feat: sdk to return proofs if requested

packages/rs-sdk/Cargo.toml

@@ -26,7 +26,7 @@ serde = { version = "1.0.197", default-features = false, features = [
 ], optional = true }
 serde_json = { version = "1.0", features = ["preserve_order"], optional = true }
 tracing = { version = "0.1.40" }
-hex = { version = "0.4.3", optional = true }
+hex = { version = "0.4.3"}
 dotenvy = { version = "0.15.7", optional = true }
 envy = { version = "0.4.2", optional = true }
 futures = { version = "0.3.30" }
@@ -66,7 +66,6 @@ mocks = [
   "dpp/random-identities",
   "drive/serde",
   "drive-proof-verifier/mocks",
-  "dep:hex",
   "dep:dotenvy",
   "dep:envy",
   "dep:lru",

packages/rs-sdk/README.md

@@ -38,7 +38,7 @@ In order to build application that uses Dash Platform SDK, you need to:
 
 Dash Platform SDK supports mocking with `mocks` feature which provides a
 convenient way to define mock expectations and use the SDK without actual
-connection to the Platform.
+connection to Platform.
 
 You can see examples of mocking in [mock_fetch.rs](tests/fetch/mock_fetch.rs) and  [mock_fetch_many.rs](tests/fetch/mock_fetch_many.rs).
 

packages/rs-sdk/examples/read_contract.rs

@@ -48,7 +48,7 @@ async fn main() {
     // Convert bytes to identifier object that can be used as a Query
     let id = Identifier::from_bytes(&DATA_CONTRACT_ID_BYTES).expect("parse data contract id");
 
-    // Fetch identity from the Platform
+    // Fetch identity from Platform
     let contract: Option<DataContract> =
         DataContract::fetch(&sdk, id).await.expect("fetch identity");
 

packages/rs-sdk/src/error.rs

@@ -47,7 +47,7 @@ pub enum Error {
     #[error("Required {0} not found: {1}")]
     MissingDependency(String, String),
     /// Epoch not found; we must have at least one epoch
-    #[error("No epoch found on the Platform; it should never happen")]
+    #[error("No epoch found on Platform; it should never happen")]
     EpochNotFound,
     /// SDK operation timeout reached error
     #[error("SDK operation timeout {} secs reached: {1}", .0.as_secs())]

packages/rs-sdk/src/mock/provider.rs

@@ -1,4 +1,4 @@
-//! Example ContextProvider that uses the Core gRPC API to fetch data from the platform.
+//! Example ContextProvider that uses the Core gRPC API to fetch data from Platform.
 
 use crate::core_client::CoreClient;
 use crate::platform::Fetch;
@@ -12,7 +12,7 @@ use std::hash::Hash;
 use std::num::NonZeroUsize;
 use std::sync::Arc;
 
-/// Context provider that uses the Core gRPC API to fetch data from the platform.
+/// Context provider that uses the Core gRPC API to fetch data from Platform.
 ///
 /// Example [ContextProvider] used by the Sdk for testing purposes.
 pub struct GrpcContextProvider {
@@ -40,7 +40,7 @@ pub struct GrpcContextProvider {
 
     /// Directory where to store dumped data.
     ///
-    /// This is used to store data that is fetched from the platform and can be used for testing purposes.
+    /// This is used to store data that is fetched from Platform and can be used for testing purposes.
     #[cfg(feature = "mocks")]
     pub dump_dir: Option<std::path::PathBuf>,
 }
@@ -83,7 +83,7 @@ impl GrpcContextProvider {
     }
     /// Set the directory where to store dumped data.
     ///
-    /// When set, the context provider will store data fetched from the platform into this directory.
+    /// When set, the context provider will store data fetched from Platform into this directory.
     #[cfg(feature = "mocks")]
     pub fn set_dump_dir(&mut self, dump_dir: Option<std::path::PathBuf>) {
         self.dump_dir = dump_dir;
@@ -216,7 +216,7 @@ impl ContextProvider for GrpcContextProvider {
 
 /// Thread-safe cache of various objects inside the SDK.
 ///
-/// This is used to cache objects that are expensive to fetch from the platform, like data contracts.
+/// This is used to cache objects that are expensive to fetch from Platform, like data contracts.
 pub struct Cache<K: Hash + Eq, V> {
     // We use a Mutex to allow access to the cache when we don't have mutable &self
     // And we use Arc to allow multiple threads to access the cache without having to clone it

packages/rs-sdk/src/mock/sdk.rs

@@ -1,7 +1,7 @@
 //! Mocking mechanisms for Dash Platform SDK.
 //!
 //! See [MockDashPlatformSdk] for more details.
-use dapi_grpc::platform::v0::ResponseMetadata;
+use dapi_grpc::platform::v0::{Proof, ResponseMetadata};
 use dapi_grpc::{
     mock::Mockable,
     platform::v0::{self as proto},
@@ -219,11 +219,11 @@ impl MockDashPlatformSdk {
     /// ## Generic Parameters
     ///
     /// - `O`: Type of the object that will be returned in response to the query. Must implement [Fetch] and [MockResponse].
-    /// - `Q`: Type of the query that will be sent to the platform. Must implement [Query] and [Mockable].
+    /// - `Q`: Type of the query that will be sent to Platform. Must implement [Query] and [Mockable].
     ///
     /// ## Arguments
     ///
-    /// - `query`: Query that will be sent to the platform.
+    /// - `query`: Query that will be sent to Platform.
     /// - `object`: Object that will be returned in response to `query`, or None if the object is expected to not exist.
     ///
     /// ## Returns
@@ -284,11 +284,11 @@ impl MockDashPlatformSdk {
     ///
     /// - `O`: Type of the object that will be returned in response to the query.
     /// Must implement [FetchMany]. `Vec<O>` must implement [MockResponse].
-    /// - `Q`: Type of the query that will be sent to the platform. Must implement [Query] and [Mockable].
+    /// - `Q`: Type of the query that will be sent to Platform. Must implement [Query] and [Mockable].
     ///
     /// ## Arguments
     ///
-    /// - `query`: Query that will be sent to the platform.
+    /// - `query`: Query that will be sent to Platform.
     /// - `objects`: Vector of objects that will be returned in response to `query`, or None if no objects are expected.
     ///
     /// ## Returns
@@ -369,7 +369,7 @@ impl MockDashPlatformSdk {
         &self,
         request: O::Request,
         response: O::Response,
-    ) -> Result<(Option<O>, ResponseMetadata), drive_proof_verifier::Error>
+    ) -> Result<(Option<O>, ResponseMetadata, Proof), drive_proof_verifier::Error>
     where
         O::Request: Mockable,
         Option<O>: MockResponse,
@@ -381,6 +381,7 @@ impl MockDashPlatformSdk {
             Some(d) => (
                 Option::<O>::mock_deserialize(self, d),
                 ResponseMetadata::default(),
+                Proof::default(),
             ),
             None => {
                 let version = self.version();

packages/rs-sdk/src/platform/block_info_from_metadata.rs

@@ -24,7 +24,7 @@ use drive::error::proof::ProofError;
 ///
 /// # Errors
 /// Returns an error if:
-/// - The `epoch` value in the response metadata exceeds the maximum value that can be represented by a 16-bit integer. This is considered a data validity error as it indicates the platform returned an unexpectedly high epoch number.
+/// - The `epoch` value in the response metadata exceeds the maximum value that can be represented by a 16-bit integer. This is considered a data validity error as it indicates Platform returned an unexpectedly high epoch number.
 ///
 /// The function encapsulates errors into the application's own `Error` type, providing a unified interface for error handling across the application.
 pub fn block_info_from_metadata(response_metadata: &ResponseMetadata) -> Result<BlockInfo, Error> {

packages/rs-sdk/src/platform/delegate.rs

@@ -83,7 +83,7 @@ macro_rules! delegate_from_proof_variant {
                 response: O,
                 version: &dpp::version::PlatformVersion,
                 provider: &'a dyn drive_proof_verifier::ContextProvider,
-            ) -> Result<(Option<Self>, ResponseMetadata), drive_proof_verifier::Error>
+            ) -> Result<(Option<Self>, ResponseMetadata, dapi_grpc::platform::v0::Proof), drive_proof_verifier::Error>
             where
                 Self: Sized + 'a,
             {

packages/rs-sdk/src/platform/document_query.rs

@@ -8,7 +8,7 @@ use dapi_grpc::platform::v0::get_documents_request::Version::V0;
 use dapi_grpc::platform::v0::{
     self as platform_proto,
     get_documents_request::{get_documents_request_v0::Start, GetDocumentsRequestV0},
-    GetDocumentsRequest, ResponseMetadata,
+    GetDocumentsRequest, Proof, ResponseMetadata,
 };
 use dpp::{
     data_contract::{
@@ -162,21 +162,25 @@ impl FromProof<DocumentQuery> for Document {
         response: O,
         version: &dpp::version::PlatformVersion,
         provider: &'a dyn drive_proof_verifier::ContextProvider,
-    ) -> Result<(Option<Self>, ResponseMetadata), drive_proof_verifier::Error>
+    ) -> Result<(Option<Self>, ResponseMetadata, Proof), drive_proof_verifier::Error>
     where
         Self: Sized + 'a,
     {
         let request: Self::Request = request.into();
 
-        let (documents, metadata): (Option<Documents>, ResponseMetadata) =
+        let (documents, metadata, proof): (Option<Documents>, ResponseMetadata, Proof) =
             <Documents as FromProof<Self::Request>>::maybe_from_proof_with_metadata(
                 request, response, version, provider,
             )?;
 
         match documents {
-            None => Ok((None, metadata)),
+            None => Ok((None, metadata, proof)),
             Some(docs) => match docs.len() {
-                0 | 1 => Ok((docs.into_iter().next().and_then(|(_, v)| v), metadata)),
+                0 | 1 => Ok((
+                    docs.into_iter().next().and_then(|(_, v)| v),
+                    metadata,
+                    proof,
+                )),
                 n => Err(drive_proof_verifier::Error::ResponseDecodeError {
                     error: format!("expected 1 element, got {}", n),
                 }),
@@ -193,7 +197,7 @@ impl FromProof<DocumentQuery> for drive_proof_verifier::types::Documents {
         response: O,
         version: &dpp::version::PlatformVersion,
         provider: &'a dyn drive_proof_verifier::ContextProvider,
-    ) -> Result<(Option<Self>, ResponseMetadata), drive_proof_verifier::Error>
+    ) -> Result<(Option<Self>, ResponseMetadata, Proof), drive_proof_verifier::Error>
     where
         Self: Sized + 'a,
     {

packages/rs-sdk/src/platform/fetch.rs

@@ -4,13 +4,13 @@
 //! It allows fetching of various types of data such as `Identity`, `DataContract`, and `Document`.
 //!
 //! ## Traits
-//! - [Fetch]: An asynchronous trait that defines how to fetch data from the platform.
+//! - [Fetch]: An asynchronous trait that defines how to fetch data from Platform.
 //!   It requires the implementing type to also implement [Debug] and [FromProof]
 //!   traits. The associated [Fetch::Request]` type needs to implement [TransportRequest].
 
 use crate::mock::MockResponse;
 use crate::{error::Error, platform::query::Query, Sdk};
-use dapi_grpc::platform::v0::{self as platform_proto, ResponseMetadata};
+use dapi_grpc::platform::v0::{self as platform_proto, Proof, ResponseMetadata};
 use dpp::voting::votes::Vote;
 use dpp::{
     block::extended_epoch_info::ExtendedEpochInfo, document::Document, platform_value::Identifier,
@@ -23,9 +23,9 @@ use std::fmt::Debug;
 use super::types::identity::IdentityRequest;
 use super::DocumentQuery;
 
-/// Trait implemented by objects that can be fetched from the platform.
+/// Trait implemented by objects that can be fetched from Platform.
 ///
-/// To fetch an object from the platform, you need to define some query (criteria that fetched object must match) and
+/// To fetch an object from Platform, you need to define some query (criteria that fetched object must match) and
 /// use [Fetch::fetch()] for your object type.
 ///
 /// Implementators of this trait should implement at least the [fetch_with_metadata()](Fetch::fetch_with_metadata)
@@ -59,16 +59,16 @@ where
             Response = <<Self as Fetch>::Request as DapiRequest>::Response,
         >,
 {
-    /// Type of request used to fetch data from the platform.
+    /// Type of request used to fetch data from Platform.
     ///
     /// Most likely, one of the types defined in [`dapi_grpc::platform::v0`].
     ///
     /// This type must implement [`TransportRequest`] and [`MockRequest`].
     type Request: TransportRequest + Into<<Self as FromProof<<Self as Fetch>::Request>>::Request>;
 
-    /// Fetch single object from the Platfom.
+    /// Fetch single object from Platform.
     ///
-    /// Fetch object from the platform that satisfies provided [Query].
+    /// Fetch object from Platform that satisfies provided [Query].
     /// Most often, the Query is an [Identifier] of the object to be fetched.
     ///
     /// ## Parameters
@@ -93,15 +93,16 @@ where
         Self::fetch_with_settings(sdk, query, RequestSettings::default()).await
     }
 
-    /// Fetch single object from the Platfom.
+    /// Fetch single object from Platform with metadata.
     ///
-    /// Fetch object from the platform that satisfies provided [Query].
+    /// Fetch object from Platform that satisfies provided [Query].
     /// Most often, the Query is an [Identifier] of the object to be fetched.
     ///
     /// ## Parameters
     ///
     /// - `sdk`: An instance of [Sdk].
     /// - `query`: A query parameter implementing [`crate::platform::query::Query`] to specify the data to be fetched.
+    /// - `settings`: An optional `RequestSettings` to give greater flexibility on the request.
     ///
     /// ## Returns
     ///
@@ -137,9 +138,58 @@ where
         }
     }
 
-    /// Fetch single object from the Platfom.
+    /// Fetch single object from Platform with metadata and underlying proof.
     ///
-    /// Fetch object from the platform that satisfies provided [Query].
+    /// Fetch object from Platform that satisfies provided [Query].
+    /// Most often, the Query is an [Identifier] of the object to be fetched.
+    ///
+    /// This method is meant to give the user library a way to see the underlying proof
+    /// for educational purposes. This method should most likely only be used for debugging.
+    ///
+    /// ## Parameters
+    ///
+    /// - `sdk`: An instance of [Sdk].
+    /// - `query`: A query parameter implementing [`crate::platform::query::Query`] to specify the data to be fetched.
+    /// - `settings`: An optional `RequestSettings` to give greater flexibility on the request.
+    ///
+    /// ## Returns
+    ///
+    /// Returns:
+    /// * `Ok(Some(Self))` when object is found
+    /// * `Ok(None)` when object is not found
+    /// * [`Err(Error)`](Error) when an error occurs
+    ///
+    /// ## Error Handling
+    ///
+    /// Any errors encountered during the execution are returned as [Error] instances.
+    async fn fetch_with_metadata_and_proof<Q: Query<<Self as Fetch>::Request>>(
+        sdk: &Sdk,
+        query: Q,
+        settings: Option<RequestSettings>,
+    ) -> Result<(Option<Self>, ResponseMetadata, Proof), Error> {
+        let request = query.query(sdk.prove())?;
+
+        let response = request
+            .clone()
+            .execute(sdk, settings.unwrap_or_default())
+            .await?;
+
+        let object_type = std::any::type_name::<Self>().to_string();
+        tracing::trace!(request = ?request, response = ?response, object_type, "fetched object from platform");
+
+        let (object, response_metadata, proof): (Option<Self>, ResponseMetadata, Proof) = sdk
+            .parse_proof_with_metadata_and_proof(request, response)
+            .await?;
+
+        match object {
+            Some(item) => Ok((item.into(), response_metadata, proof)),
+            None => Ok((None, response_metadata, proof)),
+        }
+    }
+
+    /// Fetch single object from Platform.
+    ///
+    /// Fetch object from Platform that satisfies provided [Query].
     /// Most often, the Query is an [Identifier] of the object to be fetched.
     ///
     /// ## Parameters
@@ -167,7 +217,7 @@ where
         Ok(object)
     }
 
-    /// Fetch single object from the Platform by identifier.
+    /// Fetch single object from Platform by identifier.
     ///
     /// Convenience method that allows fetching objects by identifier for types that implement [Query] for [Identifier].
     ///