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OrchardCommitmentTree

privacy_core::commitment_tree

Struct OrchardCommitmentTree 

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

BN254 Poseidon note commitment tree.

Leaf values are BN254 Fr elements encoded big-endian (as emitted by the EVM NoteAdded event); internally the tree works in little-endian field representation.

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impl OrchardCommitmentTree

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pub fn new() -> Self

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pub fn append(&mut self, cmx_be: [u8; 32]) -> Option<u64>

Append a big-endian cmx (as from an EVM log) as the next leaf. Always Some(pos).

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pub fn checkpoint(&mut self, checkpoint_id: u64) -> bool

Register a checkpoint label (Ethereum block number). The tree is append-only.

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pub fn latest_root(&self) -> Option<[u8; 32]>

Merkle root (LE 32 bytes). None when the tree is empty.

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pub fn merkle_path( &self, position: u64, _checkpoint_id: u64, ) -> Option<OrchardMerklePath>

Authentication path for the leaf at position (current tree state). None if OOB.

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pub fn size(&self) -> u64

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pub fn latest_checkpoint_id(&self) -> Option<u64>

Trait Implementations§

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impl Default for OrchardCommitmentTree

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fn default() -> Self

Returns the “default value” for a type. Read more

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