Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> f73dae3f86d10cd0d156d176b9b83190982306759db364e2a2317ce84b9ba789:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^