How to query the nonce of an account

angus · April 24, 2024, 3:04am

How to query the nonce of an account？
Similar to eth’s eth_getTransactionCount

Doris · April 24, 2024, 6:05am

The node exposes the account nonce over this interface:
https://developer.concordium.software/concordium-grpc-api/#concordium.v2.NextAccountSequenceNumber

Depending on if you are using a specific SDK, this functionality is usually exposed e.g.:

    let nonce = node_client
        .get_next_account_sequence_number(&keys.address)
        .await
        .context("Could not query the account nonce.")?
        .nonce;

github.com

Concordium/concordium-dapp-examples/blob/main/trackAndTrace/sponsored-transaction-service/src/main.rs#L146


      
                  .keep_alive_while_idle(true);
          
              let mut node_client = concordium_rust_sdk::v2::Client::new(endpoint)
                  .await
                  .context("Unable to establish connection to the node.")?;
          
              // Load account keys and sender address from a file
              let keys: WalletAccount = WalletAccount::from_json_file(app.keys_path.clone())
                  .context("Could not get the account keys from a file.")?;
          
              let nonce = node_client
                  .get_next_account_sequence_number(&keys.address)
                  .await
                  .context("Could not query the account nonce.")?
                  .nonce;
          
              tracing::info!("Starting server...");
              tracing::debug!(
                  r#"
          With the following configuration:
              Node endpoint: {}