flow-models/models/descriptions/parent_id.md

{% docs parent_id %} The hash of the parent block for the current block on the Flow blockchain. Data type: STRING. This field establishes the chain structure by linking each block to its predecessor, enabling chain traversal and reorganization analysis. Example: 'a1b2c3d4...' (the block hash of the previous block). Used for lineage analysis, fork detection, and chain integrity verification. {% enddocs %}