Build with LaunchX

LaunchX is a permissionless bonding-curve token launchpad on Robinhood Chain (EVM). Anyone can create a token, trade it on an on-chain curve, and graduate liquidity to LaunchX DEX when the USD target is hit.

The product flow is simple:

1. Create: deploy a fair launch with the full supply on the curve (no team allocation).
2. Trade: buy and sell against the bonding curve with transparent fees.
3. Graduate: when the USD graduation target is reached, liquidity moves to Uniswap V3 and the LP position is locked.

LaunchX is not financial advice, a fund, or a return guarantee. Tokens can lose value. Do your own research before launching or trading.

Prerequisites

• An EVM wallet (MetaMask, Rabby, or similar).
• ETH on Robinhood Chain for gas (and for any buy amount).
• Wallet set to Robinhood Chain. See Network and wallets if you need to add the chain.

Launch a token (creators)

1. Connect your wallet from the LaunchX navbar.
2. Open Launch and fill name, symbol, logo, and optional socials.
3. Set your USD graduation target (default $15,000) and creator fee (default 0.5%, max 1%).
4. Optionally add a first buy in ETH so you hold some supply at create.
5. Confirm the transaction. Deploy fee is 0 ETH (you pay gas only).

Expected result: your token page opens, the curve is live, and bonding progress shows how close you are to graduation.

Trade a token (traders)

1. Browse Explore or open a token from the home feed.
2. On the token page, choose buy or sell, enter amount, and confirm in your wallet.
3. Default UI slippage is 1%. Curve fee at defaults is 1% total. See Fees.
4. Sign in with your wallet (SIWE) if you want portfolio history, comments, or other authenticated features.

Expected result: the trade confirms on-chain, the chart and bonding progress update, and your balance reflects the fill.

Troubleshooting

• Wrong network: use the in-app banner to switch or add Robinhood Chain, or add it manually.
• Transaction rejected: check ETH for gas and that slippage is not too tight.
• USDG toggle missing: curve USDG needs LaunchZap configured; ETH trading always works on the curve.

Launch and trade only work when your wallet is on the LaunchX-configured chain (Robinhood Chain in production).

Mainnet

rpc.mainnet.chain.robinhood.com · chain ID 4663

Testnet

rpc.testnet.chain.robinhood.com · chain ID 46630

Native currency

ETH (18 decimals)

Mainnet explorer

https://robinhoodchain.blockscout.com

Testnet explorer

https://explorer.testnet.chain.robinhood.com

Connect and switch

1. Connect an injected wallet (MetaMask, Rabby, and similar work without WalletConnect).
2. If you are on the wrong chain, LaunchX shows a banner. Use Switch / add network, or expand manual params and copy them into your wallet.
3. Some wallets (for example Phantom EVM) may not support wallet_addEthereumChain. Add the network manually using the banner values or Robinhood's guide: Add network to wallet.

Mobile WalletConnect needs a WalletConnect project ID configured for the app. Injected desktop wallets do not.

You need ETH for gas on every launch and trade. Buys also require the ETH (or USDG, when available) you want to spend.

Before graduation, price discovery happens on a constant-product bonding curve with virtual reserves. Pricing is computed on-chain only. The UI reads that state; it does not invent a price.

Total supply

1,000,000,000 tokens. Full supply sits on the curve. No team allocation.

Sellable on curve

800,000,000 tokens.

DEX LP floor

200,000,000 tokens reserved for liquidity at graduation (not sellable on the curve).

Virtual token reserve

1.073B (pump.fun-style base).

Virtual native

Derived per token from the USD graduation target so sold-supply exhaustion lines up with the ETH threshold.

If a buy would take more ETH than the remaining sellable reserve needs, the curve fills what it can and refunds unused ETH.

Bonding progress on the token page shows how close real native raised is to the graduation threshold.

Fees are transparent and set in protocol defaults. Creator fee is chosen at launch within a capped range.

Curve protocol fee

0.5% (50 bps) to the platform.

Curve creator fee

Default 0.5% (50 bps). Creators can set 0-1% (0-100 bps) at create. Platform fee stays 0.5%, so total curve fee is 0.5-1.5%.

Default total on curve

1% (0.5% protocol + 0.5% creator).

Deploy / create fee

0 ETH. You pay network gas only.

Graduated DEX (Uniswap V3)

0.3% pool fee tier (3000).

USDG on curve

About 1.3% all-in: curve fee plus a Uniswap V3 USDG↔WETH hop via LaunchZap.

Default UI slippage

1% (100 bps). Adjustable per trade.

V3 LP fee collection

After graduation, pool fees can be collected via the liquidity locker and split between platform and creator.

Each launch picks a USD/USDG graduation target. At create, an ETH/USD oracle snapshots that target into an ETH threshold so the curve knows when to graduate.

• Default target: $15,000 (configurable per launch).
• Graduation triggers when real native reserve reaches the ETH threshold or when sellable supply on the curve is exhausted.
• Production path: liquidity migrates to a Uniswap V3 full-range pool. The position NFT goes to LiquidityLocker.
• After migration, the bonding curve closes. Trading continues on the DEX (ETH single-hop or USDG multi-hop).

If migration fails, the token can sit in a graduation-pending state. Protocol owners can retry graduation on-chain. Traders should treat pending graduation as a pause between curve and DEX liquidity, not as a guarantee of timing.

Local / offline development may use a SimpleDEX graduation adapter instead of Uniswap V3. Production on Robinhood Chain uses Uniswap V3.

The bonding curve itself is ETH-native. USDG is supported through periphery routers so you can pay or receive stable units without changing curve math.

ETH on curve

Router.buy / Router.sell against BondingCurve.

USDG on curve

LaunchZap swaps USDG↔WETH on Uniswap V3, then buys or sells on the curve. Requires LaunchZap to be configured.

After graduation

ETH via Uniswap V3 (or SimpleDEX in local fallback). USDG via multi-hop USDG ↔ WETH ↔ TOKEN.

Price and volume

Reported in ETH terms even when you zap with USDG. The ETH that hits the curve is what counts.

If LaunchZap is not deployed for the current environment, the UI hides the USDG toggle and ETH trading remains available.

LaunchX is designed for fair, transparent launches. That is not the same as risk-free.

What the protocol enforces

• Full supply starts on the bonding curve. No hidden team allocation at create.
• At graduation, liquidity is locked (Uniswap V3 NFT in LiquidityLocker in production).
• Create requires a fresh enough ETH/USD oracle reading to snapshot the USD target.
• Trades settle on-chain. The API records confirmed receipts; it does not mint price.

What we do not claim

• Independent security audits are not published in this repository yet. Do not treat LaunchX as "audited" until reports are available.
• No returns, "guaranteed moons," or protection from token failure.
• Permissionless tokens can be rugs by social or market means even when LP is locked. Always research the team, narrative, and liquidity.

Crypto assets are volatile. LaunchX is a permissionless protocol. This page is product documentation, not financial, legal, or investment advice.

The LaunchX backend is a JSON API with wallet auth. Responses use { success, data, error? }.

Auth

1. POST /auth/nonce with your wallet address.
2. Sign the SIWE-style message in your wallet.
3. POST /auth/login with wallet, signature, and message to receive a JWT.
4. Send Authorization: Bearer <token> on protected routes.

Main route groups

• Tokens: list, trending, new, detail, chart, trades, holders, comments, create (JWT).
• Trading: POST /buy and POST /sell record confirmed on-chain receipts by tx hash (JWT). Execution happens in the wallet first.
• Portfolio / social: portfolio, comments, follows, notifications (JWT where noted).
• Discovery: leaderboard, stats, search.

Realtime (Socket.IO)

• newBuy / newSell
• priceUpdate / newToken
• leaderboardUpdate / portfolioUpdate

Default rate limit: 120 requests per 60 seconds per client. Chart intervals: 1s, 1m, 5m, 15m, 1h, 4h, 1d (default 1m).

Full request and response shapes live in the repo at docs/api.md for contributors integrating against a local or deployed API.

Bonding curve

On-chain constant-product market that prices the token before graduation using virtual and real reserves.

Virtual reserves

Starting reserves that shape early price without requiring real inventory. Virtual native is derived from the USD graduation target.

Sellable reserve

The 800M tokens available to buy on the curve. The remaining 200M is reserved for DEX LP at graduation.

Graduation

Migration from the bonding curve to DEX liquidity when the ETH threshold is hit or sellable supply is exhausted.

USD target snapshot

At create, the chosen USD graduation target is converted to an ETH threshold using the ETH/USD oracle.

Creator fee (bps)

Optional creator share of each curve trade, set at launch in basis points (0–100 bps). Default 50 bps.

LaunchZap

Periphery contract that routes USDG through WETH into curve buys/sells without changing BondingCurve itself.

LiquidityLocker

Holds the Uniswap V3 position NFT after graduation so LP cannot be pulled by the creator.

SIWE

Sign-In with Ethereum. Wallet signature that unlocks JWT-authenticated API features such as portfolio and create indexing.

Bonding progress

UI measure of how close real native raised is to the graduation threshold.

Graduated

Token status after successful liquidity migration. Curve trading is closed; DEX trading is open.

Canonical Robinhood Chain mainnet addresses used by LaunchX. Confirm on the explorer before sending funds. Token contract reference: Robinhood Chain contracts.

Chain ID

4663

RPC

https://rpc.mainnet.chain.robinhood.com

Explorer

https://robinhoodchain.blockscout.com

WETH

0x0Bd7D308f8E1639FAb988df18A8011f41EAcAD73

USDG

0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168

Uniswap V3 Factory

0x1f7d7550B1b028f7571E69A784071F0205FD2EfA

Position manager

0x73991a25c818bf1f1128deaab1492d45638de0d3

SwapRouter02

0xCaf681a66D020601342297493863E78C959E5cb2

Testnet chain ID

46630

Testnet RPC

https://rpc.testnet.chain.robinhood.com

Testnet explorer

https://explorer.testnet.chain.robinhood.com

Protocol contract addresses (Router, Factory, LaunchZap, and so on) depend on the deployment environment and are configured via app env, not hard-coded here.