Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9f3d628728846d8384da02fc75659fad3a4aa69e1a69270b33f16d512541bb7f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^