Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> aadc670bd29a2ce77ddfdd6632b71b930090a3db5ff36baea2c36ba92d49e43a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^