EVM Compatibility

Overview

The IOST 3.0 platform adopts a strategic cross-chain deployment approach, coupled with comprehensive Ethereum Virtual Machine (EVM) compatibility design, providing maximum ecosystem coverage and development convenience for RWA smart contracts.

Cross-Chain Deployment Strategy

BSC Primary Deployment

The core RWA smart contracts of IOST 3.0 are primarily deployed on BNB Smart Chain (BSC), a strategic choice based on the following considerations:

• Rich Liquidity: BSC has an active DeFi ecosystem and ample liquidity pools
• Large User Base: BSC's extensive user community provides a broader market for RWA assets
• Mature Protocol Ecosystem: Direct integration with existing lending, trading and other protocols
• Comprehensive Infrastructure: Oracle services, cross-chain bridges and other supporting services are already well-established

IOST L2 Synchronized Deployment

Core contracts are also deployed on the IOST Layer 2 network to achieve:

• Ecosystem Consistency: Ensuring that applications within the IOST ecosystem can seamlessly connect to RWA functionality
• Performance Optimization: Leveraging L2's high throughput and low fee characteristics
• Customized Functional Extensions: Enhanced functionality tailored to IOST-specific requirements

Full EVM Compatibility

Technical Implementation

The IOST L2 network adopts a fully EVM-compatible design, which mainly includes:

• Instruction Set Compatibility: Support for all opcodes and execution logic of the Ethereum virtual machine
• State Management Model: Adoption of account and storage structures consistent with Ethereum
• Transaction Format Standardization: Support for standard Ethereum transaction formats and signature mechanisms
• Contract Interface Standardization: Full compatibility with ERC standards (ERC20, ERC721, etc.)

Developer Advantages

This architecture brings significant convenience to developers:

// Standard EVM contract example, can be directly deployed on IOST L2
contract RWAToken is ERC20 {
    constructor(string memory name, string memory symbol) 
        ERC20(name, symbol) {
        // Initialization logic
    }
    
    // Custom RWA related functionality
    function verifyAsset(bytes32 assetId) external returns (bool) {
        // Asset verification logic
    }
}

• Can use Solidity language for smart contract development
• Directly utilize mainstream development frameworks like Truffle, Hardhat
• Seamlessly integrate standard contract libraries such as OpenZeppelin
• Apply existing EVM security audit tools and best practices

User Experience

Users also benefit from this compatibility:

• Can use mainstream wallets like MetaMask to connect directly to IOST L2
• Enjoy interaction experiences similar to Ethereum, reducing the learning curve
• Assets can be conveniently migrated between different EVM-compatible chains

Cross-Chain Synergy Advantages

The dual-chain deployment strategy combined with EVM compatibility brings core values:

1. Enhanced Liquidity: RWA assets can circulate simultaneously in BSC and IOST L2 ecosystems
2. Improved Development Efficiency: The same codebase can be deployed across multiple chains, simplifying maintenance
3. Risk Diversification: Reduce single point of failure risk through multi-chain deployment
4. Ecosystem Synergy Effect: Can simultaneously leverage developer and user resources from both ecosystems

Application Scenarios

Asset Management System

IOST's asset management system contracts are deployed simultaneously on BSC and IOST L2, achieving:

• Asset minting and liquidity provision primarily on BSC
• High-frequency trading and fine-grained permission management on IOST L2
• Synchronization and transfer of assets across both chains through cross-chain bridges

Separated Bond System

Utilizing the dual-chain strategy, the separated bond system can:

• Separate principal and yield rights operations on BSC
• Provide low-cost secondary market trading on IOST L2
• Ensure cross-chain data consistency and state synchronization

Developer Guide

Below is the basic configuration for developing and deploying cross-chain RWA applications in the IOST ecosystem:

// Project configuration example
// truffle-config.js example
module.exports = {
  networks: {
    bsc: {
      provider: () => new HDWalletProvider(mnemonic, `https://bsc-dataseed.binance.org`),
      network_id: 56,
      confirmations: 10,
      timeoutBlocks: 200,
      skipDryRun: true
    },
    iostl2: {
      provider: () => new HDWalletProvider(mnemonic, `https://l2-mainnet.iost.io`),
      network_id: 182,  // IOST L2 network ID
      confirmations: 2,
      timeoutBlocks: 50,
      skipDryRun: true
    }
  }
}

// Multi-chain deployment script example
// deploy.js
async function deployToMultipleChains() {
  // First deploy to BSC
  const bscContract = await deployer.deploy(RWAToken, "IOST RWA", "IRWA", {from: deployer_address, network: "bsc"});
  console.log(`Contract deployed to BSC: ${bscContract.address}`);
  
  // Then deploy to IOST L2
  const l2Contract = await deployer.deploy(RWAToken, "IOST RWA", "IRWA", {from: deployer_address, network: "iostl2"});
  console.log(`Contract deployed to IOST L2: ${l2Contract.address}`);
  
  // Record contract addresses for subsequent cross-chain operations
  saveContractAddresses({
    bsc: bscContract.address,
    iostl2: l2Contract.address
  });
}

Multi-Chain Development and Deployment Process

IOST 3.0 provides complete development environment support, allowing developers to:

• Use standard Ethereum development toolchains
• Code once, deploy to multiple chains
• Implement asset and data interoperability using cross-chain tools
• Optimize contract design on L2 for high-performance scenarios

Development Best Practices

1. Environment Preparation: Ensure configuration of development environments for both BSC and IOST L2
2. Contract Design: Consider cross-chain interoperability during the design phase
3. Testing Strategy: Test first on each chain's testnet, then test cross-chain interactions
4. Deployment Monitoring: Use professional tools to monitor state consistency of contracts across different chains

After deployment, you can use the cross-chain bridge tools provided by IOST to enable cross-chain interoperability for assets and operations. For high-frequency trading scenarios, it is recommended to prioritize the IOST L2 network for better performance and lower costs.

Future Outlook

The EVM compatibility and cross-chain deployment strategy of IOST 3.0 will continue to evolve:

• Continuously optimize L2 performance, enhancing transaction processing capabilities
• Explore integration with more EVM-compatible chains
• Develop more efficient cross-chain interoperability mechanisms
• Advance the application of RWA assets in broader financial scenarios

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Related Resources:

• RWA Platform Overview
• IOST L2 Architecture
• Smart Contract Development