Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 94c2e7a7624e9d8c97ae90c4ba018105f2c640aa08295a970ebf2fd5b72014bd:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^