Raydium new pool listener

index.ts

import { LiquidityPoolKeysV4, MARKET_STATE_LAYOUT_V3, Market, TOKEN_PROGRAM_ID } from "@raydium-io/raydium-sdk";
import { Connection, Logs, ParsedInnerInstruction, ParsedInstruction, ParsedTransactionWithMeta, PartiallyDecodedInstruction, PublicKey } from "@solana/web3.js";

const RPC_ENDPOINT = 'https://api.mainnet-beta.solana.com';
const RAYDIUM_POOL_V4_PROGRAM_ID = '675kPX9MHTjS2zt1qfr1NYHuzeLXfQM9H24wFSUt1Mp8';
const SERUM_OPENBOOK_PROGRAM_ID = 'srmqPvymJeFKQ4zGQed1GFppgkRHL9kaELCbyksJtPX';
const SOL_MINT = 'So11111111111111111111111111111111111111112';
const SOL_DECIMALS = 9;

const connection = new Connection(RPC_ENDPOINT);
const seenTransactions : Array<string> = []; // The log listener is sometimes triggered multiple times for a single transaction, don't react to tranasctions we've already seen

subscribeToNewRaydiumPools();


function subscribeToNewRaydiumPools() : void
{
    connection.onLogs(new PublicKey(RAYDIUM_POOL_V4_PROGRAM_ID), async (txLogs: Logs) => {
        if (seenTransactions.includes(txLogs.signature)) {
            return;
        }
        seenTransactions.push(txLogs.signature);
        if (!findLogEntry('init_pc_amount', txLogs.logs)) {
            return; // If "init_pc_amount" is not in log entries then it's not LP initialization transaction
        }
        const poolKeys = await fetchPoolKeysForLPInitTransactionHash(txLogs.signature); // With poolKeys you can do a swap
        console.log(poolKeys);
    });
    console.log('Listening to new pools...');
}

function findLogEntry(needle: string, logEntries: Array<string>) : string|null
{
    for (let i = 0; i < logEntries.length; ++i) {
        if (logEntries[i].includes(needle)) {
            return logEntries[i];
        }
    }

    return null;
}

async function fetchPoolKeysForLPInitTransactionHash(txSignature: string) : Promise<LiquidityPoolKeysV4>
{
    const tx = await connection.getParsedTransaction(txSignature, {maxSupportedTransactionVersion: 0});
    if (!tx) {
        throw new Error('Failed to fetch transaction with signature ' + txSignature);
    }
    const poolInfo = parsePoolInfoFromLpTransaction(tx);
    const marketInfo = await fetchMarketInfo(poolInfo.marketId);

    return {
        id: poolInfo.id,
        baseMint: poolInfo.baseMint,
        quoteMint: poolInfo.quoteMint,
        lpMint: poolInfo.lpMint,
        baseDecimals: poolInfo.baseDecimals,
        quoteDecimals: poolInfo.quoteDecimals,
        lpDecimals: poolInfo.lpDecimals,
        version: 4,
        programId: poolInfo.programId,
        authority: poolInfo.authority,
        openOrders: poolInfo.openOrders,
        targetOrders: poolInfo.targetOrders,
        baseVault: poolInfo.baseVault,
        quoteVault: poolInfo.quoteVault,
        withdrawQueue: poolInfo.withdrawQueue,
        lpVault: poolInfo.lpVault,
        marketVersion: 3,
        marketProgramId: poolInfo.marketProgramId,
        marketId: poolInfo.marketId,
        marketAuthority: Market.getAssociatedAuthority({programId: poolInfo.marketProgramId, marketId: poolInfo.marketId}).publicKey,
        marketBaseVault: marketInfo.baseVault,
        marketQuoteVault: marketInfo.quoteVault,
        marketBids: marketInfo.bids,
        marketAsks: marketInfo.asks,
        marketEventQueue: marketInfo.eventQueue,
    } as LiquidityPoolKeysV4;
}

async function fetchMarketInfo(marketId: PublicKey) {
    const marketAccountInfo = await connection.getAccountInfo(marketId);
    if (!marketAccountInfo) {
        throw new Error('Failed to fetch market info for market id ' + marketId.toBase58());
    }
    
    return MARKET_STATE_LAYOUT_V3.decode(marketAccountInfo.data);
}


function parsePoolInfoFromLpTransaction(txData: ParsedTransactionWithMeta) 
{
    const initInstruction = findInstructionByProgramId(txData.transaction.message.instructions, new PublicKey(RAYDIUM_POOL_V4_PROGRAM_ID)) as PartiallyDecodedInstruction|null;
    if (!initInstruction) {
        throw new Error('Failed to find lp init instruction in lp init tx');
    }
    const baseMint = initInstruction.accounts[8];
    const baseVault = initInstruction.accounts[10]; 
    const quoteMint = initInstruction.accounts[9];
    const quoteVault = initInstruction.accounts[11];
    const lpMint = initInstruction.accounts[7];
    const baseAndQuoteSwapped = baseMint.toBase58() === SOL_MINT;
    const lpMintInitInstruction = findInitializeMintInInnerInstructionsByMintAddress(txData.meta?.innerInstructions ?? [], lpMint);
    if (!lpMintInitInstruction) {
        throw new Error('Failed to find lp mint init instruction in lp init tx');
    }
    const lpMintInstruction = findMintToInInnerInstructionsByMintAddress(txData.meta?.innerInstructions ?? [], lpMint);
    if (!lpMintInstruction) {
        throw new Error('Failed to find lp mint to instruction in lp init tx');
    }
    const baseTransferInstruction = findTransferInstructionInInnerInstructionsByDestination(txData.meta?.innerInstructions ?? [], baseVault, TOKEN_PROGRAM_ID);
    if (!baseTransferInstruction) {
        throw new Error('Failed to find base transfer instruction in lp init tx');
    }
    const quoteTransferInstruction = findTransferInstructionInInnerInstructionsByDestination(txData.meta?.innerInstructions ?? [], quoteVault, TOKEN_PROGRAM_ID);
    if (!quoteTransferInstruction) {
        throw new Error('Failed to find quote transfer instruction in lp init tx');
    }
    const lpDecimals = lpMintInitInstruction.parsed.info.decimals;
    const lpInitializationLogEntryInfo = extractLPInitializationLogEntryInfoFromLogEntry(findLogEntry('init_pc_amount', txData.meta?.logMessages ?? []) ?? '');
    const basePreBalance = (txData.meta?.preTokenBalances ?? []).find(balance => balance.mint === baseMint.toBase58());
    if (!basePreBalance) {
        throw new Error('Failed to find base tokens preTokenBalance entry to parse the base tokens decimals');
    }
    const baseDecimals = basePreBalance.uiTokenAmount.decimals;

    return {
        id: initInstruction.accounts[4],
        baseMint,
        quoteMint,
        lpMint,
        baseDecimals: baseAndQuoteSwapped ? SOL_DECIMALS : baseDecimals,
        quoteDecimals: baseAndQuoteSwapped ? baseDecimals : SOL_DECIMALS,
        lpDecimals,
        version: 4,
        programId: new PublicKey(RAYDIUM_POOL_V4_PROGRAM_ID),
        authority: initInstruction.accounts[5],
        openOrders: initInstruction.accounts[6],
        targetOrders: initInstruction.accounts[13],
        baseVault,
        quoteVault,
        withdrawQueue: new PublicKey("11111111111111111111111111111111"),
        lpVault: new PublicKey(lpMintInstruction.parsed.info.account),
        marketVersion: 3,
        marketProgramId: initInstruction.accounts[15],
        marketId: initInstruction.accounts[16],
        baseReserve: parseInt(baseTransferInstruction.parsed.info.amount),
        quoteReserve: parseInt(quoteTransferInstruction.parsed.info.amount),
        lpReserve: parseInt(lpMintInstruction.parsed.info.amount),
        openTime: lpInitializationLogEntryInfo.open_time,
    }
}

function findTransferInstructionInInnerInstructionsByDestination(innerInstructions: Array<ParsedInnerInstruction>, destinationAccount : PublicKey, programId?: PublicKey) : ParsedInstruction|null
{
    for (let i = 0; i < innerInstructions.length; i++) {
        for (let y = 0; y < innerInstructions[i].instructions.length; y++) {
            const instruction = innerInstructions[i].instructions[y] as ParsedInstruction;
            if (!instruction.parsed) {continue};
            if (instruction.parsed.type === 'transfer' && instruction.parsed.info.destination === destinationAccount.toBase58() && (!programId || instruction.programId.equals(programId))) {
                return instruction;
            }
        }
    }

    return null;
}

function findInitializeMintInInnerInstructionsByMintAddress(innerInstructions: Array<ParsedInnerInstruction>, mintAddress: PublicKey) : ParsedInstruction|null
{
    for (let i = 0; i < innerInstructions.length; i++) {
        for (let y = 0; y < innerInstructions[i].instructions.length; y++) {
            const instruction = innerInstructions[i].instructions[y] as ParsedInstruction;
            if (!instruction.parsed) {continue};
            if (instruction.parsed.type === 'initializeMint' && instruction.parsed.info.mint === mintAddress.toBase58()) {
                return instruction;
            }
        }
    }

    return null;
}

function findMintToInInnerInstructionsByMintAddress(innerInstructions: Array<ParsedInnerInstruction>, mintAddress: PublicKey) : ParsedInstruction|null
{
    for (let i = 0; i < innerInstructions.length; i++) {
        for (let y = 0; y < innerInstructions[i].instructions.length; y++) {
            const instruction = innerInstructions[i].instructions[y] as ParsedInstruction;
            if (!instruction.parsed) {continue};
            if (instruction.parsed.type === 'mintTo' && instruction.parsed.info.mint === mintAddress.toBase58()) {
                return instruction;
            }
        }
    }

    return null;
}

function findInstructionByProgramId(instructions: Array<ParsedInstruction|PartiallyDecodedInstruction>, programId: PublicKey) : ParsedInstruction|PartiallyDecodedInstruction|null
{
    for (let i = 0; i < instructions.length; i++) {
        if (instructions[i].programId.equals(programId)) {
            return instructions[i];
        }
    }

    return null;
}

function extractLPInitializationLogEntryInfoFromLogEntry(lpLogEntry: string) : {nonce: number, open_time: number, init_pc_amount: number, init_coin_amount: number} {
    const lpInitializationLogEntryInfoStart = lpLogEntry.indexOf('{');

    return JSON.parse(fixRelaxedJsonInLpLogEntry(lpLogEntry.substring(lpInitializationLogEntryInfoStart)));
}

function fixRelaxedJsonInLpLogEntry(relaxedJson: string) : string
{
    return relaxedJson.replace(/([{,])\s*([a-zA-Z_][a-zA-Z0-9_]*)\s*:/g, "$1\"$2\":");
}

After tons of testing, I believe connection.onProgramAccountChange() is not only a better way since it gives you the pool Id directly, it is also less intensive on the RPC node. This becomes a serious case when using a RPC node by a provider who charges by unit. From testing, by changing to onProgramAccountChange, unit consumption dropped by about 80%. The reason is simple, an application can write tons of logs for just a single transaction while if you listen to the change itself, it is just one per transaction.

An example usage is

connection.onProgramAccountChange(new PublicKey(RAYDIUM_POOL_V4_PROGRAM_ID),  async (updatedAccountInfo) => {
      const poolId = updatedAccountInfo.accountId.toString();
      if (seenTransactions.includes(poolId)) {
        return
      }
      seenTransactions.push(poolId)

     ...
})

After tons of testing, I believe connection.onProgramAccountChange() is not only a better way since it gives you the pool Id directly, it is also less intensive on the RPC node. This becomes a serious case when using a RPC node by a provider who charges by unit. From testing, by changing to onProgramAccountChange, unit consumption dropped by about 80%. The reason is simple, an application can write tons of logs for just a single transaction while if you listen to the change itself, it is just one per transaction.

An example usage is

connection.onProgramAccountChange(new PublicKey(RAYDIUM_POOL_V4_PROGRAM_ID),  async (updatedAccountInfo) => {
      const poolId = updatedAccountInfo.accountId.toString();
      if (seenTransactions.includes(poolId)) {
        return
      }
      seenTransactions.push(poolId)

     ...
})

Yes, your way is actually a better way to get a new pool, but how do we suppose to get the poolKeys data?

You can see that in endrsmar's code, the poolKeys data relies heavily on transaction logs, but I don't find any transaction logs or related data in the given updatedAccountInfo.

Also, it seems like this event will trigger a new updateAcountInfo when a Token Account is created, not when a Liquidity Pool is created.

This has been super helpful for me, just wondering if this is still the best way to get the pool ID for new pools?
Has there been any update to what you've found?

Hi all, Hope someone can help me swap without pool key or pool information. I accept the swap failure, and swap continuously until LP is added.