Struct DriveDocumentQuery

pub struct DriveDocumentQuery<'a> {
    pub contract: &'a DataContract,
    pub document_type: DocumentTypeRef<'a>,
    pub internal_clauses: InternalClauses,
    pub offset: Option<u16>,
    pub limit: Option<u16>,
    pub order_by: IndexMap<String, OrderClause>,
    pub start_at: Option<[u8; 32]>,
    pub start_at_included: bool,
    pub block_time_ms: Option<u64>,
}

Drive query struct

Fields

contract: &'a DataContract

DataContract

document_type: DocumentTypeRef<'a>

Document type

internal_clauses: InternalClauses

Internal clauses

offset: Option<u16>

Offset

limit: Option<u16>

Limit

order_by: IndexMap<String, OrderClause>

Order by

start_at: Option<[u8; 32]>

Start at document id

start_at_included: bool

Start at included

block_time_ms: Option<u64>

Block time

Implementations

impl<'a> DriveDocumentQuery<'a>

pub fn new_primary_key_single_item_query( contract: &'a DataContract, document_type: DocumentTypeRef<'a>, id: Identifier, ) -> DriveDocumentQuery<'a>

Gets a document by their primary key

pub fn is_for_primary_key(&self) -> bool

Returns true if the query clause if for primary keys.

pub fn from_value( query_value: Value, contract: &'a DataContract, document_type: DocumentTypeRef<'a>, config: &DriveConfig, ) -> Result<DriveDocumentQuery<'a>, Error>

Converts a query Value to a DriveQuery.

pub fn from_btree_map_value( query_document: BTreeMap<String, Value>, contract: &'a DataContract, document_type: DocumentTypeRef<'a>, config: &DriveConfig, ) -> Result<DriveDocumentQuery<'a>, Error>

Converts a query Value to a DriveQuery.

pub fn from_decomposed_values( where_clause: Value, order_by: Option<Value>, maybe_limit: Option<u16>, start_at: Option<[u8; 32]>, start_at_included: bool, block_time_ms: Option<u64>, contract: &'a DataContract, document_type: DocumentTypeRef<'a>, config: &DriveConfig, ) -> Result<DriveDocumentQuery<'a>, Error>

Converts a query Value to a DriveQuery.

pub fn from_sql_expr( sql_string: &str, contract: &'a DataContract, config: Option<&DriveConfig>, ) -> Result<DriveDocumentQuery<'a>, Error>

Converts a SQL expression to a DriveQuery.

pub fn start_at_document_path_and_key( &self, starts_at: &[u8; 32], ) -> (Vec<Vec<u8>>, Vec<u8>)

Operations to construct a path query.

pub fn construct_path_query( &self, starts_at_document: Option<Document>, platform_version: &PlatformVersion, ) -> Result<PathQuery, Error>

Operations to construct a path query.

pub fn get_primary_key_path_query( &self, document_type_path: Vec<Vec<u8>>, starts_at_document: Option<(Document, bool)>, platform_version: &PlatformVersion, ) -> Result<PathQuery, Error>

Returns a path query given a document type path and starting document.

pub fn find_best_index( &self, platform_version: &PlatformVersion, ) -> Result<&Index, Error>

Finds the best index for the query.

pub fn query_item_for_starts_at_key( starts_at_key: Vec<u8>, left_to_right: bool, ) -> QueryItem

Returns a QueryItem given a start key and query direction.

pub fn get_non_primary_key_path_query( &self, document_type_path: Vec<Vec<u8>>, starts_at_document: Option<(Document, bool)>, platform_version: &PlatformVersion, ) -> Result<PathQuery, Error>

Returns a path query for non-primary keys given a document type path and starting document.

impl<'a> DriveDocumentQuery<'a>

pub fn verify_proof( &self, proof: &[u8], platform_version: &PlatformVersion, ) -> Result<([u8; 32], Vec<Document>), Error>

Verifies a proof for a collection of documents.

This function takes a byte slice representing the serialized proof, verifies it, and returns a tuple consisting of the root hash and a vector of deserialized documents.

Arguments

• proof - A byte slice representing the proof to be verified.
• platform_version - The platform version against which to verify the proof.

Returns

A Result containing:

• A tuple with the root hash and a vector of deserialized Documents if the proof is valid.
• An Error variant, in case the proof verification fails or a deserialization error occurs.

Errors

This function will return an Error variant if:

1. The proof verification fails.
2. A deserialization error occurs when parsing the serialized document(s).

impl<'a> DriveDocumentQuery<'a>

pub fn verify_proof_keep_serialized( &self, proof: &[u8], platform_version: &PlatformVersion, ) -> Result<([u8; 32], Vec<Vec<u8>>), Error>

Verifies the given proof and returns the root hash of the GroveDB tree and a vector of serialized documents if the verification is successful.

Arguments

• proof - A byte slice representing the proof to be verified.
• platform_version - The platform version against which to verify the proof.

Returns

• On success, returns a tuple containing the root hash of the GroveDB tree and a vector of serialized documents.
• On failure, returns an Error.

Errors

This function will return an Error if:

1. The start at document is not present in proof and it is expected to be.
2. The path query fails to verify against the given proof.
3. Converting the element into bytes fails.

impl<'a> DriveDocumentQuery<'a>

pub fn verify_start_at_document_in_proof( &self, proof: &[u8], is_proof_subset: bool, document_id: [u8; 32], platform_version: &PlatformVersion, ) -> Result<([u8; 32], Option<Document>), Error>

Verifies if a document exists at the beginning of a proof, and returns the root hash and the optionally found document.

Arguments

• proof - A byte slice containing the proof data.
• is_proof_subset - A boolean indicating whether the proof is a subset query or not.
• document_id - A byte_32 array, representing the ID of the document to start at.
• platform_version - The platform version against which to verify the proof.

Returns

A Result with a tuple containing:

• The root hash of the verified proof.
• An Option<Document> containing the found document if available.

Errors

This function returns an Error in the following cases:

• If the proof is corrupted (wrong path, wrong key, etc.).
• If the provided proof has an incorrect number of elements.

Trait Implementations

impl<'a> Clone for DriveDocumentQuery<'a>

fn clone(&self) -> DriveDocumentQuery<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for DriveDocumentQuery<'a>

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

Formats the value using the given formatter.

impl<'a> From<&'a DriveDocumentQuery<'a>> for DocumentQuery

fn from(value: &'a DriveDocumentQuery<'a>) -> Self

Converts to this type from the input type.

impl<'a> From<DriveDocumentQuery<'a>> for DocumentQuery

fn from(value: DriveDocumentQuery<'a>) -> Self

Converts to this type from the input type.

impl<'a> PartialEq for DriveDocumentQuery<'a>

fn eq(&self, other: &DriveDocumentQuery<'a>) -> bool

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'a> Query<DocumentQuery> for DriveDocumentQuery<'a>

fn query(self, prove: bool) -> Result<DocumentQuery, Error>

Converts the current instance into an instance of the TransportRequest type.

impl<'a> TryFrom<&'a DocumentQuery> for DriveDocumentQuery<'a>

type Error = Error

The type returned in the event of a conversion error.

fn try_from(request: &'a DocumentQuery) -> Result<Self, Self::Error>

Performs the conversion.

impl<'a> StructuralPartialEq for DriveDocumentQuery<'a>