Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> efa0e2459223503afbe62eddfc2e24a321de3591db800de9c5cff5733c9fedf9:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^