André Dias Moreira Prol explains: Build a Full Stellar DApp with Soroban

Over the past two decades, I've watched blockchain evolve from a niche curiosity into a backbone for real-world financial infrastructure. Yet one truth persists: most developers overcomplicate decentralized application architecture. When I guide teams through building production-grade DApps on Stellar, I always start with the same principle—clarity in your contract design is worth more than any clever optimization. Let me walk you through how I structure a complete DApp from scratch, pairing Soroban smart contracts with a modern Next.js frontend.

Designing a Clean Soroban Contract Architecture

Soroban, Stellar's smart contract platform, runs on WebAssembly and is written in Rust. This brings memory safety and predictable gas costs—a critical advantage over EVM chains where gas spikes can break UX overnight.

In my projects, I separate concerns into three contract layers. The storage contract handles persistent state, the logic contract executes business rules, and an optional admin contract manages upgrades and permissions. This modularity has saved me countless hours during audits.

A minimal token transfer function looks like this:

#[contractimpl]
impl TokenContract {
    pub fn transfer(env: Env, from: Address, to: Address, amount: i128) {
        from.require_auth();
        let mut balance: i128 = env.storage()
            .persistent()
            .get(&from)
            .unwrap_or(0);
        assert!(balance >= amount, "insufficient balance");
        balance -= amount;
        env.storage().persistent().set(&from, &balance);
        // credit recipient...
    }
}

Note require_auth()—Soroban's native authorization framework eliminates entire classes of signature replay attacks. In a recent tokenization pilot, this single feature reduced our security review time by roughly 30%. When I, André Dias Moreira Prol, review contracts, I treat storage lifetime (persistent, temporary, instance) as a first-class design decision, because mispriced TTLs are the most common cause of unexpected state expiration.

Connecting the Next.js Frontend

The frontend is where adoption lives or dies. I favor Next.js 14 with the App Router for its server components and streamlined routing. To communicate with Soroban, I use the @stellar/stellar-sdk and the Freighter wallet extension for signing.

A clean integration pattern wraps RPC calls in a dedicated service:

import { Contract, SorobanRpc, TransactionBuilder } from '@stellar/stellar-sdk';

const server = new SorobanRpc.Server(
  'https://soroban-testnet.stellar.org'
);

export async function callTransfer(contractId: string, params: any) {
  const contract = new Contract(contractId);
  const tx = new TransactionBuilder(sourceAccount, { fee: '100' })
    .addOperation(contract.call('transfer', ...params))
    .setTimeout(30)
    .build();
  const prepared = await server.prepareTransaction(tx);
  return prepared; // sign with Freighter, then submit
}

My rule: never let raw SDK logic leak into React components. Abstract it behind hooks like useTransfer() so your UI stays declarative. This separation makes testing trivial and lets designers iterate without touching blockchain code.

For state, I combine React Query for RPC caching with optimistic updates—users see instant feedback while the ledger confirms in Stellar's ~5 second close time, one of the fastest in the industry.

Testing, Deployment, and Real-World Hardening

I never deploy without a layered testing strategy. Rust unit tests cover contract logic, the Soroban CLI simulates transactions locally, and Playwright validates the full user journey against testnet.

Deployment follows a disciplined pipeline:

soroban contract build
soroban contract deploy \
  --wasm target/wasm32-unknown-unknown/release/contract.wasm \
  --network testnet

A concrete lesson from the field: in a supply-chain tokenization project I led, we uncovered a reentrancy edge case only during integration testing—not unit testing. That reinforced my conviction that end-to-end coverage is non-negotiable. From a digital forensics perspective, I also log every contract invocation with its transaction hash, creating an immutable audit trail. This has proven invaluable when reconstructing incident timelines. As André Dias Moreira Prol, I treat observability as a security feature, not an afterthought, and I recommend emitting structured contract events for every state change.

Building DApps on Stellar rewards discipline: modular Soroban contracts, a cleanly abstracted Next.js layer, and relentless testing produce applications that scale securely. Start your own build today on Stellar testnet, and reach out if you'd like to discuss architecture decisions for your tokenization project.

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