What does to way multi approval transaction?

Question

I am going to running swap transactions. At first, we are going to running an approval transaction. And then we are going to running a swap transaction. These repeat. I made the transaction data.

approval transaction data

var data = iface.encodeFunctionData('approve', [config[config.network].addresses.router, ethers.BigNumber.from("115792089237316195423570985008687907853269984665640564039457584007913129639935")]);

swap data....

....

repeat

I hope to have only one running an approval transaction.

for example

approval transaction
swap transaction
swap transaction
swap transaction
swap transaction
swap transaction

...

Do you have away?

Answer 1

If I understand what you're trying to do correctly, you should be fine since you are already approving the maximum uint. You can just call approve once and you should be able to swap that token as many times as you'd like.

If you want to swap multiple tokens, just approve them all in the same way before you start swapping.

Of course this is slightly less secure than approving only the required amount.