Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b840af3be75780e5f96e3fe0e82a7f6e1e97794086f4476e09e2a40285040b36:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^