Module encoding 

Key encoding helpers for RocksDB keys (hash, height, epoch, metadata).

Normative

• KEY-001 — hash keys
• KEY-002 — height keys
• KEY-003 — epoch keys
• KEY-004 — metadata UTF-8 keys
• Crate-root re-exports: STR-003

Rationale: Big-endian u64 keys (height_key, epoch_key) preserve lexicographic order equal to numeric order, enabling efficient range scans. Hash keys are raw Bytes32 with no prefix (chia_protocol::Bytes32).

Functions

decode_epoch_key

Decode an epoch key produced by epoch_key (KEY-003).

decode_height_key

Decode a height key produced by height_key (KEY-002).

epoch_key

Encode an epoch number as an 8-byte big-endian key for crate::constants::CF_CHECKPOINTS (KEY-003, NORMATIVE §KEY-003).

hash_key

Raw 32-byte RocksDB key for CF_BLOCKS, CF_HEADERS, and CF_ATTESTED (KEY-001).

height_key

Encode a chain height as an 8-byte big-endian key for crate::constants::CF_CANONICAL (KEY-002).

metadata_key

UTF-8 bytes for a metadata key name in crate::constants::CF_METADATA (KEY-004, NORMATIVE §KEY-004).