Ethereum wallet not connecting

We will be using web3. A final note about this section: MetaMask injects web3. However, in my opinion, MetaMask offers today the best UX and simplest transition for regular users to explore dapps. As stated in the overview, we will forget about the blockchain.

We have a traditional Web 2. We will make one assumption: That all users visiting our front-end web page have MetaMask installed. With this assumption, we will show how a passwordless cryptographically-secure login flow works. Additionally, publicAddress needs to be unique. The signup process will also slightly differ, as publicAddress will be a required field on signup, if the user wishes to use a MetaMask login. Rest assured, the user will never need to type their publicAddress manually, since it can be fetched via web3.

Step 2: Generate Nonces Back-end For each user in the database, generate a random string in the nonce field. For example, nonce can be a big random integer. We can therefore call web3. When the user clicks on the login button, we fire an API call to the back end to retrieve the nonce associated with their public address.

Of course, since this is an unauthenticated API call, the back end should be configured to only show public information including nonce on this route. When she or he accepts it, the callback function will be called with the signed message called signature as an argument.

In particular it fetches the associated nonce. Having the nonce, the public address, and the signature, the back end can then cryptographically verify that the nonce has been correctly signed by the user. If this is the case, then the user has proven ownership of the public address, and we can consider her or him authenticated.

A JWT or session identifier can then be returned to the front end. Step 6: Change the Nonce Back-end To prevent the user from logging in again with the same signature in case it gets compromised , we make sure that the next time the same user wants to log in, she or he needs to sign a new nonce.

This is achieved by generating another random nonce for this user and persisting it to the database. This is how we manage a nonce-signing passwordless login flow. Why the Login Flow Works Authentication, by definition, is really only the proof of ownership of an account. To prevent the case where a hacker gets hold of one particular message and your signature of it but not your actual private key , we enforce the message to sign to be: Provided by the back end, and Regularly changing We changed it after each successful login in our explanation, but a timestamp-based mechanism could also be imagined.

I created a small demo app for the purpose of this article. It returns a JWT on successful authentication. React single-page application on the front-end. I try to use as few libraries as I can. I hope the code is simple enough so that you can easily port it to other tech stacks. The whole project can be seen in this GitHub repository. A demo is hosted here. We initialize nonce as a random big number. This number should be changed after each successful login.

I also added an optional username field here that the user would be able to change. A more rigorous implementation would add a validation function to check that all addresses here are valid Ethereum addresses. Step 2: Generate Nonces Back-end This is done in the defaultValue function in the model definition above. If no, create it. Then we check whether this publicAddress is already present or not on the back end.

We either retrieve it, if the user already exists, or if not, we create a new account in the handleSignup method. Select which wallet account you would like to connect to Immutable X, then click Next. If this is your first wallet, only one will be available to select as pictured below. Click New Account to create a new wallet.

Then, to confirm your account selection and complete the connection, click Connect. Immutable X Link will send a signature request to your wallet. Sign the request with your wallet, to authorize the connection and confirm your identity. A unique Immutable X Key will be created and registered to your Ethereum wallet.

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Rainbow Ethereum Wallet loads very slowly If Rainbow Ethereum Wallet is downloading very slowly, it could also be due to the size of the app itself. The progress bar gives you a slow download, but this may only appear because of the size of the app. In the event of an update, you can check in the respective app store how big the installation file is and see whether it may load for so long due to its size.

We have therefore put together a few possible solutions so that you can download the Rainbow Ethereum Wallet app without any problems. If you know of other possible solutions, we look forward to receiving a message from you at the end of this article. Check internet connection The reasons why Rainbow Ethereum Wallet cannot be loaded cannot be more different. In most cases it is due to your own internet connection. It is quite possible that your device is in a WiFi network, but it still does not work, so you should try to access a website on the Internet using your browser.

If you try to download the app via the mobile network which is not recommended because of the data consumption , then you should check how stable the mobile connection is. Perhaps your data volume has also been used up and is therefore only available slowly. It can also happen that a download from the mobile network is not possible due to your settings. On your PC or laptop running the electrum wallet, find the electrum data folder.

To find your Electrum files, try these instructions. Under the data folder, there should be a folder for certificates. Delete all the certificates and try connecting again. Try an Insecure Connection To connect directly to the Electrum server, try using port This will avoid the proxy that verifies the certificates.