Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 183a61a80172bc6f5b4c4a4f3e923a9ebb63a726bc25fe24d965ad19d83c662f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^