Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 6ff52b0369c6cc7c03808d952be91e37b80d2a4e19ec06269287da7b4206880c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^