Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 32c8ce6cee7bbf46e7db52c0f081b4dfddf523d9dccc0df32edaa1dd85445c02:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^