Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d04ec25e625bc5e713ed92a460d93b2f42b128783eb4c6fdc76b4cf98b400491:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^