How CAST works, in plain words.
CAST launches tokens whose fees, limits and every future change are sealed into the contract before the first buy. Each token trades against one asset, chosen at launch: ETH, USDG or a stock token. It starts on a bonding curve and graduates into a locked Uniswap v4 pool. These docs explain the rules, show you how to trade and launch, and give developers everything needed to build on it.
Start here
Key facts
- Network
- Robinhood Chain
- Chain ID 4663
- Supply
- 1,000,000,000
- Fixed for every token, 18 decimals
- Start
- Bonding curve
- Graduates into its Uniswap v4 pool at about $10,000 raised
- Liquidity
- Locked forever
- Added at graduation. Nobody can add more or remove it
- Owner
- None
- owner() returns the zero address
- CAST's share
- 20% of fees
- The other 80% is split as the creator sealed it
Launcher 0xFc7931816e1b9ddc87B6C284765B5AFD593F0404. See Network and contracts for the rest.
A launch, start to finish
Every CAST token moves through the same four stages, in order, and never goes back. The rules for each stage are fixed at launch. Separately, every token starts on a bonding curve and graduates into its pool once the curve has raised its target, whatever stage it's in.
- 01LaunchThe launch block
The token, its bonding curve and its pool are created, and the creator can make the first buy.
- 02ShieldUp to 24 hours
Buy and sell fees may go up to 25%, to make sniping expensive.
- 03GrowthUntil the end date
Fees move along their sealed schedules toward their final values.
- 04Locked InForever
Every time-based rule stays at its last value. A Hold Streak sell fee still follows each seller's streak.
All docs
Get started
Concepts
- Sealed rulesEvery fee and limit is a schedule written into the token before the first buy.
- StagesLaunch, Shield, Growth and Locked In: the four stages every token moves through.
- Fees and Bot TaxThe three fees a trade can pay, who receives them, and a worked example.
- Hold StreakHow long you've held, and how it can lower your sell fee.
- Holder rewardsHolders earn a share of every fee in the token's paired asset, streamed out within 24 hours.
- TemplatesFour ready-made rule sets, what each one charges and how it grades.
- Fairness gradeHow the Rulebook scores a token's rules from A to F.
- Safety limitsThe limits the Rulebook enforces on every launch.
Developers
- Network and contractsChain settings, contract addresses, pairs and protocol constants.
- ArchitectureHow the Launcher, Fee Hook, Router, Quoter, Rulebook, pair list and token fit together, and how a token graduates.
- Reading token stateRead rules, stages, fees, grades and wallet positions with viem.
- Quotes and tradesQuote a trade with the Quoter and buy or sell through the CAST Router.
- Events and indexingEvents the contracts emit and how to index launches and trades.