Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3456e897cbdecd0962cf0bedbe7c4ae451e98ee99b5608262dc1214374de3a0f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^