LET'S TALK

A fair-launch bonding-curve token platform on Ethereum

Vellos is a pump.fun-style fair-launch platform on Ethereum. Anyone can launch a token that trades instantly on an on-chain bonding curve — price rises as demand buys in and falls as holders sell, with no seeded liquidity and no team allocation. When a token's curve fills, its liquidity graduates automatically into an AMM pool. A live TradingView chart is driven directly from on-chain trades through an oracle- and WebSocket-backed price pipeline.

What I owned

  • Designed and built the bonding-curve contracts in Solidity — a constant-product, virtual-reserve curve where price is set purely by supply and demand (a buy pushes price up, a sell pulls it down), with no pre-seeded liquidity.
  • Derived the curve math from the white papers: the closed-form cost/proceeds for any trade against the virtual reserves (X·Y = k), so every buy and sell prices deterministically on-chain.
  • Built a token factory that launches each coin and its curve as a cheap minimal-proxy clone with deterministic addresses.
  • Implemented automatic graduation — once a curve sells out, the accumulated liquidity migrates into an AMM pool and the LP is locked, so trading continues seamlessly off the curve.
  • Built the real-time price pipeline: an indexer streams the on-chain buy/sell events, aggregates them into OHLC candles, and pushes them over WebSockets to a TradingView chart fed straight from contract data.
  • Wired a Chainlink ETH/USD oracle to turn on-chain ETH reserves into a live USD market cap — used for both the graduation threshold and the UI.
  • Delivered the React/Next.js trading front-end: wallet connect, buy/sell with slippage, and the live candlestick chart.
  • Chain Ethereum · Solidity
  • Curve Constant-product · virtual reserves
  • Pricing 100% on-chain · no seeded LP
  • Live data On-chain events → TradingView
CREATOR launches a token TOKEN FACTORY EIP-1167 clone BONDING CURVE buy / sell on-chain AMM POOL graduated · LP locked launches graduate PRICE ↑ TOKENS SOLD → price = X / Y buy Δy → pay X·Δy / (Y − Δy) virtual reserves · X · Y = k each BUY moves up the curve · each SELL moves down GRADUATION curve fills → migrate to AMM
The bonding curve — price is pure supply & demand, then liquidity graduates to an AMM
BONDING CURVE emits Buy / Sell INDEXER viem · Ponder OHLC CANDLES Timescale / Redis WEBSOCKET live stream TRADINGVIEW candlestick chart events aggregate push render WALLET wagmi · viem CHAINLINK ETH / USD oracle USD MARKET CAP graduation + UI buy / sell USD mcap
How the live TradingView chart is driven straight from on-chain trades
▶ WALKTHROUGH

Loom walkthrough of the architecture: launch a token, trade it up the bonding curve, watch the live chart move, and hit graduation into the AMM. Record it and drop the embed URL into caseStudies.ts.

Architecture walkthrough (Loom)
Vellos key visual
Key visual