Get Chain Epoch Committee.

Gets the HDS information of the specified block confirmed by the main chain, including the block header of the main chain containing the block header (chainid + height) and the packed sub chain block header information (HDS).

Gets the block header and sub chain block header information contained in the block specified by chainid+height.

Returns the number of saved transaction indexes and errors.

Block Cursor.

Record the block height cursors of all the children chains that have been packaged and confirmed on the parent chain (current is the parent chain).

Save transation index in the block.

Save Chain Epoch Committee.

Save all cursors of children chains which have been recorded on parent(reported to) chain (current is one of children chains) chainId: current chain id parentId: chain id reported to block: block of parent chain.