Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0ebc7a4431abb63475684ed1390392f1263a4e43001aba551396edc0218fb13b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^