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Understanding the before and post-banking checks on Solana: a guide for developers
As a developer working with blockchain and cryptocurrency, it is essential to understand the complexities of the validation of user payments on platforms like Solana. In this article, we will immerse ourselves on how to check the before and post-balance checks in an account in a transaction (TX) on Solana.
What are the pre-equins?
On most blockchain platforms, including Solana, the sales refer to the amount of value or tokens that a account stored in its wallet. Pre-equilibers occur before the user makes transactions, while post-balances occur after having paid.
In the context of a Solana transaction, pre-equations are used as a safety measure to prevent the falsification of user funds. This is particularly important when users make several payments in the same block.
Verification of the pre-balance
A prior verification is carried out by comparing the expected (pre-balance) balance with the current equilibrium (post-balance). If they correspond, it is considered a valid transaction and can be treated immediately.
Here are some examples of scenarios where the prior checks could fail:
- Multiple payments in the same block : When users perform several transactions in the same block, the pre-balance check may not correctly explain all individual sales.
- Non-valid or obsolete scales : if the balance of a user is obsolete (for example, due to a transaction which has not yet been treated), the pre-equilibrian check could return a incorrect result.
Post-balance verification
A post-balance check is made by comparing the current balance (post-balance) to the expected balance (pre-balance). If they do not correspond, it is considered invalid and can be rejected by the network or the wallet.
Here are some scenarios where post-balance sheet verification could fail:
- Balance the differences
: Even if the pre-balances are correct, there may still be equilibrium differences due to factors such as:
* Network congestion
* Transaction failures (for example, block rejection)
* Wallet errors
- Pre-balance updates : If the account of a user is updated with new sales, the post-equalation check may not catch these modifications.
Best practices for front and post-balance checks on Solana
To minimize risks and ensure reliable transactions:
- Use atomic operations : When you perform several transactions in the same block, use atomic operations to make sure that each transaction is treated independently.
- Check the balance updates : Regularly check the account balances by checking if they correspond to the expected values once a user has made transactions or received payments.
- implement the robust management of errors : properly manage errors and exceptions, including those related to pre- and post-balance.
Conclusion
Pre-balance controls are an essential safety measure on Solana, helping to prevent the falsification of user funds. By understanding the implications of several payments in the same block and implementing best practices for post-balance checks, developers can ensure reliable transactions and maintain user confidence in their applications.