Transaction mode-based electronic contract preservation system

A transaction-based electronic contract deposit system, comprising an electronic contract platform and a blockchain deposit platform, the blockchain deposit platform comprising a plurality of deposit nodes that provide deposit services for the electronic contract platform, wherein

• the electronic contract platform is configured to perform:
• a deposit information generating step:
• preprocessing an electronic contract, to obtain deposit information;
• a data processing step:
• encrypting and discretizing the deposit information, to generate a corresponding data tree;
• a transaction constructing step:
• constructing a deposit transaction, wherein an initiator of the deposit transaction is a user, a receiver is the electronic contract platform, and the deposit transaction is commonly signed by a private key of the user and a private key of the electronic contract platform;
• and
• a data sending step:
• sending the deposit information, the data tree, and the deposit transaction to the blockchain deposit platform;
• and
• the deposit node is configured to perform:
• a verifying step:
• verifying legitimacy, integrity, and validity of the received deposit information, data tree, and deposit transaction by using a public key of the user and a public key of the electronic contract platform;
• a data block generating step:
• generating a data block based on the deposit information, the data tree, and the deposit transaction, and stamping the data block with a time stamp;
• a step of uploading and storing on a chain:
• uploading and storing the deposit information, the data tree, the deposit transaction, and the data block on a chain;
• a transaction hash operation step:
• performing a hash operation on the deposit transaction, to obtain a transaction hash value;
• a step of transmitting data back:
• transmitting the deposit information, the data tree, the deposit transaction, the data block, and the transaction hash value back to the electronic contract platform;
• and
• a step of continuing to transmit the data:
• transmitting the deposit information, the data tree, the deposit transaction, the data block, and the transaction hash value to a next deposit node.