Memecoin Launchpad & Raydium Integration

Overview

This project enables the creation, funding, and launch of memecoins on Solana using Neon EVM, with seamless integration to Raydium for automated liquidity provisioning. It combines Ethereum-style smart contracts with Solana’s native token and AMM (Automated Market Maker) infrastructure.

Architecture Components

Ethereum Side (Neon EVM)

• TokenFactory.sol

Smart contract for token creation, funding, and trading logic.

• IERC20.sol & IERC20Metadata.sol

Standard ERC-20 interfaces for token interactions.

• Bonding Curve

Custom algorithm for dynamic token pricing during funding.

Solana Side

• WSOL Token Mint

Used as the finding asset in the launchpad.

• SPL Token Accounts (ATAs)

Created for WSOL and the new memecoin to allow token transfers.

• Raydium SDK v2

Used for creating CPMM (Constant Product Market Maker) pools and managing liquidity.

Deployment

Prerequisites

• Solana CLI installed
• Node.js and npm
• Hardhat setup for Neon EVM
• Raydium SDK dependencies
• ANCHOR_WALLET environment variable pointing to your Solana wallet (e.g., ./id.json)
• .env with private keys and sensitive config
• Funded Solana and Neon accounts

Deployment Steps

1. Deploy Smart Contracts (Neon EVM)

What it does:

• Deploys BondingCurve and TokenFactory
• Saves addresses and config to config.json
• Sets curve constants and fee logic

Run this command:

npx hardhat run scripts/MemecoinLaunchpad/deploy.js --network neondevnet

2. Demo Token Launch with Raydium Integration

What it does:

• Creates a new token via TokenFactory
• Generates ATAs for WSOL + new token
• Simulates:
  • Partial token purchase (25%)
  • Token sale (50%)
  • Final purchase to meet funding goal

Automatically creates a CPMM pool on Raydium

• Locks liquidity into the pool
• Changes token status to TRADING

Run this command:

npx hardhat run scripts/MemecoinLaunchpad/demo.js --network neondevnet

Alternative (with wallet):

ANCHOR_WALLET=./id.json node demo.js

Contracts Overview

1. BondingCurve.sol

Implements the pricing algorithm:

price = a * supply^2 + b * supply

Used during the funding phase for dynamic pricing.

2. TokenFactory.sol

Manages:

• Token deployment
• Token funding lifecycle
• Raydium integration (via cross-chain calls)

3. ERC20ForSplMintable.sol

ERC-20 compatible token backed by Solana’s SPL token mint.

4. CallSolana.sol

Bridges Neon → Solana by issuing cross-chain messages using Neon’s composability.

Solana Integration

• Wraps WSOL into ERC20 format
• Creates token ATAs
• Interacts with Raydium pools programmatically
• Converts between EVM hex and Solana base58 addresses

Configuration Constants

Name	Value
WSOL_TOKEN_ADDRESS	0xc7Fc9b46e479c5Cb42f6C458D1881e55E6B7986c
ERC20_FOR_SPL_FACTORY_ADDRESS	0xF6b17787154C418d5773Ea22Afc87A95CAA3e957
BONDING_CURVE_A	1e15
BONDING_CURVE_B	2e15
FEE_PERCENT	300 (3%)
FUNDING_GOAL	0.1 SOL

Testing Flow

Step	Description
Token Created	Using TokenFactory
Initial Buy	Funds 25% of goal
Token Sell	User sells 50% of tokens
Final Buy	Fills the remaining 75%
Pool Creation	Raydium CPMM pool created
Liquidity Lock	Funds locked into the Raydium pool
Status Update	Token enters TRADING phase

Wallet Setup

Export Phantom Wallet private key:

1. Copy private key from Phantom

2. Edit convert-key.js:

const privateKey = [/* your key array */];

3. Run:

node convert-key.js

4. Secure it:

chmod 600 id.json

Set the wallet environment:

export ANCHOR\_WALLET=./id.json

Troubleshooting

Issue	Solution
Insufficient WSOL	Ensure wallet is funded with SOL & WSOL
Missing config.json	Run deploy.js first
Cross-chain error	Check address formatting (hex vs base58)
Raydium pool not created	Confirm token is fully funded

Resources

1. Neon EVM Docs
2. Raydium SDK
3. Solana Dev Docs
4. Blockscout for Neon

Disclaimer

This is a demo project for educational and testing purposes. Contracts have not been audited. Use at your own risk in production environments.