Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> fa6c5878ff92297e925d6edde7c42b22b56a957996f644d47bf74e0b20daf29a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^