# Network > Learn about the different Flare networks, configuration, supported wallets, transaction format, smart contracts, consensus, and more. > For the complete documentation index, see [llms.txt](/llms.txt). Markdown versions of documentation pages are available by appending `.md` to the page URL. Source: https://dev.flare.network/network/overview Flare provides four EVM-compatible, permissionless networks designed for different stages of application and protocol development: - **Flare Mainnet:** The production network, transactions cost FLR here. - **Flare Testnet Coston2:** Testnet for dApp development. - **Songbird Canary-Network:** Experimental network for protocol upgrades, transactions cost SGB here. - **Songbird Testnet Coston:** Testnet for protocol development. Choose your development track depending on your goals: 1. **Application Development** (Recommended for dApp developers): - Flare Testnet Coston2 → Flare Mainnet 2. **Protocol Development** (Required for all protocol-level changes): - Songbird Testnet Coston → Songbird Canary-Network → Flare Testnet Coston2 → Flare Mainnet ## Configuration[​](#configuration "Direct link to Configuration") Specific configuration details for connecting to each Flare network, including public RPC endpoints, chain identifiers, blockchain explorers, and testnet faucets. Network name Flare Mainnet **Public RPCs (HTTPS)** `https://flare-api.flare.network/ext/C/rpc` `https://stylish-light-theorem.flare-mainnet.quiknode.pro/ext/bc/C/rpc` **Public RPCs (WSS)** `wss://flare-api.flare.network/ext/C/ws` `wss://stylish-light-theorem.flare-mainnet.quiknode.pro/ext/bc/C/ws` **Chain ID** `14` **Native currency** `FLR` (18 decimals) **Block Explorer** [`https://flare-explorer.flare.network`](https://flare-explorer.flare.network) **Systems Explorer** [`https://flare-systems-explorer.flare.network`](https://flare-systems-explorer.flare.network) **Faucet** \- **Bootstrapping nodes** `https://flare-bootstrap.flare.network` `https://flare-bootstrap-1.staking.production.figment.io` `https://flare.senseinode.com` **{Safe}Wallet** [`https://multisig.flare.network`](https://multisig.flare.network) RPC Connection code snippet ``` curl https://flare-api.flare.network/ext/C/rpc -X POST -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}' ``` ``` import { Web3 } from "web3";const web3 = new Web3("https://flare-api.flare.network/ext/C/rpc");web3.eth.getBlockNumber().then(console.log); ``` ``` from web3 import Web3w3 = Web3("https://flare-api.flare.network/ext/C/rpc")print(w3.eth.block_number) ``` ``` package flareimport ( "context" "fmt" "github.com/ethereum/go-ethereum/ethclient")func BlockNumber() { cl, _ := ethclient.Dial("https://flare-api.flare.network/ext/C/rpc") blockNumber, _ := cl.BlockNumber(context.Background()) fmt.Println(blockNumber)} ``` ``` use alloy::providers::{Provider, ProviderBuilder};use eyre::Result;#[tokio::main]async fn main() -> Result<()> { let provider = ProviderBuilder::new().connect_http("https://flare-api.flare.network/ext/C/rpc".parse()?); println!("{}", provider.get_block_number().await?); Ok(())} ``` Network name Flare Testnet Coston2 **Public RPCs (HTTPS)** `https://coston2-api.flare.network/ext/C/rpc` `https://falling-skilled-uranium.flare-coston2.quiknode.pro/ext/bc/C/rpc` **Public RPCs (WSS)** `wss://coston2-api.flare.network/ext/C/ws` `wss://falling-skilled-uranium.flare-coston2.quiknode.pro/ext/bc/C/ws` **Chain ID** `114` **Native currency** `C2FLR` (18 decimals) **Block Explorer** [`https://coston2-explorer.flare.network`](https://coston2-explorer.flare.network) **Systems Explorer** [`https://coston2-systems-explorer.flare.network`](https://coston2-systems-explorer.flare.network) **Faucet** Request C2FLR, FXRP, and USDT0 from [Coston2 Faucet](https://faucet.flare.network/coston2) **Bootstrapping nodes** `https://coston2-bootstrap.flare.network` RPC Connection code snippet ``` curl https://coston2-api.flare.network/ext/C/rpc -X POST -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}' ``` ``` import { Web3 } from "web3";const web3 = new Web3("https://coston2-api.flare.network/ext/C/rpc");web3.eth.getBlockNumber().then(console.log); ``` ``` from web3 import Web3w3 = Web3("https://coston2-api.flare.network/ext/C/rpc")print(w3.eth.block_number) ``` ``` package coston2import ( "context" "fmt" "github.com/ethereum/go-ethereum/ethclient")func BlockNumber() { cl, _ := ethclient.Dial("https://coston2-api.flare.network/ext/C/rpc") blockNumber, _ := cl.BlockNumber(context.Background()) fmt.Println(blockNumber)} ``` ``` use alloy::providers::{Provider, ProviderBuilder};use eyre::Result;#[tokio::main]async fn main() -> Result<()> { let provider = ProviderBuilder::new().connect_http("https://coston2-api.flare.network/ext/C/rpc".parse()?); println!("{}", provider.get_block_number().await?); Ok(())} ``` Network name Songbird Canary-Network **Public RPC (HTTPS)** `https://songbird-api.flare.network/ext/C/rpc` **Public RPC (WSS)** `wss://songbird-api.flare.network/ext/C/ws` **Chain ID** `19` **Native currency** `SGB` (18 decimals) **Block Explorer** [`https://songbird-explorer.flare.network`](https://songbird-explorer.flare.network) **Systems Explorer** [`https://songbird-systems-explorer.flare.network`](https://songbird-systems-explorer.flare.network) **Faucet** \- **Bootstrapping nodes** `https://songbird-bootstrap.flare.network` RPC Connection code snippet ``` curl https://songbird-api.flare.network/ext/C/rpc -X POST -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}' ``` ``` import { Web3 } from "web3";const web3 = new Web3("https://songbird-api.flare.network/ext/C/rpc");web3.eth.getBlockNumber().then(console.log); ``` ``` from web3 import Web3w3 = Web3("https://songbird-api.flare.network/ext/C/rpc")print(w3.eth.block_number) ``` ``` package songbirdimport ( "context" "fmt" "github.com/ethereum/go-ethereum/ethclient")func BlockNumber() { cl, _ := ethclient.Dial("https://songbird-api.flare.network/ext/C/rpc") blockNumber, _ := cl.BlockNumber(context.Background()) fmt.Println(blockNumber)} ``` ``` use alloy::providers::{Provider, ProviderBuilder};use eyre::Result;#[tokio::main]async fn main() -> Result<()> { let provider = ProviderBuilder::new() .connect_http("https://songbird-api.flare.network/ext/C/rpc".parse()?); println!("{}", provider.get_block_number().await?); Ok(())} ``` Network name Songbird Testnet Coston **Public RPC (HTTPS)** `https://coston-api.flare.network/ext/C/rpc` **Public RPC (WSS)** `wss://coston-api.flare.network/ext/C/ws` **Chain ID** `16` **Native currency** `CFLR` (18 decimals) **Block Explorer** [`https://coston-explorer.flare.network`](https://coston-explorer.flare.network) **Systems Explorer** [`https://coston-systems-explorer.flare.network`](https://coston-systems-explorer.flare.network) **Faucet** Request CFLR from [Coston Faucet](https://faucet.flare.network/coston) **Bootstrapping nodes** `https://coston-bootstrap.flare.network` RPC Connection code snippet ``` curl https://coston-api.flare.network/ext/C/rpc -X POST -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}' ``` ``` import { Web3 } from "web3";const web3 = new Web3("https://coston-api.flare.network/ext/C/rpc");web3.eth.getBlockNumber().then(console.log); ``` ``` from web3 import Web3w3 = Web3("https://coston-api.flare.network/ext/C/rpc")print(w3.eth.block_number) ``` ``` package costonimport ( "context" "fmt" "github.com/ethereum/go-ethereum/ethclient")func BlockNumber() { cl, _ := ethclient.Dial("https://coston-api.flare.network/ext/C/rpc") blockNumber, _ := cl.BlockNumber(context.Background()) fmt.Println(blockNumber)} ``` ``` use alloy::providers::{Provider, ProviderBuilder};use eyre::Result;#[tokio::main]async fn main() -> Result<()> { let provider = ProviderBuilder::new().connect_http("https://coston-api.flare.network/ext/C/rpc".parse()?); println!("{}", provider.get_block_number().await?); Ok(())} ``` ## API Resources[​](#api-resources "Direct link to API Resources") Resources for interacting with Flare's DA Layer and FDC verifiers. **DA Layer** [`https://flr-data-availability.flare.network/api-doc`](https://flr-data-availability.flare.network/api-doc) **FDC Verifier (EVM)** [`https://fdc-verifiers-mainnet.flare.network/verifier/api-doc`](https://fdc-verifiers-mainnet.flare.network/verifier/api-doc) **FDC Verifier (BTC)** [`https://fdc-verifiers-mainnet.flare.network/verifier/btc/api-doc`](https://fdc-verifiers-mainnet.flare.network/verifier/btc/api-doc) **FDC Verifier (XRP)** [`https://fdc-verifiers-mainnet.flare.network/verifier/xrp/api-doc`](https://fdc-verifiers-mainnet.flare.network/verifier/xrp/api-doc) **FDC Verifier (DOGE)** [`https://fdc-verifiers-mainnet.flare.network/verifier/doge/api-doc`](https://fdc-verifiers-mainnet.flare.network/verifier/doge/api-doc) **FDC Verifier (Web2Json)** [`https://fdc-verifiers-mainnet.flare.network/verifier/web2/api-doc`](https://fdc-verifiers-mainnet.flare.network/verifier/web2/api-doc) **DA Layer** [`https://ctn2-data-availability.flare.network/api-doc`](https://ctn2-data-availability.flare.network/api-doc) **FDC Verifier (EVM)** [`https://fdc-verifiers-testnet.flare.network/verifier/api-doc`](https://fdc-verifiers-testnet.flare.network/verifier/api-doc) **FDC Verifier (BTC)** [`https://fdc-verifiers-testnet.flare.network/verifier/btc_testnet4/api-doc`](https://fdc-verifiers-testnet.flare.network/verifier/btc_testnet4/api-doc) **FDC Verifier (XRP)** [`https://fdc-verifiers-testnet.flare.network/verifier/xrp/api-doc`](https://fdc-verifiers-testnet.flare.network/verifier/xrp/api-doc) **FDC Verifier (DOGE)** [`https://fdc-verifiers-testnet.flare.network/verifier/doge/api-doc`](https://fdc-verifiers-testnet.flare.network/verifier/doge/api-doc) **FDC Verifier (Web2Json)** [`https://fdc-verifiers-testnet.flare.network/verifier/web2/api-doc`](https://fdc-verifiers-testnet.flare.network/verifier/web2/api-doc) **DA Layer** [`https://sgb-data-availability.flare.network/api-doc`](https://sgb-data-availability.flare.network/api-doc) **FDC Verifier (EVM)** [`https://fdc-verifiers-mainnet.flare.network/verifier/api-doc`](https://fdc-verifiers-mainnet.flare.network/verifier/api-doc) **FDC Verifier (BTC)** [`https://fdc-verifiers-mainnet.flare.network/verifier/btc/api-doc`](https://fdc-verifiers-mainnet.flare.network/verifier/btc/api-doc) **FDC Verifier (XRP)** [`https://fdc-verifiers-mainnet.flare.network/verifier/xrp/api-doc`](https://fdc-verifiers-mainnet.flare.network/verifier/xrp/api-doc) **FDC Verifier (DOGE)** [`https://fdc-verifiers-mainnet.flare.network/verifier/doge/api-doc`](https://fdc-verifiers-mainnet.flare.network/verifier/doge/api-doc) **FDC Verifier (Web2Json)** [`https://fdc-verifiers-mainnet.flare.network/verifier/web2/api-doc`](https://fdc-verifiers-mainnet.flare.network/verifier/web2/api-doc) **DA Layer** [`https://ctn-data-availability.flare.network/api-doc`](https://ctn-data-availability.flare.network/api-doc) **FDC Verifier (EVM)** [`https://fdc-verifiers-testnet.flare.network/verifier/api-doc`](https://fdc-verifiers-testnet.flare.network/verifier/api-doc) **FDC Verifier (BTC)** [`https://fdc-verifiers-testnet.flare.network/verifier/btc_testnet4/api-doc`](https://fdc-verifiers-testnet.flare.network/verifier/btc_testnet4/api-doc) **FDC Verifier (XRP)** [`https://fdc-verifiers-testnet.flare.network/verifier/xrp/api-doc`](https://fdc-verifiers-testnet.flare.network/verifier/xrp/api-doc) **FDC Verifier (DOGE)** [`https://fdc-verifiers-testnet.flare.network/verifier/doge/api-doc`](https://fdc-verifiers-testnet.flare.network/verifier/doge/api-doc) **FDC Verifier (Web2Json)** [`https://fdc-verifiers-testnet.flare.network/verifier/web2/api-doc`](https://fdc-verifiers-testnet.flare.network/verifier/web2/api-doc) **API Keys:** - Public Verifier API key: `00000000-0000-0000-0000-000000000000` - For higher rate limits on the DA Layer raise an [API Key Request](https://github.com/flare-foundation/developer-hub/issues/new/choose) issue on GitHub. ## Supported wallets[​](#supported-wallets "Direct link to Supported wallets") A variety of wallets across desktop, browser extension, and mobile platforms support Flare. Discover suitable options for your needs on the [Flare Wallets](https://flare.network/wallets) page. ## Transaction format[​](#transaction-format "Direct link to Transaction format") - **Address space:** Matches Ethereum, 20-byte addresses using ECDSA. - **Transaction format:** Matches Ethereum, complies with [EIP-2718](https://eips.ethereum.org/EIPS/eip-2718), encoded with [RLP](https://ethereum.org/developers/docs/data-structures-and-encoding/rlp/). - **Transaction fees:** - **Type0** (Legacy) - Fee is calculated as `gasUsed * gasPrice`. - **Type2** (EIP-1559) - Fee is calculated as `(baseFee + priorityFee) * gas`. - In both cases, all transaction fees are burned. ## Smart contracts[​](#smart-contracts "Direct link to Smart contracts") - **Compatibility:** Fully EVM-compatible. Contracts written in Solidity, Vyper, or other EVM languages can be deployed directly. - **RPC-API:** [Ethereum RPC API](https://ethereum.org/developers/docs/apis/json-rpc/) - **Supported opcodes:** Supports all EVM [opcodes](https://www.evm.codes/?fork=cancun) up to and including the Cancun hard fork. ## Consensus mechanism[​](#consensus-mechanism "Direct link to Consensus mechanism") - **Consensus Protocol:** Snowman++ (from [Avalanche](https://build.avax.network/docs/primary-network)) provides a high-throughput, totally ordered consensus with fast finality. Learn more on the [Consensus](/network/consensus) page. - **Sybil resistance mechanism:** Proof-of-Stake (PoS) - **Delegation:** In-protocol - **Block time:** ≈1.8 seconds - **Finality:** Single-slot finality. Once a block is accepted through the consensus process (gossip), it's considered final. - **Transaction ordering:** Determined by the block proposer (leader), the default behavior is priority gas auction. - **Participants (Validators):** - Nodes must meet a [minimum self-bond requirement](https://proposals.flare.network/FIP/FIP_5.html) (defined by governance) to become validators. - Validators participate in consensus voting and are randomly selected as leaders to propose new blocks, weighted by their total stake (self-bond + delegated stake). - Validator count and stake distribution are viewable live on the [Flare Systems Explorer](https://flare-systems-explorer.flare.network/validators). - **Enshrined protocols:** In addition to consensus, Flare validators are also data providers for [FTSO](/ftso/overview) and [FDC](/fdc/overview). ## Block verification[​](#block-verification "Direct link to Block verification") - **Block Header Verification:** [Example Go implementation](https://github.com/flare-foundation/go-flare/blob/main/coreth/consensus/dummy/consensus.go). - **Block Body Validation:** [Example Go implementation](https://github.com/flare-foundation/go-flare/blob/main/coreth/core/block_validator.go). - **Verify transaction in block:** Verified using Merkle Patricia Trie proofs against the receipts root included in the block header. Adding Flare (FLR) to your exchange Integrating Flare is similar to integrating Ethereum or other EVM chains. To add it to your exchange set up an [RPC node](/run-node#rpc-node) and use the appropriate [network configuration](#configuration) for Flare Mainnet. Additional resources: [Flare Brand Kit](https://flare.network/media), [go-flare source code](https://github.com/flare-foundation/go-flare) ## Watch the video[​](#watch-the-video "Direct link to Watch the video")