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Crypto 101

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From zero to your first onchain action. This guide uses Sepolia testnet—no real money involved at any step. The same setup opens the Lottery and Raffle demos.

1. Install a wallet

A browser wallet holds your keys and signs transactions. Install MetaMask from the official site or search for it in your browser's extension store — only install from the store directly, never from a third-party download link. Alternatives that work just as well: Rabby (better phishing protection), Coinbase Wallet, or the built-in Brave Wallet.

During setup you'll be shown a 12-word recovery phrase. Write it on paper and store it somewhere physically safe. Anyone with those words controls the wallet — no legitimate site or support team will ever ask you for it.

2. Switch to Sepolia testnet

Click the network selector at the top of MetaMask and choose Sepolia. If it's not listed, go to Settings → Advanced and enable Show test networks. Sepolia is a free public testnet — ETH here has no market value.

3. Get test ETH

Faucets send free Sepolia ETH on request. The demo amounts are deliberately tiny, so one normal faucet claim is plenty.

faucetrequires
Google Cloud Web3 FaucetGoogle account
Alchemy Sepolia FaucetFree Alchemy account
pk910 PoW FaucetNo account — browser mining
NateRich.net faucetNo account — self-hosted browser proof of work

Paste your public wallet address (starts with 0x) into the chosen faucet. If one is rate-limiting you, try another.

4. Connect and play

You're set. Open any live demo and click Connect wallet — MetaMask only shares your public address, it never grants the site access to your funds. The same Sepolia test ETH covers all of them:

Quintile Lottery — buy a ticket and watch a round resolve on-chain, with roughly a one-in-five win rate. New to it? Start with the no-wallet simulator to learn the math first.

Raffle — sponsor-funded prize pots with open, token-gated, or allowlist entry.

Testnet Demos — the Lottery and Raffle are the two maintained play-money experiments.

Research · Testnet Demos · Going further — Crypto 102 →