Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 73c75c1a4461bed06b22ae43f6e51813d6c855684466b89565069f791714399c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^