spl-governance 4.0.0

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

use {
    crate::state::{
        proposal::get_proposal_data,
        proposal_transaction::get_proposal_transaction_data_for_proposal,
        token_owner_record::get_token_owner_record_data_for_proposal_owner,
    },
    solana_program::{
        account_info::{next_account_info, AccountInfo},
        entrypoint::ProgramResult,
        pubkey::Pubkey,
    },
    spl_governance_tools::account::dispose_account,
};

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

    let proposal_info = next_account_info(account_info_iter)?; // 0
    let token_owner_record_info = next_account_info(account_info_iter)?; // 1
    let governance_authority_info = next_account_info(account_info_iter)?; // 2

    let proposal_transaction_info = next_account_info(account_info_iter)?; // 3
    let beneficiary_info = next_account_info(account_info_iter)?; // 4

    let mut proposal_data = get_proposal_data(program_id, proposal_info)?;
    proposal_data.assert_can_edit_instructions()?;

    let token_owner_record_data = get_token_owner_record_data_for_proposal_owner(
        program_id,
        token_owner_record_info,
        &proposal_data.token_owner_record,
    )?;

    token_owner_record_data.assert_token_owner_or_delegate_is_signer(governance_authority_info)?;

    let proposal_transaction_data = get_proposal_transaction_data_for_proposal(
        program_id,
        proposal_transaction_info,
        proposal_info.key,
    )?;

    dispose_account(proposal_transaction_info, beneficiary_info)?;

    let option = &mut proposal_data.options[proposal_transaction_data.option_index as usize];
    option.transactions_count = option.transactions_count.checked_sub(1).unwrap();

    proposal_data.serialize(&mut proposal_info.data.borrow_mut()[..])?;

    Ok(())
}