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Parameters
none
Response
quantity
— EIP-155 Chain ID
eth_chainId
code examples
Use case
One possible use case for theeth_chainId
method in Avalanche is to determine which chain a user is connected to when using a DApp with the MetaMask browser extension. This can be useful to provide a customized user experience based on the specific chain that the user is interacting with.
Here is an example of how the eth_chainId
method might be used in this context with MetaMask. Keep in mind that the Chain ID is returned as a hexadecimal value:
JavaScript
checkChain
function is called to get the current chain ID using the Ethereum object provided by MetaMask. The chain ID is then checked to determine if the user is connected to the Avalanche mainnet and calls the promtSwitch
function to prompt the user to switch chain in case the chain ID returned does not match the desiredChainId
constant.Body
application/json
Response
200 - application/json
The network Chain ID
The response is of type object
.