Mechanics
Any chain
How buyers on other chains buy Hardfloor coins in phase 1, and how coins can be held and sold on other chains in phase 3.
Phase 1: buying from other chains
You do not need funds on Robinhood Chain to buy a Hardfloor coin. Pay with ETH on Ethereum, Base or Arbitrum, and a single order does the rest:
- You choose how much ETH to spend on the coin. Relay quotes what that costs on the chain you pay from, its fee included.
- You send one deposit to Relay on that chain.
- A Relay solver delivers the ETH on Robinhood Chain and, in the same transaction, calls the Hardfloor buyer contract with it.
- The buyer checks that the Hardfloor factory lists the coin and buys with a minimum number of coins and a 30 minute deadline.
- The coins land at your same address on Robinhood Chain, with any unspent ETH.
An independent solver fills the order on Robinhood Chain from its own funds, so no Hardfloor market maker ever holds your money. Relay adds its own fee: in a quote on 15 September 2026, delivering 0.01 ETH and running the buy cost about 1.1% of it, most of that gas on Robinhood Chain. Bridges also add their own risks (see Risks).
Routes by chain
| Paying from | Route |
|---|---|
| Ethereum, Base, Arbitrum (ETH) | Relay |
| USDC and other chains Relay supports | Not in the app yet |
| Across | The buyer contract accepts Across fills, but the app does not offer this route yet |
| Solana | Not supported yet |
In phase 1, other chains are only a way to pay. The coins themselves stay on Robinhood Chain, next to their pool and their floor.
If the buy cannot happen
- Before you pay. Relay checks the buy on Robinhood Chain when it quotes, and gives no quote for an order that would fail.
- On Robinhood Chain. If the price moved past your minimum, the order passed its deadline, the coin is not listed or the market refuses the buy (for example at the beta cap), the buyer contract sends all the ETH to your address on Robinhood Chain. It does not fill at a worse price, and your money does not wait inside a bridge.
- If Relay never fills. Relay refunds your deposit on the chain you paid from, minus the gas of the refund.
A wallet that is a contract and refuses ETH gets the same amount as WETH.
Phase 3: holding and selling on other chains
In phase 3, coins become omnichain through LayerZero. An OFT adapter on Robinhood Chain (LayerZero endpoint ID 30416) locks coins, and the same coin is minted on another chain the first time someone bridges it there.
Selling into the floor from another chain is one bridge call. The coins travel to Robinhood Chain and sell into the floor on arrival.
One floor behind every copy
Coins locked in the adapter still count as circulating supply. That means the reserve on Robinhood Chain backs every copy of the coin, on every chain.
It also keeps prices on other chains in line. If a coin trades under its floor on another chain, anyone can buy it there, bridge it and sell into the floor. That is what keeps other chains from trading under the floor for long.
Not a peg