How Sprivio works

Launch a token

1. Fill in the name, symbol, supply and artwork. One transaction on the chain you pick — Robinhood Chain, Base, BNB Chain or Arc — creates the token and its bonding curve together. Tick "launch on all four" and you sign once per chain and get four independent contracts. Nothing is compiled in your browser and nothing is stored on our servers — the factory contract does the work on-chain, and its source is verified so you can read it.

2. Choose how much of the supply you keep (0–20%) and, optionally, how much you buy yourself in the same transaction. That opening buy settles at the opening price before anyone else can trade.

3. Confirm in your wallet. The token is then readable by anyone from the chain — it shows up in Launched tokens for every visitor, not just on your device.

The token has no admin, no extra mint, no upgrade hook and no transfer tax. Nobody — including us — can change it after launch.

Who gets the money

Every trade on the curve pays a 1% fee. The creator keeps 70% of it — and 90% for the first 100 launches on each chain, which is where we are right now. The rest is the platform's share, and it is our only recurring income.

Those two numbers are constant in the factory contract with no setter, so they cannot be changed after your token launches. Read them yourself, live from the chain, on the Proof page.

We are paid two ways instead. First, buys landing in the launch second pay a 99% penalty that decays to zero over 3 seconds — it exists to stop bots front-running a launch, and it is split evenly between the creator and us. Second, when a token raises enough to graduate, we take 2% of the raise at that moment.

That means we only earn when a launch actually works. A creator can also set their own trade tax of up to 10% on top of the 1% — that one is paid to them in full and we take none of it.

Launching costs 0.0005 ETH on Robinhood Chain and Base, 0.002 BNB on BNB Chain, and 0.25 USDC on Arc. Bridging between any of the four is free — we take nothing on it.

The curve, and graduating

The public float sits in a bonding curve priced by a constant product with a virtual reserve, so a launch needs no funding to open. Every buy adds real ETH; every sell draws only on ETH that buyers actually paid in. The curve can never pay out more than it holds.

When the curve raises its target, it graduates: the ETH and the remaining tokens move into a Uniswap v4 pool, and the liquidity position ends up owned by a contract that has no code path to withdraw it. Selling stays open the whole time — before graduation on the curve, after it on the pool.

A creator may lock their own share until graduation. When they do, those tokens sit in the curve and are not for sale; anyone can verify it on-chain by reading lockedCreatorTokens() on the curve.

Bridging

Route: Base mainnet USDC → Arc USDC via Circle CCTP v2 fast transfer + auto-forward.

Sprivio charges nothing to bridge. No platform fee and no cut of the USDC. You only pay Circle’s forwarding fee in Base ETH and Base gas. Arc destination gas is paid by Circle on this route.

Fast quotes are live. Standard auto-delivery has been verified on mainnet (about 30 minutes in the first live test). Fast elapsed time is still being measured.

If Base confirms and Arc has not arrived, keep the original Base hash and use Resume. Do not submit a second burn.

Wallets

Installed browser wallets (MetaMask, OKX, Phantom and others) connect directly. Rainbow and Coinbase Wallet appear under Popular.