magicEdenParser.js

const solanaWeb3 = require('@solana/web3.js');

const rpc = "https://ssc-dao.genesysgo.net";
const magicEdenPubKey = new solanaWeb3.PublicKey("M2mx93ekt1fmXSVkTrUL9xVFHkmME8HTUi5Cyc5aF7K")
const solanaConnection = new solanaWeb3.Connection(rpc, 'confirmed');

const runMagicEdenParser = async () => {
  
  // get latest 1000 transactions happening on Magic Eden
  const magicEdenSignatures = await solanaConnection.getSignaturesForAddress(magicEdenPubKey);
  
  for (const { signature } of magicEdenSignatures) {
    const txn = await solanaConnection.getTransaction(signature)
    await MagicEdenOverlay(txn)
  }
}
runMagicEdenParser();


const WithdrawInstruction = 'Program log: Instruction: Withdraw';
const CancelOfferInstruction = 'Program log: Instruction: CancelBuy';
const ListingInstruction = 'Program log: Instruction: Sell';
const MakeOfferInstruction = 'Program log: Instruction: Buy';
const SaleInstruction = 'Program log: Instruction: Deposit';
const CancelListingInstruction = 'Program log: Instruction: CancelSell'

// TODO: add useful metadata for each event, this is just for identifying different cases
const MagicEdenOverlay = async (txn) => {
  const logs = txn.meta.logMessages;
  switch(logs[1]) {
  case WithdrawInstruction:
    console.log("this is a withdraw")
    break;
  case CancelOfferInstruction:
    console.log("this is a cancelled offer")
    break;
  case ListingInstruction:
    if (logs.length == 11) { console.log("this is a listing")}
    if (logs.length == 5) {console.log("this is an updated price on a listing")}
    if(logs.length == 41) { console.log("this is an accepted offer")}
    break;
  case MakeOfferInstruction:
    console.log("this is an offer made")
    break;
  case SaleInstruction:
    console.log("this is a sale")
    break;
  case CancelListingInstruction:
    console.log("this is a canceled listing") 
    break;
  default:
    console.log("unknown event")
  }
}