Ethereum: Using abigen with combined-json option generates nothing

Ethereum: Using Abigen with the option of combined JSON does not generate anything

As a developer who works on the projects associated with Ethereum, it is not uncommon to encounter problems when trying to generate binding with Abigen. In this article we will explore the problem and explore possible solutions.

Question:

You have encountered an unexpected behavior when trying to use the Abigen Command with the Combined-Json Option:

`

Abigen-Combined-Json Uniswapv2priceoracle.json-PKG ABI-TIPA UNISWAPV2-Out uniswapv2.Go

As expected, you did not encounter any mistakes about the error. However, the generated GO file does not contain the expected structure.

Solution:

To solve this problem, we first understand what is happening when we useAbigenwith a combined json:

• Optioncombined-json ‘tells Abigen to generate a JSON object that combines all the files listed in the entrance directory.

• When a combined JSON is used, a generated file contains references to individual files instead of a real code.

Why this happens:

Use the following command in your case:

`Bash

Abigen-Combined-Json Uniswapv2priceoracle.json-PKG ABI-TIPA UNISWAPV2-Out uniswapv2.Go

`

Theuniswapv2priceoracle.jsonfile is forwarded to the entrance to Abigen, but the command does not actually process it. Instead, a JSON object that contains references to this file will be generated.

How to fix:

To solve this problem, you must ensure that the output directory contains actual GO files instead of just references to other files. Here are some potential solutions:

• Moveuniswapv2priceoracle.jsonto the same directory as your main project:

If your project is structured as follows:

Bash

project/

Main.Go

Uniswapv2priceoracle.json

`

You can moveuniswapv2priceoracle.jsonto the same directory as your Main.GoFile:

Bash

ABIGEN UNISWAPV2PRICEOCLA.JSON -PKG ABI -TIPA UNISWAPV2 -OUT MAIN.GO

`

• Use a different output directory:

If you need to hold your project organized, you can determine the output directory for generated GO files:

Bash

ABIGEN-KOMBINED-JSON/PATH/DO/EXIT/Directory/Uniswapv2priceoracle.Json-PKG ABI-TIPA UNISWAPV2-Out Main.go

`

• Use Abigen with the second option option:

Instead of usingcombined -json, you can try to determine the option -Targetso you can tell Abigen what type of generation output:

Bash

ABIGEN -TARGET GO –PKG ABI -TYPE UNISWAPV2 UNISWAPV2PRICEOCLE.JSON

`

In this case, the generated GO file will contain one fileuniswapv2.Gowithout references.

Conclusion:

To solve the problem of creating anything when using Abigen with a combined JSON, ensure that the output directory contains actual GO files instead of just references to other files. You can repair this by movinguniswapv2priceoracle.json` to the same directory as your main project or using another output directory.

Following these steps, you should be able to generate a working connection for your Ethereum projects.

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