Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 76371c577e770119dcb7835f79086190ad6f89fbe7a0a73ff98427efe0a728ce:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^