spl-governance 4.0.0

Solana Program Library Governance Program
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74

//! Program state processor

use {
    crate::state::{
        enums::GovernanceAccountType,
        program_metadata::{
            get_program_metadata_data, get_program_metadata_seeds, ProgramMetadata,
        },
    },
    solana_program::{
        account_info::{next_account_info, AccountInfo},
        clock::Clock,
        entrypoint::ProgramResult,
        msg,
        pubkey::Pubkey,
        rent::Rent,
        sysvar::Sysvar,
    },
    spl_governance_tools::account::create_and_serialize_account_signed,
};

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

    let program_metadata_info = next_account_info(account_info_iter)?; // 0
    let payer_info = next_account_info(account_info_iter)?; // 1
    let system_info = next_account_info(account_info_iter)?; // 2

    let rent = Rent::get()?;
    let updated_at = Clock::get()?.slot;

    const VERSION: &str = env!("CARGO_PKG_VERSION");

    // Put the metadata info into the logs to make it possible to extract it using
    // Tx simulation
    msg!("PROGRAM-VERSION:{:?}", VERSION);

    if program_metadata_info.data_is_empty() {
        let program_metadata_data = ProgramMetadata {
            account_type: GovernanceAccountType::ProgramMetadata,
            updated_at,
            version: VERSION.to_string(),
            reserved: [0; 64],
        };

        create_and_serialize_account_signed(
            payer_info,
            program_metadata_info,
            &program_metadata_data,
            &get_program_metadata_seeds(),
            program_id,
            system_info,
            &rent,
            0,
        )?;
    } else {
        let mut program_metadata_data =
            get_program_metadata_data(program_id, program_metadata_info)?;

        program_metadata_data.version = VERSION.to_string();
        program_metadata_data.updated_at = updated_at;

        borsh::to_writer(
            &mut program_metadata_info.data.borrow_mut()[..],
            &program_metadata_data,
        )?;
    }

    Ok(())
}