ESCROW SYSTEM AND TRANSACTION METHOD

It is provided the technology to ensure the execution of proper transactions. One aspect of the present disclosure is an escrow system that includes a group of nodes and a blockchain network that connects each node of the group of nodes. In the escrow system, an escrow node sets, with respect to a transaction relating to a product or a service between a user and a first node, a multi-signature address between the first node and the escrow node in the blockchain network. The first node, in response to a completion notification of payment of a cost relating to the transaction by the user to the escrow node, executes the transaction and transmits a signature and a fulfillment notification of the transaction to the multi-signature address. The escrow node, in response to an execution of the transaction by the first node, transmits a signature and a fulfillment notification of the transaction to the multi-signature address. The first node, in response to the signature and the fulfillment notification of the transaction from the first node and the escrow node to the multi-signature address, receives a payment notification of the cost.