Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5356781aa9dc86f992c25b928ca5d6008ea8e48d0273e2febf3aedb914111d2a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^