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

How light can an input be?

In the bitcoin-core reference client, CFeeRate::GetFee is a function of num_bytes. What is the smallest amount of num_bytes that a TxIn can be in practice as it pertains to calculating that inputs effective value? The reason I ask is that there are some test cases in the core wallet that use 150 bytes which seems unrealistic. The transaction calculator shows taproot as the most compact at 57.5 vB or 230 bytes I believe. The reason why 150 bytes is problematic is that it's difficult to faithfully reproduce that calculation using the rust-bitcoin framework for example, since the effective_value calculation implies at least inputs of 160 bytes due to the output and sequence size implicit in all effective_value calculations. Of course, a test could be made for 160 bytes instead which would probably have identical results, although I'm mostly curious why 150 bytes was selected here and if there's some practical oversight in the rust-bitcoin effective-value calculation.



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