Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> dd1f08e0292fc797a410624efeafc992a2f392db9d8f2131a8a85038170ac70e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^