LibraryData and agents2018Design paperCorpus record
Contract Ownership Standard
ERC 173. Nick Mudge , Dan Finlay.
ERC 173, Contract Ownership Standard. This specification defines standard functions for owning or controlling a contract.
Status in the source: Final. A reading of the public specification, not a copy of it and not a certification.
Contract Ownership Standard is worth reading for the rule it actually adds: This specification defines standard functions for owning or controlling a contract.
The five-minute read
The rule
This specification defines standard functions for owning or controlling a contract.
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 ERC173, ERC165 or it is a different design.
One action, walked through
- Open ERC 173 and read the status line before the examples.
- Write down the rule in one sentence. A fair version of that sentence is: This specification defines standard functions for owning or controlling a contract.
- Name the object that changes: ERC173, ERC165.
- 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 173 can settle the shape of Contract Ownership Standard. 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 173 at the status the text itself states: Final.
- The object that has to change is ERC173, ERC165. 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 Contract Ownership Standard accept, and what may it ignore?
- Is this consensus, peer policy, or an application interface?
- Which names does the text pin down: ERC173, ERC165?
Terms
- ERC 173
- The public text titled Contract Ownership Standard.
- 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
- This specification defines standard functions for owning or controlling a contract.
- An implementation allows reading the current owner (owner() returns (address)) and transferring ownership (transferOwnership(address newOwner)) along with a standardized event for when ownership is changed (OwnershipTransferred(address indexed previousOwner, address indexed newOwner)).
- Many smart contracts require that they be owned or controlled in some way.
How the mechanism is specified
- Taken from the specification, the next constraint is: An implementation allows reading the current owner (owner() returns (address)) and transferring ownership (transferOwnership(address newOwner)) along with a standardized event for when ownership is changed (OwnershipTransferred(address indexed previousOwner, address indexed newOwner)).
- Locate ERC173, ERC165 in ERC 173 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 ERC 173 when a pitch says 'Contract Ownership Standard' 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.
