Metamask: Uncaught (in promise) Error: Internal JSON-RPC error. { “code”: -32000, “message”: “Execution reverted”, “data”: “0x” }

Metamask Error: Uncaught Error (in promise): Internal JSON-RPC Error

Are you facing errors when interacting with a decentralized application (dApp) built on the Ethereum blockchain using MetaMask? Specifically, you are encountering an “Internal JSON-RPC Error” message. In this article, we will detail what is happening and provide steps to troubleshoot the issue.

What is JSON-RPC Error?

JSON-RPC is a protocol used to interact with decentralized applications (dApps) on the Ethereum blockchain. It allows developers to send data to smart contracts or interact with them programmatically using JavaScript libraries such as MetaMask.

Metamask Error: Uncaught Error (in promise): Internal JSON-RPC Error

When you try to call a function from a deployed contract, Metamask throws an “Internal JSON-RPC Error”. This error typically occurs when:

• The contract code does not support JSON-RPC.

• There is a problem with the transaction or subscription data.

• The contract has been rolled back or suspended.

Uncaught Error Message (in Promise)

The error message you provided indicates that there is a problem with the execution of the function being called from the deployed contract. Specifically:

• code: -32000

• message: “Execution rolled back”

• data: “0x” (suggesting the result of a transaction or call)

Troubleshooting Steps

• Check the contract code – Make sure that the deployed contract is written in Solidity and supports JSON-RPC. You can check this by using Remix IDE, Truffle Suite, or other tools to deploy the contract.

• Check transaction data

  

  – Make sure all required data (e.g. date) is included in the transaction or the result of the call. If there is a problem with the transaction signature or data structure, it can cause JSON-RPC errors.

• Check for rollbacks – When a function is called from a deployed contract, it can be rolled back due to various reasons, such as invalid code, insufficient funds, or gas limits. Make sure your contract has enough gas and the function does not have any conditional statements that can cause rollbacks.

Additional tips

• Use the console.log method in Remix to inspect the transaction data and the result of the call.

• Try calling a different function from the same contract to rule out specific issues.

• If you still have issues, consider upgrading MetaMask or switching to a newer version with improved JSON-RPC support.

By following these steps and troubleshooting techniques, you should be able to resolve your “JSON-RPC Internal Error” issue when interacting with contracts deployed on the Ethereum blockchain using Metamask. Happy coding!

Market Research Regulation