Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9d326f01682402c9b722eb7b2ce497f7052a785bf6c7a19c873e7864da13c9d5:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^