Block chain cross-chain method and device, equipment, medium and product

The invention discloses a block chain cross-chain method and device, equipment, a medium and a product, and belongs to the technical field of block chain cross-chain. In the application, according to identity information of each heterogeneous TEE, each heterogeneous TEE is grouped, a public key and a private key of each TEE group are generated, and the public key of each TEE group is stored on a target chain contract. The cross-chain data acquired through the source chain contract is signed by using the private key of each TEE group in each TEE group to obtain a digital signature of each TEE group, and the digital signature of each TEE group is verified by using the public key of each TEE group stored on the target chain contract on the target chain. And executing a cross-chain operation from a source chain to a target chain on the cross-chain data according to a verification result obtained by verifying the digital signature of each TEE group. 本申请公开了一种区块链跨链方法、装置、设备、介质及产品，属于区块链跨链的技术领域。在本申请中，根据各异构TEE的身份信息，对各异构