by signing transactions with web3.py and metamk wallet using ethers.js
As part of a decentralized application, it is customary to require users to sign transactions with their metamask wallets. To facility this process, you will need to use an external wallet solution, such as ethereum.js (ethers.js) with the popular Web3. Py library.
In this article, we will study how to use metamask information from ethers.js to sign deals with web3.py.
Step 1: Install Addictions
First, make sure you have the necessary addictions installed:
`Bash
NPM Install Ether-Web3
`
Step 2: initialize ethers.js and web3.py
Create a New File for Your Dapp Initialization Code Like App.js:
`JavaScript
Const Web3 = ASK ('Web3');
Const ethers = ask ('ether/web3');
// initialize ethers.js
Const ethers = New Web3 (New Url ('
Replace ‘in your_ project_idwith your actual infura project id.
Step 3: Get User Metamask Information
For information on the user metamask, you will need to add their wallet with ethers.js using the method "ethers.connect () (). To simplify this process, you can use a library such as `Sincture ':
JavaScript
Const etherconnect = ask ('ether-ton-tonnection);
// Get the User's Metamask Wallet Address and Private Key
ethers.connect ({
Accounts: ['Your_Metamk_address'],
}, async (address, privateeke) => {
// use these credentials to sign transactions later with web3
});
Replace Your_Metamk_address with your actual metamask address.
Step 4: Sign Transaction Using Web3.Py
Now that you have information about user metamas, you can use them to sign transactions with web3.py. Create a New File for your Dapp Transaction Processing Code:
`JavaScript
Const Web3 = ASK ('Web3');
// Get a signed address from ethers.js connection
Async Function GetsignedDress (Address, Privatekey) {
Const Web3Instance = New Web3.Web3 ();
Return to wait web3Instance.eth.accounts.signTransaction ({
to: address,
Date: ', // You Can Use Your Transaction Information HERE
}, private key)
.Then ((signaturestx) => signedstx.rawtransaction)
.Then ((Signstxaw) => Signntx.Rawtransaction);
}
Module.exports = {GetSignedaddress};
This feature takes the user’s metamk address and private key as argument, creates a new web3 instance, signs the transaction with the information provided and returns the Raw Transaction.
putting it all
Here is an example of how you can use these features in your dapp:
`JavaScript
Const app = ask ('./ app');
// initialize ethers.js and web3
Request ('./ Initiators') (ether);
Const {Getsignaddress} = ask ('./ GetSignedaddress');
module.exports = async (req, res) => {
Const address = 'your_metamk_address';
Const Privatekey = 'Your_private_key';
// Get a signed Deal Using Web3.Py and Metamk Information
Const SIGNEDTX = Expect App.GetsinededDress (Address, Private Key);
// Send the signed transaction to ethers.js for checking
ethers.connect ({
Accounts: [Address],
}, async (account) => {
Const txhash = expectation.sendtransaction (Signingstx);
Console.log ("transaction sent to $ {txhash.address});
});
};
`
In this example, it is assumed that you have already initialized the “getsigneddress” feature in your dapp main file (‘app.js’). You can replace the Your_metamk_address and ‘Your_private_key` with actual metamk accreditation data.
Conclusion
When signing transactions with metamask wallets via ethers.js is a direct process that uses the web3.py transaction test. By doing these activities, you will be able to integrate your dapp with ethereum.js solutions like Web3.
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