APRIL 20
Wallets
The Tool That Helps You Use Bitcoin
The Signal
A Bitcoin wallet does not hold bitcoin. It manages the keys that let you receive and authorise spending.
The Reading
Here is the strange thing about a Bitcoin wallet: there are no bitcoins inside it.Your bitcoin remains recorded on the Bitcoin network. The wallet is the tool that helps you interact with that record.Think of it less like a leather wallet and more like a control panel. It creates receiving addresses, shows transactions and helps prepare payments when you want to spend.
Most importantly, a wallet works with keys.
Yesterday we learned that a private key signs and a public key helps check the proof. A wallet brings those jobs together so you do not have to handle the mathematics yourself.Wallets can look very different.A phone wallet is an app you carry with you. A desktop wallet runs on a computer.A hardware wallet is a separate device designed to keep private-key signing in a more isolated environment. It normally works with wallet software on a phone or computer.There are also custodial services. They may look like wallets, but another company controls the keys. You are trusting that company to protect the bitcoin and allow you to withdraw it.
So the important question is not only, “Which wallet do I use?” It is also, “Who controls the keys?” Different wallets make different choices about convenience, security and control. But the basic job remains the same: help you receive, track and authorise spending.
First Principles
Bitcoin is recorded on the network, not stored inside a wallet.
A wallet manages the keys and information used to receive and spend bitcoin.
Different wallets change where the keys are kept and who controls them.
Today’s Challenge
Pick up your house key. Look at the key, then look at your house. Is your house inside the key?
Of course not.
The key simply gives you the ability to unlock the door. A Bitcoin wallet works in a similar way. The bitcoin is not inside the wallet. The wallet manages the keys that let you control it.
Put the key back in your pocket. The house stayed exactly where it was.
Tomorrow’s Signal
Seed Words