Oracle Precompile

import { ethers } from 'ethers';
import { getOraclePrecompileEthersContract } from '@sei-js/precompiles/ethers';

const provider = new ethers.JsonRpcProvider('https://evm-rpc-testnet.sei-apis.com');
const oracleContract = getOraclePrecompileEthersContract(provider);

// Get current exchange rates
async function getCurrentPrices() {
  const exchangeRates = await oracleContract.getExchangeRates();
  
  return exchangeRates.map(rate => ({
    denom: rate.denom,
    price: parseFloat(rate.oracleExchangeRateVal.exchangeRate),
    lastUpdate: new Date(Number(rate.oracleExchangeRateVal.lastUpdateTimestamp) * 1000),
    lastUpdateString: rate.oracleExchangeRateVal.lastUpdate
  }));
}

// Get TWAP data
async function getTwapData(lookbackHours: number) {
  const lookbackSeconds = BigInt(lookbackHours * 3600);
  const twapData = await oracleContract.getOracleTwaps(lookbackSeconds);
  
  return twapData.map(twap => ({
    denom: twap.denom,
    price: parseFloat(twap.twap),
    lookbackHours: Number(twap.lookbackSeconds) / 3600
  }));
}

// Price monitoring function
async function monitorPriceChanges(denom: string, thresholdPercent: number = 5) {
  const [current, twap24h] = await Promise.all([
    getCurrentPrices(),
    getTwapData(24)
  ]);
  
  const currentPrice = current.find(p => p.denom === denom);
  const twapPrice = twap24h.find(p => p.denom === denom);
  
  if (currentPrice && twapPrice) {
    const change = Math.abs((currentPrice.price - twapPrice.price) / twapPrice.price * 100);
    
    if (change > thresholdPercent) {
      console.log(`⚠️ Price alert for ${denom}:`);
      console.log(`Current: ${currentPrice.price}`);
      console.log(`24h TWAP: ${twapPrice.price}`);
      console.log(`Change: ${change.toFixed(2)}%`);
    }
  }
}

import { 
  ORACLE_PRECOMPILE_ABI, 
  ORACLE_PRECOMPILE_ADDRESS 
} from '@sei-js/precompiles';

// Using with web3.js
import Web3 from 'web3';

const web3 = new Web3('https://evm-rpc-testnet.sei-apis.com');
const oracleContract = new web3.eth.Contract(
  ORACLE_PRECOMPILE_ABI,
  ORACLE_PRECOMPILE_ADDRESS
);

// Get current exchange rates
const exchangeRates = await oracleContract.methods
  .getExchangeRates()
  .call();

// Get TWAP data for 1 hour
const twapData = await oracleContract.methods
  .getOracleTwaps(3600)
  .call();

// Process the data
const prices = exchangeRates.map(rate => ({
  denom: rate.denom,
  price: parseFloat(rate.oracleExchangeRateVal.exchangeRate),
  timestamp: parseInt(rate.oracleExchangeRateVal.lastUpdateTimestamp)
}));