Ethereum: Getting error “Contract-transaction-hash=”” does not match provided contract-tx-hash=””

Ethereum Transaction Error: Contract Transaction Hash Does Not Match

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

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

What is a 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 against the Specified Contract-Tx-Hash Hash

To put things in 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 refers to the hash value of a transaction that was proposed or executed in another contract, but not in the current block.

Error Message

Given the context of your issue, there appear to be two distinct issues:

• The error message indicates an inconsistency between the specified contract-tx-hash and the txHash associated with the specific transaction.

• You also have issues with transactions for tokens like Matic and ZED.

Potential Solutions

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

Solution 1: Check the transaction hash

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

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

• Double-check that the transaction type and function call are correctly identified in your code.

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

Solution 2: Update the Ethereum client library

Another potential solution is to update your Ethereum client library to use the latest version. This may resolve any issues related to 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.

• Ensure you are using a supported version by checking the documentation for your specific library and protocol suite.

• Update your code to use the recommended txHash values.

Conclusion

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

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.

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