How to get SOL balance change on PumpFun exchange in Solana
According to the latest Solana updates, it is not possible to get SOL (Solana) balance change directly using the getTransaction method. However, I can walk you through the process.
Understanding the transaction response
When the Solana API is used for transactions such as “getTransaction”, it returns a transaction object containing information about the recent transaction. A transaction response typically contains multiple properties, including the current balance of various assets.
In your case, when you try to get SOL balance change using “getTransaction()”, you only get the pumpfun token balance. To achieve the desired result, you need to combine the transaction data with additional data to calculate the SOL balance change.
PumpFun Swap Transaction Structure
To perform a pumpfun swap in Solana, you need to perform multiple transactions for each asset in the exchange. Here is an example of how you can parse 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(...),
// Other 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 perform multiple transactions for each asset involved 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); // Create the account names for each asset
const data = Uint8Array.from([...], () => (i * 16).toString(16)); // Create a random byte array
const pumpfunSwapTx = {
accounts: [
{ name: "pumpfun", type: "pubkey", pubkey: 0x${account1} },
{ name: "data", type: "bytes", data: Uint8Array.from(..., ...), / Additional account and data / },
],
};
txs.push(pumpfunSwapTx);
}
// Create a transaction object with pumpfun swap transactions
const tx = {
account0: "pumpfun",
account1: "account1" + String.fromCharCode(97, 9),
data: pumpfunSwapTx,
};
// Submit a transaction (single transaction submission)
submitTransaction(tx);
Note: The above example assumes a simple pumpfun swap scenario. In reality, you would have to deal with multiple asset exchanges 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 exchange, you can calculate the desired SOL balance change.
Additional Tips:
- Be 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 identify potential issues with your transaction.
- Always handle errors and exceptions properly when working with the Solana API.