Pseudo-introspection Registry Contract

The five-minute read

One action, walked through

1. Open ERC 820 and read the status line before the examples.
2. Write down the rule in one sentence. A fair version of that sentence is: This standard defines a universal registry smart contract where any address (contract or regular account) can register which interface it supports and which smart contract is responsible for its implementation.
3. Name the object that changes: MAY, SHALL, ENS.
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 has to be true

• You are implementing ERC 820 at the status the text itself states: Final.
• The object that has to change is MAY, SHALL, ENS. 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 Pseudo-introspection Registry Contract accept, and what may it ignore?
• Is this consensus, peer policy, or an application interface?
• Which names does the text pin down: MAY, SHALL, ENS?

Terms

ERC 820

The public text titled Pseudo-introspection Registry Contract.

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 standard defines a universal registry smart contract where any address (contract or regular account) can register which interface it supports and which smart contract is responsible for its implementation.
• This standard keeps backward compatibility with [ERC-165].
• This standard defines a registry where smart contracts and regular accounts can publish which functionalities they implement---either directly or through a proxy contract.

How the mechanism is specified

• Taken from the specification, the next constraint is: This standard keeps backward compatibility with [ERC-165].
• Locate MAY, SHALL, ENS in ERC 820 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 820 when a pitch says 'Pseudo-introspection Registry Contract' without saying whether the rule is consensus, policy, or an interface. The number is the citation. The pitch is not.