Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 133bf07e98d787cac195b5dd671673fc53655173646fbe14bb18b9ee5e70aa4c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^