Neon EVM x Raydium Token Launchpad

Overview This project is a hybrid launchpad that leverages the EVM compatibility of Neon on Solana to collect funds using a bonding curve model and subsequently transfers liquidity to Raydium (a Solana-based AMM/DEX). The launchpad is designed to allow users to participate in token launches with dynamic pricing, ensuring fair allocation and instant post-launch liquidity.

Deployment Transaction: https://neon-devnet.blockscout.com/tx/0x476e039ce52a765d36545732d5d45c74349ed9aa2640cba7ce5bd8beceebcc8d Contract Address: https://neon-devnet.blockscout.com/address/0x73028149ccC43b5781faE7f1E1da6D03572673ec

🔁 Lifecycle Overview Funding via Bonding Curve on Neon EVM Users buy tokens during the funding phase. Token price increases with demand based on a bonding curve.

Liquidity Creation on Solana/Raydium After sale completion, collected USDT and minted tokens are bridged and liquidity is created on Raydium.

LP Token Handling LP tokens can be locked in a contract, sent to a DAO, or distributed proportionally to contributors.

⚙️ Components

1. RasieFunding.sol Main funding contract that:

Accepts USDT.

Mints ERC20 tokens dynamically based on a bonding curve.

Handles logic for forwarding funds and tokens to Raydium.

2. LaunchERC20.sol Factory contract to:

Deploy a new ERC20 token per project.

Set parameters such as name, symbol, and max supply.

3. solanaInteraction.sol (via composability libraries) Calls Solana programs to:

Bridge assets.

Create Raydium liquidity pools.

Sync liquidity metadata.

Bonding Curve Logic We use a linear bonding curve:

price = basePrice + slope * totalMinted

basePrice = Initial price per token (e.g., 1.0 USDT)

slope = Increase in price per token minted (e.g., 0.001 USDT/token)

totalMinted = Tokens minted so far

cost = n * basePrice + slope * (n * x + n(n-1)/2)

Benefits Composability Across Chains Use familiar Solidity tools on Neon EVM.

Tap into deep liquidity on Raydium after sale ends.

Better Token Economics Bonding curve enables price discovery.

Contributors gain exposure to token + future LP rewards.

Instant Liquidity Once the cap is reached or sale ends, liquidity is atomically created on Raydium.

Solves the typical post-IDO “no liquidity” issue.

Fully Onchain & Non-Custodial Contracts handle token issuance, pricing, funds collection, and liquidity creation.

No human intervention is required post-deployment.

Sample Simulation Let's walk through a funding simulation:

Parameters:

Sale cap = 300,000 NLT

Base price = 1 USDT

Slope = 0.001 USDT/token

Accepted token = USDT

Step 1: First Buy User wants to buy 150,000 NLT tokens:

cost = 150,000 * 1 + 0.001 * (150,000 * 0 + 150,000 * 149,999 / 2)
     = 150,000 + 0.001 * (11,249,925,000)
     = 150,000 + 11,249.93 = 161,249.93 USDT

The contract calculates this, transfers USDT, and mints 150,000 NLT to the user.

Step 2: Second Buy Another user buys remaining 150,000 NLT:

Starting totalMinted = 150,000
cost = 150,000 * 1 + 0.001 * (150,000 * 150,000 + 150,000 * 149,999 / 2)
     = 150,000 + 0.001 * (22,500,000,000 + 11,249,925,000)
     = 150,000 + 33,749,925 = 183,749.93 USDT

Tech Stack Layer Tech Smart Contracts Solidity on Neon EVM Bridging Neon Composability Layer Solana Interaction Raydium pool contracts (IDL + custom bindings) Frontend Hardhat / Forge + ethers.js Token ERC20 Funding Asset USDT (Neon-compatible)