Bundle Transactions

Bundling transactions opens up a plathora of possibilities. We have listed a few of them as example:

1. Users won't have to do two transactions for approving an ERC20 token & then depositing it.
2. You can easily support depositing of any ERC20 in your app. Just add a transaction to swap user's token to your preffered token using any Dex.
3. Modular Contract designs, deploy only specific contract modules and then join them off-chain using a bundler transactions.

Single chain bundling

You must have initialised SDK & created a SCWProvider. We have exposed a function in a SCWSigner called sendTransactions using which you can send multiple transactions.

const scwSigner = scwProvider.getSigner();
const greeter = new ethers.Contract(
  GREETER_ADDR,
  GreeterArtifact.abi,
  scwSigner
);

const transactionData = greeter.interface.encodeFunctionData('addGreet');

const tx = await scwProvider.sendTransactions([
  {
    to: GREETER_ADDR,
    value: ethers.utils.parseEther('0.0001'),
    data: transactionData,
  },
  {
    to: GREETER_ADDR,
    value: ethers.utils.parseEther('0.0002'),
    data: transactionData,
  },
]);
console.log(tx);

Getting approval for ERC20 token & depositing together

await scwProvider.sendTransactions([
  {
    to: ERC20_TOKEN_ADDR,
    value: ethers.utils.parseEther('0.1'),
    data: TOKEN.interface.encodeFunctionData('approve', [
      spenderAddress,
      ethers.utils.parseEther(amount * 10), // getting approval from 10 times the amount to be spent
    ]),
  },
  {
    to: myContract.address,
    value: ethers.utils.parseEther('0.1'),
    data: myContract.interface.encodeFunctionData('stake', [
      ERC20_TOKEN_ADDR,
      ethers.utils.parseEther(amount),
    ]),
  },
]);

Cross chain bundling

info

Cross-chain Bundling will be coming soon, which will enable you to add bridging transactions to your transactions as well.