solana-improvement-documents/proposals/0138-deprecate-legacy-vote-instructions.md

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simd: '0138' title: Deprecate legacy vote instructions authors:

• Ashwin Sekar category: Standard type: Core status: Activated created: 2024-04-09 feature: 6Uf8S75PVh91MYgPQSHnjRAPQq6an5BDv9vomrCwDqLe ---

Summary

Disables the legacy Vote, UpdateVoteState and CompactUpdateVoteState instruction variants.

Motivation

These instructions are no longer sent by validator clients. It is cumbersome to support these old vote instructions and ensure parity.

Alternatives Considered

None

New Terminology

None

Detailed Design

When the features:

• deprecate legacy vote instructions, with key depVvnQ2UysGrhwdiwU42tCadZL8GcBb1i2GYhMopQv
• enable tower sync vote instruction, with key tSynMCspg4xFiCj1v3TDb4c7crMR5tSBhLz4sF7rrNA

are activated, the following instructions will result in an InvalidInstructionData error:

• Vote
• VoteSwitch
• UpdateVoteState
• UpdateVoteStateSwitch
• CompactUpdateVoteState
• CompactUpdateVoteStateSwitch

Enabling deprecate legacy vote instructions without enable tower sync vote instruction should have no effect.

Impact

Sending transactions that include the mentioned instructions will fail.

Security Considerations

None

Backwards Compatibility

Incompatible