RedStone

# npm
npm install @redstone-finance/sdk @redstone-finance/evm-connector

# yarn
yarn add @redstone-finance/sdk @redstone-finance/evm-connector

# pnpm
pnpm add @redstone-finance/sdk @redstone-finance/evm-connector

import { requestDataPackages, getSignersForDataServiceId } from '@redstone-finance/sdk';

async function fetchSEIPrice() {
  try {
    // Fetch data packages from RedStone DDL based on provided configuration
    const dataPackages = await requestDataPackages({
      // For production environment, "redstone-primary-prod" is the standard service
      dataServiceId: 'redstone-primary-prod',

      // Array of tokens to fetch - we're requesting SEI price data
      dataPackagesIds: ['SEI'],

      // Ensure minimum number of signers for each token
      // 'uniqueSignersCount' packages closest to median are returned
      // Throws error if there are fewer signers available
      uniqueSignersCount: 3,

      // (Optional) Wait time for gateway responses in milliseconds
      // Default: 500ms, here we set it to 1000ms for better reliability
      waitForAllGatewaysTimeMs: 1000,

      // (Optional) Filter out packages older than specified time
      // Here we accept packages up to 60 seconds old
      maxTimestampDeviationMS: 60 * 1000,

      // (Optional) Accept packages only from authorized signers
      // This provides additional security against man-in-the-middle attacks
      authorizedSigners: getSignersForDataServiceId('redstone-primary-prod'),

      // (Optional) Don't throw error for missing feeds
      // Useful when requesting multiple tokens where some might be unavailable
      ignoreMissingFeed: true
    });

    // Extract SEI price from the data package
    const seiPrice = dataPackages['SEI'][0].dataPackage.dataPoints[0]?.numericDataPointArgs.value;

    console.log('SEI price:', seiPrice);
    console.log('Full data package:', dataPackages['SEI'][0]);

    return {
      price: seiPrice,
      timestamp: dataPackages['SEI'][0].dataPackage.timestampMilliseconds,
      dataPackage: dataPackages['SEI'][0]
    };
  } catch (error) {
    console.error('Error fetching SEI price:', error);
    throw error;
  }
}

// Usage example
fetchSEIPrice()
  .then((result) => {
    console.log(`SEI Price: $${result.price}`);
    console.log(`Last Updated: ${new Date(result.timestamp)}`);
  })
  .catch((error) => {
    console.error('Failed to fetch price:', error);
  });