Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5df7bd6f4d1b79913e494b26711fc311f89a92cf49cb1699b4e823c0c5543567:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^