Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 84ef3879cde6cd16e2bb2e4b0797945b654f7dde7f15c0f166a6209b8489266a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^