Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 702bb878a0189409c6331e1d2dc869bf0bc06b6a5a2fa583c46fa3ed8d46ef65:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^