# Make a volatility incentive > Make a volatility incentive using JS, Python, Rust, or Go. > 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/ftso/guides/make-volatility-incentive info Before reading this guide, make sure you understand [FTSOv2's Volatility Incentive Mechanism](/ftso/overview#volatility-incentive-mechanism). This guide provides code examples demonstrating how to make an FTSOv2 volatility incentive offer using various programming languages. To make a volatility incentive offer, you need three key pieces of information: 1. **RPC Endpoint URL:** The RPC Endpoint URL determines which network your code will interact with. You can use a node provider service or point to your [own RPC node](/run-node#rpc-node). A comprehensive list of public and private RPC endpoints for all Flare networks is available on the [Network Configuration](/network/overview#configuration) page. 2. **Contract Address:** The address for the `FastUpdateIncentiveManager` contract varies by network. You can obtain this address in two ways: - **From the Solidity Reference page:** Find the `FastUpdateIncentiveManager` address for each network on the [Solidity Reference](/ftso/solidity-reference) page. **OR** - **Query the FlareContractRegistry Contract:** The `FlareContractRegistry` contract has the same address across all networks. You can query it to get the `FastUpdateIncentiveManager` contract address. Refer to the specific language guides for examples: - [JavaScript](/network/guides/flare-for-javascript-developers#make-query) - [Python](/network/guides/flare-for-python-developers#make-query) - [Rust](/network/guides/flare-for-rust-developers#make-query) - [Go](/network/guides/flare-for-go-developers#make-query) 3. **Cost of Increasing the Sample Size:** FTSOv2 allows you to increase the sample size, i.e., the expected number of providers who can submit a block-latency feed update. The cost for this increases dynamically with the expected sample size. A single volatility incentive lasts for a period of 8 blocks. tip All examples in this guide are available at [developer-hub/examples](https://github.com/flare-foundation/developer-hub/tree/main/examples). This example uses [web3.js](https://github.com/web3/web3.js) to make an FTSOv2 volatility incentive offer on Flare Testnet Coston2. volatility\_incentive.js ``` // THIS IS EXAMPLE CODE. DO NOT USE THIS CODE IN PRODUCTION.import { Web3 } from "web3";import { interfaceToAbi } from "@flarenetwork/flare-periphery-contract-artifacts";// FastUpdatesIncentiveManager address (Flare Testnet Coston2)// See https://dev.flare.network/ftso/solidity-referenceconst INCENTIVE_ADDRESS = "0x58fb598EC6DB6901aA6F26a9A2087E9274128E59";const RPC_URL = "https://coston2-api.flare.network/ext/C/rpc";// ABI for FastUpdatesIncentiveManager contractconst abi = interfaceToAbi("IFastUpdateIncentiveManager", "coston2");async function main() { // Connect to an RPC node const w3 = new Web3(RPC_URL); const privateKey = process.env.ACCOUNT_PRIVATE_KEY.toString(); const wallet = w3.eth.accounts.wallet.add(privateKey); // Set up contract instance const incentive = new w3.eth.Contract(abi, INCENTIVE_ADDRESS); // Get the current sample size, sample size increase price, precision, and scale const sampleSizeIncreasePrice = await incentive.methods .getCurrentSampleSizeIncreasePrice() .call(); console.log( "Sample Size Increase Price: %i, Current Sample Size: %i, Current Precision %i, Current Scale %i", sampleSizeIncreasePrice, await incentive.methods.getExpectedSampleSize().call(), await incentive.methods.getPrecision().call(), await incentive.methods.getScale().call(), ); // Offer the incentive const tx = await incentive.methods .offerIncentive({ rangeIncrease: 0, rangeLimit: 0 }) .send({ from: wallet[0].address, nonce: await w3.eth.getTransactionCount(wallet[0].address), gasPrice: await w3.eth.getGasPrice(), value: sampleSizeIncreasePrice, }); console.log("Transaction hash:", tx.transactionHash); // Log the new sample size, precision, and scale console.log( "New Sample Size: %i, New Precision %i, New Scale %i", await incentive.methods.getExpectedSampleSize().call(), await incentive.methods.getPrecision().call(), await incentive.methods.getScale().call(), );}main(); ``` This example uses [ethers.js](https://github.com/ethers-io/ethers.js/) to make an FTSOv2 volatility incentive offer on Flare Testnet Coston2. volatility\_incentive.js ``` // THIS IS EXAMPLE CODE. DO NOT USE THIS CODE IN PRODUCTION.import { ethers } from "ethers";import { interfaceToAbi } from "@flarenetwork/flare-periphery-contract-artifacts";// FastUpdatesIncentiveManager address (Flare Testnet Coston2)// See https://dev.flare.network/ftso/solidity-referenceconst INCENTIVE_ADDRESS = "0x003e9bD18f73e0B25BED0DC8382Bde6aa999525c";const RPC_URL = "https://coston2-api.flare.network/ext/C/rpc";// ABI for FastUpdatesIncentiveManager contractconst abi = interfaceToAbi("IFastUpdateIncentiveManager", "coston2");async function main() { // Connect to an RPC node const provider = new ethers.JsonRpcProvider(RPC_URL); const privateKey = process.env.ACCOUNT_PRIVATE_KEY.toString(); const signer = new ethers.Wallet(privateKey, provider); // Set up contract instance const incentive = new ethers.Contract(INCENTIVE_ADDRESS, abi, signer); // Get the sample size increase price, sample size, precision, and scale const sampleSizeIncreasePrice = await incentive.getCurrentSampleSizeIncreasePrice(); console.log( "Sample Size Increase Price: %i, Current Sample Size: %i, Current Precision %i, Current Scale %i", sampleSizeIncreasePrice, await incentive.getExpectedSampleSize(), await incentive.getPrecision(), await incentive.getScale(), ); // Offer the incentive const tx = await incentive.offerIncentive( { rangeIncrease: 0, rangeLimit: 0 }, { nonce: await provider.getTransactionCount(signer.address), value: sampleSizeIncreasePrice, }, ); console.log("Transaction hash:", tx.hash); await tx.wait(); // Log the new sample size, precision, and scale console.log( "Current Sample Size: %i, Current Precision %i, Current Scale %i", await incentive.getExpectedSampleSize(), await incentive.getPrecision(), await incentive.getScale(), );}main(); ``` This example uses [web3.py](https://github.com/ethereum/web3.py) to make an FTSOv2 volatility incentive offer on Flare Testnet Coston2. volatility\_incentive.py ``` # THIS IS EXAMPLE CODE. DO NOT USE THIS CODE IN PRODUCTION.import asyncioimport osfrom web3 import AsyncHTTPProvider, AsyncWeb3# FastUpdatesIncentiveManager address (Flare Testnet Coston2)# See https://dev.flare.network/ftso/solidity-referenceINCENTIVE_ADDRESS = "0x003e9bD18f73e0B25BED0DC8382Bde6aa999525c"RPC_URL = "https://coston2-api.flare.network/ext/C/rpc"# ABI for FastUpdatesIncentiveManager contractABI = '[{"type":"constructor","stateMutability":"nonpayable","inputs":[{"type":"address","name":"_governanceSettings","internalType":"contract IGovernanceSettings"},{"type":"address","name":"_initialGovernance","internalType":"address"},{"type":"address","name":"_addressUpdater","internalType":"address"},{"type":"uint256","name":"_ss","internalType":"SampleSize"},{"type":"uint256","name":"_r","internalType":"Range"},{"type":"uint256","name":"_sil","internalType":"SampleSize"},{"type":"uint256","name":"_ril","internalType":"Range"},{"type":"uint256","name":"_x","internalType":"Fee"},{"type":"uint256","name":"_rip","internalType":"Fee"},{"type":"uint256","name":"_dur","internalType":"uint256"}]},{"type":"event","name":"DailyAuthorizedInflationSet","inputs":[{"type":"uint256","name":"authorizedAmountWei","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"GovernanceCallTimelocked","inputs":[{"type":"bytes4","name":"selector","internalType":"bytes4","indexed":false},{"type":"uint256","name":"allowedAfterTimestamp","internalType":"uint256","indexed":false},{"type":"bytes","name":"encodedCall","internalType":"bytes","indexed":false}],"anonymous":false},{"type":"event","name":"GovernanceInitialised","inputs":[{"type":"address","name":"initialGovernance","internalType":"address","indexed":false}],"anonymous":false},{"type":"event","name":"GovernedProductionModeEntered","inputs":[{"type":"address","name":"governanceSettings","internalType":"address","indexed":false}],"anonymous":false},{"type":"event","name":"IncentiveOffered","inputs":[{"type":"uint24","name":"rewardEpochId","internalType":"uint24","indexed":true},{"type":"uint256","name":"rangeIncrease","internalType":"Range","indexed":false},{"type":"uint256","name":"sampleSizeIncrease","internalType":"SampleSize","indexed":false},{"type":"uint256","name":"offerAmount","internalType":"Fee","indexed":false}],"anonymous":false},{"type":"event","name":"InflationReceived","inputs":[{"type":"uint256","name":"amountReceivedWei","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"InflationRewardsOffered","inputs":[{"type":"uint24","name":"rewardEpochId","internalType":"uint24","indexed":true},{"type":"tuple[]","name":"feedConfigurations","internalType":"struct IFastUpdatesConfiguration.FeedConfiguration[]","indexed":false,"components":[{"type":"bytes21","name":"feedId","internalType":"bytes21"},{"type":"uint32","name":"rewardBandValue","internalType":"uint32"},{"type":"uint24","name":"inflationShare","internalType":"uint24"}]},{"type":"uint256","name":"amount","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"TimelockedGovernanceCallCanceled","inputs":[{"type":"bytes4","name":"selector","internalType":"bytes4","indexed":false},{"type":"uint256","name":"timestamp","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"TimelockedGovernanceCallExecuted","inputs":[{"type":"bytes4","name":"selector","internalType":"bytes4","indexed":false},{"type":"uint256","name":"timestamp","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"advance","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"cancelGovernanceCall","inputs":[{"type":"bytes4","name":"_selector","internalType":"bytes4"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"dailyAuthorizedInflation","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"executeGovernanceCall","inputs":[{"type":"bytes4","name":"_selector","internalType":"bytes4"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"fastUpdater","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"contract IFastUpdatesConfiguration"}],"name":"fastUpdatesConfiguration","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"contract IIFlareSystemsManager"}],"name":"flareSystemsManager","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"_addressUpdater","internalType":"address"}],"name":"getAddressUpdater","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"Scale"}],"name":"getBaseScale","inputs":[]},{"type":"function","stateMutability":"pure","outputs":[{"type":"string","name":"","internalType":"string"}],"name":"getContractName","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"Fee"}],"name":"getCurrentSampleSizeIncreasePrice","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"getExpectedBalance","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"SampleSize"}],"name":"getExpectedSampleSize","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"getIncentiveDuration","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"getInflationAddress","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"Precision"}],"name":"getPrecision","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"Range"}],"name":"getRange","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"Scale"}],"name":"getScale","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"_lockedFundsWei","internalType":"uint256"},{"type":"uint256","name":"_totalInflationAuthorizedWei","internalType":"uint256"},{"type":"uint256","name":"_totalClaimedWei","internalType":"uint256"}],"name":"getTokenPoolSupplyData","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"governance","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"contract IGovernanceSettings"}],"name":"governanceSettings","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"initialise","inputs":[{"type":"address","name":"_governanceSettings","internalType":"contract IGovernanceSettings"},{"type":"address","name":"_initialGovernance","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"isExecutor","inputs":[{"type":"address","name":"_address","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"lastInflationAuthorizationReceivedTs","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"lastInflationReceivedTs","inputs":[]},{"type":"function","stateMutability":"payable","outputs":[],"name":"offerIncentive","inputs":[{"type":"tuple","name":"_offer","internalType":"struct IFastUpdateIncentiveManager.IncentiveOffer","components":[{"type":"uint256","name":"rangeIncrease","internalType":"Range"},{"type":"uint256","name":"rangeLimit","internalType":"Range"}]}]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"productionMode","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"Range"}],"name":"rangeIncreaseLimit","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"Fee"}],"name":"rangeIncreasePrice","inputs":[]},{"type":"function","stateMutability":"payable","outputs":[],"name":"receiveInflation","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"contract IIRewardManager"}],"name":"rewardManager","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"SampleSize"}],"name":"sampleIncreaseLimit","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setDailyAuthorizedInflation","inputs":[{"type":"uint256","name":"_toAuthorizeWei","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setIncentiveParameters","inputs":[{"type":"uint256","name":"_ss","internalType":"SampleSize"},{"type":"uint256","name":"_r","internalType":"Range"},{"type":"uint256","name":"_x","internalType":"Fee"},{"type":"uint256","name":"_dur","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setRangeIncreaseLimit","inputs":[{"type":"uint256","name":"_lim","internalType":"Range"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setRangeIncreasePrice","inputs":[{"type":"uint256","name":"_price","internalType":"Fee"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setSampleIncreaseLimit","inputs":[{"type":"uint256","name":"_lim","internalType":"SampleSize"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"switchToProductionMode","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"allowedAfterTimestamp","internalType":"uint256"},{"type":"bytes","name":"encodedCall","internalType":"bytes"}],"name":"timelockedCalls","inputs":[{"type":"bytes4","name":"selector","internalType":"bytes4"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"totalInflationAuthorizedWei","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"totalInflationReceivedWei","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"totalInflationRewardsOfferedWei","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"triggerRewardEpochSwitchover","inputs":[{"type":"uint24","name":"_currentRewardEpochId","internalType":"uint24"},{"type":"uint64","name":"_currentRewardEpochExpectedEndTs","internalType":"uint64"},{"type":"uint64","name":"_rewardEpochDurationSeconds","internalType":"uint64"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"updateContractAddresses","inputs":[{"type":"bytes32[]","name":"_contractNameHashes","internalType":"bytes32[]"},{"type":"address[]","name":"_contractAddresses","internalType":"address[]"}]}]' # noqa: E501async def main() -> None: # Connect to an RPC node w3 = AsyncWeb3( AsyncHTTPProvider(RPC_URL), ) private_key = os.getenv("ACCOUNT_PRIVATE_KEY") account = w3.eth.account.from_key(private_key) # Set up contract instance incentive = w3.eth.contract( address=w3.to_checksum_address(INCENTIVE_ADDRESS), abi=ABI ) # Get the current sample size, sample size increase price, precision, and scale sample_size_increase_price = ( await incentive.functions.getCurrentSampleSizeIncreasePrice().call() ) print( f"Sample Size Increase Price: {sample_size_increase_price}," f"Sample Size: {await incentive.functions.getExpectedSampleSize().call()}," f"Range: {await incentive.functions.getRange().call()}," f"Scale: {await incentive.functions.getScale().call()}," ) # Offer the incentive tx = await incentive.functions.offerIncentive( {"rangeIncrease": 0, "rangeLimit": 0} ).build_transaction( { "from": account.address, "nonce": await w3.eth.get_transaction_count(account.address), "gasPrice": await w3.eth.gas_price, "value": sample_size_increase_price, } ) signed_tx = w3.eth.account.sign_transaction(tx, private_key=private_key) tx_hash = await w3.eth.send_raw_transaction(signed_tx.raw_transaction) print("Transaction hash:", tx_hash.hex()) await w3.eth.wait_for_transaction_receipt(tx_hash) # Print the new sample size, precision, and scale print( f"Sample Size Increase Price: {sample_size_increase_price}," f"New Sample Size: {await incentive.functions.getExpectedSampleSize().call()}," f"New Range: {await incentive.functions.getRange().call()}," f"New Scale: {await incentive.functions.getScale().call()}," )if __name__ == "__main__": asyncio.run(main()) ``` This example uses [alloy-rs](https://github.com/ethereum/web3.py) to make an FTSOv2 volatility incentive offer on Flare Testnet Coston2. ``` cargo add alloy eyre tokio --features alloy/full,tokio/rt,tokio/rt-multi-thread,tokio/macros ``` volatility\_incentive.rs ``` // THIS IS EXAMPLE CODE. DO NOT USE THIS CODE IN PRODUCTION.use alloy::{ network::EthereumWallet, primitives::address, primitives::U256, providers::ProviderBuilder, signers::local::PrivateKeySigner, sol,};use eyre::Result;// Declare this manually to avoid some strange nested type errorssol! { #[sol(rpc)] interface FastUpdatesIncentiveManager { type SampleSize is uint256; type Range is uint256; type Fee is uint256; type Precision is uint256; type Scale is uint256; struct IncentiveOffer { Range rangeIncrease; Range rangeLimit; } constructor( address _governanceSettings, address _initialGovernance, address _addressUpdater, SampleSize _ss, Range _r, SampleSize _sil, Range _ril, Fee _x, Fee _rip, uint256 _dur ); function getCurrentSampleSizeIncreasePrice() external view returns (Fee); function getExpectedSampleSize() external view returns (SampleSize); function getRange() external view returns (Range); function getScale() external view returns (Scale); function offerIncentive(IncentiveOffer calldata _offer) external payable; }}#[tokio::main]async fn main() -> Result<()> { // Get private key from environment let private_key = std::env::var("ACCOUNT_PRIVATE_KEY")?; // FastUpdatesIncentiveManager address (Flare Testnet Coston2) // See https://dev.flare.network/ftso/solidity-reference let incentive_address = address!("d648e8ACA486Ce876D641A0F53ED1F2E9eF4885D"); // Set up wallet and provider let signer: PrivateKeySigner = private_key.parse().unwrap(); let wallet = EthereumWallet::from(signer.clone()); let provider = ProviderBuilder::new() .wallet(wallet) .connect_http("https://coston2-api.flare.network/ext/C/rpc".parse()?); // Set up contract instance let incentive = FastUpdatesIncentiveManager::new(incentive_address, provider); // Get the current sample size, sample size increase price, range, and scale let sample_size_increase_price = incentive.getCurrentSampleSizeIncreasePrice().call().await?; let expected_sample_size = incentive.getExpectedSampleSize().call().await?; let range = incentive.getRange().call().await?; let scale = incentive.getScale().call().await?; println!("Sample Size Increase Price: {sample_size_increase_price:?}"); println!("Current Sample Size: {expected_sample_size:?}"); println!("Current Range: {range:?}"); println!("Current Scale: {scale:?}"); // Offer the incentive let offer = FastUpdatesIncentiveManager::IncentiveOffer { rangeIncrease: U256::from(0), rangeLimit: U256::from(0), }; let tx_hash = incentive .offerIncentive(offer) .value(sample_size_increase_price) .send() .await? .watch() .await?; println!("Offer Incentive Tx Hash: {tx_hash:?}"); // Get the new sample size increase price, sample size, range, and scale let sample_size_increase_price = incentive.getCurrentSampleSizeIncreasePrice().call().await?; let exp_sample_size = incentive.getExpectedSampleSize().call().await?; let range = incentive.getRange().call().await?; let scale = incentive.getScale().call().await?; println!("Sample Size Increase Price: {sample_size_increase_price:?} "); println!("Current Sample Size: {exp_sample_size:?}"); println!("Current Range: {range:?}"); println!("Current Scale: {scale:?}"); Ok(())} ``` This example uses the Go API from [Geth](https://geth.ethereum.org) to make an FTSOv2 volatility incentive offer on Flare Testnet Coston2. ``` go get github.com/ethereum/go-ethereum/ethclientgo get github.com/ethereum/go-ethereum/accounts ``` The project structure should look like: ``` developer-hub-go/├── coston2/│ └── *.go├── flare/│ └── *.go├── main.go├── go.mod└── go.sum ``` With Go, you need to manually fetch the contract's ABI and generate the Go bindings. Copy the [FastUpdatesIncentiveManager ABI](https://api.routescan.io/v2/network/testnet/evm/114/etherscan/api?module=contract&action=getabi&address=0x003e9bD18f73e0B25BED0DC8382Bde6aa999525c&format=raw) and paste it into a file named `FastUpdatesIncentiveManager.abi`, located in the root of your project, i.e. same level as `go.mod`. Then using [abigen](https://geth.ethereum.org/docs/tools/abigen), generate the Go bindings. ``` abigen --abi FastUpdatesIncentiveManager.abi --pkg coston2 --type FastUpdatesIncentiveManager --out coston2/FastUpdatesIncentiveManager.go ``` coston2/volatility\_incentive.go ``` // THIS IS EXAMPLE CODE. DO NOT USE THIS CODE IN PRODUCTION.package coston2import ( "context" "fmt" "math/big" "os" "time" "github.com/ethereum/go-ethereum/accounts/abi/bind" "github.com/ethereum/go-ethereum/common" "github.com/ethereum/go-ethereum/crypto" "github.com/ethereum/go-ethereum/ethclient")func MakeVolatilityIncentive() { // Get private key from environment privateKey, _ := crypto.HexToECDSA(os.Getenv("ACCOUNT_PRIVATE_KEY")[2:]) // FastUpdatesIncentiveManager address (Flare Testnet Coston2) // See https://dev.flare.network/ftso/solidity-reference incentiveAddress := common.HexToAddress("0x003e9bD18f73e0B25BED0DC8382Bde6aa999525c") // Connect to an RPC node client, _ := ethclient.Dial("https://coston2-api.flare.network/ext/C/rpc") // Set up contract instance incentive, _ := NewFastUpdatesIncentiveManager(incentiveAddress, client) // Get the current sample size, sample size increase price, precision, and scale opts := &bind.CallOpts{Context: context.Background()} sampleSizeIncreasePrice, _ := incentive.GetCurrentSampleSizeIncreasePrice(opts) expectedSampleSize, _ := incentive.GetExpectedSampleSize(opts) rangeVal, _ := incentive.GetRange(opts) scale, _ := incentive.GetScale(opts) fmt.Println("Sample Size Increase Price:", sampleSizeIncreasePrice) fmt.Println("Current Sample Size:", expectedSampleSize) fmt.Println("Current Range:", rangeVal) fmt.Println("Current Scale:", scale) // Offer the incentive offer := IFastUpdateIncentiveManagerIncentiveOffer{ RangeIncrease: big.NewInt(0), RangeLimit: big.NewInt(0), } transactor, _ := bind.NewKeyedTransactorWithChainID(privateKey, big.NewInt(114)) transactor.Value = sampleSizeIncreasePrice tx, _ := incentive.OfferIncentive(transactor, offer) fmt.Println("Transaction hash:", tx.Hash().Hex()) time.Sleep(3000 * time.Millisecond) // Get the new sample size increase price, sample size, range, and scale sampleSizeIncreasePrice, _ = incentive.GetCurrentSampleSizeIncreasePrice(opts) expectedSampleSize, _ = incentive.GetExpectedSampleSize(opts) rangeVal, _ = incentive.GetRange(opts) scale, _ = incentive.GetScale(opts) fmt.Println("Sample Size Increase Price:", sampleSizeIncreasePrice) fmt.Println("Current Sample Size:", expectedSampleSize) fmt.Println("Current Range:", rangeVal) fmt.Println("Current Scale:", scale)} ```