You may see a “Your swap expired before it could be filled. Try again or learn more” error message while using UniswapX.
UniswapX swaps expire when swap is not filled within the designated time frame.
The deadline for a UniswapX swap to be filled is 1 minute. If no filler fills the swap by then the swap will expire.
There are network costs charged when a swap expires, so the swap can be submitted again.