Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 77c8a098230f0c04b391aff65c56ac1c2709334164c80b4683264b61a01f3449:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^