Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 75a0a39e5fc20e219b68ea1366f04a4653331a91339ed4b54148f1219d54904b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^