Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3bfe0d6e73b99c4d17816805695d568b316b1371509bb35d0d7793a4986c11ab:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^