Transaction processing: EVM vs SVM account model differences — Forge College
Why do transactions that behave predictably on Ethereum break or behave differently on Solana? Understanding transaction sequencing and account mechanics is critical for accurate threat modeling and secure smart-contract design across runtimes.
What you'll learn
This lesson compares nonce-based sequencing in the EVM with Solana VM’s explicit account-declaration and account-locking model, and explains why those differences change ordering, atomicity, and race-surface area. You will learn how per-account nonces create a single linear order for signer-originated actions in EVM, and how SVM’s declared accounts and runtime locking enable parallel execution but introduce cross-account concurrency risks. The lesson walks through signer semantics (how signatures are attached and verified), account ownership and access relationships, and a concrete transaction build-and-process workflow in both runtimes so you can spot divergent state-consistency guarantees.
Who this is for
Intermediate developers and security engineers who already understand basic EVM transaction mechanics and want to pivot that mental model to Solana. Prior familiarity with nonces, signatures, and smart contract state is assumed.
Key topics covered
Nonce-based ordering in EVM versus account-declaration ordering in SVM
Signer semantics: attachment, verification, and authorization differences
Account ownership, access checks, and runtime-enforced invariants
Atomicity of cross-account interactions and where it can break
Parallel execution, account-level locking, and race conditions
Practical transaction construction and processing workflows for security checks
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