Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ceb43cb69fbf53980d9d06d6d18b76848a70f4770eba90d8254a422924a5ba44:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^