Coingecko

# .env file
COINGECKO_API_KEY=your_api_key_here
COINGECKO_API_TYPE=demo  # or 'pro'

// Configuration for both Demo and Pro APIs
const CONFIG = {
  demo: {
    baseUrl: 'https://api.coingecko.com/api/v3/onchain',
    headerKey: 'x-cg-demo-api-key',
    rateLimit: 30, // calls per minute
  },
  pro: {
    baseUrl: 'https://pro-api.coingecko.com/api/v3/onchain',
    headerKey: 'x-cg-pro-api-key',
    rateLimit: 500, // calls per minute (varies by plan)
  },
};

const apiType = process.env.COINGECKO_API_TYPE || 'demo';
const apiKey = process.env.COINGECKO_API_KEY;

const BASE_URL = CONFIG[apiType].baseUrl;
const HEADER_KEY = CONFIG[apiType].headerKey;

// Solana network identifier
const NETWORK = 'solana';

async function getTokenPrice(tokenAddress: string): Promise<number | null> {
  const url = `${BASE_URL}/simple/networks/${NETWORK}/token_price/${tokenAddress}`;

  const response = await fetch(url, {
    headers: {
      [HEADER_KEY]: apiKey,
      'Accept': 'application/json',
    },
  });

  if (!response.ok) {
    throw new Error(`API error: ${response.status}`);
  }

  const data = await response.json();
  return data.data?.attributes?.token_prices?.[tokenAddress] ?? null;
}

// Usage
const USDC = 'EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v';
const price = await getTokenPrice(USDC);
console.log(`USDC Price: $${price}`);

async function getTokenPrices(addresses: string[]): Promise<Record<string, TokenPriceData>> {
  const addressList = addresses.join(',');
  const url = `${BASE_URL}/simple/networks/${NETWORK}/token_price/${addressList}`;

  const params = new URLSearchParams({
    include_market_cap: 'true',
    include_24hr_vol: 'true',
    include_24hr_price_change: 'true',
  });

  const response = await fetch(`${url}?${params}`, {
    headers: { [HEADER_KEY]: apiKey },
  });

  const data = await response.json();
  return data.data?.attributes || {};
}

interface TokenData {
  address: string;
  name: string;
  symbol: string;
  decimals: number;
  image_url: string;
  price_usd: string;
  fdv_usd: string;
  market_cap_usd: string;
  total_supply: string;
  volume_usd: {
    h24: string;
  };
  price_change_percentage: {
    h24: string;
  };
}

async function getTokenData(address: string): Promise<TokenData> {
  const url = `${BASE_URL}/networks/${NETWORK}/tokens/${address}?include=top_pools`;

  const response = await fetch(url, {
    headers: { [HEADER_KEY]: apiKey },
  });

  const data = await response.json();
  return data.data?.attributes;
}

async function getMultipleTokens(addresses: string[]): Promise<TokenData[]> {
  const addressList = addresses.join(',');
  const url = `${BASE_URL}/networks/${NETWORK}/tokens/multi/${addressList}`;

  const response = await fetch(url, {
    headers: { [HEADER_KEY]: apiKey },
  });

  const data = await response.json();
  return data.data?.map((item: any) => item.attributes) || [];
}

interface PoolData {
  address: string;
  name: string;
  pool_created_at: string;
  base_token_price_usd: string;
  quote_token_price_usd: string;
  base_token_price_native_currency: string;
  fdv_usd: string;
  market_cap_usd: string;
  reserve_in_usd: string;
  price_change_percentage: {
    m5: string;
    h1: string;
    h6: string;
    h24: string;
  };
  transactions: {
    m5: { buys: number; sells: number };
    h1: { buys: number; sells: number };
    h24: { buys: number; sells: number };
  };
  volume_usd: {
    m5: string;
    h1: string;
    h6: string;
    h24: string;
  };
}

async function getPoolData(poolAddress: string): Promise<PoolData> {
  const url = `${BASE_URL}/networks/${NETWORK}/pools/${poolAddress}`;

  const params = new URLSearchParams({
    include: 'base_token,quote_token,dex',
  });

  const response = await fetch(`${url}?${params}`, {
    headers: { [HEADER_KEY]: apiKey },
  });

  const data = await response.json();
  return data.data?.attributes;
}

async function getTrendingPools(duration: '5m' | '1h' | '6h' | '24h' = '24h'): Promise<PoolData[]> {
  const url = `${BASE_URL}/networks/trending_pools`;

  const params = new URLSearchParams({
    include: 'base_token,quote_token,dex,network',
    duration,
    page: '1',
  });

  const response = await fetch(`${url}?${params}`, {
    headers: { [HEADER_KEY]: apiKey },
  });

  const data = await response.json();
  return data.data?.map((item: any) => item.attributes) || [];
}

// Filter for Solana pools
async function getSolanaTrendingPools(): Promise<PoolData[]> {
  const allPools = await getTrendingPools();
  return allPools.filter(pool => pool.network === 'solana');
}

async function getTopPools(page: number = 1): Promise<PoolData[]> {
  const url = `${BASE_URL}/networks/${NETWORK}/pools`;

  const params = new URLSearchParams({
    include: 'base_token,quote_token,dex',
    page: page.toString(),
  });

  const response = await fetch(`${url}?${params}`, {
    headers: { [HEADER_KEY]: apiKey },
  });

  const data = await response.json();
  return data.data?.map((item: any) => item.attributes) || [];
}

async function searchPools(query: string): Promise<PoolData[]> {
  const url = `${BASE_URL}/search/pools`;

  const params = new URLSearchParams({
    query,
    network: NETWORK,
    include: 'base_token,quote_token,dex',
  });

  const response = await fetch(`${url}?${params}`, {
    headers: { [HEADER_KEY]: apiKey },
  });

  const data = await response.json();
  return data.data?.map((item: any) => item.attributes) || [];
}

// Search for SOL pools
const solPools = await searchPools('SOL');

interface OHLCVData {
  timestamp: number;
  open: number;
  high: number;
  low: number;
  close: number;
  volume: number;
}

async function getPoolOHLCV(
  poolAddress: string,
  timeframe: 'day' | 'hour' | 'minute' = 'hour',
  aggregate: number = 1,
  limit: number = 100
): Promise<OHLCVData[]> {
  const url = `${BASE_URL}/networks/${NETWORK}/pools/${poolAddress}/ohlcv/${timeframe}`;

  const params = new URLSearchParams({
    aggregate: aggregate.toString(),
    limit: limit.toString(),
    currency: 'usd',
  });

  const response = await fetch(`${url}?${params}`, {
    headers: { [HEADER_KEY]: apiKey },
  });

  const data = await response.json();

  return data.data?.attributes?.ohlcv_list?.map((candle: number[]) => ({
    timestamp: candle[0],
    open: candle[1],
    high: candle[2],
    low: candle[3],
    close: candle[4],
    volume: candle[5],
  })) || [];
}

// Get hourly candles
const hourlyCandles = await getPoolOHLCV(poolAddress, 'hour', 1, 24);

// Get 5-minute candles
const fiveMinCandles = await getPoolOHLCV(poolAddress, 'minute', 5, 100);