Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4540270252c1f2cc98d5daf9803bf0073b2406cf15e9682fa79a1552c21ddfc0:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^