Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0e4cc3b44aa6d0751957077fd6be919359a6b2718593d480e5b03d765eaba2d6:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^