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ObjectDescriptor

Struct ObjectDescriptor 

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

Complete object plus exact ordered block hashes. A digest is not authenticity. Deployment must authenticate this descriptor before admitting a transfer.

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impl ObjectDescriptor

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pub fn new( object_hash: String, total_bytes: u64, block_bytes: u32, block_hashes: Vec<String>, limits: TransferLimits, ) -> TransferResult<Self>

Constructs a version-one descriptor with strict lowercase SHA-256 identities.

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pub fn from_reader( reader: impl Read, total_bytes: u64, block_bytes: u32, limits: TransferLimits, ) -> TransferResult<Self>

Reads an exact bounded object incrementally; no complete-object allocation. Callers own source I/O deadlines and authenticity of the resulting descriptor.

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pub fn validate(&self, limits: TransferLimits) -> TransferResult<()>

Validates version, arithmetic and all resource/identity bounds.

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pub fn from_json(bytes: &[u8], limits: TransferLimits) -> TransferResult<Self>

Strict bounded JSON; unknown fields/versions fail at this boundary.

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pub fn to_json(&self) -> TransferResult<Vec<u8>>

Deterministic descriptor serialization, bounded by the validated hash inventory.

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pub fn object_hash(&self) -> &str

Full object SHA-256 identity.

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pub fn total_bytes(&self) -> u64

Exact complete object bytes.

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pub fn block_bytes(&self) -> u32

Maximum block length; the last block may be shorter.

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pub fn block_count(&self) -> usize

Number of complete/incomplete blocks.

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pub fn block_len(&self, index: usize) -> TransferResult<usize>

Exact length for a valid block index.

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pub fn block_offset(&self, index: usize) -> TransferResult<u64>

Offset for a validated block index.

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pub fn verify_block(&self, index: usize, bytes: &[u8]) -> TransferResult<()>

Verifies length and digest against the trusted inventory.

Trait Implementations§

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impl Clone for ObjectDescriptor

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fn clone(&self) -> Self

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 Debug for ObjectDescriptor

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

Formats the value using the given formatter. Read more
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impl<'de> Deserialize<'de> for ObjectDescriptor

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl Eq for ObjectDescriptor

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impl PartialEq for ObjectDescriptor

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fn eq(&self, other: &Self) -> bool

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=. Read more
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impl Serialize for ObjectDescriptor

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl StructuralPartialEq for ObjectDescriptor

Auto Trait Implementations§

Blanket Implementations§

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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> DeserializeOwned for T
where T: for<'de> Deserialize<'de>,

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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> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = !

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, !>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.