Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> dc5cdbeaf80ae722690f206df333b384a378340f0c6fe2bca3125e19d43d0fb2:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^