Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 66fe73dc80c7f596ad347d0887df6411ff3fe9709e550feef1264ac9505a26ff:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^