Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ddc517a50067b91292f95f340f55fc282aef8993ea85b177cf7c283ade43878f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^