Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 2b9c8ef54f01574ad8896f76b5ceebbf62eaefe3c839b7b57627d1895b948b63:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^