Method and apparatus for processing data for a blockchain

A method for processing data for a blockchain, the method is adapted to an unspent transaction output system of the blockchain and applied to a blockchain node, the method comprising:

• receiving first transaction data sent by a client, wherein the first transaction data comprises transaction input data and transaction output data, wherein the transaction output data comprises:
• a category identification, a transaction amount, a recipient address and additional information, wherein the category identification is configured to indicate whether the first transaction data is associated with a smart contract, and the additional information is configured to indicate information required for operating the smart contract when the first transaction data is associated with the smart contract;
• and
• when the first transaction data is associated with the smart contract, storing the first transaction data into the blockchain via consensus verification with other blockchain nodes, and storing a corresponding smart contract status into a local database for each blockchain node based on the transaction output data.