Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1f2c56a2b0298895810cd341451942b9b7a7b48bdb0a6fffed3d421b1fe72509:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^