4

No. The hardware wallet company sometimes runs a node, but you could just as easily use a client like Electrum instead, and use Electrum nodes instead with your hardware wallet. All the node is used for is checking for transactions and publishing transactions. The wallet software will use the xpub from the hardware wallet to check for payments people have ...


2

Do I understand it right that every hardware wallet company like Ledger, Trezor or Shiftcrypto run a full node (e.g. bitcoind) in their company network and every hardware wallet, which is connected via the locally installed company's software at the sender's computer just sends a request to this full node like this? No. At the basic level, a hardware wallet ...


1

Hardware wallets such as the Trezor ones you mentioned are only a secure method of storing and using your private keys. When you want to send BTC, that transaction will be signed mathematically completely within the confines of the key itself. One could design a hardware wallet with a full user interface, negating the need for a separate computer all ...


1

The way I understand it, the important part is that for BIP-143 each signature is only calculated for the amount that it's own input spends. For the other inputs only their outpoints (txid+txidx) are used for the signature digest. Let's assume you have two UTXOs, one with 15 BTC at outpoint txid0:txidx0 and another with 20 BTC at outpoint txid1:txidx1. ...


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