Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> cedb8fc1a760e30b89445ab24f476151af86af53186a166a9a139dba58735761:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^