Setup Your ChainID
Learn how to setup ChainID for your own blockchain.
What is ChainID?
The ChainID of an EVM blockchain is a unique identifier that distinguishes Ethereum chains from one another. Introduced in Ethereum Improvement Proposal (EIP) 155, this mechanism prevents transaction replay attacks, which could occur when the same transaction is valid across multiple chains.
Setting the ChainID
To set the ChainID for your blockchain, configure it in the genesis JSON file at the top level with the value 99999.
If you wish to use a custom ChainID, check chainlist.org to ensure your proposed ChainID is not in use by any other network. Be sure to cross-check with Testnets as well!
