Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a49e15d4f34cc77d311e1b98481c40bca0fb2724ed164c826d257a3ef177137a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^