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Protobuf is Google’s serializing structured data with the language-neutral, platform-neutral and extensible mechanism. The serialize structured data is compiled in bytes and smaller, faster, simpler compared to traditional data formats like XML or. JSON data format is compiled directly to the protobuf message format invokes the SmartContracts. The data is stored in the CouchDB as a world state record. The objects are stored as key-value pair in the. data format in the data format.