How you build & deploy well on Sui

You start by learning the core tools: install the Sui CLI, understand Move (the smart contract language), get familiar with Sui’s object-centric model, and work in the devnet or testnet before going live. Use SDKs that Sui provides or that the community maintains (TypeScript, Rust, Go, Python, Swift, etc.) so you don’t reinvent the wheel. Develop smart contracts in Move, write tests (unit tests) early, validate for security (use formal verification or Sui’s Prover where possible). Make your frontend using known frameworks (React, Vue, etc.), integrate wallet interactions well, show clear transaction feedback, and handle errors so the user experience is smooth.

When you’re ready to deploy, do a staged rollout: build and test locally, deploy to devnet or testnet, fix issues, then publish contracts (packages/modules) to mainnet. Monitor for any bugs, watch gas usage, optimize expensive operations, batch when possible, use parallel execution of independent transactions.  Also ensure proper access control, safe input validation, avoid common contract pitfalls (like reentrancy, unchecked exceptions). 

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Things you must do or watch out for

You must: • Use the Sui Developer Portal and Guides to stay updated.  • Write good tests (unit, integration) before deploying.  • Estimate gas budgets properly, because under-estimating can lead to failed transactions or unnecessary costs.  • Integrate or support wallets well, make onboarding easy for users.  • Monitor after deployment: watch for errors, unusual usage, and have upgrade paths or patching strategies.

I'll provide a comprehensive guide to building and deploying dApps on the Sui blockchain.

Development Environment Setup

First, let's set up your development environment with the essential tools:

# Install Sui CLI
curl --proto '=https' --tlsv1.2 -sSf https://build.sui.io/install | sh

# Install Move development tools
git clone https://github.com/Mysten/Labs.git
cd Labs/move-tools
cargo build --release

# Install Sui SDK for your preferred language
# For TypeScript/JavaScript:
npm install @mysten/sui-sdk

# For Python:
pip install sui-sdk

Development Tools and SDKs

The Sui ecosystem provides several essential tools for efficient development:

1. Core Development Tools - Sui CLI: Command-line interface for network interaction

• Move CLI: Smart contract development and testing
• Sui SDK: Language-specific libraries for dApp development
• Sui Devnet: Testing environment for development

2. Smart Contract Development```move // Example Move contract structure module my_module { use sui::transfer; use sui::object;

   struct MyNFT has key { id: UID, owner: address, metadata: String, }

   public entry fun create_nft( ctx: &mut TxContext, metadata: String, ): MyNFT { let id = object::new_uid(ctx); MyNFT { id, owner: tx_context::signer(ctx), metadata, } } }

###  Testing and Optimization

Here's a comprehensive testing framework for your Move contracts:

```move
// Test module for contract verification
module test {
    use sui::test_scenario;
    use sui::transfer;

    #[test]
    fun test_nft_creation() {
        let scenario = test_scenario::builder().build();
        let sender = scenario.address(0);
        
        // Test creation
        let nft = create_nft(&mut scenario.ctx, "test-metadata".to_string());
        assert!(exists(nft.id), 1);
        
        // Test ownership
        assert!(nft.owner == sender, 2);
    }
}

Wallet Integration and Transaction Management

For robust wallet integration, implement these patterns:

// TypeScript example using Sui SDK
import { SuiClient, TransactionBlock } from '@mysten/sui-sdk';

class WalletIntegration {
    private client: SuiClient;
    private signer: Signer;

    constructor(network: string) {
        this.client = new SuiClient(network);
        this.signer = new Signer();
    }

    async executeTransaction(
        transaction: TransactionBlock,
        options: {
            gasBudget: bigint;
            gasPrice: bigint;
        }
    ): Promise<string> {
        const signedTx = await this.signer.signWithTransactionBlock({
            transaction,
            gasBudget: options.gasBudget,
            gasPrice: options.gasPrice,
        });

        return await this.client.submitTransaction(signedTx);
    }
}

Best Practices

1. Security - Use Move's formal verification for critical functions

• Implement proper access control
• Test for reentrancy attacks
• Validate all inputs

2. Performance - Optimize gas usage in transactions

• Batch similar operations
• Use parallel execution where possible
• Implement caching for frequent operations

3. User Experience - Provide clear transaction feedback

• Implement proper error handling
• Use type-safe interfaces
• Maintain consistent state management

Deployment Process

Follow this structured approach for deploying your dApp:

# Build Move contracts
move build

# Deploy to Devnet for testing
sui client --gateway https://fullnode.devnet.sui.io deploy

# Deploy to Mainnet
sui client --gateway https://fullnode.mainnet.sui.io deploy

# Verify deployment
sui client --gateway https://fullnode.mainnet.sui.io objects owned-by $YOUR_ADDRESS

Common Pitfalls to Avoid

1. Development - Not testing gas limits thoroughly

• Ignoring Move's object-oriented patterns
• Not implementing proper error handling
• Missing input validation

2. Deployment - Not testing on Devnet before Mainnet

• Incorrect gas budget estimation
• Missing proper access control
• Inadequate monitoring setup

Always follow Sui's best practices and thoroughly test your dApp before deployment. The Sui ecosystem is actively evolving, so stay updated with the latest developments and security recommendations.