Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 6ece9a7436c70a499a0c545f2d21ded1c80e5a307df6db405a9c7b8554a268b1:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^