Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ca1bdbeeea001c482d6d3453eb50fcbf7f54a892b19de88794e7f1c1a83581c2:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^