Technical Architecture

Overview and Design Principles PropChain’s technical architecture is meticulously designed to deliver exceptional scalability, interoperability, security, and modularity. Built to support rapid integration, expansion, and innovation our architecture ensures robust operational efficiency and compliance. Blockchain Layer

• Ethereum Mainnet – primary network for PropYield (On-chain) and PROPC token including vesting contracts, staking and CCIP integration - High adoption, strong security, rich tooling, and deep DeFi integrations (PoS)

• Polygon PoS – used for deploying real estate tokens following the CMTAT standard - Lower gas fees, Ethereum compatibility, supports high-volume operations for real estate token minting (PoS)

• Solana – connected via Wormhole for cross-chain bridging of PROPC - Fast finality and low transaction cost; used for targeted cross-chain interoperability (PoH & PoS)

Smart Contract Infrastructure Smart contracts automate complex processes, significantly enhancing efficiency, reducing errors, and ensuring compliance.

Prochain core contracts include:

• PROPC Token: ERC20 implementation on Ethereum

• Staking Contracts:

  • Pool-based staking with fixed APYs, penalty structure, and claim locks

  • Multi-stake support, dynamic penalties (decreasing over time), min/max thresholds, VIP pool access

• Vesting Contracts: Custom-built contracts for phased token distribution with TGE, ticks, and admin-managed liquidity

• Cross-chain Bridge: Wormhole bridge to Solana for token mirroring

• Swap Integration: Chainlink CCIP integrated with xSwap for token swaps across chains

Off-Chain Integrations:

• Analytics Integration: CoinGecko and other market data feeds (read-side)

• Oracles (Planned): Chainlink Data Feeds and potential custom off-chain valuation for real estate

Audits and Security

• Audit Partner - Zokyo: Comprehensive smart contract audit including:

  • Line-by-line manual code review

  • Cross-comparison with leading DeFi contracts

  • Foundry-based fuzz testing and integration test coverage

  • Attack vector simulation and risk categorization (Critical to Informational)

  • 100% resolved actionable issues in the report

  • Code testability coverage of 96% (industry-leading)

• Practices:

  • Modular contract structure for upgradeability and minimal risk

  • Reentrancy guards, SafeMath, SafeERC20 utilities

  • PlatformAccessController for RBAC enforcement in vesting/staking