Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 8f28dc504f047ae16856a1a66537cba5bffac8bb355c0ba22f9bb49576d7e0b9:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^