Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4e7722b6f362ae5dc2c288746d60654243d7fbb38ced2a48b418f90e9835a0b7:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^