Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 179fae200670a7e84e8b149e7b5ee22a6e07150c513cd5a2529fefab3814e285:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^