Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> bc92fca39bda77f1a7510a82423973c7a5b90589b91bbc62c1eb9e37bf0776f0:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^