Solana: Why are my mint tokens interchaged when I create a Raydium CPMM pool

Understanding Solana Exchange: A Guide to Beating CPMM Pools

When you create a centralized money market (CPMM) pool on Solana using the mintA and mintB fields in the createPool cpmm method, you may notice that your tokens are swapped when they should be identical. This is known as symbol swapping.

In this article, we will dive deeper into why lie A is swapped for B instead of B for A and provide a step-by-step solution to fix this issue.

createPool cpmm Method

The createPool CPMM method allows you to create a CPMM pool on Solana. It requires three parameters: the base token (A) and your token. (B) and an optional quote token (C). The method returns a Pool object, which contains information about the pool you created.

pub fn creaPool(
cpmmConfig: Pool Configuration,
) -> Pool {
// Create a new CPMM pool with the specified parameters
}

Token Swap

When calling the createPool cpmm method, Solana uses the token swapping algorithm to create a valid pool. This algorithm takes into account several factors, including:

• Token Name: Base token (A), your tokens. (B), and the tokens in quotes (C) must have the same name.

• Decimal Symbol

  : Both A and B have the same decimal places.

• Token Supply: Total amount of tokens must be equal.

When you create a mintA field with the desired values, Solana automatically generates a corresponding mintB field that represents your token. However, if these fields are swapped (e.g. mintB becomes mintA), the token swapping algorithm will not produce the expected result.

Why was the number B changed?

There are several reasons why mint B may be swapped with mint A:

• Token mismatch: If mintB and mintA have different names, the token swapping algorithm will swap them.

• Decimal symbol: Solana requires that both mintA and mintB have the same decimal places. If they do not match, the token swapping algorithm will swap them.

Token swapping resolution

To resolve this issue, you need to ensure that mintA and mintB are generated correctly when creating a CPMM pool using the createPool cpmm method. Here is an updated example:

use solana_program::{
account_info::{next_account_info, AccountInfo},
entrypoint::ProgramResult,
program_error::Printing error,
pubkey::Public key,
};
pub fn createPool(
cpmmConfig: Pool configuration,
) -> Program result {
let mintA = next_account_info("mint_A"?);
let mintB = next_account_info("mint_B"?);
// Create a new CPMM pool with the specified parameters
self.pool.create(cpmmConfig)?;
}
// Example usage:
fn main() {
let config = PoolConfig::new();
let result = createPool(config).unwrap();
println!("Pilot created: {:?}", result);
}

In this example, we generate mintA and mintB using the next_account_info function. We then pass these values ​​to the createPool method.

By following these steps, you should be able to create a CPMM pool on Solana with identical mint tokens (A and B). If you are still having trouble, feel free to provide more details about your project. and I will do my best to continue helping you.

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