Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 640429b162dcb3f09581ef449e7e046a5e3ae8ae7cc4b10ae8e7651233f98279:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^