Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e6e220ff6c771c3e8ad5bc8b4a72076820400fac7b572059d68085ec005aed39:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^