Two chains, the same open.

The launch, the lock, the 2–5% fee, the five-way split, the floor, and the rebate rules are the same on both chains. The asset you trade against is not.

Circle Arc

Chain 5042. Explorer at explorer.arc.io. A one-pair launch is the token against USDC. The rebate is that same USDC.

The pool uses the ERC-20 USDC at 0x3600000000000000000000000000000000000000. That token has 6 decimals. Gas on Arc is also called USDC, and the native gas token has 18 decimals. A figure in one is not a figure in the other. A million gas-units is not one USDC of the pool.

$PARC is on this chain. Its buyback spends the 6-decimal USDC. Burns of a user’s own tokens go to the dead address, because a transfer of value to the zero address does not succeed here.

Robinhood Chain

Chain 4663. Explorer at robinhoodchain.blockscout.com. Gas, the one-pair quote, and the rebate are native ETH. The pool currency is the zero address. WETH is not the pair.

USDG is the dollar price of ETH when a launch is priced. It is not a trading pair, it is not the rebate, and it is not something the site asks you to hold.

A stock launch is one pool against that stock. Buying with ETH on the site is two swaps: ETH to the stock, then the stock to the token. Selling is the reverse. The stock pool is the trade the indexer records.

A multi launch can open ETH plus up to four other quotes. Each quote is its own pool and its own bid. A sell prefers the pool that can pay, then converts that quote to ETH when the quote has a price pool. A quote with no bid is skipped.

What does not change

• About a $5,000 open. One billion tokens. 18 decimals. No mint.
• No launch fee. No hook. The launch position stays locked.
• Pool fee 2% to 5%, default 3%, on buys and on sells.
• Collected fees split 30% floor, 30% rebates, 15% Labs, 15% $PARC, 10% creator.
• An extra 0.15% only on swaps this site builds.