Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d23d5b1c8de5686fd45c3b7d9e8830676102796c867a776f3921a8ee0256b944:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^