Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 352f74554b026bec8bad4775cfed7164438ab6cafd2b524f1efcdd66bfe79222:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^