How to implement Chaincode to Query all blocks transactions

How to implement Chaincode to Query all blocks transactions

I want to deploy chain code to extract transactions from all blocks in the network. Does the QSCC query chain code should include INIT and INVOKE method or just only query function.

I want to deploy chain code to extract transactions from all blocks in the network. Does the QSCC query chain code should include INIT and INVOKE method or just only query function.

Please help me to understand in depth.

I referred the below GitHub query, but i am confused with INIT and INVOKE in the query.

https://github.com/hyperledger/fabric/blob/master/core/scc/qscc/query.go

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