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getblocktemplate - Fundamentals

BIP 22. Luke Dashjr.

BIP 22, getblocktemplate - Fundamentals. A new JSON-RPC method for "smart" Bitcoin miners and proxies.

Status in the source: Deployed. A reading of the public specification, not a copy of it and not a certification.

getblocktemplate - Fundamentals is worth reading for the rule it actually adds: A new JSON-RPC method for "smart" Bitcoin miners and proxies.

The five-minute read

The rule

A new JSON-RPC method for "smart" Bitcoin miners and proxies.

What was already failing

An interface that is only a name in a repository will be re-implemented differently by every team, which is how shared contracts break.

What the number does not mean

The source marks this deployed. That is a statement about the text, not a promise that every wallet or node has shipped it.

What a builder should be able to point at

An implementation either constrains JSON, RPC or it is a different design.

One action, walked through

  1. Open BIP 22 and read the status line before the examples.
  2. Write down the rule in one sentence. A fair version of that sentence is: A new JSON-RPC method for "smart" Bitcoin miners and proxies.
  3. Name the object that changes: JSON, RPC.
  4. Ask what an old client, an old contract, or an offline counterparty does. If the document is silent, the silence is part of the design.

The argument, unpacked

What the text is allowed to settle

Bitcoin Improvement Proposal 22 can settle the shape of getblocktemplate - Fundamentals. It cannot settle whether a later client, a later fork, or a later wallet still does this.

What this page will not pretend

There is no benchmark, no adoption number, and no claim that the mechanism is safe outside the assumptions written in the source.

What has to be true

  • You are implementing BIP 22 at the status the text itself states: Deployed.
  • The object that has to change is JSON, RPC. A neighbouring document with a similar name is not this one.
  • Status in the header is not adoption.

What happened after the paper

The source marks this deployed. That is a statement about the text, not a promise that every wallet or node has shipped it. Later documents can narrow, replace, or ignore this one. Cite the number you mean.

What to check before you use the idea

  • What must an implementation of getblocktemplate - Fundamentals accept, and what may it ignore?
  • Is this consensus, peer policy, or an application interface?
  • Which names does the text pin down: JSON, RPC?

Terms

BIP 22
The public text titled getblocktemplate - Fundamentals.
Deployed
The document's own label for how finished the text is. It is not a market fact.

The problem the paper names

An interface that is only a name in a repository will be re-implemented differently by every team, which is how shared contracts break.

What the design proposes

  • A new JSON-RPC method for "smart" Bitcoin miners and proxies.
  • Instead of sending a simple block header for hashing, the entire block structure is sent, and left to the miner to (optionally) customize and assemble.
  • bitcoind's JSON-RPC server can no longer support the load of generating the work required to productively mine Bitcoin, and external software specializing in work generation has become necessary.

How the mechanism is specified

  • Taken from the specification, the next constraint is: Instead of sending a simple block header for hashing, the entire block structure is sent, and left to the miner to (optionally) customize and assemble.
  • Locate JSON, RPC in BIP 22 and apply it to one transaction or call.
  • Then check the failure the class of rule always has: a node that did not upgrade, a reverted call, a replayed signature, or a peer that does not speak the message.

What this page does not treat as proven

  • This document does not set a fee, a valuation, or a security proof.
  • Status in the header is not adoption.
  • The source marks this deployed. That is a statement about the text, not a promise that every wallet or node has shipped it.

Why a venture studio still reads it

Use BIP 22 when a pitch says 'getblocktemplate - Fundamentals' without saying whether the rule is consensus, policy, or an interface. The number is the citation. The pitch is not.

This is Blockchain Lab's reading of a public design paper. It is not the paper, not a copy of it, and not an offer of tokens, equity, custody or a partnership. Later network behaviour can diverge from the text. Nothing here is investment, legal or technical advice.

Research status: Design paper. Last reviewed: 1 October 2026. This is a reading of a public paper, not investment, legal or security advice.