Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> dd1d06ad524fa7e239a9b05abe72d0e45aaea606582ab745cffab5ddc81aea5b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^