Implement Asset Tokenization and Fractional Ownership Contract

[yusuftomilola]

Description

Develop a smart contract that enables tokenization of physical assets, fractional ownership through fungible tokens, and secure trading of ownership shares on the Stellar network.

Requirements

Contract State:

• Tokenized assets mapping (asset_id → TokenizedAsset)
• Token balances mapping (asset_id → owner_address → token_balance)
• Token metadata mapping (asset_id → TokenMetadata)
• Total supply per asset
• Ownership threshold requirements
• Trading permissions
• Dividend distribution records
• Asset registry contract address

TokenizedAsset Data Structure:

• Original asset ID (reference to registry)
• Total token supply
• Token symbol (unique per asset)
• Token decimals
• Minimum ownership requirement (for voting rights)
• Token holders count
• Total tokens in circulation
• Locked tokens (non-transferable)
• Tokenization timestamp
• Tokenizer address
• Asset valuation (in stroops)
• Revenue sharing enabled flag

TokenMetadata Data Structure:

• Asset name
• Token description
• Underlying asset type
• IPFS metadata URI
• Legal documentation hash
• Valuation report hash
• Regulatory compliance status
• Geographic restrictions
• Transfer restrictions
• Accredited investor requirement

Ownership Record:

• Owner address
• Token balance
• Acquisition timestamp
• Average purchase price
• Voting power
• Dividend entitlement
• Lock period (if applicable)
• Ownership percentage

Core Functions:

• Initialize contract with asset registry address
• Tokenize asset (convert physical asset to tokens)
• Mint additional tokens (for asset appreciation)
• Burn tokens (for asset depreciation or buyback)
• Transfer tokens (fractional ownership transfer)
• Get token balance for owner
• Get all token holders for asset
• Calculate ownership percentage
• Lock tokens (prevent transfer for period)
• Unlock tokens
• Distribute dividends/revenue to token holders
• Vote on asset decisions (if voting enabled)
• Update asset valuation
• Detokenize asset (require majority ownership)
• Set transfer restrictions
• Whitelist addresses (for restricted tokens)

Access Control:

• Contract admin: Overall contract management
• Asset tokenizer: Original asset owner who tokenized
• Token holders: Own fractional shares
• Majority holders: Can influence asset decisions
• Whitelisted addresses: Can bypass transfer restrictions

Events to Emit:

• AssetTokenized (asset_id, total_supply, tokenizer, timestamp)
• TokensMinted (asset_id, amount, minted_by, timestamp)
• TokensBurned (asset_id, amount, burned_by, timestamp)
• TokensTransferred (asset_id, from, to, amount, timestamp)
• TokensLocked (asset_id, owner, amount, lock_period, timestamp)
• TokensUnlocked (asset_id, owner, amount, timestamp)
• DividendDistributed (asset_id, total_amount, timestamp)
• ValuationUpdated (asset_id, old_value, new_value, timestamp)
• AssetDetokenized (asset_id, final_owner, timestamp)
• VoteCast (asset_id, voter, voting_power, timestamp)

Validation Rules:

• Only asset owner can tokenize asset
• Asset must exist in registry and be verified
• Asset cannot be already tokenized
• Total supply must be greater than zero
• Cannot transfer more tokens than balance
• Cannot transfer to zero address
• Must meet minimum ownership for voting
• Locked tokens cannot be transferred
• Dividend distribution requires sufficient contract balance
• Detokenization requires majority token ownership (>50%)
• Transfer restrictions must be enforced

Business Logic:

• Calculate proportional dividend distribution based on token holdings
• Implement voting power weighted by token ownership
• Support time-locked tokens for vesting schedules
• Track token holder count efficiently
• Calculate and update ownership percentages automatically
• Implement buyback mechanism for token redemption
• Support partial detokenization (reduce supply)
• Handle token splits and merges
• Implement transfer restrictions (geographic, accredited investor)
• Support secondary market trading

Tokenization Features:

• Full tokenization: 100% of asset converted to tokens
• Partial tokenization: Tokenize percentage of asset value
• Multi-tier tokens: Different classes with different rights
• Revenue-sharing tokens: Auto-distribute income to holders
• Governance tokens: Voting rights on asset decisions
• Redeemable tokens: Can be exchanged for underlying asset

Dividend Distribution:

• Calculate each holder's share based on token balance
• Support batch distribution to all holders
• Track unclaimed dividends
• Allow holders to claim dividends
• Support different distribution methods (proportional, fixed)

Voting Mechanism:

• One token = one vote (or weighted voting)
• Minimum token threshold for voting eligibility
• Quorum requirements for decisions
• Time-limited voting periods
• Delegated voting support

Technical Specifications

• Follow Stellar Asset Contract (SAC) standards where applicable
• Implement efficient token balance tracking
• Use batch operations for dividend distribution
• Optimize gas costs for holder enumeration
• Implement safe math for token calculations
• Support cross-contract calls to asset registry
• Use events for indexing token transfers
• Implement reentrancy protection for transfers

Acceptance Criteria

• Assets can be tokenized with specified supply
• Token transfers work correctly and update balances
• Token holders can be enumerated efficiently
• Ownership percentages calculate correctly
• Dividend distribution works proportionally
• Locked tokens cannot be transferred
• Voting mechanism works with token-weighted power
• Detokenization requires majority ownership
• Transfer restrictions are enforced
• All events are emitted correctly

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[Samuel1505]

@Samuel1505 has applied to work on this issue as part of the Stellar Wave Program's 1st wave.

I would like to work o this issue, i’m a blockchain developer with strong expertise in Stellar, Rust,. I’ve worked on multiple Stellar-based smart contract. Kindly assign me.

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[Arowolokehinde]

@Arowolokehinde has applied to work on this issue as part of the Stellar Wave Program's 1st wave.

Hi
i would like to work on this issue, i have a solid background in Rust.
I have built, shipped, and contributed to projects using Soroban smart contracts, gaining hands-on experience writing efficient Rust programs and designing reliable test cases for real-world systems. I also recently contributed to the Rootstock ecosystem, working with both Solidity and Rust, which strengthened my understanding of cross-chain and blockchain-based architectures.

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[aguilar1x]

@aguilar1x has applied to work on this issue as part of the Stellar Wave Program's 1st wave.

Hey, I’m Matias Aguilar full-stack & smart contract dev in the Stellar ecosystem and Parhfinder role in stellar community.

I’ve been building RWA tooling and DeFi apps with Soroban, and I love tackling technical challenges with fast-moving teams. Super excited to jump in and help with this one!

ℹ️ Repo Maintainers: To accept this application, review their application or assign @aguilar1x to this issue.

[Majormaxx]

@Majormaxx has applied to work on this issue as part of the Stellar Wave Program's 1st wave.

Hi @yusuftomilola,

Relevant Experience: I've built tokenization and ownership systems in smart contracts, including mantle-relayer with multi-party signature verification and transaction execution. I understand ERC-20/1155 patterns which map directly to fractional ownership tokens.

Technical Approach:

Core Storage Architecture:

• tokenized_assets: Map<AssetId, TokenizedAsset>
• balances: Map<(AssetId, Address), u128>
• ownership_records: Map<(AssetId, Address), OwnershipRecord>
• dividend_pool: Map<AssetId, u128>

Key Functions (Priority Order):

1. Tokenization: tokenize_asset() - verify asset in registry, mint initial supply
2. Transfers: transfer() with restriction checks (geographic, accreditation, lock periods)
3. Dividend Distribution: Batch proportional distribution with unclaimed tracking
4. Voting: Token-weighted voting with quorum requirements
5. Detokenization: Require >50% ownership consolidation

Security Patterns:

• Reentrancy guards on all transfers
• Access control: admin, tokenizer, majority holder roles
• Safe math for proportional calculations
• Lock period enforcement before transfer

Testing Strategy:

• Unit tests for each core function
• Integration tests for dividend distribution
• Edge cases: locked tokens, restriction bypasses, majority threshold

Portfolio Proof: mantle-relayer - multi-party verification, ownership patterns, transaction security.

Timeline: 5-10 hours (phased: Core → Transfers → Voting → Dividends)

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Majormaxx to this issue.

[Bosun-Josh121]

@Bosun-Josh121 has applied to work on this issue as part of the Stellar Wave Program's 1st wave.

Hello maintainers,

I am an active open-source contributor and I have a strong background in backend and smart contract engineering (specifically Stellar/Soroban) and I would like to tackle this issue.

This issue aligns perfectly with my skillset as I have previously built similar functionality and have reviewed the current codebase, so I am prepared to navigate the architecture without issues.

I can commit to delivering a clean, tested solution within 24 hours. I value clear communication and am happy to iterate on any feedback during the review process.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Bosun-Josh121 to this issue.

[AbdulSnk]

@AbdulSnk has applied to work on this issue as part of the Stellar Wave Program's 1st wave.

I would like to work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @AbdulSnk to this issue.

[AbdulSnk]

@AbdulSnk has applied to work on this issue as part of the Stellar Wave Program's 1st wave.

Hi team,

I’d like to take on Issue #373: Implement Asset Tokenization and Fractional Ownership Contract. I have experience with smart contracts and fractional ownership mechanisms, and I’m confident I can design a clean, secure, and efficient solution that aligns with the project standards.

I plan to start by outlining the contract structure, defining tokenization logic, and implementing fractional ownership features step by step, ensuring clarity and test coverage throughout.

Looking forward to your approval.

Thanks,

ℹ️ Repo Maintainers: To accept this application, review their application or assign @AbdulSnk to this issue.

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Congratulations, @AbdulSnk! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on January 31, 2026.

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