Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 537aaaaf90d82d0d3373fc8b0e9c54487e130158de0f54b889ea3305c855ef69:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^