This guide walks you through installing the MetaMask browser extension, creating and securing your wallet, adding the right blockchain network, and connecting to the Brickken platform at dapp.brickken.com. It applies to both issuers (setting up the corporate wallet) and investors (connecting to participate in an offering).

MetaMask is a self-custody crypto wallet that runs as a browser extension (and a mobile app). It holds the keys to your blockchain address, signs transactions on your behalf, and acts as the bridge between your browser and any Web3 application, including dapp.brickken.com.

In the Brickken flow you will use MetaMask to:

1. Hold the wallet that owns your tokenized asset (issuers) or the wallet that buys it (investors).
2. Pay the network gas fee when minting, transferring, or claiming tokens.
3. Sign every on-chain action: KYC binding, token purchase, dividend claim, secondary transfer.

MetaMask never holds your funds on its own servers. If you lose your Secret Recovery Phrase, no one (not MetaMask, not Brickken) can recover it.

1. Open a supported browser: Chrome, Firefox, Brave, Edge, or Opera.
2. Go to metamask.io/download.
3. Click Install MetaMask for Chrome (the page detects your browser and adjusts the label).
4. You will be redirected to the Chrome Web Store (or your browser's equivalent). Click Add to Chrome, then confirm Add extension in the popup.
5. After installation, MetaMask opens automatically in a new tab. Pin the extension to your toolbar: click the jigsaw icon at the top right of the browser, find MetaMask, and click the pin icon. You'll want it one click away.

On first launch MetaMask asks how you want to secure the wallet:

• Secret Recovery Phrase (SRP): the traditional self-custody option. You get a 12-word phrase that you store offline. This is what we recommend for any Brickken corporate or investor wallet.

• Social login (Google or Apple, extension only): faster setup, but ties wallet recovery to a social account. Not recommended for issuer wallets that will hold company assets.

For the SRP flow:

1. Click Create a new wallet.
2. Accept or decline analytics (your choice, it doesn't affect the wallet).
3. Set a strong password. This password unlocks MetaMask on this specific browser; it is not a recovery mechanism.
4. Watch the short Secret Recovery Phrase tutorial.
5. Click Reveal Secret Recovery Phrase and write down the 12 words in order, on paper. Do not screenshot, do not paste into a notes app, do not store in a password manager that syncs to the cloud.
6. Confirm the phrase by re-entering the requested words.
7. Done. You'll see your new account in MetaMask, with a 0x... address at the top.

The SRP is the master key. Anyone who has it controls the wallet. MetaMask's published guidance:

• Store it physically, offline, in a place only you can access. Multiple copies in separate physical locations is even better.

• Never share it with anyone, including the MetaMask team, including Brickken. We will never ask for it.

• Never type it into any website other than MetaMask itself, and only when restoring a wallet.

• For wallets that will hold meaningful value (any issuer corporate wallet, any investor with a sizeable allocation), use a hardware wallet (Ledger or Trezor) and connect it to MetaMask. Hardware wallets keep the private keys offline, so an online scammer cannot drain the wallet even if they trick you.

• Keep your browser, operating system, and MetaMask version up to date. Updates often include security patches.

MetaMask ships with Ethereum Mainnet enabled. The Brickken platform also operates on other EVM chains (most commonly BNB Chain, Polygon, Arbitrum, Base). Confirm with your Brickken contact which chain your offering uses, then add it.

To add a network already in MetaMask's list:

1. Click the network selector at the top left of MetaMask (it usually says Ethereum Mainnet on a fresh wallet).
2. Click Add a network.
3. Scroll the Additional networks section, find the chain (for example BNB Smart Chain or Polygon), and click Add.
4. Approve the prompt.

To add a custom network (less common, only if Brickken provides specific RPC details):

1. Click the network selector, then Add a network, then Add a network manually.
2. Fill in: Network name, New RPC URL, Chain ID, Currency symbol, Block explorer URL. Use only values provided by Brickken or verified at chainlist.org.
3. Click Save, then switch to the new network.

Every on-chain action costs a small fee (gas), paid in the network's native token: ETH on Ethereum, BNB on BNB Chain, MATIC on Polygon, and so on.

For most Brickken operations, 15 to 30 USD worth of the native token is enough to cover the full setup. You can top up later.

Three ways to fund:

1. Buy in MetaMask: open the wallet, click Buy, pick the token, follow the on-ramp (card, bank, Apple Pay depending on region).
2. Send from a centralized exchange (CEX): copy your MetaMask address (click the address at the top of the wallet), then withdraw from Binance, Coinbase, Kraken, etc. Double-check the network when withdrawing. Sending BNB on Ethereum to a BNB Chain address (or vice versa) can lose the funds.
3. Receive from another wallet: same idea, copy your address and have the sender push the native token.

1. Go to dapp.brickken.com in the same browser where MetaMask is installed.
2. Click Connect wallet (or Sign in with MetaMask, depending on the page).
3. MetaMask pops up and asks which account(s) to connect, and which permissions to grant.
4. Pick the account, click Next, then Connect.
5. The platform asks you to sign a one-time message to verify ownership of the address. This is a free signature, not a transaction, no gas is consumed.
6. You're in. The platform now sees your address and can request transactions, but cannot move funds on its own.

When the Brickken platform requests an on-chain action (mint, transfer, claim), MetaMask opens with a transaction details screen:

1. Review what you are signing: the action label, the contract address, the amount, the network, and the estimated gas fee.
2. If anything looks wrong (unfamiliar contract, unexpected amount, wrong network), click Reject.
3. If everything looks right, click Confirm. MetaMask broadcasts the transaction.
4. You'll see a pending notification, then a confirmation once the chain processes the block. The block explorer link (Etherscan, BscScan, Polygonscan, etc.) lets you verify the result.

A signature request (no gas, just proves you control the address) looks different: there is no gas estimate, and the action is labeled Signature request. These are safe in normal use, but still read the message before signing.

• MetaMask was installed from the official source (metamask.io/download or the browser store).
• Secret Recovery Phrase is written on paper, stored offline, never typed into a website.
• Browser, OS, and MetaMask are all up to date.
• The network shown in MetaMask matches the network Brickken specified for this offering.
• The contract address in the transaction prompt matches the one Brickken communicated.
• For high-value wallets, a hardware wallet (Ledger or Trezor) is connected.

• Install MetaMask

• Create a new wallet

• Secure your Secret Recovery Phrase

• How to add a custom network

• Change networks

• Connect to a dapp

• Basic security tips

If anything in this guide is unclear or your specific offering needs different steps (custom RPC, multisig, hardware wallet pairing), reply on the Brickken thread or message me directly. Happy to jump on a quick call and walk through it live.