Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 427daab18ca8a41d77efd2c481c3a5771c2fd5467cfbd06f3b1df770448fa0e6:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^