Create datatoken with fixed pricing

This tutorial guides you through the process of creating your own data NFT and a datatoken with fixed pricing, using Ocean libraries. To know more about data NFTs and datatokens please refer this page. Ocean Protocol supports different pricing schemes which can be set while publishing an asset. Please refer this page for more details on pricing schemes.
Prerequisites
​Obtain an API key​
​Set up the .env file​
​Install the dependencies​
​Create a configuration file​
Create a script to deploy data NFT and datatoken with fixed pricing.
Create a new file in the same working directory where configuration file (config.py/config.js) and .env files are present, and copy the code as listed below.
Fees: The code snippets below define fees related parameters. Please refer fees page for more details
ocean.js
ocean.py
create_datatoken_with_fre.js
// Import dependencies
const { NftFactory, Datatoken } = require('@oceanprotocol/lib');
const Web3 = require('web3');
const { web3Provider, oceanConfig } = require('./config');
​
// Create a web3 instance
const web3 = new Web3(web3Provider);
​
// Define a function createFRE()
const createFRE = async () => {
  const Factory = new NftFactory(oceanConfig.erc721FactoryAddress, web3);
​
  // Get accounts from web3 instance
  const accounts = await web3.eth.getAccounts();
  const publisherAccount = accounts[0];
​
  // data NFT parameters: name, symbol, templateIndex, etc.
  const nftParams = {
    name: '72120Bundle',
    symbol: '72Bundle',
    templateIndex: 1,
    tokenURI: 'https://example.com',
    transferable: true,
    owner: publisherAccount
  };
  
  // datatoken parameters: name, symbol, templateIndex, etc.
  const erc20Params = {
    name: "Sample datatoken",
    symbol: "SDT",
    templateIndex: 1,
    cap: '100000',
    feeAmount: '0',
    // paymentCollector is the address
    paymentCollector: '0x0000000000000000000000000000000000000000',
    feeToken: '0x0000000000000000000000000000000000000000',
    minter: publisherAccount,
    mpFeeAddress: '0x0000000000000000000000000000000000000000'
  };
​
  const fixedPriceParams = {
    fixedRateAddress: oceanConfig.fixedRateExchangeAddress,
    baseTokenAddress: oceanConfig.oceanTokenAddress,
    owner: publisherAccount,
    marketFeeCollector: publisherAccount,
    baseTokenDecimals: 18,
    datatokenDecimals: 18,
    fixedRate: '100',
    marketFee: '0',
    // Optional parameters
    // allowedConsumer: publisherAccount,  //  only account that consume the exhchange
    withMint: false // add FixedPriced contract as minter if withMint == true
  }
​
  // Create data NFT and a datatoken with Fixed Rate exchange
  const result = await Factory.createNftErc20WithFixedRate(
    publisherAccount,
    nftParams,
    erc20Params,
    fixedPriceParams
  );
​
  // Get the data NFT address and datatoken address from the result
  const erc721Address = result.events.NFTCreated.returnValues[0];
  const datatokenAddress = result.events.TokenCreated.returnValues[0];
​
  return {
    erc721Address,
    datatokenAddress
  };
};
​
// Call the createFRE() function 
createFRE()
  .then(({ erc721Address, datatokenAddress }) => {
    console.log(`DataNft address ${erc721Address}`);
    console.log(`Datatoken address ${datatokenAddress}`);
    process.exit(1);
​
  })
  .catch((err) => {
    console.error(err);
    process.exit(1);
  });
Execute script
node create_datatoken_with_fre.js
create_datatoken_with_fre.py
# Note: Ensure that .env and config.py are correctly setup
from config import web3_wallet, ocean
​
data_nft = ocean.create_data_nft(
    name="NFTToken1",
    symbol="NFT1",
    from_wallet=web3_wallet,
    # Optional parameters
    token_uri="https://example.com",
    template_index=1,
    transferable=True,
    owner=web3_wallet.address,
)
print(f"Created dataNFT. Its address is {data_nft.address}")
​
# replace the addresses here
fee_manager = "0x0000000000000000000000000000000000000000"
publish_market_order_fee_address = "0x0000000000000000000000000000000000000000"
publish_market_order_fee_token = "0x0000000000000000000000000000000000000000"
minter = web3_wallet.address
​
# replace the fee amount
publish_market_order_fee_amount = 0
​
datatoken = data_nft.create_datatoken(
    name="Datatoken 1",
    symbol="DT1",
    datatoken_cap="100000",
    from_wallet=web3_wallet,
    # Ootional parameters below
    template_index=1,
    fee_manager=fee_manager,
    publish_market_order_fee_token=publish_market_order_fee_token,
    publish_market_order_fee_amount=publish_market_order_fee_amount,
    minter=minter,
    publish_market_order_fee_address=publish_market_order_fee_address,
)
print(f"Created datatoken. Its address is {datatoken.address}")
​
​
exchange_id = ocean.create_fixed_rate(
    datatoken=datatoken,
    base_token=ocean.OCEAN_token,
    amount=ocean.to_wei(100),
    from_wallet=web3_wallet,
)
​
print(f"Created fixed rate exchange with ID {exchange_id.hex()}")
Execute script
python create_datatoken_with_fre.py
Creating a data NFT
Mint datatokens
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