Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 955e16033d13f35b2565fec00483aa66e3b1ba5c12d0f4db95ca89bbd298afc3:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^