Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 507aed8c80d96ef946635bbaed0568254fddba37473171dff2d6c70b46af2922:15:8
   |
15 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^