Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b3588e750501a2c6e87bda9778af0fed577fee88c11642345046292d93e98a22:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^