Create `eth_chainId` method for JSON-RPC

The five-minute read

One action, walked through

1. Open EIP 695 and read the status line before the examples.
2. Write down the rule in one sentence. A fair version of that sentence is: Include eth_chainId method in eth_-namespaced JSON-RPC methods.
3. Name the object that changes: JSON, RPC, STRING.
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 EIP 695 at the status the text itself states: Final.
• The object that has to change is JSON, RPC, STRING. 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 Create `eth_chainId` method for JSON-RPC accept, and what may it ignore?
• Is this consensus, peer policy, or an application interface?
• Which names does the text pin down: JSON, RPC, STRING?

Terms

EIP 695

The public text titled Create `eth_chainId` method for JSON-RPC.

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

• Include eth_chainId method in eth_-namespaced JSON-RPC methods.
• The eth_chainId method should return a single STRING result for an integer value in hexadecimal format, describing the currently configured CHAIN_ID value used for signing replay-protected transactions, introduced by EIP-155.
• Currently although we can use net_version RPC call to get the current network ID, there's no RPC for querying the chain ID.

How the mechanism is specified

• Taken from the specification, the next constraint is: The eth_chainId method should return a single STRING result for an integer value in hexadecimal format, describing the currently configured CHAIN_ID value used for signing replay-protected transactions, introduced by EIP-155.
• Locate JSON, RPC, STRING in EIP 695 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 695 when a pitch says 'Create `eth_chainId` method for JSON-RPC' without saying whether the rule is consensus, policy, or an interface. The number is the citation. The pitch is not.