Connecting your Trezor T wallet to a full node

CarmenLeong

Active Member
Mar 2, 2022
47
6
malaysia

How to set up and connect Trezor Suite to a full node running Electrum server​


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For more control over your privacy, the latest Trezor Suite update (version 22.3.2) enables Trezor users to connect to any node running Electrum Server when using the app’s desktop version. Note that you cannot connect to your own node via the Trezor Suite web app. By connecting to your own node, you can prevent data about your hardware wallet use from being leaked to a third-party host. This guide introduces why using your own node matters and how to get set up.

What is a full node?​

A node is software that indexes the entire blockchain, checking for and verifying new transactions. Having a network of decentralized nodes running independently is what keeps the network secure, preventing double spends, and resilient, preventing the network from going offline. Full nodes store and keep track of a lot of data, so lightweight nodes also exist, where the data is heavily pruned to keep computing requirements low.

Running a full node means maintaining a copy of the Bitcoin blockchain, and continuously checking for new transactions and blocks to validate. The key part of this is bitcoind, a ‘headless’ piece of software that can retrieve and send data to the blockchain. It is pretty difficult to work with on its own, so interfaces like Electrum server, Blockbook and Bitcoin core are built on top of the Full node functionality of bitcoind to make it easier and automate some processes.


Why Electrum server?​

There are three options when setting your Trezor Suite backend: connect to the default nodes run by SatoshiLabs; connect to a node running Blockbook; or connect to a node running Electrum Server.

The Electrum server implementation is essentially just a bitcoind client set up in a way that meets the needs of Electrum, an open-source software wallet.
Having software between bitcoind and your wallet is great as it can cache data, tune performance and provide additional information such as fiat conversion rates. By default bitcoind can not give you the full transaction history of an address, so Electrum server acts as a layer on top, with a so-called address index feature to provide such functionality.

Advantages of running your own node​

When you connect to the blockchain without a node of your own, you connect to a server hosted by someone else. If the server were malicious or attacked, it could serve Trezor Suite incorrect data and impact the ability to use Bitcoin.

Connecting to a third-party node can also leak data, such as the addresses and transactions you are querying. The node host can also tell how much Bitcoin you have, among other things. Using Tor you can at least protect your identity so no one knows who you are, but your addresses can be linked together. Connecting to your own node prevents your data from being sent to third-party node operators.

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