pumpfun-trading

PumpFun Trading

Execute buy and sell trades on the Pump.fun protocol using the native Pump SDK. Supports both bonding curve trading (pre-graduation) and AMM pool trading (post-graduation).

Prerequisites

• Funded Solana wallet via nanosolana birth
• HELIUS_RPC_URL configured
• Understanding of bonding curve mechanics

Trading Flow

1. Check Token State

Before trading, always check if the token is on the bonding curve or has graduated:

const sdk = new OnlinePumpSdk(connection);
const summary = await sdk.fetchBondingCurveSummary(mint);

if (summary.isGraduated) {
  // Use AMM trading instructions
} else {
  // Use bonding curve trading instructions
}

2. Buy on Bonding Curve

import { OnlinePumpSdk, getBuyTokenAmountFromSolAmount } from "nanosolana";
import BN from "bn.js";

const sdk = new OnlinePumpSdk(connection);

// Fetch state
const [buyState, global, feeConfig] = await Promise.all([
  sdk.fetchBuyState(mint, user),
  sdk.fetchGlobal(),
  sdk.fetchFeeConfig(),
]);

// Calculate expected tokens
const solAmount = new BN(100_000_000); // 0.1 SOL
const expectedTokens = getBuyTokenAmountFromSolAmount({
  global, feeConfig,
  mintSupply: buyState.bondingCurve.tokenTotalSupply,
  bondingCurve: buyState.bondingCurve,
  amount: solAmount,
});

// Build instructions
const buyIxs = await sdk.buyInstructions({
  ...buyState, mint, user,
  amount: expectedTokens,
  solAmount,
  slippage: 0.05, // 5%
});

3. Sell on Bonding Curve

import { getSellSolAmountFromTokenAmount } from "nanosolana";

const [sellState, global, feeConfig] = await Promise.all([
  sdk.fetchSellState(mint, user),
  sdk.fetchGlobal(),
  sdk.fetchFeeConfig(),
]);

const tokenAmount = new BN(1_000_000_000);
const expectedSol = getSellSolAmountFromTokenAmount({
  global, feeConfig,
  mintSupply: sellState.bondingCurve.tokenTotalSupply,
  bondingCurve: sellState.bondingCurve,
  amount: tokenAmount,
});

const sellIxs = await sdk.sellInstructions({
  ...sellState, mint, user,
  amount: tokenAmount,
  solAmount: expectedSol,
  slippage: 0.05,
});