Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c128a6d6e58cf25916e5aa6a3ac53485ed049655746b0b458327e00e157e41ce:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^