Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4f24b4f1ec5c9cc3180e8721608b929105c4eb7c40eebc69ddcd1139e8513475:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^