Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> f06114c47c260e48500bd15117ac1a31570b87a5c9e4e403e7753558ce6df70c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^