FAQs
This page answers common questions encountered by developers building applications on Flare networks.
Network & Tokens
Where can I get testnet tokens (faucet)?
Flare provides faucets for its public testnets:
- Flare Testnet Coston2: Get C2FLR from the Coston2 Faucet. Use Coston2 for testing applications intended for Flare mainnet.
- Songbird Testnet Coston: Get CFLR from the Coston Faucet. Use Coston for testing applications intended for the Songbird canary network.
How do I add Flare/Songbird networks to my wallet (e.g., MetaMask)?
The easiest way is to visit the respective block explorer, scroll down to the footer, and click the "Add Network" button:
- Flare Mainnet: Flarescan or Flare Explorer
- Coston2 Testnet: Coston2 Flarescan or Coston2 Explorer
- Songbird Canary-Network: Songbird Flarescan or Songbird Explorer
- Coston Testnet: Coston Flarescan or Coston Explorer
Alternatively, you can add them manually using the details on the Network Configuration page.
What's the difference between Flare and Songbird?
- Flare (FLR): The main production network with real economic value.
- Songbird (SGB): A "canary network" - blockchain used for testing protocol-level features and dApps in a live environment with real consequences before they are potentially deployed to Flare. It serves as a proving ground.
Read more on the Network Overview page.
Which RPC endpoint should I use?
- For Development/Testing: The Public RPCs are convenient for getting started. However, they have rate limits and shared resources.
- For Production Applications: It is strongly recommended to use a dedicated RPC endpoint from a provider for better performance, reliability, and support. See the Developer Tools page for options.
- For Running Nodes: You can also run your own RPC node.
What is the block time and finality on Flare?
Flare networks use the Snowman++ consensus protocol.
- Block Time: Approximately 1.8 seconds.
- Finality: Near-instantaneous (single-slot finality). Once a block is accepted by consensus, it's considered final.
Learn more on the Consensus page.
Development Resources
Where can I find the addresses of Flare's core smart contracts?
The addresses for contracts like WNat
, FtsoV2
, FdcHub
, etc., vary by network.
- Use the
FlareContractRegistry
: This contract acts as a directory. It has the same address (0xaD67FE66660Fb8dFE9d6b1b4240d8650e30F6019
) on all Flare networks (Flare, Coston2, Songbird, Coston). You can query itsgetContractAddressByName
orgetAllContracts
methods to find the addresses of other contracts on the specific network you are connected to. - Check the Solidity Reference: Deployed contract addresses for each network are listed on the relevant reference pages for convenience:
Are there official developer tools or SDKs?
Flare maintains several resources to aid development:
- Language-Specific Guides: Tutorials for interacting with Flare using JavaScript, Python, Go, and Rust.
- Starter Kits: Pre-configured project templates for Hardhat & Foundry.
- Developer Tools List: A curated list of RPCs, Indexers, Bridges, SDKs, and more.
Where can I learn about Flare-specific terminology?
Learn more about the terminology used in the Flare ecosystem (like FTSO, FSP, PDA, etc.) on the Terminology page.
Community & Support
I have a project I would like to build on Flare. Can I get a grant?
Yes! The Flare Foundation offers grants to support innovative projects that contribute to the ecosystem's growth. Learn more and apply on the Flare Grants Program page.
Where can I get technical support or ask questions?
Connect with Flare's developer community and the team through these channels:
- Flare Experts: Get dedicated Developer Support from a Flare expert.
- Discord: The primary channel for developer Q&A, discussions, and support. Join the Flare Network Discord and head to the developer channels.
- Telegram: Engage with the broader community on Telegram (may be less developer-focused).
- GitHub: Report issues, contribute to code, or explore the open-source repositories at Flare Foundation GitHub. (Best for code-specific issues, not general Q&A).