Checking the user’s metamask portfolio address
When you use the Metamask API to authenticate users for your application, the verification that the portfolio address belongs to the user is crucial. In this article, we will explore how to get there.
Understand the Metamask API
Before diving into the verification process, let’s review the bases of the Metamask API:
- The termination point
Accounts” returns a list of available metamask portfolios.
- The termination pointGetaccount ‘recovers the details of the specific portfolio by address.
- The final point
Login 'authenticates users and returns an access token.
Verification of the portfolio address
To verify that the address of the portfolio of a user belongs to him, you will have to recover the details of his account using the termination pointGetaccount”. Once you have the details of the account, compare it with the expected address of the database or the storage system of your application.
Here is an example of how to recover an account by your address:
`Javascript
constant account = wait accounts.Getaccount (address);
'
Example of implementation
Javascript
async authenticateuseuser () {
Const Address = '0x1234567890abcdef'; // replaces by the user portfolio address
to try {
Const responsible = wait for fetch (' / api / ligin', {
Method: "post",
Headers: {
"Standard content": "application / json"
},
Body: JSON.STRINGIFY ({
"Address": address,
'Secretkey': 'your_secret_key_here' // replace with a secret key
})
});
Const Data = wait for response.json ();
if (data.error) {
launch a new error (data.error);
}
constant account = wait accounts.Getaccount (address);
console.log (Count details for the address $ {address}:);
Console.log (accountdata);
} Catch (error) {
Console.error (error);
}
}
'
In this example, we make a postal request to the termination point / API / Connection ‘with the address of the portfolio and the secret key of the user. The response will contain an accounts AccountingData” containing the details of the account.
Comparison of the property of the portfolio address
To verify that the portfolio address belongs to the user, compare it with the database or the storage system of your application. You can do so by recovering the account data and checking if the address provided corresponds to that expected.
Here is an example of implementation:
Javascript
async authenticateuseuser () {
Const Address = '0x1234567890abcdef'; // replaces by the user portfolio address
to try {
Const responsible = wait for fetch (' / api / ligin', {
Method: "post",
Headers: {
"Standard content": "application / json"
},
Body: JSON.STRINGIFY ({
"Address": address,
'Secretkey': 'your_secret_key_here' // replace with a secret key
})
});
Const Data = wait for response.json ();
if (data.error) {
launch a new error (data.error);
}
constant account = wait accounts.Getaccount (address);
Console.log (the portfolio address belongs to the user: $ {accountdata.address});
} Catch (error) {
Console.error (error);
}
}
`'
In this example, we make a postal request to the termination point / API / Connection ‘with the address of the portfolio and the secret key of the user. The response will contain an accounts `AccountingData” containing the details of the account. We then compare the address provided with that expected in the database or the storage system for your application.
Conclusion
Check that a user’s portfolio belongs to him using the Metamask API requires basic understanding of the termination point, authentication flow and comparison logic. By following this article and implementing the suggested code examples, you should be able to authenticate users for your application using Metamask and check that their wallet addresses belong to them.