Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ed06058e63f00a369e2300fdf45b0e7e3d26780b03339b1b0c078b9a5ddbeb42:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^