Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 242c126acf69d3049fef15ad56ff3a5ccffd90d5d2fc7df05604690348669bc5:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^