Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1a9991caa0acb5472252f100bd8b8075c1121973971ceca4454b1fa3861e8d06:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^