masstart.fun — launch a coin on zkSYS

what this has and has not been through

These contracts have not been audited by a third party. They are read, tested and statically analysed, and that is not the same thing. This is a testnet: the tokens here are not money and the chain can be reset.

What the contracts have been through, so the sentence above is not read as either more or less than it is: 128 tests that run before every deploy, a static analysis pass over every contract with each finding triaged by hand, and a line-by-line read recorded in the project’s own audit document. None of that is a third party putting their name to it, which is the thing an audit is.

The contracts cannot be changed after deployment. There is no upgrade path, no proxy and no admin key that can alter how a sale works. That is the point, and it is also the risk: a mistake found later cannot be patched, only abandoned.

using this site

This is a testnet. The tokens here are not money. They cannot be sold for anything, zkSYS Genesis Testnet can be reset, and if it is, everything launched here goes with it. Nothing on this site is an investment, an offer of one, or advice about one.

You hold your own keys. The site never asks for a private key or a seed phrase and could not use one if you gave it. Nobody here can move your tokens, reverse a transaction or recover a wallet you have lost access to — not because of a policy, but because there is no mechanism.

Every transaction is yours. You sign it, it is final when the chain accepts it, and the price you get is whatever the contract computes at the moment it runs. A commitment to a mass start cannot be cancelled.

Names and messages can be removed. Posting is governed by the banterbunch rules, which you accept when you buy a name — the version you accepted is recorded with the date. A name or a message that breaks them can be taken down, and the fee paid for a name is not refunded.

Anyone can launch anything. A coin appearing here is not an endorsement of it, and a ticker is not reserved: somebody else can launch the same one tomorrow. The board marks copies and ranks them below the original, which is a signal and not a guarantee.

Who you are agreeing with, and who may use this

This agreement is between you and Mr Roommaster, who operates masstart.fun and can be reached at support@masstart.fun. Using the site means accepting what is on this page.

You must be 18 or older and legally able to agree to this where you live, and you must not be somewhere that using a site like this is against the law, or be a person that sanctions law forbids dealing with. There is no account and no identity check, so this is a condition you accept rather than something the site verifies.

Fees

Fees are fixed in the contract and identical for every coin. A creator cannot change them for their own coin, and neither can the site — they are not settings, they are what the deployed code does.

1% on every ladder trade, charged on both sides. Of that, 30% goes to the coin’s creator — 0.3% of the trade — and the rest to the protocol.
0.25% on every swap once a coin has graduated to a pool: 0.15% to the creator, 0.05% to the protocol, and the remainder stays in the pool.
10% of the settlement fee to whoever settles a launch, and the same share of the graduation skim to whoever opens the pool. Both are transactions somebody has to send and nobody is obliged to; paying the sender is what stops a coin sitting closed.
A name is paid for once and the fee is not refunded, including if the name is later taken down under the rules.
Network gas, on every transaction, which goes to the chain and not to this site.

These figures are read from the same file the contracts are checked against, so the page cannot quote a fee the contract does not charge.

What you must not do here

Break the law where you are, or use the site to help anyone else do so.
Launch a coin, buy a name or post anything that impersonates somebody, infringes their rights, or is designed to deceive people about what they are buying.
Post abuse, threats, or anything unlawful. The banterbunch rules cover this in detail and you accept them when you buy a name.
Attack the site or the contracts, probe them for weaknesses against other people’s money, or use bots or scripts to flood any part of it.
Claim an association with this site that does not exist, or present it as endorsing a coin. It endorses none of them.

What you post stays yours

Your bio, banner, picture, messages and anything you attach to a coin remain yours. By posting them you allow this site to show them to other people, which is the only thing it does with them — there is no other use, no licence to anybody else, and nothing is sold.

Names and messages can be taken down under the rules, and a wallet can be barred from posting. The chain is a separate matter: a coin that has launched has launched, and nobody can undo that.

The trial wallet and the bridge

The trial wallet exists so you can make a first trade without installing anything. Its key is kept in one browser, it cannot be recovered by anyone, and clearing that browser destroys it and whatever is in it. It is deliberately limited — it cannot launch a coin or buy a name — and the Security page says why in full. Use it to try the site, not to hold anything.

The bridge is a prototype and says so on its own panel. It moves real testnet value across three chains using infrastructure nobody here operates — the chains themselves, their nodes, and a message bridge between them. A transfer can take hours, can stall in a place this site cannot reach into, and the withdrawal route has steps that have not yet been run against the live testnet. Use small amounts.

No warranty, and what cannot be promised

The site is provided as it is, with no warranty of any kind, and without any promise that it will keep working or stay available. The contracts have not been audited — the notice at the top of this page says what that means.

Nothing here is liable for losses from the value of a token, a transaction you signed, a chain reset, a bug in the contracts, a bridge that did not deliver, or a wallet you lost access to. That is not a disclaimer chosen over a better alternative: on a public chain, with keys you hold, there is no mechanism by which anyone here could make it right even if they wanted to.

Where the law where you live gives you rights that cannot be signed away, you keep them, and nothing on this page is meant to say otherwise.

Ending it, and changes

You can stop using the site at any time; there is no account to close. Access can be restricted and names and messages removed where the rules are broken. Neither affects the chain, which nobody controls.

These terms change as the site does. The version in front of you is the one that applies, and a change that narrows what you are agreeing to will be said in the rooms rather than only here. Questions, or anything you want taken down, go to support@masstart.fun.

what the server keeps

This site used to say “nothing is stored on our side”. That was not true, and the list below is what is actually kept. It is checked against the code on every build, so it cannot quietly go out of date the way that sentence did.

There is no account. Signing in is a signature from your wallet, so everything here is keyed to a wallet address rather than to a person — but a wallet address is public and permanent, and anything you attach to it is attached in public.

Responsible for this site: Mr Roommaster, support@masstart.fun.

Kept, and tied to your wallet

Everything said in the banterbunch and in the coin rooms, with the wallet that said it and when.
The name a wallet has paid for.
Which names are already owned, so two people cannot hold the same one.
The picture a wallet has set, stored as the image itself.
What a wallet says about itself: a short bio, links to X, Telegram, Instagram, TikTok, SuperDapp and a website, and a banner.
Which wallet liked a message — and, from before likes replaced the up and down arrows, which wallet voted one down.
Which emoji a wallet put on a message.
Which wallets reported a message.
That a wallet accepted the banterbunch rules, when, and which version of them.
Wallets barred from posting.
The transaction hash of each name payment, so the same payment cannot buy two names.
The newest message mentioning a wallet that it has already looked at, so the badge knows what is new.
The coins a wallet has starred, so the list follows it to another device.
A browser's push subscription, if it was asked for, and the wallet it belongs to.
Which kinds of push notification a wallet asked for.
The note a creator has pinned to their own coin.
A bridge transfer a wallet asked to be told about: which leg it is on, when it started, and the wallet it belongs to. Dropped when it arrives, and after seven days either way.
The masstart wallet a Pali wallet moved its name and profile from, so the old one can still be shown until it is empty.
Which wallets have taken a starter grant, so each is given one once.

Kept, and about nobody

How many people have had a message on screen — as hashes, behind a secret this server generates and never publishes. It is deliberately one-way: the count can say how many, and nothing can say who.
The secret those view hashes are made with. It never leaves the server.
The key sign-in sessions are signed with. The sessions themselves are not stored.
The next message number.
Which notifications have already gone out, so nothing is sent twice.
How much the starter grant has paid out today.
Which day that total is for.

Not kept

No cookies. The site sets none, and there is no consent banner because there is nothing to consent to.
No analytics, no tracking pixels and no third-party scripts of any kind.
No email address, no password and no account. Signing in is a signature from your wallet.
No IP addresses on disk. They are held in memory to rate-limit the routes that cost real work — sixty seconds for most of them, an hour for the starter grant — and are never written to a file.
No private keys, ever. The site never asks for one and could not use it if you gave it.

Everything on the chain — every launch, commitment, buy and sell — is public, permanent and outside this site’s control. Deleting something here does not remove it from the chain, because nothing can.

Kept in your browser, and nowhere else

Some of what this site holds about you never reaches the server at all. “We do not have it” is not the same as “it does not exist”, and the most consequential item on this site is in this list rather than the ones above.

The trial wallet's private key. It is made on this device, unlocked with your passkey, and never sent to the server — which also means nobody can recover it for you. Clear this browser and the wallet, and anything in it, is gone.
The token proving you signed in with your wallet, until you sign out or it expires.
A stand-in for the passkey prompt, used only when the site is running in demo mode for a screenshot.
The coins you have starred. Sent to the server only if you ask for the list to follow you to another device.
Whether you asked for that list to be synced.
A deposit in progress: which step it reached and the transaction hashes, so a reload does not lose it or send anything twice.
The same, for a withdrawal.
Your finished transfers, so the bridge can show a history. This one is never sent anywhere.
How far you got moving a trial wallet to Pali, so closing the page does not restart it.
The wallets you have muted in the rooms.
Whether the banterbunch is open, and how wide.
Whether the side navigation is expanded.
Which panels you have open on the board, and in what order.
How you last sorted and filtered the explore page.
The coins you looked at most recently, for the search box's shortcut list.
What you last searched for, for the same list.
Which time bands the masstarts panel is showing.
Which window of time the memes panel is showing.
Your display choices, such as reduced motion.
Your trade settings, such as slippage and whether to confirm before sending an order.
Which chart type you last used on a coin page.
Which timeframes you keep on the chart's toolbar.
Which indicators you have turned on.
Which of the two wallets you used last, so the sign-in offers that one first.
That you signed out deliberately, so the page does not reconnect you on the next load. Cleared when you sign in again.
How many times you have been here, which is what decides when the install prompt is offered.
Whether that prompt has been earned yet.
When you last dismissed it, so it stays away.

Nothing here is sent anywhere by the site, and nothing here can be recovered by anyone — including us. Clearing this browser’s data removes all of it.

What your browser asks of other people

Pages here are served from one server, but your browser talks to others to do the work. Each of them sees your IP address and what you asked for, and each has its own privacy terms, which this site does not control:

Chain nodes — zkSYS Genesis Testnet and, for the bridge, Syscoin Tanenbaum and Ethereum Sepolia. Every balance, price and transaction on screen is read from one of these.
Block explorers — only when you follow a view link, which opens their page.
Your browser’s push service — Google, Mozilla or Apple, depending on the browser, and only if you turn notifications on. The notification text passes through them.
Your wallet — Pali is an extension you installed; what it does with what it sees is between you and it.

There are no cookies on this site, no analytics, no advertising, no trackers and no third-party scripts. Nothing you do here is measured for anybody.

Why each thing is kept, and for how long

To run what you asked for — a message you posted, a name you bought, a profile you wrote. Kept until you ask for it to go, except where it cannot (see the chain, below).
To keep the place usable — reports, bans, rate limits and the record of which payment bought which name, so one payment cannot buy two. Kept while the site runs.
Bridge transfers you asked to be told about — dropped when they arrive, and after seven days either way.
Notifications — your subscription is kept until you turn them off or your browser invalidates it.
IP addresses — held in memory only, to limit how often one connection can ask for the starter grant, and never written to disk.

What you can ask for

If you are in the EU or the UK, the GDPR gives you the right to ask what is held about you, to have it corrected, to have it deleted, to get a copy, to object to it being held, and to complain to your data protection authority. You can exercise all of these from the wallet the data belongs to — a signature from that wallet is the only proof of identity this site has or wants.

Two honest limits. The chain cannot be edited by anyone, so a launch, a trade or a transfer stays where it is whatever either of us does. And what is kept in your browser is not ours to delete — clearing the browser is the only way, and it takes the trial wallet with it.

Children

This site is not for anyone under 18 and does not knowingly keep anything about anyone under 18. There is no age check — there is no account to check against — so this is a condition of use rather than something the site can enforce.

Who to ask, and when this changed

To have what is listed above removed, say so in the banterbunch or write to support@masstart.fun, from the wallet it belongs to.

This page is generated from the same list the code is checked against, so it changes when the site does. If a change narrows what you are agreeing to, it will be said in the rooms rather than only here.

Terms, privacy, and what this has not been through