Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d6f482bd4aa37cc0403d395a407cb2fa7fd5900208ce965445dccdc2d76c8924:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^