Every time I audit a smart contract that lost millions to a reentrancy attack, I ask myself the same question: could a better language have prevented this? After two decades working across blockchain security and digital forensics, I've come to believe that the choice of smart contract language is not just a technical preference—it's a security decision with financial consequences. Let me share why Soroban, Stellar's smart contract platform, deserves serious attention next to the industry veteran, Solidity.
The Foundation: Rust vs. Solidity's Design Philosophy
Solidity was purpose-built for the Ethereum Virtual Machine (EVM), and that specialization is both its strength and its weakness. Its C-like syntax makes it approachable, but it inherits dangerous flexibility. According to Chainalysis, over $3.8 billion was stolen from DeFi protocols in 2022 alone, with a significant share tied to smart contract vulnerabilities—reentrancy, integer overflow, and unchecked external calls being the classic culprits.
Soroban, by contrast, is built on Rust and compiles to WebAssembly (WASM). In my work, I've found that Rust's ownership model and compile-time memory safety eliminate entire categories of bugs before code ever reaches production. When I first migrated a tokenization prototype from Solidity to Soroban, I noticed something telling: errors that Solidity would have silently allowed at runtime were caught by Rust's compiler in seconds. As André Dias Moreira Prol, I've always argued that the safest bug is the one that never compiles.
