Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 957130a963ae877e8a9c56f74a39fad6517367b86e0b2c92f0cb52c6025386bc:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^