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I'm trying to make a signed transaction in browser with web3 injected from metamask and send the transaction to my backend-server and then submit it to blockchain.

However, it's hard to find how I can just sign transaction(not sending it) and send it to my backend server.

Thanks for help

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  • Can you share more why you want to do so? Generally, once signed you cannot change it anyway.
    – turboza
    Commented Jul 27, 2021 at 12:00
  • @TurboPanumarch Probably he wants to pay the gas fees for the user
    – BonisTech
    Commented Feb 10, 2022 at 22:48
  • Any solution ? I want to do same thing over android mobile wallet
    – Jay Vyas
    Commented Apr 22, 2022 at 7:14

2 Answers 2

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You can refer the below for signing data from metamask,

https://docs.metamask.io/guide/signing-data.html#signing-data-with-metamask https://github.com/danfinlay/js-eth-personal-sign-examples

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  • 6
    Thanks but I'v already read it and it's about signing data not transaction.
    – fd asdf
    Commented Jul 28, 2021 at 1:54
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Yes, it is possible to sign transactions in the browser and send them to your backend server.

The web3.js library provides a method called eth_signTransaction which will allow you to sign the transaction and generate a signature.

You can then send the signed transaction to your backend server which can submit it to the blockchain.

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