Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> fad826273696d0846742e17f2160bd6ff2eb58aedef682170a1f178e9d17cb6e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^