Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> cf2a86ea5d90064fb02c464bb46de838b68f0e337f03ed12e25d62f5ec726b55:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^