Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4f5133aa7dc7d54ae7e3ff1c8b086c50189e881ba1752a0cb5640ba416d06139:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^