Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 08c38d5de8050f347b0119d62aeca7cbcc973a41b79dba1a528d22a42ac1fa28:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^