Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e5aaa4dbba67f58e473fd199bb3ad373818ffa4831e77a14156dbf48b90a8dc4:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^