Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 169418df9468f136ed32da77c4321d699547dba88881bf5e6e997eca1f9b6b2c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^