CROSS-BLOCKCHAIN INTERACTION METHOD, APPARATUS, SYSTEM, AND ELECTRONIC DEVICE

A subscription request initiated by a blockchain node associated with a first blockchain is received by a cross-blockchain interaction end, where the subscription request includes a subscription condition. A message that satisfies the subscription condition is obtained by the cross-blockchain interaction end and from a publishing client that corresponds to a second blockchain. The message is sent to a subscribing client that corresponds to the blockchain node a from the cross-blockchain interaction end, where the blockchain node calls a first smart contract associated with the first blockchain to trigger a corresponding contract operation based on the message.