Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 451805858a29c4a898aad69096e492bbc18b6fdfc21c4392710665bcea668624:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^