Streaming and Parsing Pump Swap Transactions
Real-Time Streaming and Parsing of Pump Swap AMM Transactions Using Solana Yellowstone gRPC and IDL-Based Parsers
Real-time data is vital for Solana applications tracking dynamic markets like Pump.fun and PumpSwap. gRPC streaming provides a high-performance, low-latency method to receive real-time on-chain updates. In this document, we’ll explore how to stream and parse Pump.fun transactions using Solana gRPC.
The complete source code for this project is available on GitHub.
Please feel free to clone the repository and try it out. Additionally, you will find other relevant and useful code examples related to gRPC and streaming here.
Step-by-Step Breakdown
This project consists of two key components:
Streaming Pump.fun Transactions via Yellowstone gRPC
Parsing those transactions using the program's IDL
Streaming Transactions Using gRPC
The first step involves initializing the Solana Yellowstone Client. You can get Solana Yellowstone gRPC access from the Shyft Dashboard. Please check out our gRPC Authentication Docs for more details.
Initializing the Client
Once you have the authentication details, you can initialize the client in the following manner,
import Client from "@triton-one/yellowstone-grpc";
const client = new Client(
"YOUR-GRPC-ENDPOINT", //yellowstone grpc url
"GRPC-ACCESS-TOKEN", //authentication token
undefined
);
You can use any Yellowstone gRPC endpoint with this client. An access token is optional, as some gRPC services don't require authentication.
The Rust client supports several additional options, as demonstrated in the example above. Most of these options are also available for the TS client, where they are passed as the third argument to the Client
constructor.
Specifying what data to stream from gRPC
To specify what on-chain data, we send a SubscribeRequest
over the existing Solana Yellowstone gRPC client. These Request allows you to filter for specific accounts, transactions, slots, or other Solana on-chain events, giving you full control over the data you receive.
You can find out more about Subscribe Requests here. The example below demonstrates how to initiate a gRPC stream by sending a SubscribeRequest
using a standard gRPC client:
const req: SubscribeRequest = {
accounts: {},
slots: {},
transactions: {
pumpFun: {
vote: false,
failed: false,
signature: undefined,
accountInclude: ["pAMMBay6oceH9fJKBRHGP5D4bD4sWpmSwMn52FMfXEA"],
//for our usecase we only need to listen to transaction belonging to one program, so we have added one address
accountExclude: [],
accountRequired: [],
},
},
transactionsStatus: {},
entry: {},
blocks: {},
blocksMeta: {},
accountsDataSlice: [],
ping: undefined,
commitment: CommitmentLevel.CONFIRMED,
};
Once established, the stream will begin sending data directly to your application. You have the flexibility to modify your subscription on the fly, allowing you to change the data specifications you receive without stopping your stream. For more details on reconnecting and re-starting the stream from a specific slot, or closing your gRPC connection, you can find additional information in our documentation.
Parsing the received transaction
Once a raw Solana transaction is received via the Yellowstone gRPC stream, it must be parsed to extract meaningful, human-readable data. For JavaScript/TypeScript applications, we use Shyft's IDL-based transaction parser, which decodes the transactions received from the gRPC into structured data based on the respective program's IDL. On Rust however, we use a interface generated by solores to parse the transaction instruction.
import { SolanaParser } from "@shyft-to/solana-transaction-parser";
const PUMP_SWAP_IX_PARSER = new SolanaParser([]);
//initializing the parser
PUMP_SWAP_IX_PARSER.addParserFromIdl(
PUMP_SWAP_PROGRAM_ID .toBase58(),
pumpSwapAmmIdl as Idl
);
//adding pump.fun idl for parsing pumpfun transactions
function decodePumpFunTxn(tx: VersionedTransactionResponse) {
if (tx.meta?.err) return;
try{
const paredIxs = PUMP_SWAP_IX_PARSER.parseTransactionData(
tx.transaction.message,
tx.meta.loadedAddresses,
); //parsing transaction
const parsedInnerIxs = PUMP_SWAP_IX_PARSER.parseTransactionWithInnerInstructions(tx);
//parsing inner instructions
//..code shortened
return result;
}catch(err){
console.log(err);
}
}
Important Links
Solana gRPC Documentation – In-depth technical docs for implementing real-time streaming with Yellowstone gRPC and Geyser plugin on Solana.
Blogs on Solana gRPC Streaming – Guides, use cases, and performance benchmarks for building low-latency Solana applications using gRPC-based infrastructure.
Solana DeFi Code Snippets & Examples – Ready-to-use code snippets and integrations for common DeFi protocols, transaction parsers, and real-time Solana data streaming use cases.
Last updated
Was this helpful?