Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 00eef6d5215ffd37b0c7c3152578a8b4a7ee22561bb72cdca7ac1357364387e0:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^