How to Get SOL Balance Change for a PumpFun Exchange in Solana
As of the latest Solana updates, it is not possible to directly get the SOL (Solana) balance change via the getTransaction method. However, I can walk you through the process of doing so.
Understanding the Transaction Response
When you use the Solana API for transactions, such as getTransaction, it returns a transaction object that contains information about the recent transaction. The transaction response typically 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 are only getting the pumpfun token balance. To get the desired result, you need to combine the transaction data with additional 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(...),
// Additional accounts and data for the swap
},
],
};
// Create a transaction object with the structure of the pumpfun swap transaction
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 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 cont1 = "cont1" + String.fromCharCode(97 + i); // Generate account names for each asset
const data = Uint8Array.from([...], () => (i * 16).toString(16)); // Generate a random array of bytes
const pumpfunSwapTx = {
accounts: [
{ name: "pumpfun", type: "pubkey", pubkey: 0x${account1} },
{ name: "data", type: "bytes", data: Uint8Array.from(..., ...), / Account and additional 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 the transaction (sending the individual transaction)
submitTransaction(tx);
Note:
The above example assumes a simple pumpfun swap scenario. In reality, you would have to manage 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:
- Be sure to check the Solana API documentation for the latest information on submitting and executing transactions.
- Consider using a tool like
solscanorsolhintto help identify potential issues with your transactions.
- Always handle errors and exceptions properly when working with the Solana API.
