Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> cab002249428acf3680eacdb45f87b62d827ccd6e0fc76b318ed6621e855f18b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^