Chain ID

A chain ID is a unique identifier that represents a blockchain network. We use it to distinguish different blockchain networks from each other and to ensure that transactions and messages are sent to the correct network. Neura network follows the format of identifier_EIP155-version format.

Official Chain IDs

Mainnet

Name	Chain ID	Identifier	Version	Active
Neura	266	neura	-	🚫

Testnet

Name	Chain ID	Identifier	Version	Active
Neura Testnet	267	neura	1	✅

Devnet

Name	Chain ID	Identifier	Version	Active
Neura Devnet	268	neura	1	✅

You can also look up the EIP155 Chain ID by referring to chainlist.org.

The Chain Identifier

Every chain must have a unique identifier or chain-id. Tendermint requires each application to define its own chain-id in the genesis.json fields. However, in order to comply with both EIP155 and Cosmos standard for chain upgrades, Neura-compatible chains must implement a special structure for their chain identifiers.

Structure

The Neura Chain ID contains 3 main components

• Identifier: Unstructured string that defines the name of the application.

• EIP155 Number: Immutable EIP155 CHAIN_ID that defines the replay attack protection number.

• Version Number: Is the version number (always positive) that the chain is currently running. This number MUST be incremented every time the chain is upgraded or forked in order to avoid network or consensus errors.

Format

The format for specifying the Neura-compatible chain-id in genesis is the following:

{identifier}_{EIP155}-{version}

The following are ChainIDs for Neura Testnet and Neura Devnet:

Name	ChainID	Identifier	EIP155 Number	Version Number
Neura	neura_266-1	neura	266	-
Neura Testnet	neura_267-1	neura	267	1
Neura Devnet	neura_268-1	neura	268	1