Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4590478fd7fd8a72c93792047f52d19f6c338f2c147654353a7e2b5b9df0febc:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^