post https://{ronin-network}.gateway.tatum.io/
The eth_chainId method is part of the Ronin JSON-RPC API, specifically designed to return the current network or chain ID.
This method is crucial for ensuring the uniqueness of transactions across different Ronin networks, as it helps in preventing replay attacks by distinguishing between transactions intended for different networks.
The chain ID was introduced as part of EIP-155 to address the issue of transaction replay attacks across different Ronin networks.