Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 83c6287cbd53f7ed6eab527fa2aea0f8a49a5a59cb4c80cacc052a68c7f3913a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^