Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3a4ec6994f16007b796fac8995932d42a3509348fc723ce0adf0aa56ee69b144:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^