My Hardhat Contract Suddenly Started Throwing A ‘Can’T Estimate Gas Error’ After Changing Nothing From A Previous Contract That Already Worked Mới Update

The error “can’t estimate gas” typically occurs when there is some sort of issue with the Ethereum node that you are connected to, or when there is a problem with your contract code that prevents the gas estimation algorithm from working properly.

Here are some potential reasons why this error might be occurring:

1. Network congestion: The Ethereum network can sometimes become congested, which can lead to slow transaction processing times and increased gas costs. If the network is currently experiencing high traffic, you may need to wait a while before trying to execute your contract again.

2. Insufficient gas limit: If the gas limit specified in your transaction is too low, the Ethereum node may not be able to estimate the amount of gas required to execute the transaction, resulting in the “can’t estimate gas” error. Try increasing the gas limit and see if this resolves the issue.

3. Contract issues: It’s possible that there is an issue with your contract code that is causing the gas estimation algorithm to fail. Check your code for any errors or bugs that may be causing this issue.

4. Outdated dependencies: Sometimes, an outdated or incompatible dependency can cause the gas estimation algorithm to fail. Try updating your dependencies to the latest versions and see if this resolves the issue.

5. Node issues: If the Ethereum node that you are connected to is experiencing issues, this can cause the gas estimation algorithm to fail. Try connecting to a different node and see if this resolves the issue.

In summary, the “can’t estimate gas” error can be caused by a variety of issues, including network congestion, insufficient gas limits, contract issues, outdated dependencies, and node issues. Try troubleshooting each of these potential causes to identify and resolve the issue.

When a smart contract transaction is executed on a blockchain network, the transaction requires gas to be used to pay for the computational resources required to execute the code. Gas is a unit of measurement for the computational effort required to execute a smart contract on the blockchain network.

If the gas runs out during the execution of a smart contract transaction, the transaction will fail and any changes made during the transaction will be reverted. This means that the state of the blockchain will return to its previous state before the transaction was initiated.

The transaction fee paid by the user is calculated based on the amount of gas used during the transaction, so if the gas runs out, the user will still be charged for the gas that was used up until the point of failure. This is because the network nodes that executed the transaction still had to use their computational resources to attempt to execute the transaction, even if it ultimately failed.

To prevent this from happening, it’s important to estimate the amount of gas required for a transaction before it is initiated. Users can specify a gas limit when sending a transaction to ensure that they do not run out of gas during execution. If the gas limit is set too low, the transaction may fail due to insufficient gas, so it’s important to estimate the gas required as accurately as possible.

The error message “Cannot estimate gas” typically appears in the context of interacting with a blockchain network, such as Ethereum.

When you send a transaction to a blockchain network, you need to specify the amount of gas you are willing to pay to execute that transaction. Gas is a unit of measurement for the computational work required to process and validate transactions on the blockchain.

The “Cannot estimate gas” error message usually means that the blockchain node or client you are using is unable to estimate how much gas is required to execute your transaction. This could be because the transaction is too complex or has too many variables that make it difficult to estimate the amount of gas required.

To resolve this issue, you may need to manually specify the amount of gas to use when sending your transaction. You can do this by adjusting the gas limit parameter in your transaction submission or using a different blockchain client that can estimate the gas required for your transaction.

An “out of gas” error is a type of error message that can occur in computer programs, particularly in systems that use smart contracts or decentralized applications on blockchain networks such as Ethereum.

In this context, “gas” refers to the amount of computational power required to execute a particular function or transaction on the network. Every operation on the Ethereum network requires a certain amount of gas, which must be paid for in Ethereum’s native currency, Ether.

When a transaction or contract execution runs out of gas, it means that the allotted computational power has been exhausted before the operation could be completed. This can happen if the gas limit for a transaction or contract is set too low, or if the code being executed is particularly complex and requires more gas than was originally estimated.

When an “out of gas” error occurs, the transaction or contract execution is terminated, and any changes made up to that point are rolled back. This helps to prevent incomplete or inconsistent transactions from being processed on the network.