feat(contracts): implement Soroban asset registry with ownership tracking and admin controls

contracts/assetsup/src/asset.rs

@@ -1,29 +1,39 @@
-use soroban_sdk::{Address, BytesN, String, contracttype};
+use soroban_sdk::{Address, BytesN, String, Vec, contracttype};
 
-use crate::types::{AssetStatus, AssetType};
+use crate::types::{AssetStatus, CustomAttribute};
 
 #[contracttype]
 #[derive(Clone, Debug, Eq, PartialEq)]
 pub enum DataKey {
     Asset(BytesN<32>),
+    OwnerRegistry(Address),
+    AssetCounter,
 }
 
 #[contracttype]
 #[derive(Clone, Debug, Eq, PartialEq)]
 pub struct Asset {
     pub id: BytesN<32>,
     pub name: String,
-    pub asset_type: AssetType,
+    pub description: String,
     pub category: String,
-    pub branch_id: BytesN<32>,
-    pub department_id: u64,
+    pub owner: Address,
+    pub registration_timestamp: u64,
+    pub last_transfer_timestamp: u64,
     pub status: AssetStatus,
-    pub purchase_date: u64,
-    pub purchase_cost: i128,
-    pub current_value: i128,
-    pub warranty_expiry: u64,
-    pub stellar_token_id: BytesN<32>,
+    pub metadata_uri: String,
+    pub purchase_value: i128,
+    pub custom_attributes: Vec<CustomAttribute>,
+}
+
+#[contracttype]
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct AssetInfo {
+    pub id: BytesN<32>,
+    pub name: String,
+    pub category: String,
     pub owner: Address,
+    pub status: AssetStatus,
 }
 
 // Note: Contract methods implemented in lib.rs

contracts/assetsup/src/error.rs

@@ -6,20 +6,19 @@ use soroban_sdk::{Env, contracterror, panic_with_error};
 pub enum Error {
     AlreadyInitialized = 1,
     AdminNotFound = 2,
-    // Asset exist
     AssetAlreadyExists = 3,
-    //Asset not found
     AssetNotFound = 4,
-    // Branch already exists
     BranchAlreadyExists = 5,
-    // Branch not found
     BranchNotFound = 6,
-    // Subscription already exist
     SubscriptionAlreadyExists = 7,
-    // User not authorized
     Unauthorized = 8,
-    // Payment is not valid
     InvalidPayment = 9,
+    ContractPaused = 10,
+    ContractNotInitialized = 11,
+    InvalidAssetName = 12,
+    InvalidPurchaseValue = 13,
+    InvalidMetadataUri = 14,
+    InvalidOwnerAddress = 15,
 }
 
 pub fn handle_error(env: &Env, error: Error) -> ! {