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CheckpointBuilder

dig_block::builder::checkpoint_builder

Struct CheckpointBuilder 

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pub struct CheckpointBuilder { /* private fields */ }
Expand description

Accumulates per-epoch block hashes, fees, tx counts, and withdrawal commitments.

CheckpointBuilder::build materializes a Checkpoint with Merkle block_root / withdrawals_root (CKP-006).

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impl CheckpointBuilder

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pub fn new(epoch: u64, prev_checkpoint: Bytes32) -> Self

Start an epoch summary builder: link to prev_checkpoint, initialize empty accumulators (CKP-006).

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pub fn add_block(&mut self, block_hash: Bytes32, tx_count: u64, fees: u64)

Append one L2 block’s identity hash and roll up its tx_count and fees (CKP-006).

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pub fn set_state_root(&mut self, state_root: Bytes32)

Set the finalized L2 state root for this epoch (CKP-006).

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pub fn add_withdrawal(&mut self, withdrawal_hash: Bytes32)

Append one withdrawal record hash (leaf material for withdrawals_root) (CKP-006).

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pub fn build(self) -> Checkpoint

Finalize: compute Merkle roots over accumulated hashes and return an owned Checkpoint (CKP-006).

block_count / withdrawal_count: Derived from vector lengths, cast to u32 per Checkpoint layout (CKP-001). Protocol epochs must stay within u32 item counts; if lengths exceed u32::MAX, the cast truncates — callers must bound work.

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