Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 2e7f7e2a3ef9caeb124525e05f45231d4b979c55e0c04273e2aa0c4fbb78282d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^