Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c8e70f3adf49e8f9e5b6b82196ebe9f96b20f7550cae6e72ea4b788c44343723:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^