Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 40d82b40fcb240fdf12bd680780c13cb87ae0fd739d81b215b09c79b7cdb59af:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^