== Public and Private Keys and Extensions

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=== Public and Private Keys: The Foundation of Nostr
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In the world of [[Nostr]], we diverge from the traditional username and password model, embracing instead the concept of [[public keys]] and [[private keys]]. Public keys, often referred to as [[npubs]] in the Nostr ecosystem, serve as your unique identifier. One of the fascinating aspects of npubs is their flexibility - you can input them into various Nostr applications without necessarily needing the entire string.

To enhance user experience and functionality, Nostr developers have introduced [[extensions]]. These extensions act as bridges, allowing different Nostr applications to work seamlessly with one another while maintaining the security of your private key. Some popular extensions include [[NIP-07]], which I personally use, along with other options like [[Alby]] and [[Nos2x]].

It's worth noting that the Nostr community is brimming with talented developers who are constantly innovating. While I may not be able to list every developer or application, I'm consistently impressed by the excellent work being done in this space. Remember, Nostr isn't the product of a single individual or company - it's a collaborative effort involving hundreds of brilliant minds.

==== The Power of Zaps: Nostr's Unique Feature
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One of Nostr's most distinctive features is the concept of [[zaps]]. Essentially, zaps are small [[Bitcoin]] payments facilitated through the [[Lightning Network]]. This integration of a global payment system directly into the protocol is truly remarkable.

Zaps offer a myriad of possibilities:

* You can easily pay for goods or services within the Nostr ecosystem.
* Content creators, artists, and bloggers can receive direct donations from their audience.
* Transactions occur peer-to-peer, eliminating the need for intermediaries.

The beauty of zaps lies in their simplicity and speed. Multiple wallets can be used to transfer amounts quickly and efficiently. As we explore various Nostr applications, you'll see how zaps are implemented and the exciting possibilities they bring to the table.

Some popular Lightning wallets that integrate well with Nostr include:

* [[Zeus]]
* [[Alby Wallet]]
* [[Moon Wallet]]
* [[Strike]]

These wallets allow you to manage your sats (the smallest unit of Bitcoin) easily. You can manually input the amount of sats you want to send, and most applications will generate a QR code for easy scanning and quick transfers.

In essence, Nostr's integration of the Lightning Network creates a seamless, global payment system built right into the protocol. It's a testament to the innovative spirit of the Nostr community and a glimpse into the future of decentralized communication and transactions.