Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> f5e81209a772a6e7d1e13f9d7631287ac6229d9728114ecebc3f6f7701880a69:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^