An optimistic rollup, described as it is

Fifteen pages, checked against the protocol's decision records and the node's own measurements. Every number is either measured, with its source named, or a named constant.

• Welcome to Solieum: Solieum is an optimistic rollup on Solana: transactions execute off-chain in an SVM environment, the data is published on Solana, and the resulting state is committed to Solana where an invalid commitment can be proven wrong.
• Introduction: What Solieum is, what it is not, and the four components plus one habit that the design rests on.
• Why Solana Needs a Layer 2: The case for a Layer 2 on a chain that is already fast, argued from what a rollup actually changes rather than from a throughput comparison.
• About Solana: The base layer Solieum settles to, and the specific properties a rollup on it depends on.
• Technical Architecture: The components, node roles, measured metrics and data structures, then how Solieum works in full: sequencing and admission, data availability, settlement, the state commitment and its versions, the trace a dispute is about, the one-step verifier and its classes, the unfinished binding of each step to a signed transaction, and the gaps that remain open.
• Security and Trust Assumptions: What the operator can do to you, what it cannot, the two timers between a state root and your money, the eight decisions taken after the 2026 bridge losses, and what none of it defeats.
• Wallet Bridge: The bridge in full: the deposit record and its relay anchor, the withdrawal encoding and leaf commitment, the proof format, what a pause may and may not touch, and the one key that reaches a proven withdrawal.
• Fees, Economics and the Token: What a transaction costs, what a block costs to settle, the size of today's subsidy, the five things that close it, and what the token is and is not for.
• SVM Compatibility: Where Solieum behaves exactly like Solana, where it is redefined, and where something is simply absent, with the replay evidence behind each claim.
• Solieum Programme Kit (SPK): What a developer can actually use today: the node's RPC surface, the command line, the one behaviour that will surprise you, and what does not exist.
• Solve Framework: Solve, Solieum's main framework, and its Cradle toolchain: what they produce for Solana runs on Solieum unchanged.
• Status and Roadmap: What is built, what is next, and the condition each stage is gated on rather than the quarter it is promised in.
• Protocol Parameters: Every parameter the protocol runs on, with its value, its unit, where it is fixed, and what it would take to change it.
• Glossary: The terms this paper uses, defined as Solieum uses them rather than in general.
• References and Resources: Links that resolve, contracts you can open on a block explorer, and an explicit list of the things that do not exist.