Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e6cc64dc61b56a9472c041a3314ad89b549bbea4e7a2b3823df23e9edaaf1457:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^