AssetBridge: Bitcoin L2-Native Asset Tokenization Protocol

Clarinet.toml

@@ -1,21 +1,19 @@
 [project]
-name = "AssetBridge"
-description = ""
+name = 'AssetBridge'
+description = ''
 authors = []
 telemetry = true
-cache_dir = "./.cache"
-
-# [contracts.counter]
-# path = "contracts/counter.clar"
-
+cache_dir = './.cache'
+requirements = []
+[contracts.asset-tokenization]
+path = 'contracts/asset-tokenization.clar'
+clarity_version = 3
+epoch = 3.1
 [repl.analysis]
-passes = ["check_checker"]
-check_checker = { trusted_sender = false, trusted_caller = false, callee_filter = false }
+passes = ['check_checker']
 
-# Check-checker settings:
-# trusted_sender: if true, inputs are trusted after tx_sender has been checked.
-# trusted_caller: if true, inputs are trusted after contract-caller has been checked.
-# callee_filter: if true, untrusted data may be passed into a private function without a
-# warning, if it gets checked inside. This check will also propagate up to the
-# caller.
-# More informations: https://www.hiro.so/blog/new-safety-checks-in-clarinet
+[repl.analysis.check_checker]
+strict = false
+trusted_sender = false
+trusted_caller = false
+callee_filter = false

README.md

@@ -0,0 +1,173 @@
+# AssetBridge: Advanced Real-World Asset Tokenization Protocol
+
+![Platform: Stacks](https://img.shields.io/badge/Platform-Stacks-5546FF)
+![Bitcoin: L2](https://img.shields.io/badge/Bitcoin-L2-orange)
+
+AssetBridge is a sophisticated smart contract protocol built on Stacks that enables the tokenization of real-world assets with secure fractional ownership capabilities. Leveraging Bitcoin's security through Stacks' PoX consensus, it provides a robust framework for creating, managing, and trading tokenized assets while maintaining regulatory compliance.
+
+## Key Features
+
+### Asset Tokenization
+
+- **Asset Creation**: Create digital representations of real-world assets with configurable supply and metadata
+- **Fractional Ownership**: Enable multiple investors to own shares of high-value assets
+- **Metadata Management**: Store and manage comprehensive asset information using IPFS/Arweave URIs
+- **Supply Configuration**: Flexible total supply and fractional share settings
+
+### Security & Compliance
+
+- **Bitcoin-Anchored Security**: Utilizes Stacks' PoX consensus for Bitcoin-level security
+- **Built-in Compliance**: Automated KYC/AML checks for all transfers
+- **Granular Access Control**: Administrative controls for compliance management
+- **Event Logging**: Comprehensive transaction and state change tracking
+
+### Ownership Management
+
+- **Secure Transfers**: Atomic ownership transfers with Bitcoin finality
+- **Share Management**: Efficient tracking of fractional ownership
+- **Compliance Verification**: Pre-transfer compliance checks
+- **NFT Integration**: Non-fungible tokens representing primary ownership
+
+## Technical Architecture
+
+### Core Components
+
+1. **Asset Registry**
+
+   - Tracks asset details and ownership
+   - Stores metadata URIs and configuration
+   - Manages transferability settings
+
+2. **Compliance System**
+
+   - Maintains user compliance status
+   - Tracks approval history
+   - Enforces transfer restrictions
+
+3. **Share Management**
+
+   - Handles fractional ownership accounting
+   - Manages share transfers
+   - Tracks individual balances
+
+4. **Event System**
+   - Logs all contract interactions
+   - Maintains audit trail
+   - Enables external monitoring
+
+## Smart Contract Interface
+
+### Public Functions
+
+#### Asset Management
+
+```clarity
+(create-asset
+  (total-supply uint)
+  (fractional-shares uint)
+  (metadata-uri (string-utf8 256))
+)
+```
+
+Creates a new tokenized asset with specified supply and share configuration.
+
+#### Ownership Transfer
+
+```clarity
+(transfer-fractional-ownership
+  (asset-id uint)
+  (to-principal principal)
+  (amount uint)
+)
+```
+
+Transfers fractional ownership shares between parties.
+
+#### Compliance Management
+
+```clarity
+(set-compliance-status
+  (asset-id uint)
+  (user principal)
+  (is-approved bool)
+)
+```
+
+Updates compliance status for users.
+
+### Read-Only Functions
+
+```clarity
+(get-asset-details (asset-id uint))
+(get-owner-shares (asset-id uint) (owner principal))
+(get-compliance-details (asset-id uint) (user principal))
+(get-event (event-id uint))
+```
+
+## Error Handling
+
+The contract defines several error constants for proper error handling:
+
+- `ERR-UNAUTHORIZED` (u1): Access control violation
+- `ERR-INSUFFICIENT-FUNDS` (u2): Insufficient balance for operation
+- `ERR-INVALID-ASSET` (u3): Invalid asset ID or reference
+- `ERR-TRANSFER-FAILED` (u4): Transfer operation failure
+- `ERR-COMPLIANCE-CHECK-FAILED` (u5): Failed compliance verification
+- `ERR-INVALID-INPUT` (u6): Invalid input parameters
+- `ERR-INSUFFICIENT-SHARES` (u7): Insufficient shares for transfer
+- `ERR-EVENT-LOGGING` (u8): Event logging failure
+
+## Security Considerations
+
+1. **Access Control**
+
+   - Contract owner privileges
+   - Compliance officer roles
+   - Transfer restrictions
+
+2. **Data Validation**
+
+   - Input parameter validation
+   - Asset existence checks
+   - Share balance verification
+
+3. **Compliance Enforcement**
+   - Automated compliance checks
+   - Transfer restrictions
+   - Administrative controls
+
+## Usage Examples
+
+### Creating a New Asset
+
+```clarity
+;; Create a new asset with 1000 total shares
+(contract-call? .asset-bridge create-asset
+  u1000 ;; total-supply
+  u10   ;; fractional-shares (minimum transfer amount)
+  "ipfs://QmXgZAUWd8Ua9vQMPLetPQb6DrwzYhUPJoYJewdYgQwYk2" ;; metadata-uri
+)
+```
+
+### Transferring Shares
+
+```clarity
+;; Transfer 100 shares to another user
+(contract-call? .asset-bridge transfer-fractional-ownership
+  u1    ;; asset-id
+  'ST1PQHQKV0RJXZFY1DGX8MNSNYVE3VGZJSRTPGZGM  ;; to-principal
+  u100  ;; amount
+)
+```
+
+## Development Setup
+
+1. Install Clarinet for local development
+2. Clone the repository
+
+## Contributing
+
+1. Fork the repository
+2. Create a feature branch
+3. Commit changes
+4. Submit a pull request