Receiver pay gas fee

Question

I'm creating a dapp and token (using openzeppelin). I just wonder how i can let the receiver pay the gas fee like pancakeswap or uniswap doing.

Dapp is create in nodejs / express JS.

Answer 1

You'll need web3 or ethers in order to do it.

Transactions always have to be signed by someone - unless you're using burner wallets. In this case, let the users sign the transaction!

WEB3 syntax (more in the documentation):

web3.eth.sendTransaction(transactionObject [, callback])

Ethers syntax (more in the documentation):

signer.sendTransaction({data});