Block brings Lightning payments to x402
Block has added Bitcoin Lightning to the x402 payment standard. The design lets software pay for individual requests, with important limits on delivery and refunds.
Understand Bitcoin. Put it into practice.
Bitcoin education, practical guides and sourced news. Explore wallets, self-custody, Lightning and the people building the ecosystem.
The library
Browse everythingExplainers
20What a thing is, assuming nothing. Start here if the words are new.
- What is a PSBT?
- A Bitcoin signed message proves less than it sounds
- A Bitcoin wallet needs more than its keys
- What is a coinbase transaction?
Guides
14Sit down and do one thing, with a way to check it worked.
- Build and verify a Bitcoin Merkle proof with Python
- How to verify and install Sparrow Wallet
- Verify a Bitcoin block header with Python
- How to check a Bitcoin transaction without a wallet login
Deep Dives
9The mechanism underneath, with the spec and the constants.
- The 2018 hash war, and what hashrate cannot decide
- Bitcoin has no balances, only unspent outputs
- How Bitcoin holds a ten-minute block interval
- The Lightning implementations, and how they differ
Features
13An argument, with the strongest version of the other side.
- The block size war, and what it settled
- Nobody is in charge of Bitcoin, which is the hard part
- Why You Should Accept Bitcoin at Your Beachfront Business
- Texas passes a Bitcoin reserve law: what changes