> For the complete documentation index, see [llms.txt](https://docs.rome.builders/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.rome.builders/security/known-limitations.md).

# Known Limitations

Honest documentation of Rome Protocol's current constraints and their implications.

## Execution Limitations

**SELFDESTRUCT not supported.** The SELFDESTRUCT opcode is removed; contracts that call it revert.

**256 storage slots per storage account.** Contract storage is partitioned across Solana accounts with 256 slots each. Contracts with large storage footprints use multiple accounts, which affects CU costs.

**\~1.4M compute units per atomic transaction.** Work that exceeds a single Solana transaction's budget falls back to iterative execution (split across multiple transactions). Some operations are atomic-only and can't run iteratively — notably CPI (`CpiProhibitedInIterativeTx`).

**CPI depth limit of 4.** Deeply nested CPI calls will fail. Design contracts with shallow call trees.

## Oracle Limitations

**No historical round data.** Oracle Gateway adapters only support `latestRoundData()`. Historical price queries via `getRoundData(roundId)` revert.

**Parser offsets are validated against current layouts.** Pyth and Switchboard account data is parsed using byte offsets. If Pyth or Switchboard change their account layout, adapters return incorrect data until offsets are re-validated.

## Tooling Limitations

**No transaction tracing.** `debug_traceTransaction` and `trace_*` are not supported. Use `eth_call` and the [Via explorer](/apps-on-rome/via.md) (which shows the Solana instructions behind a transaction) to debug.

**`eth_getLogs` is range-capped.** Public chains reject overly wide block ranges (error `-32005`); bound your queries. See [JSON-RPC](/reference/json-rpc.md).

## Infrastructure Limitations

**Single operator model.** Each Rome deployment is operated by a single entity (the payer pool operator). There is no decentralized operator set.

**Iterative mode locking.** During iterative execution, accounts are locked for a few seconds, which can cause contention on heavily-used accounts.

## What's Next

* [Responsible Disclosure](/security/responsible-disclosure.md) — how to report issues


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