Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1dc1f33f9c737cc9544f9b9a610b388db2b0c99da8ab04adf23064ce51912288:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^