Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5a7e336d2199c5c66b167723ab114eedfd86d3f65c453568bbc22f95dcd462eb:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^