Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 73311fb99eb7070579bfafdbf784714f0e5f3f47e3c0e1dfba63ae34d850e871:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^