Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a3b03a384923dd62d64862d855ea92a2431bdacb9804e500f619d596c30d3111:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^