Function state_from_account

pub fn state_from_account<T>(account: &T) -> Result<State, Error>
where
    T: ReadableAccount + StateMut<Versions>,

Deserialize the state of a durable transaction nonce account.

Errors

Returns an error if the account is not owned by the system program or contains no data.

Examples

Determine if a nonce account is initialized:

use solana_rpc_client_nonce_utils::nonblocking;
use solana_rpc_client::nonblocking::rpc_client::RpcClient;
use solana_sdk::{
    nonce::State,
    pubkey::Pubkey,
};
use anyhow::Result;

futures::executor::block_on(async {
async fn is_nonce_initialized(
    client: &RpcClient,
    nonce_account_pubkey: &Pubkey,
) -> Result<bool> {

    // Sign the tx with nonce_account's `blockhash` instead of the
    // network's latest blockhash.
    let nonce_account = client.get_account(nonce_account_pubkey).await?;
    let nonce_state = nonblocking::state_from_account(&nonce_account)?;

    Ok(!matches!(nonce_state, State::Uninitialized))
}