Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 95d4f9d25f58619d13dcd780ef64685af7447553e841f15bcfb352840492828b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^