Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 57c2ba167b04599a3d1e93b626c9d657957e1887ec2974cf0c93c49c8df585eb:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^