Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4af10c60b09806972c1d8a7884e474e9b451a99e63f7ac36712024863bb9d21e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^