Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 424895fe1e6a1e29d1cc9682b2167411076a04efdcfd6cc4eccf0c08bea0ec86:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^