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internal/ethapi: add note about eth_chainId compatibility with EIP-695 #25168

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Jun 25, 2022
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5 changes: 5 additions & 0 deletions internal/ethapi/api.go
Original file line number Diff line number Diff line change
Expand Up @@ -609,6 +609,11 @@ func NewBlockChainAPI(b Backend) *BlockChainAPI {
}

// ChainId is the EIP-155 replay-protection chain id for the current Ethereum chain config.
//
// Note, this method does not conform to EIP-695 because the configured chain ID is always
// returned, regardless of the current head block. We used to return an error when the chain
// wasn't synced up to a block where EIP-155 is enabled, but this behavior caused issues
// in CL clients.
func (api *BlockChainAPI) ChainId() *hexutil.Big {
return (*hexutil.Big)(api.b.ChainConfig().ChainID)
}
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