Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0e8d5e3c4238b344cb4ef5d246a58ae5b0d46d367f66b401d0b334d248b90adf:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^