Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d88e93abbea0338da41c78616d2a5158835d1022be3f464ae3a7288f007e6616:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^