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ethclient: add comment describing block number tags (#30984)

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Adds a comment on how to use rpc.*BlockNumber and the explanation of the block number tags

---------

Co-authored-by: Gary Rong <garyrong0905@gmail.com>
This commit is contained in:
EdisonSR 2025-02-18 18:15:36 +08:00 committed by GitHub
parent 68d477670c
commit 7332a1bc0a
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1 changed files with 31 additions and 6 deletions
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37
ethclient/ethclient.go
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@ -85,11 +85,23 @@ func (ec *Client) BlockByHash(ctx context.Context, hash common.Hash) (*types.Blo
return ec.getBlock(ctx, "eth_getBlockByHash", hash, true)
}
// BlockByNumber returns a block from the current canonical chain. If number is nil, the
// latest known block is returned.
// BlockByNumber returns a block from the current canonical chain.
// If `number` is nil, the latest known block is returned.
//
// Note that loading full blocks requires two requests. Use HeaderByNumber
// if you don't need all transactions or uncle headers.
// Use `HeaderByNumber` if you don't need full transaction data or uncle headers.
//
// Supported special block number tags:
// - `earliest` : The genesis (earliest) block
// - `latest` : The most recently included block
// - `safe` : The latest safe head block
// - `finalized` : The latest finalized block
// - `pending` : The pending block
//
// Example usage:
//
// ```go
// BlockByNumber(context.Background(), big.NewInt(int64(rpc.LatestBlockNumber)))
// ```
func (ec *Client) BlockByNumber(ctx context.Context, number *big.Int) (*types.Block, error) {
return ec.getBlock(ctx, "eth_getBlockByNumber", toBlockNumArg(number), true)
}
@ -210,8 +222,21 @@ func (ec *Client) HeaderByHash(ctx context.Context, hash common.Hash) (*types.He
return head, err
}
// HeaderByNumber returns a block header from the current canonical chain. If number is
// nil, the latest known header is returned.
// HeaderByNumber returns a block header from the current canonical chain.
// If `number` is nil, the latest known block header is returned.
//
// Supported special block number tags:
// - `earliest` : The genesis (earliest) block
// - `latest` : The most recently included block
// - `safe` : The latest safe head block
// - `finalized` : The latest finalized block
// - `pending` : The pending block
//
// Example usage:
//
// ```go
// HeaderByNumber(context.Background(), big.NewInt(int64(rpc.LatestBlockNumber)))
// ```
func (ec *Client) HeaderByNumber(ctx context.Context, number *big.Int) (*types.Header, error) {
var head *types.Header
err := ec.c.CallContext(ctx, &head, "eth_getBlockByNumber", toBlockNumArg(number), false)