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

Does the user not need to specify the amount in the transaction creation process as the amount is implicitly determined by the UTXOs they select?

I'm trying to understand the Bitcoin transaction creation process and how inputs and outputs work. From what I know, when a user creates a Bitcoin transaction, they typically select UTXOs (Unspent Transaction Outputs) as inputs to the transaction.

Given this, it seems that the amount of the transaction is implicitly determined by the UTXOs selected, since the sum of the inputs is what gets spent. In other words, the total amount of Bitcoin being sent would be based on the value of the UTXOs used in the inputs, while the user doesn't need to explicitly specify the amount.

Is that correct? Does the user really need to specify the amount at all, or is it entirely determined by the selected UTXOs? And if there's any difference, what is the role of specifying the amount in some wallet interfaces?



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