Abstract: A method for processing data for a blockchain, the method adapted to an unspent transaction output system of the blockchain and applied to a blockchain node, the method including: receiving first transaction data sent by a client, wherein the first transaction data includes transaction input data and transaction output data, wherein the transaction output data includes 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 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 ou