Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b3f849ef299aca7265536f1351a86066bba42a392d899849ced0ecb5ee4ca478:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^