Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 8c09be5958069001e28cb5ba5de368d9299f6d31a9656abd79b053bf6fa8360b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^