📘 PumpFun Swap SDK Integration Guide - cryptoking-max/solana-sniper-bot GitHub Wiki

This guide explains how to use the PumpSdk to execute buy and sell transactions on Pump.fun via Solana using custom logic.

• Solana RPC endpoint

• Private key loaded into wallet

• @pump-fun/pump-sdk installed

• ENV variables:

  • BUY_SLIPPAGE_BPS_PERCENTAGE (default: 500)
  • SELL_SLIPPAGE_BPS_PERCENTAGE (default: 500)
  • BUY_PRIORITIZATION_FEE_LAMPORTS (default: 2000n)
  • SELL_PRIORITIZATION_FEE_LAMPORTS (default: 2000n)

export async function buy_pumpfun(mint: string, amount: number): Promise<string>

1. Load the wallet and initialize the SDK.
2. Fetch global and bonding curve data.
3. Compute token_amount using getBuyTokenAmountFromSolAmount.
4. Construct buy instructions using the SDK.
5. Add compute unit price/limit for better priority.
6. Send and confirm the transaction.

await buy_pumpfun("MintAddressHere", 0.1);

export async function sell_pumpfun(mint: string, token_amount: number): Promise<string>

1. Retry logic up to 3 times in case of failure.
2. Validate if the wallet has enough tokens to sell.
3. Fetch bonding curve data and calculate sol_amount.
4. Build sell instructions using the SDK.
5. Append compute budget instructions.
6. Submit and confirm the transaction.

await sell_pumpfun("MintAddressHere", 1000);

Used to increase priority of transactions.

ComputeBudgetProgram.setComputeUnitLimit({ units: 200000 });
ComputeBudgetProgram.setComputeUnitPrice({ microLamports: prioritizationFee });

• Retries up to 3 times for sell_pumpfun
• Logs errors and dynamically adjusts sell amount based on current balance
• Gracefully exits if no balance is found

/src
  |- swap.ts          # Contains buy_pumpfun & sell_pumpfun
  |- wallet.ts        # loadwallet()
  |- utils.ts         # parseBigIntEnv(), transactionFromInstructions()
.env
README.md

• Use devnet first by setting your Solana RPC
• Use low SOL and test tokens to validate swap logic
• Monitor logs to confirm transaction status