Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 72c20d4cef178ab41cbbbb9fef71f8f88ed815b20c49a540c2d459a3ff190b91:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^