funsdk

A package for interacting with pumpfun fully typed.

Caution

THIS PACKAGE IS NOT PRODUCTION READY

expect breaking changes in the future

Instalation

npm i funsdk # any package manager should work

How to use

Initiate

import { Fun } from 'funsdk';
import { Connection, clusterApiUrl } from '@solana/web3.js';

const connection = new Connection(clusterApiUrl("mainnet-beta"));
const fun = new Fun(connection);

Warning

RENT EXEMPTION CHECK IS INCLUDED IN THIS FUNCTION

Please ensure that the creator account has enough SOL for rent exemption before executing any transaction.

Get Create Token Instruction

import { Fun, type TokenMeta } from 'funsdk';
import fs from 'fs';
import { Connection, clusterApiUrl, Keypair } from '@solana/web3.js';

// ... previous init code

const creator = Keypair.generate();
const token = Keypair.generate();

const imagePath = fs.readFileSync("./image.jpg", {encoding: "base64"});
const image = new File([imagePath], "image.jpg");

const tokenData: TokenMeta = {
    name: "ABC",
    symbol: "DEF",
    description: "GHI",
    image,
    keypair: token
    // socials if any...
};

/** 
 * If insufficient SOL is provided, the function will throw an error
 * 
 * This will return a TransactionInstruction instance
 * so you can freely assign the instruction to any type
 * of transaction that you like.
 * 
 * ex. Transaction | VersionedTransaction
 * **/
const createInstruct = await fun.compileCreateTokenInstruction({
    creator: creator.publicKey,
    tokenData
});

Warning

RENT EXEMPTION CHECK IS INCLUDED IN THIS FUNCTION

Please ensure that the creator account has enough SOL for rent exemption before executing any transaction.

Get token buy instruction

import { Fun } from 'funsdk';
import fs from 'fs';
import { Connection, clusterApiUrl, Keypair, LAMPORTS_PER_SOL } from '@solana/web3.js';

// ... previous init code
// ... previous create code

const buyAmount = Bigint(1 * LAMPORTS_PER_SOL);

/** 
 * If insufficient SOL is provided, the function will throw an error
 * If the token bonding curve account is not found, the function will throw an error
 * 
 * Same return value as before 
 * **/
const buyInstruct = await fun.compileBuyInstruction({
    trader: creator.publicKey,
    token: token.publicKey,
    solAmount: buyAmount
}, true); // set to true if this is the initial token buy, else empty

// If true was passed, function will include createAssociatedTokenAccount along with
// the buy instruction [createATA, buyInstruct]
     
// with type annotation. Same return as above
// fun.compileBuyInstruction<true>({
//     solAmount: BigInt(1 * LAMPORTS_PER_SOL),
//     token: token.publicKey,
//     trader: creator.publicKey
// })

Get token sell instruction

import { Fun } from 'funsdk';
import fs from 'fs';
import { Connection, clusterApiUrl, Keypair, LAMPORTS_PER_SOL } from '@solana/web3.js';

// ... previous init code
// ... previous create code

// Preferably build a function that fetches your token balance
// and do some calculations for the sell amount
const sellAmount = 1000000n;

/** 
 * Same return value as before
 * 
 * this will return Error if the token bonding curve account
 * is not found
 *  **/
const sellInstruct = await fun.compileSellInstruction({
    trader: creator.publicKey,
    token: token.publicKey,
    tokenAmount: sellAmount
}, true);

API

.compileCreateTokenInstruction Use to compile a create token instruction for pumpfun program

• async
• Params [object]
  • creator: [PublicKey]
  • tokenMeta: [object]
    • name: [string]
    • symbol: [string]
    • description: [string]
    • image: [File]
    • twitter?: [string]
    • telegram?: [string]
    • website?: [string]

.compileBuyInstruction Use to compile a buy token instruction for pumpfun program

• async
• Params [object]
  • solAmount [bigint] - Buy value in sol amount
  • trader [PublicKey] - The assign trader public key
  • token [PublicKey] - The assign token public key
• isInitial [boolean] - is initial token buy
  • default false

.compileSellInstruction Use to compile a sell token instruction for pumpfun program

• async
• Params [object]
  • tokenAmount [bigint] - Sell value in token amount
  • trader [PublicKey] - The assign trader public key
  • token [PublicKey] - The assign token public key

Types

interface TokenMetadataResponse {
    metadata: {
        name: string
        symbol: string
        description: string
        image: string
        showName: boolean
        createdOn: string
    }
    metadataUri: string
}

interface TokenMeta {
    keypair: Keypair;
    name: string;
    symbol: string;
    image: File;
    description: string;
    telegram?: string;
    twitter?: string;
    website?: string;
}

interface CreateTokenInstructionParam {
    creator: PublicKey;
    tokenMeta: TokenMeta;
}

interface TradeInstructionParam {
    trader: PublicKey;
    token: PublicKey;
    amount: bigint;
    slippageCut: bigint;
}

interface BuyInstructionParam {
    trader: PublicKey;
    token: PublicKey;
    solAmount: bigint;
}

interface SellInstructionParam {
    trader: PublicKey;
    token: PublicKey;
    tokenAmount: bigint;
};

Author

on1force

License

MIT

This project was created using bun init in bun v1.1.20. Bun is a fast all-in-one JavaScript runtime.