Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1b1bc55cc4efd2fb8051ef0345dfc17df611f5dd76012f6a67063b22f58d7d9d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^