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Limit account nonce to 2^64-1

EIP 2681. Alex Beregszaszi.

EIP 2681, Limit account nonce to 2^64-1. Account nonces are currently specified to be arbitrarily long unsigned integers.

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

Limit account nonce to 2^64-1 is worth reading for the rule it actually adds: Account nonces are currently specified to be arbitrarily long unsigned integers.

The five-minute read

The rule

Account nonces are currently specified to be arbitrarily long unsigned integers.

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 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 CREATE, CREATE2 or it is a different design.

One action, walked through

  1. Open EIP 2681 and read the status line before the examples.
  2. Write down the rule in one sentence. A fair version of that sentence is: Account nonces are currently specified to be arbitrarily long unsigned integers.
  3. Name the object that changes: CREATE, CREATE2.
  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 Improvement Proposal 2681 can settle the shape of Limit account nonce to 2^64-1. 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 EIP 2681 at the status the text itself states: Final.
  • The object that has to change is CREATE, CREATE2. 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 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 must an implementation of Limit account nonce to 2^64-1 accept, and what may it ignore?
  • Is this consensus, peer policy, or an application interface?
  • Which names does the text pin down: CREATE, CREATE2?

Terms

EIP 2681
The public text titled Limit account nonce to 2^64-1.
Final
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

  • Account nonces are currently specified to be arbitrarily long unsigned integers.
  • Dealing with arbitrary length data in the state witnesses is not optimal, therefore this EIP will allow proofs to represent the nonce in a more optimized way.
  • Additionally it could prove beneficial to transaction formats, where some improvements are potentially sought by at least three other proposals.

How the mechanism is specified

  • Taken from the specification, the next constraint is: Dealing with arbitrary length data in the state witnesses is not optimal, therefore this EIP will allow proofs to represent the nonce in a more optimized way.
  • Locate CREATE, CREATE2 in EIP 2681 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 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 EIP 2681 when a pitch says 'Limit account nonce to 2^64-1' 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.