Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 64b9bf01b68b799f834eb15b5fceffbc420dd16b352d20ddbbd01d49822a7410:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^