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ethclient: add NetworkID method (#14791) 

There is currently no simple way to obtain the network ID from a Client. 
This adds a NetworkID method that wraps the net_version JSON-RPC call.
This commit is contained in:
Jim McDonald 2017-08-01 09:59:46 +01:00 committed by Felix Lange
parent 60c858a529
commit bc0e6a5e68
1 changed files with 13 additions and 0 deletions
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13
ethclient/ethclient.go
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@ -256,6 +256,19 @@ func (ec *Client) SubscribeNewHead(ctx context.Context, ch chan<- *types.Header)
// State Access
// NetworkID returns the network ID (also known as the chain ID) for this chain.
func (ec *Client) NetworkID(ctx context.Context) (*big.Int, error) {
version := new(big.Int)
var ver string
if err := ec.c.CallContext(ctx, &ver, "net_version"); err != nil {
return nil, err
}
if _, ok := version.SetString(ver, 10); !ok {
return nil, fmt.Errorf("invalid net_version result %q", ver)
}
return version, nil
}
// BalanceAt returns the wei balance of the given account.
// The block number can be nil, in which case the balance is taken from the latest known block.
func (ec *Client) BalanceAt(ctx context.Context, account common.Address, blockNumber *big.Int) (*big.Int, error) {