Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 477471587603d3a9b36fa4ebff28acbf9e3e2e00d6233dee06c5e69c06ad1c52:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^