Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 84731ce69c0a70475f9f8a2371e06bc5f3b56da225e9ecf531f9ba01d3791c08:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^