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

What does nVersion represent in Bitcoin transaction?

Have a few questions about the nVersion field in the transaction serialization format and they are related to the purpose of this field.

  1. What does this field tell us? In the sense that if it is version 1, the transaction fields are like this, if it is version 2, the transaction fields are like that, and so on. I don't see this field being intended for this. I only know that the transaction version affect nSequence. If the version is 1, the nSequence value has no purpose (it was intended as a replacement field, but is now disabled and you can put whatever you want in version 1) and if version is 2 then nSequence is used for relative time lock. What are the other purposes of this field, if any?

  2. What are all the standard and consensus rules for this field? Can it have any value under the consensus rules, but only 1 and 2 under the standard rules?

  3. If there is consensus and standard rules for this field, how are changes made to this field? For example, if the consensus and standard rule for this field was that it must be 1, then how was the addition of a relative timelock context to nSequences in the presence of version 2 done? That is, how was it possible that the value of this field can now be also 2 in order to add this change? How will version 3, 4, 5 or 10 be enabled? Hard fork?



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