Solana: How reliable iis checking the diff between preBalance and postBalance for an account inside a tx?

Understanding of pre and post balance controls on Solana: a guide for developers

As a developer who works with blockchain and cryptocurrency, it is essential to understand the complexities of the validation of users’ payments on platforms such as Solana. In this article, we will deepen how to check the pre and post balance checks in an account within a transaction (TX) on Solana.

What are pre-plays?

On most of the blockchain platforms, including Solana, the sales refer to the amount of value or to the tokens that an account stored in its wallet. The pre-plays occur before the user performs any transaction, while post-balanches occur after making payments.

In the context of a transaction on Solana, pre and post-balancing are used as a safety measure to prevent tampering with user funds. This is particularly important when users make more payments in the same block.

Pre-equilibrium control

Pre-Byzing check is performed by comparing the expected (pre-living) balance with the current balance (post-balancio). If they correspond, it is considered a valid transaction and can be developed immediately.

Here are some examples of scenarios in which pre-Byzing checks may fail:

• Multiple payments in the same block : When users make more transactions in the same block, pre-equilibrium control may not take into account correct of all individual sales.

• Non valid or obsolete sales : If the balance of a user is obsolete (for example, due to a transaction that has not yet been processed), pre-equilibrium control could return an incorrect result.

Post-balancing control

A post-balancing control is performed by comparing the current (post-balancio) balance with the expected balance (pre-equilibrium). If they do not correspond, it is considered unsalid and can be rejected by the network or wallet.

Here are some scenarios in which post-balancing control may fail:

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* Network congestion

* Transactions faults (e.g. Requatement of the block)

* Portfolio errors

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Best practices for pre and post balance controls on Solana

To minimize risks and guarantee reliable transactions:

• Use atomic operations : When performing more transactions in the same block, use atomic operations to ensure that each transaction is developed independently.

• Check the updates of the balance : regularly check the sales of the accounts checking if they correspond to the values ​​provided after a user has made transactions or payments received.

• Implement a robust errors management : correctly manage errors and exceptions, including those relating to pre and post-balancing.

Conclusion

Pre-Byzing checks are an essential security measure on Solana, helping to prevent tampering with user funds. By understanding the implications of multiple payments in the same block and implementing the best practices for post-balancing controls, developers can guarantee reliable transactions and maintain the user’s trust in their applications.