Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 349ea9f92284d8a688dfa127c42ce8cc3013c9d9b70bc250eb332d917f10a1ae:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^