The idea in one line

Your wallets are the same address on every EVM chain. Centurion reads every payment leaving them, wherever it happens, and credits the spare change to one pot on Robinhood Chain. That pot buys your stocks. You never bridge anything, and you never choose a chain.

Where it works

• 

  Robinhood Chain

  the pot lives here

  Stock Tokens, and the pot itself

  Pays a round-up in USDG or ETH

• 

  Ethereum

  Uniswap, Aave, OpenSea

  Pays a round-up in USDC or USDG · ETH not yet, no USD feed

• 

  Base

  Aerodrome, Zora, Farcaster mints

  Pays a round-up in USDC or ETH

• 

  Arbitrum

  Hyperliquid deposits, GMX

  Pays a round-up in USDC or ETH

• 

  HyperEVM

  Hyperliquid's own EVM

  Pays a round-up in USDC · HYPE not yet, no USD feed

• 

  Polygon

  Polymarket

  Pays a round-up in USDC or POL

• 

  BNB Chain

  PancakeSwap, Four.meme

  Pays a round-up in USDC or BNB

• 

  Avalanche

  Trader Joe, Pharaoh

  Pays a round-up in USDC or AVAX

• 

  Monad

  Kuru, Magma

  Pays a round-up in USDC · MON not yet, no USD feed

• 

  Arc

  Circle's chain, USDC gas

  Pays a round-up in USDC

What rounds up here

Anything that moves value out of one of your wallets and can be priced in dollars. The venues below are examples, not integrations: Centurion has no arrangement with any of them and needs none, because it reads the wallet, not the app.

• Trade on GMGN on BaseWhat leaves your wallet: ETH, or the token you sold$9.15 +$0.85
• Trade on Terminal on EthereumWhat leaves your wallet: ETH, or the token you sold$33.70 +$0.30
• Trade on Axiom on Robinhood ChainWhat leaves your wallet: ETH, the hub's base asset$61.45 +$0.55
• Swap on Uniswap on EthereumWhat leaves your wallet: the token you paid with$1,337.12 +$0.88
• Send USDC to a friend on PolygonWhat leaves your wallet: USDC$24.10 +$0.90
• Swap on PancakeSwap on BNB ChainWhat leaves your wallet: the token you paid with$42.35 +$0.65
• Deposit to Hyperliquid on ArbitrumWhat leaves your wallet: USDC, to the bridge$212.40 +$0.60
• Buy a memecoin with BNB on BNB ChainWhat leaves your wallet: BNB$150.50 +$0.50
• Top up your account on Polymarket on PolygonWhat leaves your wallet: USDC$18.25 +$0.75
• Open a position on GMX on ArbitrumWhat leaves your wallet: the collateral you posted$75.30 +$0.70

The distinction that matters is whose address the money leaves. A Hyperliquid deposit is USDC leaving your own wallet on Arbitrum or HyperEVM for the bridge, so it rounds up; the perp fills themselves happen inside Hyperliquid and are not on-chain payments. Polymarket is the same shape the other way round: funding your account is USDC leaving your wallet, but the bets are signed from Polymarket's own per-user proxy, so they are not payments from an address you enrolled. Nor is anything we cannot price — an unlisted token you paid with is skipped unless the same transaction also moved something we can value.

How spare change from another chain reaches the pot

1. 1

   A payment leaves your wallet on, say, Base.

   A few blocks later, once the chain is safe to read, Centurion prices it and works out the round-up.

2. 2

   The round-up is paid from that same wallet, on that same chain.

   USDC if the wallet holds some, otherwise the chain's own coin converted at the Chainlink price, never more than 1% worse. Nothing to approve, nothing to park.

3. 3

   It is credited to your pot on Robinhood Chain at once.

   Centurion's treasury fronts the credit from its own float and brings the money home later over Across or CCTP. You never wait for a bridge and never pay for one.

4. 4

   At your threshold, the pot buys your stocks.

   One purchase, all your picks, on Robinhood Chain. The Stock Tokens land in your wallet.

What is the same on every chain

• Gas is on us. Every round-up and every purchase, on every chain.
• Gas is never rounded up, and neither are payments to Centurion's own contracts.
• One switch in Setup turns round-ups off everywhere at once.
• A payment that cannot be priced is skipped, never guessed.
• Round-ups on 9 spokes and the hub are read from the same wallets; you never enroll a chain.

Next

Solana is being built, and more chains follow. See the roadmap.