Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4dad33c82ac8c98efbc406f4f11c2763ae97f568c3359479c9c1567a50b1711f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^