Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a5e3a3fd777425f8b2a12348322c6bdcbb45371de00c21a4fc64fad6565de2bb:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^