Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 91b8699a39b48916b5f36b34b10f1ddf97556b0f751e16e0d5c3b499d7b49a76:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^