Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> eaaf8c9f8d73addf5c40f8a40430b1e684e4064f97aa03f689dcea5d6933fa41:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^