Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 41e4a281bb9b0885e6cda2a31833fcd2c11cd2b4f8214f495da82fe1513623b8:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^