Tangem Wallet Pack of 2 - Secure Crypto Wallet - Trusted Cold Storage for Bitcoin, Ethereum, NFT's &

Tangem Wallet Pack of 2 - Secure Crypto Wallet - Trusted Cold Storage for Bitcoin, Ethereum, NFT's &
Key item features Ultimate Security: Generates a private key that remains on the card, safeguarding crypto and NFTs from hackers with EAL6+ certification and audited firmware. Versatile Compatibility: Manages over 13,000 tokens across 70+ blockchains, supporting DeFi, NFTs, and DeEx without wires, Bluetooth, or USB. Effortless Operation: Utilizes NFC for secure transactions via a mobile device and the Tangem app, enabling buying and selling crypto with various payment methods. Smart Backup: Features a second Tangem Wallet as a backup, eliminating the need for paper, pictures, or seed phrases for recovery. Durable Design: Boasts IP68 protection against environmental conditions, ensuring longevity and robust physical security. Comprehensive Support: Compatible with Bitcoin, Ethereum, Solana, XRP, USDT, and over 6,000 cryptocurrencies, integrating with dApps and WalletConnect.

LBANK

LBANK

Are blockchain stateless and UTXO stateful?

As far as I understand, when a new node joined the network, it will download 500+ GB blockchain data that will be used to verify the blockchain integrity.

Start from checking header from genesis block to tip block in order to check the integrity whether the downloaded blockchain is corrupted or not, since blockchain is hard to rewrite but easy to verify.

Then, it's iterating the body of block from genesis block to tip block which take days or weeks to construct UTXO (the current balance of each address).

For every block during iteration:

  • Add an address to UTXO set if it's being an output (destination) in a transaction.
  • Remove the address from UTXO set if it 's being an input (source) in a transaction.

So, can I say the blockchain itself is stateless since it's only allowing append operation to generate new block thus it's only storing transaction history.

From that stateless data, every node can construct UTXO sets which is stateful where every nodes keep the state in its internal memory (same like how mempool stored). Correct?

If correct, that's mean UTXO of every nodes might be vary.

Please clarify my understanding.



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