Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5758a1b5a6fb473d2d4571a00765d7fad6eb62e4ea73d93f5d23ae6ed937b389:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^