Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b2954b612d9a033e57804b4b7899570036436db4ecf3ca96320d2ef91b09f9bd:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^