Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> aef4b479c6b616bcf06b4da265272683bec0df876c2b89491d8c41db519880a9:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^