Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 40ec788fd168261015f6d61a10b6527e66a41f56ae08f7c728daf2a5fba3ac3d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^