Documentation

Before you start

Wallets

• EVM networks (Ethereum, Base, Arbitrum, Robinhood Chain, HyperEVM, Tempo): MetaMask, or any wallet the Connect button lists.
• Solana: Phantom, or another Solana wallet.
• Bitcoin, for Convert only: Xverse or Phantom.

Pick the network in the navbar; Greatwall asks your wallet to switch to it. Every transaction is prepared by the page and signed by your wallet: check the network, the asset and the amount before you sign.

Test tokens

Greatwall runs on test networks. The Faucet button sends you test versions of real-world-asset tokens (tokenized stocks, funds, gold, stablecoins). They are stand-ins with no value. Greatwall’s server sends them and pays the fee; when your wallet is low on the network’s own coin (test ETH, SOL, HYPE, or PathUSD on Tempo), the same claim adds a little for fees, and Portfolio has a “Get … for fees” button on that coin. Each wallet can claim each token once a day. If Greatwall’s faucet runs dry, it links you to the network’s public faucet.

Networks

Bitcoin is the one real network: the protocol reads real Bitcoin blocks, and Convert pays and receives real BTC. With Bitcoin selected, a page that needs programs offers the same page on another network.

Portfolio

Everything your connected wallets hold, by network and in dollars, plus your index tokens and the assets you have locked. The panel across networks shows each network’s total, and says when a wallet isn’t connected. From here you can send, receive and use the faucet.

Lock and Unlock

Locking keeps an asset in the protocol’s vault on its own network and makes a matching token usable on a paired network. Unlocking burns that token and releases the asset back on its own network.

Locking

• Choose the asset, the amount, the network to receive it on, and the recipient.
• Sign the lock. The asset stays in the vault on this network.
• An operator relays the lock to the other network, where the token becomes usable.

Fast path and slow path

With a fast fee, an attester makes the token usable on the other network as soon as your lock is final on its own network, putting up its own collateral as a guarantee. How long that takes depends on where you lock: about 1–2 minutes from Solana, about 15 minutes from Ethereum (Ethereum takes that long to finalize a block), and longer from a rollup such as Base or Arbitrum. Without one, the lock takes the slow path: a Bitcoin checkpoint the networks certify, then a claim period in which anyone can challenge it, about nine days in all.

Fees

• The network's transaction fee, paid in its own coin.
• An operator's fee, to the operator who relays the lock. Operators may skip one below their minimum.
• An optional fast fee, to the attester who makes it usable at once.

The first lock on a pair

If nothing of an asset has crossed a pair of networks yet, an operator who serves that pair must relay the first lock. Until one does, the asset stays locked, and a lock can’t be cancelled. The page warns you before you sign.

Unlocking

Unlock from the network where you hold the token. Signing burns it; an operator relays the burn, and the asset is released to the recipient on its own network. Each lock and unlock has its own page, which follows it step by step.

Convert

Convert moves value between Bitcoin and a network’s coin, or between two networks, through an operator’s quote. The page shows every fee before you start.

Buying a coin with BTC

• Choose the network and the amount. An operator takes the conversion and locks the coin for you.
• The conversion's page shows the Bitcoin address to pay and the blocks your payment must be in. Pay from the page with your Bitcoin wallet.
• Once your payment is in a Bitcoin block, it is proven to the network and the coin is released to you.

Pay only while the page says you can. If the blocks to pay in have passed, don’t pay: the operator takes the coin back. If the operator doesn’t finish, your payment must be proven before the deadline the page shows.

Selling a coin for BTC, and between networks

You deposit the coin on its network, and the operator pays you on Bitcoin or on the other network. If no operator takes it in time, the page lets you take your deposit and fees back.

Index tokens

An index token is one token backed by fixed amounts of several assets, from one network or several. Anyone can mint it by depositing that mix, and burn it to take the assets back.

Explore

Every index token on the selected network: what backs it, on which networks, what one token is worth now, its supply over time, and its mint and burn activity. Open one to mint or burn it.

Past performance and yield

Each index token’s page shows what its fixed mix of assets would have done over 1, 3, 6 and 12 months:

• Growth:the change in one token’s value, price only.
• Yield (APY): the dividends and interest its assets paid over the past 12 months (an asset listed more recently: since its listing, annualized), weighted by their value today. Bitcoin and gold pay none; stock funds pay dividends; dollar funds pay interest.
• Total return: growth and yield together, with the income reinvested.

They come from the market prices of the assets each part stands for. Past performance is not a promise. When you create an index, its shares set each part’s amount at that day’s prices; the amounts are then fixed, so the shares drift as prices move.

Create

• Pick the parts: assets on this network, or on a network paired with it.
• Set how much of each asset one token holds.
• Set your creator fee, earned on every mint and burn. It is fixed for good once the token is created.
• Give it a name, a symbol, an image and a description. These are published publicly and permanently.

The first mint must be a whole number of tokens: it sets the index’s mix.

Mint and burn

Minting shows what each asset the amount takes, and what your wallet holds; the mint fee is included. Burning pays you each asset back, after the burn fee. As the creator, you collect your fees from the token’s page: one part at a time, or every part at once with Collect all, signed in a single approval on Solana.

Pay with ZEC

Pay with ZEC sells index tokens, on Solana or an EVM network, for shielded ZEC from a Zcash phone wallet such as Zashi or Ywallet. You connect no wallet to pay: pick an index and an amount, give the address it should arrive at on its network, then scan the QR code. On an index’s own page, the ZEC tab buys that index. Your wallet fills in the address, the amount and a memo that names your order; you tap Send.

• The ZEC is real (Zcash mainnet) and the index token is a test token with no value. Orders are capped at $20 each.
• A quote holds its price for 15 minutes. A payment counts after 3 Zcash blocks, about 4 minutes, then the index is minted and sent to your address.
• Nothing is refunded: a payment below the quote gets that share of the order, and one above it gets the order.
• Only shielded payments with the memo are matched: a transparent payment carries no memo.

This part is run by Greatwall, not verified on chain like the protocol’s Bitcoin side. To keep it accountable, Greatwall publishes the lane’s viewing key: with it anyone can list every payment it received and match each to its delivery on Solana. The viewing key cannot spend. Each delivery is public on the index’s network.

Explorer

Live in the navbar opens the Explorer, a live view of iPoW itself: the latest Bitcoin block, and every protocol transaction on every network, who made it (an operator, a user, a guardian) and what it did. Open any row for what it means, why the protocol does it, and its full details. It is read straight from the chains, not from a database of ours, so you can check what the operators do.

How it works

Every cross-network step runs on iPoW, a protocol with Bitcoin as the shared source of truth:

• A Bitcoin light client on each network.Each network checks Bitcoin’s proof of work itself, so it knows Bitcoin’s blocks without trusting anyone.
• Operators. They carry messages between networks, putting up stake that is taken if they lie.
• Attesters. They make a lock usable at once on the fast path, backed by their own collateral.
• Applications. The vault (Lock and Unlock), Conversion (Convert) and BETA baskets (index tokens) are built on top.

The design, the contracts and the specs are in the iPoW repository.

Run a node

The people who keep iPoW running are paid for it, and anyone can join. One program, the iPoW node, runs any mix of three roles on any of the networks. Each role puts up stake that it loses if it lies, which is what lets everyone else trust the result without trusting the person.

The more independent guardians watch, the safer everyone is: one honest guardian is enough to catch a lie. Today the deployer runs the only operator, and the protocol is open for anyone to join.

Getting started

• Read the node guide: each role’s duties every round, its settings, and how to run it.
• Start as a guardian: it needs no stake, only a little coin for deposits and gas.
• An operator also locks a stake on each network, registers once on each pair of networks it serves (one Bitcoin transaction, counted after a 36-hour challenge window), and keeps bonds in the tokens it carries.

Status and safety

• Greatwall runs on test networks only, and its tokens have no value. Bitcoin is real: only pay BTC amounts you can afford to lose.
• iPoW is built so no one is in control. Its contracts on the EVM networks have no owner and can't be changed by anyone, Bitcoin is checked on chain rather than reported, and anyone can run an operator or a guardian.
• It is in active development and not yet audited. While it is tested, a few development keys exist on purpose: on Solana devnet the programs can still be upgraded for fixes, and new vaults have a genesis key until October 21. Once audited, before mainnet, the Solana programs become unchangeable, like the EVM contracts. The iPoW repository’s SECURITY.md lists each key, what it can do and when it ends.
• Transactions are final once confirmed. Greatwall never holds your assets or keys, and can't reverse a transaction.

See the Terms of Use, the Privacy Policy and the Cookies Policy.

Help

Questions, or something not working? Write to us, or find us on X and Telegram (links below).

Email

support@greatwall.finance

Website

greatwall.finance