> For the complete documentation index, see [llms.txt](https://yihau.gitbook.io/solana-go/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://yihau.gitbook.io/solana-go/advanced/durable-nonce.md).

# Durable Nonce

A transaction will include a recent blockhash and it will expire in 2 min. In some scenarios we need to hold the transaction for a while then send it. To prevent tx expired, you can use the mechanism, durable nonce.