Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 55cfbea9159b89bc90fec52085305fec47821efb2423270ce01b3d4e19d3a8bc:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^