Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d63a3eb7549d5aab9b38e764ad67afc67af8149ec9fd9a617b1eb3efed11dd48:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^