Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 2d3318ad82737b4c7a79d6fb5575d704bd9c8557cfe9df7d33768efa63c40485:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^