Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 209e4748d89f6d32000dfa0f1d7a1858c2ede0373007a923d1e431731eaca250:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^