Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3645cc3a2c44cbe872ac7e8671a6801f3ca3aee2737a6b910032fcb97c1b67b1:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^