Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e87de33613822b64b850599aa3d7cd46995028485d9553303e7ec1d3d6919813:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^