Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c38109634e4838820c7b31e2c842391b66589e56c98388738a13a1bd22e34179:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^