Docs
Docs
Production reference for PumpRobin on Robinhood Chain — product mechanics, constants, contracts, and public reads.
Overview
PumpRobin is a fair-launch pad for Robinhood Chain. Every new token is created on-chain: the factory takes a 0.004 ETH creation fee and immediately seeds a locked Uniswap V3 TOKEN/WETH pool.
Flow: Sign createToken → Pay fee + LP seed → Locked Uniswap pool → Trade on DEX
Getting started
What is PumpRobin.fun?
A permissionless token launchpad on Robinhood Chain. Launch ERC-20s with instant locked Uniswap V3 liquidity — similar in spirit to pump.fun, built for an EVM L2.
How do I connect?
Use Connect in the header. Add Robinhood Chain (ID 4663, RPC https://rpc.mainnet.chain.robinhood.com) if your wallet does not auto-detect it.
What does a launch cost?
0.004 ETH creation fee plus at least 0.1 ETH LP seed, paid in the signed factory transaction, plus gas. Buys take a 2% token tax (1% creator + 1% platform). Uniswap pool fee is 1%.
Mechanics
Instant Uniswap pool
createToken deploys the ERC-20, forwards the creation fee, and calls seedInstantUniswap with the remaining ETH. ~70% of the seed locks as LP; the rest buys tokens for the creator. Excess supply is burned.
Locked liquidity
The Uniswap V3 TOKEN/WETH pool uses the 1% fee tier. The LP NFT is sent to the dead address so principal cannot be withdrawn. The token then trades like other Robinhood pairs on DEX Screener.
Creator fees
Buys take a 2% token tax — 1% to the creator wallet and 1% to PumpRobin, hardcoded on the token with no admin.
Launch mechanics
Optional guards and metadata available on every create. Full product narrative also lives on How it works.
On-chain create + fee
Launch is a signed PumpRobinFactory.createToken transaction. It must pay 0.004 ETH creation fee plus at least 0.1 ETH LP seed in that same tx. The API only indexes a confirmed factory receipt — it cannot mint a token from unsigned JSON.
Instant Uniswap V3 LP
Every new launch seeds a Uniswap V3 TOKEN/WETH pool at the 1% fee tier immediately. ~70% of the seed locks as LP; the rest buys tokens for the creator. Excess supply is burned. Trading is live on DEX Screener / GMGN from block one.
Locked liquidity
The Uniswap V3 LP NFT is sent to the dead address so principal cannot be withdrawn. Verify the pool and lock on Blockscout and DEX Screener.
2% buy tax
Buys (pool → wallet) take a hardcoded 2% token tax — 1% to the creator wallet and 1% to PumpRobin. No owner, pause, blacklist, or fee setter.
Dev buy / ownership
Raise the LP seed above the minimum to buy a larger first position in the same create transaction. Ownership presets on the launch form size that seed.
Socials & metadata
Add logo, name, ticker, description, website, X, Telegram, and an optional banner. They show on Explore and the token page so traders know what they're looking at.
Creator fees
Each Uniswap buy takes a 2% token tax — 1% to the creator wallet and 1% to PumpRobin. The tax is a contract constant (no admin).
PumpRobin also earns the 0.004 ETH creation fee, paid to the platform collector (0x61F928CBbc9b65C404C3DB42BDe403D78954aDD9) inside createToken. Uniswap's 1% pool fee accrues to the locked LP NFT.
1%
Creator share
Of each taxed buy (pool → wallet)
1%
Platform share
PumpRobin fee on each taxed buy
2%
Total buy tax
Hardcoded on the token contract
Fair by design
Trust comes from transparent math and contract-enforced rules — not marketing copy alone.
Fee paid on-chain
The 0.004 ETH creation fee is collected by the factory in the same signed transaction that deploys the token. Unsigned API posts cannot register a launch.
Locked Uniswap LP
Every launch seeds a Uniswap V3 1% TOKEN/WETH pool and sends the LP NFT to the dead address — principal is not withdrawable.
Hardcoded buy tax
Buys take 2% total — 1% creator + 1% platform. No owner, pause, blacklist, or fee switches.
Launch options recorded
Dev buy, socials, and optional flags are stored with the token so the UI can surface intent clearly.
Chain
Key constants
Contracts
Source lives in /contracts: PumpRobinFactory, BondingCurve (legacy helpers + instant seed), PumpRobinToken. New launches always go through createToken.
Factory
0xEcF4a7b8f79a133aCDF92dbA5Fbcd3CA29394bD2
Shared infra on Robinhood Chain: WETH 0x0Bd7D308…
Public APIs
Light JSON reads for catalog and stats. Writes only index confirmed factory transactions — see the developers page.
GET /api/tokens— token catalogGET /api/trades— trade historyGET /api/platform/stats— aggregatesGET /api/analytics— series for charts
FAQ
How much does it cost to launch a token?
0.004 ETH creation fee plus at least 0.1 ETH LP seed, paid in the same signed createToken transaction, plus gas.
Where do creator fees go?
Each Uniswap buy takes a 2% token tax — 1% to the creator wallet and 1% to PumpRobin. Both are hardcoded on the token.
Do I need to deploy my own API?
No. Use the site UI, call public JSON reads, or send createToken on the factory yourself. POST /api/tokens only indexes a confirmed factory transaction.
Are launches on-chain today?
Yes. PumpRobinFactory.createToken deploys the token, takes the creation fee, and seeds locked Uniswap V3 liquidity in one transaction.
Where is Uniswap liquidity?
At create time the factory wraps the seed into a Uniswap V3 TOKEN/WETH pool at the 1% fee tier and locks the LP NFT at the dead address. The token page routes trades via the Uniswap Trading API.
Are fees transparent?
Yes — 0.004 ETH creation fee at launch, 2% buy tax (1% creator + 1% platform), and Uniswap's 1% pool fee on the locked LP.