how to get a BlockInfo by fabric-gateway?

[diandiankou]

i can get a BlockInfo through the fabric-gatway-Java repo, for example:

Channel channel = network.getChannel();
BlockInfo blockInfo = channel.queryBlockByNumber(Long.parseLong(txId));

But how can I get a BlockInfo through the fabric-gatway repo? I haven't seen any similar interfaces.

[bestbeforetoday]

You can use the fabric-gateway API to evaluate the GetBlockByNumber transactions function on the qscc system chaincode. This returns a serialized Block protocol buffer message. See the answer to this question for more details on how to unpack the Block.

An alternative is to use the fabric-gateway API to retrieve blocks from the desired block number, read the first block, and then close the block iterator (unless you want to read subsequent blocks).