EIP-1559 なトランザクションを投げてみる

async function sendLegacyTx(wallet: Wallet) {
  return wallet.sendTransaction({
    to: wallet.address,
    type: 0,
  });
}

async function sendEIP1559Tx(wallet: Wallet) {
  return wallet.sendTransaction({
    to: wallet.address,
    // type が undefined だと 2 (EIP-1559) としてトランザクションが作成される
    // type: 2,
  });
}

async function sendLegacyTx(web3: Web3, account: Account) {
  const from = account.address;
  const to = account.address;
  const tx = await web3.eth.sendTransaction({
    from,
    to,
    gas: "21000",
  });

  return tx;
}

async function sendEIP1559Tx(web3: Web3, account: Account) {
  const from = account.address;
  const to = account.address;
  // sendTransaction の型定義が EIP-1559 に対応していないので as any 必須
  const tx = await web3.eth.sendTransaction({
    from,
    to,
    type: "0x2",
    gas: "21000",
  } as any);

  return tx;
}