Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 97c5273c2510774fb28a0ceb5766503f4b120f5909bb1e4ea879231d7ab9a7b1:15:8
   |
15 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^