Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 17194077cbdfeb1c41eca1b60d09f8cc7b6a9fbf6995c8a2e26b75a026d60534:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^