Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 8a971bbf705ce43f4ae38beefb0ecd748343d4374878f6ddb7810856e5cd3f52:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^