Web3 Actions से Node RPC कैसे access करें

type UniswapPair = {
  token0: string;
  token1: string;
  pair: string;
};

const USDC_PAIR_CONTRACT_ADDRESS = '0xb4e16d0168e52d35cacd2c6185b44281ec28c9dc';

export const onPairCreatedEventEmitted: ActionFn = async (context: Context, event: Event) => {
  try {
    const txEvent = event as TransactionEvent;
    const newPair = await getPairCreatedEvent(txEvent);

    const gatewayURL = context.gateways.getGateway(Network.MAINNET);
    const provider = new ethers.providers.JsonRpcProvider(gatewayURL);

    const usdcPairContract = await provider.getCode(USDC_PAIR_CONTRACT_ADDRESS);
    const newPairContract = await provider.getCode(newPair.pair);

    if (usdcPairContract === newPairContract) {
      const pairContracts = await context.storage.getJson('PairContracts');
      pairContracts[newPair.pair] = newPairContract;
      await context.storage.putJson('PairContracts', pairContracts);
    }
  } catch (error) {
    console.error(error);
  }
};

const getPairCreatedEvent = async (txEvent: TransactionEvent): Promise<UniswapPair> => {
  const i = new ethers.utils.Interface(UniswapV2FactoryAbi);
  const pairCreatedTopic = i.getEventTopic('PairCreated');

  const pairCreatedEventLog = txEvent.logs.find(log => {
    return log.topics.find(topic => topic == pairCreatedTopic) !== undefined;
  });

  if (pairCreatedEventLog == undefined) {
    throw Error('PairCreatedEvent missing');
  }

  return i.decodeEventLog(
    'PairCreated',
    pairCreatedEventLog.data,
    pairCreatedEventLog.topics,
  ) as unknown as UniswapPair;
};

account_id: ''
actions:
  YOUR_USERNAME/YOUR_PROJECT_SLUG:
    runtime: v2
    sources: actions
    specs:
      uniswapNewPair:
        description: Runs when a new pair is created on uniswap
        function: uniswapActions:onPairCreatedEventEmitted
        execution_type: parallel
        trigger:
          type: transaction
          transaction:
            status:
              - mined
            filters:
              - network: 1
                eventEmitted:
                  contract:
                    address: 0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f
                  name: PairCreated
project_slug: ''

const i = new ethers.utils.Interface(UniswapV2FactoryAbi);
const pairCreatedTopic = i.getEventTopic('PairCreated');

const pairCreatedEventLog = txEvent.logs.find(log => {
  return log.topics.find(topic => topic == pairCreatedTopic) !== undefined;
});

const gatewayURL = context.gateways.getGateway(Network.MAINNET);
const provider = new ethers.providers.JsonRpcProvider(gatewayURL);

const usdcPairContract = await provider.getCode(USDC_PAIR_CONTRACT_ADDRESS);
const newPairContract = await provider.getCode(newPair.pair);

if (usdcPairContract === newPairContract) {
  const pairContracts = await context.storage.getJson('PairContracts');
  pairContracts[newPair.pair] = newPairContract;
  await context.storage.putJson('PairContracts', pairContracts);
}