Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 07875e62cc6c9addbba18e0eedd5b7959e7fa88f68d7a120ff2c86b6c8f54eda:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^