Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c975dde0afbfbeac5b9ab7c029cc90edbd5fc11761845b3ceecc0fac58037671:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^