Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c4ec252664e9c3c551873e7b26846bce04619d8c41d5e22071fec192da30bfba:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^