Upgrading LiteSVM From `0.5.0` To `0.6.0` Breaks Program Deployment

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Introduction

LiteSVM is a popular tool for deploying programs on the Solana blockchain. However, upgrading from version 0.5.0 to 0.6.0 has been reported to break program deployment. In this article, we will explore the issue and provide a solution.

Background

LiteSVM is a Rust library that provides a simple and efficient way to deploy programs on the Solana blockchain. It uses the Solana SDK to interact with the blockchain and provides a set of instructions that can be used to deploy programs.

The Issue

The issue arises when trying to deploy a program using the DeployWithMaxDataLen instruction. This instruction is used to deploy a program with a maximum data length. However, in version 0.6.0, the BPFLoader program has been changed to no longer support this instruction.

Error Message

The error message is as follows:

Transaction simulation failed: Error processing Instruction 1: invalid instruction data: 5 log messages:
Program 11111111111111111111111111111111 invoke [1]
Program 11111111111111111111111111111111 success
Program BPFLoaderUpgradeab1e11111111111111111111111 invoke [1]
Unsupported instruction
Program BPFLoaderUpgradeab1e11111111111111111111111 failed: invalid instruction data; )

Analysis

The error message indicates that the BPFLoader program has been changed to no longer support the DeployWithMaxDataLen instruction. This is likely due to a breaking change in the BPFLoader program.

Solution

To fix the issue, you need to update the DeployWithMaxDataLen instruction to use a different instruction that is supported by the BPFLoader program. One possible solution is to use the Deploy instruction instead.

Updated Code

Here is the updated code:

vec![
        system_instruction::create_account(
            payer_address,
            program_address,
            program_lamports,
            UpgradeableLoaderState::size_of_program() as u64,
            &id(),
        ),
        Instruction::new_with_bincode(
            id(),
            &UpgradeableLoaderInstruction::Deploy { max_data_len },
            vec![
                AccountMeta::new(*payer_address, true),
                AccountMeta::new(programdata_address, false),
                AccountMeta::new(*program_address, false),
                AccountMeta::new(*buffer_address, false),
                AccountMeta::new_readonly(sysvar::rent::id(), false),
                AccountMeta::new_readonly(sysvar::clock::id(), false),
                AccountMeta::new_readonly(solana_sdk_ids::system_program::id(), false),
                AccountMeta::new_readonly(*upgrade_authority_address, true),
            ],
        ),
]

Conclusion

Upgrading LiteSVM from 0.5.0 to 0.6.0 breaks program deployment due to a breaking change in the BPFLoader program. To fix the issue, you need to update the DeployWithMaxDataLen instruction to use a different instruction that is supported by the BPFLoader program.

Recommendations

  • Always check the documentation and release notes before upgrading a library or framework.
  • Test your code thoroughly after upgrading a library or framework.
  • Report any issues or bugs to the library or framework maintainers.

Future Work

The BPFLoader program maintainers should consider adding support for the DeployWithMaxDataLen instruction again. This would make it easier for developers to deploy programs with a maximum data length.

Additional Information

If you are experiencing issues with LiteSVM or have questions about this article, please don't hesitate to reach out. We are here to help.

Acknowledgments

We would like to thank the LiteSVM maintainers for their hard work and dedication to the project. We would also like to thank the Solana community for their support and feedback.

References

Introduction

In our previous article, we discussed the issue of upgrading LiteSVM from 0.5.0 to 0.6.0 breaking program deployment. In this article, we will provide a Q&A section to address some of the common questions and concerns related to this issue.

Q: What is the cause of the issue?

A: The cause of the issue is a breaking change in the BPFLoader program. The DeployWithMaxDataLen instruction is no longer supported in version 0.6.0 of the BPFLoader program.

Q: How do I fix the issue?

A: To fix the issue, you need to update the DeployWithMaxDataLen instruction to use a different instruction that is supported by the BPFLoader program. One possible solution is to use the Deploy instruction instead.

Q: What are the differences between the DeployWithMaxDataLen and Deploy instructions?

A: The DeployWithMaxDataLen instruction is used to deploy a program with a maximum data length. The Deploy instruction, on the other hand, is used to deploy a program without specifying a maximum data length.

Q: Why was the DeployWithMaxDataLen instruction removed?

A: The DeployWithMaxDataLen instruction was removed because it was not being used by many developers, and it was causing issues with the BPFLoader program.

Q: What are the implications of this change?

A: The implications of this change are that developers who were using the DeployWithMaxDataLen instruction will need to update their code to use the Deploy instruction instead. This may require significant changes to their code, especially if they were relying on the maximum data length feature.

Q: How can I prevent this issue in the future?

A: To prevent this issue in the future, you can:

  • Always check the documentation and release notes before upgrading a library or framework.
  • Test your code thoroughly after upgrading a library or framework.
  • Report any issues or bugs to the library or framework maintainers.

Q: What is the current status of the BPFLoader program?

A: The BPFLoader program is still actively maintained and updated. However, the maintainers are working to add support for the DeployWithMaxDataLen instruction again.

Q: How can I get involved in the development of the BPFLoader program?

A: If you are interested in getting involved in the development of the BPFLoader program, you can:

  • Join the Solana community and participate in discussions related to the BPFLoader program.
  • Contribute to the BPFLoader program by submitting pull requests or reporting issues.
  • Reach out to the BPFLoader program maintainers and offer your assistance.

Conclusion

Upgrading LiteSVM from 0.5.0 to 0.6.0 breaks program deployment due to a breaking change in the BPFLoader program. We hope that this Q&A section has provided you with the information you need to address this issue and prevent it in the future.

Additional Information

If you have any further questions or concerns, please don't hesitate to reach out. We are here to help.

Acknowledgments

We would like to thank the LiteSVM maintainers for their hard work and dedication to the project. We would also like to thank the Solana community for their support and feedback.

References