Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 35af0635cf0bae524d37b572b56d06e8a6100ba2b28eda44f94a0f8702a2e6c0:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^