Re: Getting block height -Fabric-sdk-jAVA #fabric-sdk-java


Mark Lewis
 

You should be able to use evaluateTransaction() to invoke the GetChainInfo transaction function on the qscc system chaincode. The response will be a serialized BlockchainInfo protocol buffer object, which can be deserialized, and has (amongst other things) the block height.

Something along the lines of:

Contract qscc = network.getContract("qscc");
byte[] result = contract.evaluateTransaction("GetChainInfo");
Ledger.BlockchainInfo info = Ledger.BlockchainInfo.parseFrom(result);
long blockHeight = info.getHeight();

Bear in mind that this is the current block height of whichever peer evaluated the transaction. Other peers may have different block heights at that point in time.

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