Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 2853bca673fe4975d4a7c02076359b388aa1b5fb931f29a06c416d09f0c0f70b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^