Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5b4711f8d09f56115eac050783565b3adfb65970e2a74cf921b5fba501fb90c8:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^