spl-governance 4.0.0

Solana Program Library Governance Program
Documentation 
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//! Program state processor

use {
    crate::{
        error::GovernanceError,
        state::governance::{
            assert_is_valid_governance_config, get_governance_data, GovernanceConfig,
        },
    },
    solana_program::{
        account_info::{next_account_info, AccountInfo},
        entrypoint::ProgramResult,
        pubkey::Pubkey,
    },
};

/// Processes SetGovernanceConfig instruction
pub fn process_set_governance_config(
    program_id: &Pubkey,
    accounts: &[AccountInfo],
    config: GovernanceConfig,
) -> ProgramResult {
    let account_info_iter = &mut accounts.iter();

    let governance_info = next_account_info(account_info_iter)?; // 0

    // Only governance PDA via a proposal can authorize change to its own config
    if !governance_info.is_signer {
        return Err(GovernanceError::GovernancePdaMustSign.into());
    };

    assert_is_valid_governance_config(&config)?;

    let mut governance_data = get_governance_data(program_id, governance_info)?;

    // Note: Config change leaves voting proposals in unpredictable state and it's
    // DAOs responsibility to ensure the changes are made when there are no
    // proposals in voting state For example changing approval quorum could
    // accidentally make proposals to succeed which would otherwise be defeated

    governance_data.config = config;

    governance_data.serialize(&mut governance_info.data.borrow_mut()[..])?;

    Ok(())
}