Same result on every validator
Every validator must get the same result when it runs the same transaction from the same starting state.
Fast C++ Programs
C++ programs.
Running right on the chain.
Build C++ smart contracts that run directly inside AppLayer and still look familiar to outside apps.
01 / PRIMITIVE
The simple version
A smart contract that runs like a normal C++ program.
Fast C++ Programs are reusable smart contracts compiled into AppLayer. They keep familiar addresses and interfaces but run through a more capable path.
Pick what fits
C++ program or EVM contract?
Both use AppLayer. The difference is how the code runs.
RequirementEVM contractNative Module
Solidity portabilityBest fitExternal ABI compatible
Complex code that remembersMore limitedBuilt for it
Native C++ librariesUnavailableWorks when every node gets the same answer
Calls between programsPacked into ABI messagesTalks directly
Familiar toolsHighestSpecial build tools
How one call runs
From app request to saved result.
- 01
App calls a contract
An app calls a familiar contract address and ABI.
- 02
Run the C++ program
AppLayer sends the call to the compiled C++ program.
- 03
Run with working memory
The program reads and changes its saved, typed data.
- 04
Programs work together
C++ contracts can call one another directly.
- 05
Save or undo
The whole change is saved together or safely undone.
Safety rules
Fast still needs rules.
Clear data ownership
Each program clearly says what data it saves and owns.
No half-finished changes
If a transaction fails, half of its changes cannot remain.
Controlled upgrades
Everyone can see who may upgrade a program and how.
Start with one real job
Build more than a basic smart contract.
Try the public code and testnet guide, or bring us a complex job that needs fast C++.