Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b36e301220283b33a7301649cec3fa67d62bd2ab0a2960cb87a09cb45c718d5c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^