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Metamask: Ether.js works fine on desktop, but not with Metamask mobile app
As a Dapp developer, I have encountered several issues while using the popular Metamask plugin to interact with my Ethereum smart contract. In this article, I will share my experience in getting Metamask to work properly on both desktop and mobile devices.
Topic:
My problem started when I decided to use MetaMask on Android and iOS devices to connect to a Dapp network connection via the Ether.js library. At first, everything worked fine, but as soon as I installed the Metamask app on my Android or iOS device, I encountered an error.
Error:
The error message usually reads as follows:
`TypeError: Cannot read property ‘default’ of Undefined
or a similar variation depending on how MetaMask is configured in the Dapp network connection. This issue seems to occur even though the Ether.js library works fine on my desktop.
Solution:
After some trial and error, I found that this issue is caused by the way Metamask handles the “default” property of the Web3 provider object returned by Ether.js.
To resolve this issue, I have found two possible solutions:
- Use a different provider: One solution is to switch from using Ether.js directly with MetaMask to using another provider, such as Truffle.js or Hardhat. These libraries offer more control over the Web3 provider and may be less prone to errors related to the default property.
- Set the “defaultProvider” option in Ether.js: Another solution is to set the “defaultProvider” option in the Ether.js library itself, which can bypass any errors caused by the “default” property.
To enable these solutions, you need to modify your Dapp network connection code in one of the following ways:
Solution 1: Use a different provider (Truffle.js or Hardhat)
const Web3 = require('web3');
const ethers = require('ethers');
const provider = new ethers.providers.Web3Provider();
provider.setBlockchian('mainnet'); // Set the network provider
const contract = new ethers.Contract(contractaddress, abi);
Solution 2: Set the “defaultProvider” option in Ether.js
const Web3 = require('web3');
const ethers = require('ethers');
const provider = new ethers.providers.Web3Provider();
provider.setBlockchian('mainnet', {
defaultProvider: '
});
Conclusion:
While the Metamask application can still connect to the Dapp network via Ether.js, I have found two possible solutions that resolve this issue. These solutions require modifying the Dapp code in one of the ways above.
By implementing these solutions, you should be able to get MetaMask working properly on both desktop and mobile devices when connecting to your Ethereum smart contracts using Ether.js.
Note: These are only temporary workarounds and may not be the most effective solution. I recommend exploring other options to resolve this issue or consulting with a professional developer if necessary.