Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d98286a61eb2c0be8834fc9b52cdfcf00c72a55531c894141758399a773364fc:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^