Track New Tokens and Pairs

Monitoring for new tokens in the DeFi space is essential for discovering opportunities and building token discovery platforms. While you could monitor for token minting events, a more reliable approach is to track DEX pair creation events, as these indicate tokens that are actually being launched with liquidity.

tip

Pair creation events are more reliable indicators of new tokens than minting events because they indicate a token is being launched with actual trading liquidity.

Approach 1: Monitoring DEX Pair Creation

Uniswap V2 is one popular DEX protocols.

// Note: This is a sample ABI for Uniswap V2 Factory. Always verify the latest

const uniswapV2FactoryAbi = [
  {
    anonymous: false,
    inputs: [
      {
        indexed: true,
        internalType: "address",
        name: "token0",
        type: "address",
      },
      {
        indexed: true,
        internalType: "address",
        name: "token1",
        type: "address",
      },
      {
        indexed: false,
        internalType: "address",
        name: "pair",
        type: "address",
      },
      {
        indexed: false,
        internalType: "uint256",
        name: "",
        type: "uint256",
      },
    ],
    name: "PairCreated",
    type: "event",
  }
];


const options = {
  chains: [EvmChain.ETHEREUM], // Monitor on Ethereum
  description: "Track new Uniswap V2 pairs",
  tag: "uniswap_v2_pairs",
  abi: uniswapV2FactoryAbi,
  includeContractLogs: true,
  topic0: ["PairCreated(address,address,address,uint256)"],
  advancedOptions: [
    {
      topic0: "PairCreated(address,address,address,uint256)",
      includeNativeTxs: true,
    },
  ],
  webhookUrl: "https://YOUR_WEBHOOK_URL",
};

const stream = await Moralis.Streams.add(options);
const { id } = stream.toJSON();

// Attach the Uniswap V2 Factory address to the stream
// Verify factory addresses and ABIs from official sources, as they may change over time.
await Moralis.Streams.addAddress({
  id,
  address: "0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f", // Uniswap V2 Factory
});

Approach 2: Monitoring Multiple DEXes

To get comprehensive coverage, monitor multiple DEXes simultaneously:

const multiDexOptions = {
  chains: ["0x1", "0x38", "0x89"], // Ethereum, BSC, Polygon
  description: "Track pairs across multiple DEXes",
  tag: "multidex_pairs",
  abi: uniswapV2FactoryAbi, // Compatible with most V2-style DEXes
  includeContractLogs: true,
  topic0: ["PairCreated(address,address,address,uint256)"],
  advancedOptions: [
    {
      topic0: "PairCreated(address,address,address,uint256)",
      includeNativeTxs: true,
    },
  ],
  webhookUrl: "https://YOUR_WEBHOOK_URL",
};

const stream = await Moralis.Streams.add(multiDexOptions);
const { id } = stream.toJSON();

// Attach multiple factory addresses. 
// Verify the official DEX documentations to get the latest addresses.
const factories = [
  "0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f", // Uniswap V2
  "0xC0AEe478e3658e2610c5F7A4A2E1777cE9e4f2Ac", // SushiSwap
  "0xcA143Ce32Fe78f1f7019d7d551a6402fC5350c73", // PancakeSwap V2
  "0x5757371414417b8C6CAad45bAeF941aBc7d3Ab32", // QuickSwap
];

await Moralis.Streams.addAddress({
  id,
  address: factories,
});

Use Cases

This approach is perfect for:

• Token Discovery Platforms: Automatically discover and list new tokens
• DeFi Analytics: Track new token launches for market analysis
• Trading Bots: React to new token launches with liquidity
• Portfolio Trackers: Add new tokens to user portfolios automatically
• Security Monitoring: Monitor for potential scam tokens