How float works

The problem float exists for

Robinhood Chain is built for tokenized stocks. The people it is for arrive holding NVDA, SPY, TSLA and USDG. They do not hold ETH, and there is no reason they would.

Every transaction on the chain charges its fee in ETH. So a normal person hits this wall:

I own $500 of tokenized NVDA. I want to sell it. I cannot: I need ETH for the fee. To get ETH I have to swap. To swap, I need ETH.

Their money is visible, sitting right there, locked behind a three cent fee they have no way to pay. Float deletes that moment. You pay the fee in the thing you already own.

It is not a diagram, it already happened

A freshly generated wallet holding zero ETH and nothing but USDG deployed itself and sent USDG on Robinhood Chain mainnet. Before and after, its ETH balance was exactly zero.

transaction

0x566a56fa…9dd2

the account

0xBD55eE38…67D1

ETH it held

0, before and after

fee it paid

0.039109 USDG

it also

deployed itself in the same operation

You can check every line of that yourself on the explorer. We would rather you did.

Life of a transaction

1. Your address exists before your account does

The factory derives your account address from your wallet with CREATE2. The address is real and can receive money while the contract behind it is still nothing at all. Your first operation deploys it, and that same operation does the thing you actually wanted. There is no "fund your wallet first" step.

2. No approval transaction

The account approves the paymaster for the gas tokens at the moment it is created, inside initialize. Most token-gas systems need a separate approval first, which itself costs gas you do not have. That chicken-and-egg is removed by construction.

3. You get a quote before you sign

The bundler estimates the work, the paymaster prices it, and you sign a hard maximum. Float cannot take more than the number you agreed to, because the limit is inside the data you signed.

4. It prepays, then settles up

Validation pulls the full quoted amount up front, because at that moment nobody knows what the operation will really cost. When it is done, postOp bills what was actually burned and sends the rest back in the same token.

quoted 0.139 USDG charged 0.039 USDG refunded 0.100 USDG automatically, same transaction

5. Our bundler carries it

The signed operation goes to float's own ERC-4337 bundler, which wraps it in handleOps on the canonical EntryPoint v0.7 and pays the chain out of float's ETH deposit. No third party sits in the path.

How the price is set

Gas is priced off a 900 second Uniswap V3 TWAP, plus the markup. A time average, not the spot price, which means nobody can shove the pool for a single block to make your fee expensive.

On Arbitrum Nitro the real bill includes an L1 data component for posting your bytes to Ethereum. The quote counts it, so the number you are shown is the number that gets charged.

What protects you

You are never locked in

This is the part most account-abstraction products are quiet about, so it goes in bold.

It is your account. You own it. Float is a convenience sitting on top, not a gate you have to pass through.

The account accepts instructions from the EntryPoint or from you directly. In Solidity terms, every execute call runs through _requireFromEntryPointOrOwner().

So if float pauses, breaks, raises its price, or disappears entirely: send a few cents of ETH to your own wallet and call execute on your account yourself. Everything comes out. You do not need our bundler, our paymaster, or our permission.

What float charges

A markup on top of the TWAP price of the gas, set on chain and visible to anyone. It is 5%, and the contract cannot set it above 20%, that ceiling is a constant in the bytecode, not a policy.

In practice that is fractions of a cent. A token transfer costs roughly four cents of USDG, where the raw chain fee is about three.

Be aware of one honest detail: the amount actually retained runs above the headline markup, because postOp bills a fixed overhead and a slice of the gas limits whether they were used or not. On a measured mainnet transfer the real retained margin was 18.2% of the underlying gas cost, not 5%. We would rather write that here than let you discover it with a calculator.

Addresses

chain

Robinhood Chain, 4663

paymaster

reading…

account factory

reading…

EntryPoint

reading…

gas tokens

USDG, NVDA, AAPL, TSLA and SPY.

Questions