Topics by category

A Bitcoin Core feature that lets a new node start from a hashed UTXO snapshot instead of rebuilding the set from genesis.

The peer-to-peer protocol light clients use to fetch compact block filters from full nodes, so they can scan the chain without leaking addresses to the server.

The compact block filter format for Bitcoin. A small Golomb-coded set built per block that light clients can test locally to find relevant transactions.

An encrypted, authenticated transport for the Bitcoin peer-to-peer protocol, replacing the older plaintext format.

A portable JSON Lines format for wallet labels on Bitcoin: the private notes attached to transactions, addresses, public keys, and UTXOs.

A Bitcoin smart contract whose settlement depends on a signed statement from an oracle, without the oracle seeing the contract or holding any funds.

A bandwidth-efficient transaction relay protocol for Bitcoin that replaces flooding with set reconciliation between peers.

A structured language for Bitcoin scripts that is easy to analyze, compose, and sign with a generic wallet.

A proposed Bitcoin opcode that lets a transaction commit in advance to how its coins will be spent.

A standard file format for a Bitcoin transaction that is still being constructed or signed, used by nearly every modern wallet and coordinator.

A way to receive Bitcoin to a reusable static address without reusing on-chain addresses.

The 2021 Bitcoin soft fork that introduced Schnorr signatures, a new output type, and a new script system, all under a single on-chain footprint.

Bitcoin's accounting model: a wallet's balance is the sum of every output addressed to it that has not yet been spent.

A Lightning feature where the receiver supplies a partial route with hop identities encrypted, so the sender never learns who the destination is.

A Lightning specification for reusable payment offers that replace one-shot invoices.

The Lightning Network's peer-to-peer protocol for announcing channels and routing policies, so every node can build a view of the public graph.

A Rust library for embedding a Lightning node inside a wallet or other application.

Resizing a Lightning channel without closing it by adding or removing funds in a single on-chain transaction.

A collaborative Bitcoin transaction that combines inputs from multiple participants to break the common input ownership heuristic used by chain analysis.

A hardened, privacy-focused Android distribution for Pixel phones.

A cooperative Bitcoin transaction where the receiver also contributes an input, breaking the common-input heuristic, for increased on-chain privacy.

An anonymity network that routes traffic through three-hop circuits to hide the link between sender and destination.

A Chaumian ecash protocol for Bitcoin, where a mint issues blinded tokens backed by sats on Lightning.

Digital bearer tokens issued by a mint using blind signatures, so that spending and redeeming cannot be linked to the original withdrawal.

A federated Chaumian ecash system where a group of guardians jointly custody the underlying Bitcoin.

A next-generation Bitcoin mining protocol that lets individual miners build their own block templates.

A Nostr spec that maps human-readable identifiers like `name@domain.com` to public keys via a JSON file hosted on the domain.

A Nostr spec for relay-based groups. The hosting relay owns the membership list, the moderation log, and the stream of group messages.

A Nostr spec for labels: signed events that attach a tag to another event, a pubkey, a relay, or a topic, for client-side moderation and filtering.

Nostr's current versioned encryption scheme for direct messages and other private payloads, using ChaCha20 with HMAC-SHA256 and padded ciphertext.

Nostr Implementation Possibilities: the numbered specifications that define how clients and relays behave.

An open protocol for decentralized social networks based on signed events and a set of interchangeable relays.

A Nostr protocol that lets a client pay and receive Lightning payments through a user-controlled wallet, using relays as the transport.

The current standard for private direct messages on Nostr, using gift wrap to hide sender, receiver, and metadata from relays.

The small servers that store and forward signed events on Nostr.

A Nostr protocol for signing events with a key that lives on a different device or service than the client composing the event.

Public Lightning payments attached to a Nostr event, recorded on relays as signed receipts that clients render under the original note.

A second-layer Bitcoin protocol that uses a shared UTXO and a coordinator to let users transact off-chain without opening channels.