Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 13cf072e61e9eb722be7766111f0d799b309d7846c2b8530595efd75abd1f59c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^