Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0f57ad88ced82a4386b9ac40f53c19053c13c66d506963c404d1f5b14c1e921c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^