Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 788f0f4f2fdeef69635fb4307376d3160fbd48341ab17fb564a8b4ac6108fe98:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^