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Metamask: Gas estimation errored with the following message (see below). Internal JSON-RPC error. { “code”: -32000, “message”: “execution reverted” }

Published by Terlumun Aondover on February 11th, 2025.

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Metamask Gas Estimation Error and Polygon Testnet Usage

As a user of the popular cryptocurrency wallet and browser extension MetaMask, you may have encountered gas estimation errors while transacting on the Ethereum network. In this article, we will explore the cause of these errors and provide instructions on how to use Polygon Testnet in MetaMask.

What is a gas estimation error?

A gas estimation error occurs when MetaMask calculates the gas required to complete a transaction, but the actual gas used in the transaction does not match. This can happen for a variety of reasons, such as:

Incorrect network settings or configuration

Incompatible wallet software or extensions

Insufficient funds in your account

Network congestion or high demand

Using Polygon Testnet with MetaMask

Polygon Testnet is a testing platform for Ethereum-based blockchain networks that allows developers to test and deploy smart contracts without risking real assets. When using Polygon Testnet in MetaMask, you must ensure that the following conditions are met:

Wallet Software: Make sure your MetaMask wallet software is updated to the latest version.

Network Settings: Verify that your Polygon account is connected to the testnet network by checking the “Testnet” section of your MetaMask settings.

Gas Limit: Set a reasonable gas limit for your transactions, considering the complexity of your code and the potential risks involved.

Error Message Analysis

The error message you provided { “code”: -32000, “message”: “execution reverted” } indicates an internal JSON-RPC error. This usually occurs when MetaMask is unable to execute the transaction due to a logical error or gas-related issue.

Troubleshooting Steps

To resolve gas estimation error and Polygon Testnet usage issues in MetaMask:

Check network settings: Verify that your Polygon account is connected to the testnet by checking the “Testnet” section of MetaMask settings.

Adjust gas limit:

Reduce the gas limit for your transactions to prevent excessive gas consumption.

Check transaction complexity: Optimize your smart contract code for better performance and reduce transaction complexity.

Clear MetaMask cache: Clear the MetaMask cache from time to time by closing the browser extension or restarting the wallet software.

Conclusion

Gas calculation errors can occur when using Polygon Testnet in MetaMask for various reasons, such as incorrect network settings, incompatible wallet software, or insufficient funds. By following these troubleshooting steps and verifying your testnet settings, you should be able to resolve these issues and successfully use Polygon Testnet with MetaMask.

Remember to always check the official Ethereum documentation and MetaMask updates for the latest information on gas estimation errors and using Polygon Testnet in the context of smart contract development.

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