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SaveBlocksInput

reth_provider::providers

Struct SaveBlocksInput 

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pub struct SaveBlocksInput<N: NodePrimitives = EthPrimitives> { /* private fields */ }
Expand description

Input for advancing the engine’s two persistence frontiers.

The Finish checkpoint’s block number (db_tip) tracks complete block, execution, and history data. Finish.partial_state_trie tracks the hashed-state/trie frontier, which may lag behind it while a suffix of blocks is retained in memory as a mask. The hashed-state/trie tables are not a complete snapshot at db_tip while this suffix exists; the database and in-memory mask together represent the canonical state.

blocks contains every canonical block in (prev_partial_state_trie, new_db_tip], ordered from oldest to newest. The four frontiers derive the ranges written during this operation:

  • (prev_db_tip, new_db_tip]: persist block, execution, and history data, if the database frontier advances;
  • (prev_partial_state_trie, new_partial_state_trie]: consider hashed-state/trie updates for persistence; and
  • (new_partial_state_trie, new_db_tip]: retain as the masking suffix and do not persist its hashed-state/trie updates.

Updates in the second range that are overwritten by the masking suffix are also omitted. This is the work partial persistence avoids: only the newest value needs to be applied later when the masking block leaves memory. If both new frontiers are equal, the masking suffix is empty and hashed state/trie are fully flushed through new_db_tip.

Genesis must already be initialized because this input only advances an existing database tip.

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impl<N: NodePrimitives> SaveBlocksInput<N>

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pub fn new( blocks: Vec<ExecutedBlock<N>>, prev_db_tip: BlockNumber, prev_partial_state_trie: BlockNumber, new_db_tip: BlockNumber, new_partial_state_trie: BlockNumber, ) -> Self

Creates an input that advances the existing frontiers to new_db_tip and new_partial_state_trie.

Either frontier may advance independently. new_partial_state_trie may remain behind prev_db_tip while a masking window grows, and new_db_tip may remain unchanged while the state/trie frontier catches up.

§Panics

Panics if either frontier moves backwards, neither frontier advances, the state/trie frontier exceeds the database frontier, or blocks is not the exact contiguous range (prev_partial_state_trie, new_db_tip].

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pub const fn prev_db_tip(&self) -> BlockNumber

Returns the previous Finish checkpoint block number.

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pub const fn prev_partial_state_trie(&self) -> BlockNumber

Returns the previous Finish.partial_state_trie frontier.

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pub const fn new_db_tip(&self) -> BlockNumber

Returns the new Finish checkpoint block number.

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pub const fn new_partial_state_trie(&self) -> BlockNumber

Returns the new Finish.partial_state_trie frontier.

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pub fn last_block(&self) -> BlockNumHash

Returns the block at the new Finish checkpoint.

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pub fn first_persist_rest_block(&self) -> Option<&ExecutedBlock<N>>

Returns the first block whose block, execution, and history data will be persisted.

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pub fn persist_rest_blocks(&self) -> &[ExecutedBlock<N>]

Returns newly persisted blocks whose block, execution, and history data should be written.

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pub fn state_trie_blocks(&self) -> &[ExecutedBlock<N>]

Returns all blocks whose hashed-state/trie updates are candidates for persistence.

Updates overwritten by Self::state_trie_masking_blocks are filtered out by the writer.

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pub fn state_trie_masking_blocks(&self) -> &[ExecutedBlock<N>]

Returns the fixed suffix whose hashed-state/trie updates remain in memory.

This suffix suppresses older updates to the same hashed keys and trie nodes. It is also the overlay required to use the database at the new Finish checkpoint.

Trait Implementations§

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impl<N: Debug + NodePrimitives> Debug for SaveBlocksInput<N>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

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Size: 56 bytes