Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1c477141478d56e6fd927e25cbad11b6abc23f8c0edf32b0420d17234b5d4a38:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^