Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 89f8b4fe002efaf350600e424f9c820f413f8b184975579b1d701ebfcda600d3:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^