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LibraryScaling2024Design paperCorpus record

Blob Transactions Metadata JSON Schema

ERC 7588. Gavin Fu , Leo Wang , Bova Chen , Aiden X.

ERC 7588, Blob Transactions Metadata JSON Schema. A standard for attaching metadata to blobs carried by blob transactions, as outlined in EIP-4844.

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

Blob Transactions Metadata JSON Schema is worth reading for the rule it actually adds: A standard for attaching metadata to blobs carried by blob transactions, as outlined in EIP-4844.

The five-minute read

The rule

A standard for attaching metadata to blobs carried by blob transactions, as outlined in EIP-4844.

What was already failing

An underpriced or ambiguous EVM rule is not a feature. It is a block that takes longer than the gas limit claimed, or a client that disagrees about the result.

What the number does not mean

The source marks this final. 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, KZG or it is a different design.

One action, walked through

  1. Open ERC 7588 and read the status line before the examples.
  2. Write down the rule in one sentence. A fair version of that sentence is: A standard for attaching metadata to blobs carried by blob transactions, as outlined in EIP-4844.
  3. Name the object that changes: JSON, KZG.
  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

Ethereum Request for Comment 7588 can settle the shape of Blob Transactions Metadata JSON Schema. 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 ERC 7588 at the status the text itself states: Final.
  • The object that has to change is JSON, KZG. A neighbouring document with a similar name is not this one.
  • Constants in the text can be superseded by a later fork. Cite the EIP number and the fork you mean.

What happened after the paper

The source marks this final. 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 does Blob Transactions Metadata JSON Schema charge, reject, or redefine on the first touch versus a later one?
  • Does a reverted subcall roll the change back?
  • Can you point at the object in a client: JSON, KZG?

Terms

ERC 7588
The public text titled Blob Transactions Metadata JSON Schema.
Final
The document's own label for how finished the text is. It is not a market fact.

The problem the paper names

An underpriced or ambiguous EVM rule is not a feature. It is a block that takes longer than the gas limit claimed, or a client that disagrees about the result.

What the design proposes

  • A standard for attaching metadata to blobs carried by blob transactions, as outlined in EIP-4844.
  • The metadata is represented as a JSON object adhering to a predefined schema, and its string representation is placed in the data field of the blob transaction.
  • EIP-4844 defines a new type of transaction known as a “blob transaction.” These transactions contain a list of blobs along with their KZG commitments and proofs.

How the mechanism is specified

  • Taken from the specification, the next constraint is: The metadata is represented as a JSON object adhering to a predefined schema, and its string representation is placed in the data field of the blob transaction.
  • Locate JSON, KZG in ERC 7588 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

  • A gas or opcode change is not a throughput benchmark. It is a relative price and a validity rule.
  • Constants in the text can be superseded by a later fork. Cite the EIP number and the fork you mean.
  • The source marks this final. 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 ERC 7588 when a pitch says 'Blob Transactions Metadata JSON Schema' 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.