Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e9b90191b0b8532c89ce65866f3f9d2b5b71388b9fd0c9bebeb493cdc7a44434:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^