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Ethereum Smart Agreement Error: Unexpected results with Eth_call

A recent meeting with the Ethereum network revealed the peculiar behavior of the Eth_call intellectual contract that resulted in unexpected results. In this article, we dive into detailed information about how this error happened and what it means to smart contract creators.

Question: Eth_Call with Get_DY feature

Ethereum: Calling Curve smart contracts with eth_call gives unexpected results

The error is caused by the function of the Eth_call to use a certain intellectual contract called “Get_DY”. The get_dy feature has an unexpected side effect, which will cause the wrong data to be returned from the contract.

Here’s a step by step what happened:

1

`Bash

Curl -x post -h “Content-tipe: Application/JSON”

`

2.

`Json

{

Contract_id: Curvepool,

Method: Get_DY,

For the days: [IT128, INT128, Uint256]

}

`

  • Get_DY feature : Get_DY feature is not designed to return any specific value; This simply calls the other method of the contract (binary program interface) method.

What happened

When Eth_Call was used with Get_Dy feature, occurred:

  • Counting Chain : ETH_CALALL initiated a back -ordered circuit according to both methods of contract.

  • Instead, he just returned the back -to -back circuit response.

  • Side Effect : But when using Get_DD, the back -to -call circuit is interrupted immediately after a method call. This means that all subsequent backlands are lost (including those caused by other methods).

Waiting behavior

With a normal scenario, the Get_DY feature will return an empty array or a specific value that shows success. However, using ETH_Call, this feature returns the back -to -call circuit response, which includes all errors that occur in the method calls.

Conclusion and Recommendations

This mistake emphasizes that it is important to carefully test the intellectual functions of the contract before installing them in the production environment. To avoid similar questions in the future:

  • Check both methods : Re -check that both methods of your contract do not return any specific values.

2.

3.

In the light of this error and taking the necessary precautions, intellectual contracts may ensure that their contracts are stable, reliable and match Ethereum guidelines.

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