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Blockchain & Cloud Computing · Module 8 of 10

Wallets, tokens and Web3

Interact with blockchains safely.

📖 Key ideas

  1. Wallets manage private keys; the seed phrase is the master backup.
  2. Never share private keys or seed phrases.
  3. Tokens: fungible (ERC-20) and non-fungible (ERC-721).
  4. Web3 apps connect via wallets like MetaMask.
  5. Beware of scams; crypto is volatile and regulated differently by country.
💡 Real-life example: A wallet's seed phrase is the master key to your locker: whoever has it owns everything inside.
WalletManages blockchain keys
Seed phraseWords that restore a wallet
ERC-20Fungible token standard
MetaMaskPopular browser wallet