Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 14b6d058fc7f7057d3a1b909e7dedfc8719e23c4979f8da6bb8d1b1237e5795d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^