Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 95ac9047d56003e9da019a8502ad6427c4f6e7f225cb48c321bbcfa143e67a23:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^