Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c045766165f9cc8218d22d93ebe57457f9f237d405c64aed93e190afa5b7dcf9:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^