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Documentation Index

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Defined in EIP-695
Returns the currently configured chain ID, a value used in replay-protected transaction signing as introduced by EIP-155.

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Parameters

This method does not accept any parameters.

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Returns

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result
string
A hexadecimal string representing the chain ID.
{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "eth_chainId",
  "params": []
}

{
  "id": 1,
  "jsonrpc": "2.0",
  "result": "0x1"
}

​
Error Handling

CodeMessageDescription
4100Requested method not supportedThe method is not supported by the wallet
Common chain IDs: Ethereum Mainnet (0x1), Base Mainnet (0x2105), Base Sepolia (0x14a34).