Metamask Configuration Issue with ERC1155 Contract URI
I am having an issue when importing a specific Metamask configuration using the contractURI field of an ERC1155 smart contract. Specifically, when trying to deploy and interact with an NFT on Testnet, I see that the “contractURI” is not being retrieved correctly, resulting in “untitled collection” being displayed instead of the expected URI.
Understanding Metamask Configuration
Before we get into this, let’s quickly review how Metamask configuration works. Contract configurations can be stored in a JSON file or as environment variables. The “contractURI” field is typically used to specify the location and address of the ERC1155 contract’s ABI. When deploying a smart contract on Testnet, Metamask automatically imports this information.
Troubleshooting Steps
Here are some of the steps I took to troubleshoot the issue.
- Check the contract URI in MetaMask: First, make sure you have set the contractURI field of your smart contract correctly. You can verify this by checking the MetaMask configuration page for your contract.
- Check the ERC1155 ABI and address: Double-check that you have copied the correct ERC1155 ABI and contract address. Make sure it matches what is stored in the contract file or as an environment variable.
- Testnet configuration file: Check that the “contractURI” field is set correctly in your Testnet configuration file (e.g. “.env.testnet”, “testnet.json”, etc.). This file contains the information needed for Metamask to retrieve and display the contract URI.
Example of a correct configuration
For example, if you have a JSON file named “contract_config.json” that contains:
{
"contractABI": {
"name": "Your contract name",
"address": "0xYourContractAddress"
},
"contractURI": "
}
You can save it in your .env.testnet file like this:
CONTRACT_ABI="{
'name': 'Your contract name',
'address': '0xYourContractAddress'
}"
CONTRACT_URI="
Conclusion
In conclusion, the problem of contractURI not loading correctly in Metamask when deploying a smart contract on the ERC1155 network Testnet can be be related to a misconfiguration. Be sure to check the contract field “contractURI” and make sure it matches what is stored as an environment variable or in a JSON file that matches your testnet settings.
By following these steps, you should be able to resolve this issue and display the expected contract URI when interacting with the smart contract on Testnet.