Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 6c86b7cfd9a1941b373d964046dd5da293a8e299364bbba94cde7aaa8bc787f9:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^