Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a6ba75a42caa48e73dcec4a568a6d0c3d126765675b14c787bf9a3c3e0600064:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^