pub struct Blockchain { /* private fields */ }Expand description
The Merkle Mountain Range defining the Miden blockchain.
The values of the leaves in the MMR are the commitments of blocks, i.e.
BlockHeader::commitment.
Each new block updates the blockchain by adding the previous block’s commitment to the MMR. This means the chain commitment found in block 10’s header commits to all blocks 0..=9, but not 10 itself. This results from the fact that block 10 cannot compute its own block commitment and thus cannot add itself to the chain. Hence, the blockchain is lagging behind by one block.
Some APIs take a checkpoint which is equivalent to the concept of forest of the underlying MMR. As an example, if the blockchain has 20 blocks in total, and the checkpoint is 10, then the API works in the context of the chain at the time it had 10 blocks, i.e. it contains blocks 0..=9. This is useful, for example, to retrieve proofs that are valid when verified against the chain commitment of block 10.
The maximum number of supported blocks is u32::MAX. This is not validated however.
Implementations§
Source§impl Blockchain
impl Blockchain
Sourcepub fn from_mmr_unchecked(mmr: Mmr) -> Self
pub fn from_mmr_unchecked(mmr: Mmr) -> Self
Construct a new blockchain from an Mmr without validation.
Sourcepub fn num_blocks(&self) -> u32
pub fn num_blocks(&self) -> u32
Returns the number of blocks in the chain.
Sourcepub fn chain_tip(&self) -> Option<BlockNumber>
pub fn chain_tip(&self) -> Option<BlockNumber>
Returns the tip of the chain, i.e. the number of the latest block in the chain, unless the chain is empty.
Sourcepub fn commitment(&self) -> Word
pub fn commitment(&self) -> Word
Returns the chain commitment.
Sourcepub fn peaks_at(&self, checkpoint: BlockNumber) -> Result<MmrPeaks, MmrError>
pub fn peaks_at(&self, checkpoint: BlockNumber) -> Result<MmrPeaks, MmrError>
Returns the peaks of the chain at the state of the given block.
Note that this represents the state of the chain where the block at the given number is not yet in the chain. For example, if the given block number is 5, then the returned peaks represent the chain whose latest block is 4. See the type-level documentation for why this is the case.
§Errors
Returns an error if the specified block exceeds the number of blocks in the chain.
Sourcepub fn open_at(
&self,
block: BlockNumber,
checkpoint: BlockNumber,
) -> Result<MmrProof, MmrError>
pub fn open_at( &self, block: BlockNumber, checkpoint: BlockNumber, ) -> Result<MmrProof, MmrError>
Sourcepub fn partial_mmr_from_blocks(
&self,
blocks: &BTreeSet<BlockNumber>,
checkpoint: BlockNumber,
) -> Result<PartialMmr, MmrError>
pub fn partial_mmr_from_blocks( &self, blocks: &BTreeSet<BlockNumber>, checkpoint: BlockNumber, ) -> Result<PartialMmr, MmrError>
Creates a PartialMmr at the state of the given block. This means the hashed peaks of the
returned partial MMR will match the checkpoint’s chain commitment. This MMR will include
authentication paths for all blocks in the provided blocks set.
§Errors
Returns an error if:
- the specified
latest_block_numberexceeds the number of blocks in the chain. - any block in
blocksis not in the state of the chain specified bylatest_block_number.
Trait Implementations§
Source§impl Clone for Blockchain
impl Clone for Blockchain
Source§fn clone(&self) -> Blockchain
fn clone(&self) -> Blockchain
Returns a duplicate of the value. Read more
1.0.0 · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source. Read moreSource§impl Debug for Blockchain
impl Debug for Blockchain
Source§impl Default for Blockchain
impl Default for Blockchain
Source§impl Deserializable for Blockchain
impl Deserializable for Blockchain
Source§fn read_from<R: ByteReader>(
source: &mut R,
) -> Result<Self, DeserializationError>
fn read_from<R: ByteReader>( source: &mut R, ) -> Result<Self, DeserializationError>
Reads a sequence of bytes from the provided
source, attempts to deserialize these bytes
into Self, and returns the result. Read moreSource§fn read_from_bytes(bytes: &[u8]) -> Result<Self, DeserializationError>
fn read_from_bytes(bytes: &[u8]) -> Result<Self, DeserializationError>
Source§impl Serializable for Blockchain
impl Serializable for Blockchain
Source§fn write_into<W: ByteWriter>(&self, target: &mut W)
fn write_into<W: ByteWriter>(&self, target: &mut W)
Serializes
self into bytes and writes these bytes into the target.Source§fn get_size_hint(&self) -> usize
fn get_size_hint(&self) -> usize
Returns an estimate of how many bytes are needed to represent self. Read more
Auto Trait Implementations§
impl Freeze for Blockchain
impl RefUnwindSafe for Blockchain
impl Send for Blockchain
impl Sync for Blockchain
impl Unpin for Blockchain
impl UnwindSafe for Blockchain
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