Ethereum: “Contract-transaction-hash=”” error code does not match the specified contract-tx-hash=””.

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Ethereum Transaction Error: Contract-Transaction Hash Does Not Match

As a developer using the Protocol Kit to create, propose, and execute Ethereum transactions through your backend, you are experiencing an issue with a specific error message that prevents your application from processing certain types of transactions. Specifically, when you try to execute transactions on the Ethereum network for tokens like Matic and ZED, you get an error stating that “Contract-transaction-hash=…” does not match contract-tx-hash=…”

In this article, we’ll dive into the details of the issue and explore potential solutions to help you resolve it.

What is Transaction Hash?

Before we dive into the error message, let’s quickly understand what a transaction hash is. A transaction hash (txHash) is a unique string that represents the hash value of a transaction on the Ethereum network. It is used for various purposes, such as verifying the integrity of transactions and tracking transactions across different block heights.

Contract Transaction Hash vs. Provided Contract Transaction Hash

To put things into perspective, here are some key differences between the two hashes:

• Contract-transaction-hash (txHash): This is the hash value of a specific contract or function call on the Ethereum blockchain.

• Provided contract-tx-hash (txHash): This is the hash value of a transaction that was proposed or executed on another contract, but not on the current block.

The error message

Given the context of your issue, it seems that there are two separate issues:

• The error message indicates a mismatch between the provided contract transaction hash and the transaction hash associated with a specific transaction.

• You are also experiencing issues with transactions for tokens such as Matic and ZED.

Potential Solutions

To solve this problem, we will focus on two potential solutions:

Solution 1: Verify transaction hashes

First, let’s make sure you are using the correct transaction hash values. Here are some steps to verify your hashes:

• Make sure you are using the same contract address for all transactions.

• Check that the transaction type and function call are correctly identified in your code.

• If you are using a smart contract or library, check its documentation to make sure it is generating accurate txHash values.

Solution 2: Update your Ethereum client library

Another potential solution is to update your Ethereum client library to the latest version. This can resolve any issues with hash generation or compatibility with new versions of the protocol kit.

To update the client library:

• Install the latest version of the Ethereum client library using npm or yarn.

• Verify that you are running a compatible version by consulting the documentation for your specific library and protocol kit.

• Update your code to use the recommended txHash values.

Conclusion

The error message “Contract-transaction-hash=…” does not match the provided contract-tx-hash=”…” indicates an issue with the transaction hashes or the Ethereum blockchain itself. By verifying the transaction hashes, updating your Ethereum client library, and verifying the correctness of your smart contracts, you should be able to resolve this issue and continue processing transactions successfully.

If you are still having issues after implementing these solutions, please provide more details about your code and environment, and I will do my best to assist you further.