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Here’s an article on how to determine each address lookup table (ALT) that a Solana wallet has authority over:
Determine each address lookup table (ALT) that a Solana wallet has authority over
As a developer working with Solana, it’s crucial to understand how your wallet interacts with the blockchain. One aspect of this interaction that can be difficult to understand is address lookup tables (ALTs). In this article, we’ll look at how to determine each address lookup table that your Solana wallet has authority over.
What are address lookup tables (ALTs)?
Address lookup tables (ALTs) on the Solana blockchain serve as a mapping between accounts and their corresponding public keys. Each ALT defines a set of accounts that have access to certain data, such as transaction history or account balances. A thorough understanding of your wallet’s ALTs is essential to ensure data consistency, security, and efficient interactions with the network.
How to find your wallet’s ALTs
To find the address lookup tables your Solana wallet has authority over, you can follow these steps:
Step 1: Check the solana CLI
The easiest way to find out which addresses have access to which data is to check the solana command line interface (CLI). Open a terminal and run:
solana list-accounts --address-types=account
This command will display a list of all the accounts in your wallet along with their associated public keys. Look for account types that have an “A” prefix in the key field.
Step 2: Check the solana CLI – Account List
The solana CLI also provides an option to list all accounts:
solana accounts --list-accounts
This command displays a list of all accounts, including their corresponding public keys and address lookup tables.
Step 3: Check the chaincode code
To determine specific ALTs for a specific data type (e.g. transactions or accounts), you need to check the chaincode code. Solana chaincodes are written in Rust, an executable language that interacts directly with the blockchain. You can use tools like solc and rust-ccache to compile and analyze your chaincode.
For example, let’s say you have a simple account data type:
struct AccountData {
pub balances: [u8; 32],
}
impl AccountData {
fn new(account_id: u64) -> Self {
// Create a new AccountData instance for the given account ID
}
}
You can then use the solc tool to compile and parse your chaincode:
solc -v --name my-chaincode --input-file my-chaincode.rs
This will generate compiled Rust code that you can parse for specific ALTs.
Step 4: Verifying the Chaincode Code – Address Lookup Table (ALT) Generation
When generating an address lookup table, Solana uses a process called “address lookup table generation” which involves:
- Creating a private key for each account type.
- Assign public keys to these accounts based on their corresponding private keys.
You can inspect the generated chaincode code to see which addresses have access to certain data and which ALTs are created:
// Generate an address lookup table (ALT) for transactions
chaincode_generate_transactionalt(my_account_id, &mut transaction_data);
This will create a new TransactionAlt instance representing the generated ALT.
