Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 097ff9b22a1ff7baf2c59d51e3205c54190c5c94dbc48c1b9bbc2cc010db3849:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^