How to get SOL balance change for PumpFun exchange in Solana
As of the latest Solana updates, it is not possible to directly get the SOL (Solana) balance change using the getTransaction method. However, I can walk you through the process of achieving this.
Understanding the Transaction Response
When using the Solana API for transactions, such as getTransaction, it returns a transaction object that contains information about the last transaction. The transaction response usually includes several properties, including the current balance of various assets.
In your case, when you try to get the SOL balance change via getTransaction(), you only get the pumpfun token balance. To achieve the desired result, you need to combine the transaction data with other information to calculate the SOL balance change.
PumpFun Swap Transaction Structure
To perform a pumpfun swap in Solana, you will need to execute multiple transactions for each asset involved in the swap. Here is an example of how you can structure these transactions:
// Pumpfun swap transaction structure
type PumpfunSwapTransaction = {
account0: string,
account1: string,
data: Uint8Array,
};
// Create a pumpfun swap transaction
const pumpfunSwapTx = {
accounts: [
{ name: "pumpfun", type: "pubkey", pubkey: "0x...PUMPFUN_TOKEN_PUBKEY" },
{ name: "account1", type: "pubkey", pubkey: "0x...ACCOUNT1_PUBKEY" },
{ name: "data", type: "bytes", data: Uint8Array.from(...),
// More accounts and data for swap
},
],
};
// Create a transaction object with the pumpfun swap transaction structure
const tx = {
account0: "pumpfun",
account1: "account1",
data: pumpfunSwapTx,
};
Calculating the SOL balance change
To calculate the SOL balance change, you need to execute multiple transactions for each asset included in the swap. Here is an example of how you can do this:
// Create a transaction object with multiple pumpfun swap transactions
const txs: PumpfunSwapTransaction[] = [];
for (let i = 0; i < 10; i++) {
const account1 = "account1" + String.fromCharCode(97 + i); // Generate account names for each asset
const data = Uint8Array.from([...], () => (i * 16).toString(16)); // Generate a random byte array
const pumpfunSwapTx = {
accounts: [
{ name: "pumpfun", type: "pubkey", pubkey: 0x${account1} },
{ name: "data", type: "bytes", data: Uint8Array.from(..., ...), / Next account and data / },
],
};
txs.push(pumpfunSwapTx);
}
// Create a transaction object with the pumpfun swap transactions
const tx = {
account0: "pumpfun",
account1: "account1" + String.fromCharCode(97, 9),
data: pumpfunSwapTx,
};
// Submit transaction (send transaction separately)
submitTransaction(tx);
Note:
The above example assumes a simple pumpfun swap scenario. In reality, you would have to handle multiple asset swaps and additional accounts.
The getTransaction method does not provide direct access to the SOL balance change. However, by executing multiple transactions for each asset involved in the swap, you can calculate the desired SOL balance change.
Additional Tips:
- Make sure to check the Solana API documentation for the latest information on sending and executing a transaction.
- Consider using a tool like `
solscan'' or`solhint” to help you identify potential issues with your transactions.
- Always handle errors and exceptions properly when working with the Solana API.