Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ade3d43c0e8aaf8b2176ae39ea57cd87bd7fb8f853fd11fb1328cbd973704456:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^