feat(sdk): added transfer transition to rs-sdk

packages/rs-dpp/src/state_transition/state_transitions/identity/identity_credit_transfer_transition/methods/mod.rs

@@ -1,7 +1,57 @@
 mod v0;
-
 pub use v0::*;
 
 use crate::state_transition::identity_credit_transfer_transition::IdentityCreditTransferTransition;
+#[cfg(feature = "state-transition-signing")]
+use crate::{
+    identity::{signer::Signer, Identity, IdentityPublicKey},
+    prelude::{IdentityNonce, UserFeeIncrease},
+    state_transition::{
+        identity_credit_transfer_transition::v0::IdentityCreditTransferTransitionV0,
+        StateTransition,
+    },
+    ProtocolError,
+};
+#[cfg(feature = "state-transition-signing")]
+use platform_value::Identifier;
+#[cfg(feature = "state-transition-signing")]
+use platform_version::version::{FeatureVersion, PlatformVersion};
 
-impl IdentityCreditTransferTransitionMethodsV0 for IdentityCreditTransferTransition {}
+impl IdentityCreditTransferTransitionMethodsV0 for IdentityCreditTransferTransition {
+    #[cfg(feature = "state-transition-signing")]
+    fn try_from_identity<S: Signer>(
+        identity: &Identity,
+        to_identity_with_identifier: Identifier,
+        amount: u64,
+        user_fee_increase: UserFeeIncrease,
+        signer: S,
+        signing_withdrawal_key_to_use: Option<&IdentityPublicKey>,
+        nonce: IdentityNonce,
+        platform_version: &PlatformVersion,
+        version: Option<FeatureVersion>,
+    ) -> Result<StateTransition, ProtocolError> {
+        match version.unwrap_or(
+            platform_version
+                .dpp
+                .state_transition_conversion_versions
+                .identity_to_identity_transfer_transition,
+        ) {
+            0 => Ok(IdentityCreditTransferTransitionV0::try_from_identity(
+                identity,
+                to_identity_with_identifier,
+                amount,
+                user_fee_increase,
+                signer,
+                signing_withdrawal_key_to_use,
+                nonce,
+                platform_version,
+                version,
+            )?),
+            version => Err(ProtocolError::UnknownVersionMismatch {
+                method: "IdentityCreditTransferTransition::try_from_identity".to_string(),
+                known_versions: vec![0],
+                received: version,
+            }),
+        }
+    }
+}

packages/rs-dpp/src/state_transition/state_transitions/identity/identity_credit_transfer_transition/methods/v0/mod.rs

@@ -1,6 +1,30 @@
+#[cfg(feature = "state-transition-signing")]
+use crate::{
+    identity::{signer::Signer, Identity, IdentityPublicKey},
+    prelude::{IdentityNonce, UserFeeIncrease},
+    state_transition::StateTransition,
+    ProtocolError,
+};
+use platform_value::Identifier;
+#[cfg(feature = "state-transition-signing")]
+use platform_version::version::{FeatureVersion, PlatformVersion};
+
 use crate::state_transition::StateTransitionType;
 
 pub trait IdentityCreditTransferTransitionMethodsV0 {
+    #[cfg(feature = "state-transition-signing")]
+    fn try_from_identity<S: Signer>(
+        identity: &Identity,
+        to_identity_with_identifier: Identifier,
+        amount: u64,
+        user_fee_increase: UserFeeIncrease,
+        signer: S,
+        signing_withdrawal_key_to_use: Option<&IdentityPublicKey>,
+        nonce: IdentityNonce,
+        platform_version: &PlatformVersion,
+        version: Option<FeatureVersion>,
+    ) -> Result<StateTransition, ProtocolError>;
+
     /// Get State Transition Type
     fn get_type() -> StateTransitionType {
         StateTransitionType::IdentityCreditTransfer

packages/rs-dpp/src/state_transition/state_transitions/identity/identity_credit_transfer_transition/v0/v0_methods.rs

@@ -1,4 +1,80 @@
+#[cfg(feature = "state-transition-signing")]
+use crate::{
+    identity::{
+        accessors::IdentityGettersV0, signer::Signer, Identity, IdentityPublicKey, KeyType,
+        Purpose, SecurityLevel,
+    },
+    prelude::{IdentityNonce, UserFeeIncrease},
+    state_transition::StateTransition,
+    ProtocolError,
+};
+use platform_value::Identifier;
+
 use crate::state_transition::identity_credit_transfer_transition::methods::IdentityCreditTransferTransitionMethodsV0;
 use crate::state_transition::identity_credit_transfer_transition::v0::IdentityCreditTransferTransitionV0;
+use crate::state_transition::GetDataContractSecurityLevelRequirementFn;
+#[cfg(feature = "state-transition-signing")]
+use platform_version::version::{FeatureVersion, PlatformVersion};
+
+impl IdentityCreditTransferTransitionMethodsV0 for IdentityCreditTransferTransitionV0 {
+    #[cfg(feature = "state-transition-signing")]
+    fn try_from_identity<S: Signer>(
+        identity: &Identity,
+        to_identity_with_identifier: Identifier,
+        amount: u64,
+        user_fee_increase: UserFeeIncrease,
+        signer: S,
+        signing_withdrawal_key_to_use: Option<&IdentityPublicKey>,
+        nonce: IdentityNonce,
+        _platform_version: &PlatformVersion,
+        _version: Option<FeatureVersion>,
+    ) -> Result<StateTransition, ProtocolError> {
+        let mut transition: StateTransition = IdentityCreditTransferTransitionV0 {
+            identity_id: identity.id(),
+            recipient_id: to_identity_with_identifier,
+            amount,
+            nonce,
+            user_fee_increase,
+            signature_public_key_id: 0,
+            signature: Default::default(),
+        }
+        .into();
+
+        let identity_public_key = match signing_withdrawal_key_to_use {
+            Some(key) => {
+                if signer.can_sign_with(key) {
+                    key
+                } else {
+                    return Err(
+                        ProtocolError::DesiredKeyWithTypePurposeSecurityLevelMissing(
+                            "specified transfer public key cannot be used for signing".to_string(),
+                        ),
+                    );
+                }
+            }
+            None => {
+                let key = identity
+                    .get_first_public_key_matching(
+                        Purpose::TRANSFER,
+                        SecurityLevel::full_range().into(),
+                        KeyType::all_key_types().into(),
+                        true,
+                    )
+                    .ok_or_else(|| {
+                        ProtocolError::DesiredKeyWithTypePurposeSecurityLevelMissing(
+                            "no transfer public key".to_string(),
+                        )
+                    })?;
+                key
+            }
+        };
+
+        transition.sign_external(
+            identity_public_key,
+            &signer,
+            None::<GetDataContractSecurityLevelRequirementFn>,
+        )?;
 
-impl IdentityCreditTransferTransitionMethodsV0 for IdentityCreditTransferTransitionV0 {}
+        Ok(transition)
+    }
+}

packages/rs-platform-version/src/version/dpp_versions/dpp_state_transition_conversion_versions/mod.rs

@@ -7,6 +7,7 @@ pub mod v2;
 pub struct DPPStateTransitionConversionVersions {
     pub identity_to_identity_create_transition: FeatureVersion,
     pub identity_to_identity_top_up_transition: FeatureVersion,
+    pub identity_to_identity_transfer_transition: FeatureVersion,
     pub identity_to_identity_withdrawal_transition: FeatureVersion,
     pub identity_to_identity_create_transition_with_signer: FeatureVersion,
 }

packages/rs-platform-version/src/version/dpp_versions/dpp_state_transition_conversion_versions/v1.rs

@@ -4,6 +4,7 @@ pub const STATE_TRANSITION_CONVERSION_VERSIONS_V1: DPPStateTransitionConversionV
     DPPStateTransitionConversionVersions {
         identity_to_identity_create_transition: 0,
         identity_to_identity_top_up_transition: 0,
+        identity_to_identity_transfer_transition: 0,
         identity_to_identity_withdrawal_transition: 0,
         identity_to_identity_create_transition_with_signer: 0,
     };

packages/rs-platform-version/src/version/dpp_versions/dpp_state_transition_conversion_versions/v2.rs

@@ -4,6 +4,7 @@ pub const STATE_TRANSITION_CONVERSION_VERSIONS_V2: DPPStateTransitionConversionV
     DPPStateTransitionConversionVersions {
         identity_to_identity_create_transition: 0,
         identity_to_identity_top_up_transition: 0,
+        identity_to_identity_transfer_transition: 0,
         identity_to_identity_withdrawal_transition: 1,
         identity_to_identity_create_transition_with_signer: 0,
     };

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

@@ -9,6 +9,7 @@ pub mod put_document;
 pub mod put_identity;
 pub mod put_settings;
 pub mod top_up_identity;
+pub mod transfer;
 pub mod transfer_document;
 mod txid;
 pub mod update_price_of_document;

packages/rs-sdk/src/platform/transition/transfer.rs

@@ -0,0 +1,67 @@
+use dpp::identifier::Identifier;
+use dpp::identity::accessors::IdentityGettersV0;
+
+use crate::platform::transition::broadcast::BroadcastStateTransition;
+use crate::platform::transition::put_settings::PutSettings;
+use crate::{Error, Sdk};
+use dpp::identity::signer::Signer;
+use dpp::identity::{Identity, IdentityPublicKey};
+use dpp::state_transition::identity_credit_transfer_transition::methods::IdentityCreditTransferTransitionMethodsV0;
+use dpp::state_transition::identity_credit_transfer_transition::IdentityCreditTransferTransition;
+use dpp::state_transition::proof_result::StateTransitionProofResult;
+
+#[async_trait::async_trait]
+pub trait TransferToIdentity {
+    /// Function to transfer credits from an identity to another identity. Returns the final
+    /// identity balance.
+    ///
+    /// If signing_transfer_key_to_use is not set, we will try to use one in the signer that is
+    /// available for the transfer.
+    async fn transfer_credits<S: Signer + Send>(
+        &self,
+        sdk: &Sdk,
+        to_identity_id: Identifier,
+        amount: u64,
+        signing_transfer_key_to_use: Option<&IdentityPublicKey>,
+        signer: S,
+        settings: Option<PutSettings>,
+    ) -> Result<u64, Error>;
+}
+
+#[async_trait::async_trait]
+impl TransferToIdentity for Identity {
+    async fn transfer_credits<S: Signer + Send>(
+        &self,
+        sdk: &Sdk,
+        to_identity_id: Identifier,
+        amount: u64,
+        signing_transfer_key_to_use: Option<&IdentityPublicKey>,
+        signer: S,
+        settings: Option<PutSettings>,
+    ) -> Result<u64, Error> {
+        let new_identity_nonce = sdk.get_identity_nonce(self.id(), true, settings).await?;
+        let user_fee_increase = settings.and_then(|settings| settings.user_fee_increase);
+        let state_transition = IdentityCreditTransferTransition::try_from_identity(
+            self,
+            to_identity_id,
+            amount,
+            user_fee_increase.unwrap_or_default(),
+            signer,
+            signing_transfer_key_to_use,
+            new_identity_nonce,
+            sdk.version(),
+            None,
+        )?;
+
+        let result = state_transition.broadcast_and_wait(sdk, None).await?;
+
+        match result {
+            StateTransitionProofResult::VerifiedPartialIdentity(identity) => {
+                identity.balance.ok_or(Error::DapiClientError(
+                    "expected an identity balance after transfer".to_string(),
+                ))
+            }
+            _ => Err(Error::DapiClientError("proved a non identity".to_string())),
+        }
+    }
+}