Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 23dc005dd2d3621caed48893f6e31203f3d4563244c046d8912a11330443d3ff:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^