How Retain works

Tokenized equities, ETFs and other real-world assets trade on Robinhood Chain against ETH and USDG. Those markets need liquidity to function, and whoever supplies it is paid a share of the fee on every trade that routes through their pool. Retain is an interface for doing exactly that, and nothing else.

It is not a lender and not a strategy. Your assets are not borrowed against, rehypothecated or routed anywhere you cannot see. You choose a pool, you fund it, and the resulting position is minted to your own wallet.

Retain builds transactions and reads state. It never holds your assets and cannot move them.

Robinhood Chain

Chain 4663, an Arbitrum Orbit L2. Gas is paid in ETH. Retain supports this network only — a deposit signed on any other chain would be meaningless, so the interface asks you to switch rather than letting you try.

Quote currencies

Every pool pairs its asset against either native ETH or USDG, a dollar stablecoin. Which one a pool uses determines what you supply alongside the asset.

Explorer

robinhoodchain.blockscout.com. Every transaction Retain builds is linked to it once confirmed.

There is no curated list. Retain derives the pool set on-chain: for every token in its catalogue, against each quote currency, at each fee tier the protocol allows, it computes the pool id and asks the chain whether that pool holds liquidity. Whatever answers is what you see.

Only pools without hooks are listed. A hook is arbitrary code the pool runs on every swap and deposit, and a pool with one cannot be audited from the outside — so those are excluded rather than shown with a warning.

Where an asset trades at several fee tiers, the list shows the deepest one, because that is the tier where trades actually route and therefore where fees are actually earned.

A pool holds two assets, so a deposit has to supply both. There are two ways to do it, and the review screen names every step before you sign anything.

Supply both sides

You already hold the asset and the quote currency. Retain computes the ratio the pool requires at its current price and mints against both.

Supply one and let Retain route

You hold only ETH. Retain quotes the swaps needed to reach the right ratio, executes them through the router, then mints. Every swap leg is listed with its amount before you approve it.

Positions are opened across the full price range. That means your liquidity stays active at every price rather than only inside a band you picked, and it is why a position does not fall out of range and stop earning.

Slippage applies as a ceiling on what the mint may spend. If the price moves past your tolerance between quoting and signing, the transaction reverts rather than filling at a worse ratio.

Liquidity is minted as an ERC-721 token owned by your address on the v4 position manager. It is not a balance in Retain’s database or a claim on Retain — it is an asset in your wallet, and it stays yours whether or not this interface is running.

Retain lists the positions it opened, because it records their token ids as it mints them. The position manager cannot be enumerated by owner, so a position you created somewhere else is still yours on-chain but will not appear in your portfolio here.

Each pool charges a fixed fee on every trade — the rate is shown on the pool, and on this chain it ranges from a basis point to several percent. That fee is paid by the trader and accrues to the pool’s liquidity providers in proportion to their share of it.

So your earnings depend on real trading volume through your specific pool. If nothing trades, nothing accrues. A deep pool with no flow pays less than a shallow one with constant flow.

Retain charges no fee of its own. It takes no cut of your deposit, your position or the fees it earns.

Collect

Settles the fees your position has accrued to your wallet and leaves the position open. Mechanically this is a zero-amount decrease, which is how v4 pays out fees.

Withdraw

Takes 25, 50, 75 or 100 percent of the position. There is no lock-up, no queue and no notice period. A full withdrawal burns the NFT and collects the accrued fees on the way out.

Both are transactions you sign against the position manager. Neither depends on Retain being online: the contracts are public, and your position can be exited without this interface.

This deployment runs no indexer, and several numbers you might expect cannot be produced honestly without one. They are absent rather than estimated.

No fee APR

An annualised return needs fee income over a period, which needs trade history. Deriving one from a pool’s fee tier alone is not an estimate, it is a fabrication — so no APR appears anywhere in this interface.

No uncollected fee balance

The position manager exposes no running total of what a position has earned. A “fees earned: 0.00” row would be a guess formatted as precision. Collecting is what reveals the amount.

No 24-hour volume

Same reason: it requires indexed trade history.

Depth is not total value locked

The liquidity figure shown is the value of both sides of a pool at its current price. Liquidity parked in price ranges away from that price is not counted, so this number is smaller than a TVL figure and measures something more useful — what is actually available to trade against now.

You hold both assets

A position holds the asset and its quote currency together. As the price moves the pool rebalances between them, so you end up holding more of whichever is falling. That exposure — commonly called impermanent loss — is real, and fee income does not automatically offset it.

Smart contract risk

Your funds sit in Uniswap v4 contracts on Robinhood Chain. Retain does not custody them, which also means Retain cannot recover them.

The asset is a token, not the security

A tokenized equity tracks a listed security and trades in its own market. The two can diverge until someone arbitrages them.

Providing liquidity involves price exposure, potential impermanent loss and smart-contract risk. Fee income does not guarantee an overall profit.

The addresses Retain builds transactions against. Every one is public and verifiable on the explorer.

Pool manager0x8366a39C…43e40951

The v4 singleton. Every pool's state lives inside it.

Position manager0x58daec31…E8a04fA7

Mints and burns the ERC-721 that represents your position.

State view0xf3334192…bd9e673b

Read-only accessor for pool price and liquidity.

Quoter0x8dc178ef…67c98f94

Prices the swap legs when you fund a pool from one asset.

Universal router0x53BF6B06…bC5A6F77

Executes those swaps.

Permit20x00000000…3aC78BA3

Holds the token approvals the position manager spends against.