Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> db1d1e3a047488a3e648a5dc4532977db563f46917b05b8295958396ab1ce69d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^