Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9dfb881b47dcf344cbb33e4c68d3cea14b503d470a29c60837fa7dcc61034e45:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^