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Committer

starkom_pcs

Struct Committer 

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pub struct Committer<H: Hash<Scalar>> { /* private fields */ }
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Collects batches of polynomials and allows building a DEEP-FRI prover for them.

This works by building Merkle trees on the batched polynomials, one tree per batch, and eventually handing everything over to a newly constructed Prover (see the commit method).

This two-stage Committer-Prover architecture allows getting Merkle roots for the proven polynomials before running the FRI folding argument and even before batching all polynomials, so that Fiat-Shamir challenges can be derived before any quotients are built.

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impl<H: Hash<Scalar>> Committer<H>

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pub fn new( degree_bound: usize, blowup_log2: usize, polynomials: Vec<Polynomial>, ) -> Self

Constructs a Committer with the given degree bound, blowup factor, and first batch of polynomials.

We require specifying the first batch because our DEEP-FRI protocol requires at least one committed polynomial to work.

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pub fn degree_bound(&self) -> usize

Returns the proven degree bound.

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pub fn extended_domain_size(&self) -> usize

Returns the size of the extended evaluation domain.

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pub fn num_trees(&self) -> usize

Returns the number of Merkle trees constructed so far, corresponding to the number of polynomial batches.

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pub fn tree(&self, index: usize) -> &Tree<H>

Returns the i-th Merkle tree. index must be less than num_trees().

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pub fn root_hash(&self, index: usize) -> Scalar

Returns the root hash of the i-th Merkle tree. index must be less than num_trees().

This value can be used to derive Fiat-Shamir challenges.

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pub fn add_batch(&mut self, polynomials: Vec<Polynomial>) -> usize

Adds a batch of polynomials, returnin the index of the newly created batch.

The returned index can be used with the tree and root_hash methods to get the Merkle tree and root hash for the batch, respectively.

REQUIRES: the degree of all specified polynomials must be strictly less than degree_bound().

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pub fn commit(self, points: BTreeSet<Scalar>) -> (Commitment, Prover<H>)

Consumes the Committer, calculates all DEEP quotients, and returns a polynomial Commitment and a DEEP-FRI Prover.

points is the set of points to open in the Prover. The contained scalars are (off-domain) X-coordinates; the corresponding Y-coordinates will be computed automatically for every batched polynomial.

Trait Implementations§

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impl<H: Clone + Hash<Scalar>> Clone for Committer<H>

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fn clone(&self) -> Committer<H>

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<H: Debug + Hash<Scalar>> Debug for Committer<H>

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<H> Freeze for Committer<H>

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impl<H> RefUnwindSafe for Committer<H>
where H: RefUnwindSafe,

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impl<H> Send for Committer<H>
where H: Send,

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impl<H> Sync for Committer<H>
where H: Sync,

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impl<H> Unpin for Committer<H>
where H: Unpin,

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impl<H> UnsafeUnpin for Committer<H>

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impl<H> UnwindSafe for Committer<H>
where H: UnwindSafe,

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> Conv for T

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fn conv<T>(self) -> T
where Self: Into<T>,

Converts self into T using Into<T>. Read more
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impl<T> FmtForward for T

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fn fmt_binary(self) -> FmtBinary<Self>
where Self: Binary,

Causes self to use its Binary implementation when Debug-formatted.
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fn fmt_display(self) -> FmtDisplay<Self>
where Self: Display,

Causes self to use its Display implementation when Debug-formatted.
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fn fmt_lower_exp(self) -> FmtLowerExp<Self>
where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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fn fmt_lower_hex(self) -> FmtLowerHex<Self>
where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.
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fn fmt_octal(self) -> FmtOctal<Self>
where Self: Octal,

Causes self to use its Octal implementation when Debug-formatted.
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fn fmt_pointer(self) -> FmtPointer<Self>
where Self: Pointer,

Causes self to use its Pointer implementation when Debug-formatted.
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where Self: UpperExp,

Causes self to use its UpperExp implementation when Debug-formatted.
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fn fmt_upper_hex(self) -> FmtUpperHex<Self>
where Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted.
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fn fmt_list(self) -> FmtList<Self>
where &'a Self: for<'a> IntoIterator,

Formats each item in a sequence. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Pipe for T
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fn pipe<R>(self, func: impl FnOnce(Self) -> R) -> R
where Self: Sized,

Pipes by value. This is generally the method you want to use. Read more
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where R: 'a,

Borrows self and passes that borrow into the pipe function. Read more
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Mutably borrows self and passes that borrow into the pipe function. Read more
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where Self: AsRef<U>, U: 'a + ?Sized, R: 'a,

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where Self: AsMut<U>, U: 'a + ?Sized, R: 'a,

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type Output = T

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fn tap(self, func: impl FnOnce(&Self)) -> Self

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Calls .tap_ref() only in debug builds, and is erased in release builds.
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Calls .tap_ref_mut() only in debug builds, and is erased in release builds.
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fn tap_deref_dbg<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Calls .tap_deref() only in debug builds, and is erased in release builds.
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type Owned = T

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fn vzip(self) -> V