Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> af6daf2d1d99b154c9ee5cd1257aab0157aa1c97bb9ab31569837480a88d5350:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^