Error in the integration of Metamk: solving the mismatch named “Web3”
As a web3 developer, he is not just in finding problems with the resolution of the mismatch of names “web3”. This error is commonly found when the Metamask browser extension is used to connect its Ethereum wallet in web applications.
The error message “could not find the name ‘Web3′” or “Did we say ‘Web3’?” It suggests that MetamSk cannot determine whether we must use web3 or ‘web3as a web3.js supplier, a popular JavaScript library used to interact with the Ethereum block chain.
Causes of the problem
There are several reasons why this could be happening:
- Same of URL of the Verdador
: Be sure to have correctly provided the supplier's URL in its Metamask extension configuration.
- Infuraurl is not configured as a default supplier : If you are using the Infura web3 API3, make sure you are configured as your predetermined provider by clicking on the "Configuration" icon and selecting "predetermined provider".
- Infuraurl not correctly configured for web3.js : Make sure the infura web3 is correctly configured to use web3.js.
Solving the problem
To solve this problem, follow these steps:
- Check the UR of your supplier : Verify that you have provided the right infationa in its Metamask Extension settings.
- Verify the predetermined supplier selection : Make sure the infura web3 be selected as its default provider by clicking on the "Configuration" icon and selecting "default supplier".
- Update the supplier configuration for web3.js : If you use infura, make sure the supplier URL is correctly configured to use web3.js. You can do this by updating the variable 'Infuraurl in your code:
`JavaScript
const web3 = new web3 (new web3.providers.httpProvider ('
Replace‘your_project_id’with your real infura project ID.
- Try again : After making these changes, try to connect to the Ethereum Network and verify that we are usingweb3
as a supplier:
JavaScript
Console.log (web3.eth.net === '
`
If you still meet problems, provide more details about your code and configuration, and I will be happy to help you.