Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 6ec30ee911d0202ad1351d1abadf0630aada44c0d1040962a79288f8b5b05bff:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^