Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 8b8f17b58eee6638438554d22f319f8ded221b89c63034711a075558b4966f60:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^