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use anchor_lang::prelude::*;
use crate::errors::*;
use crate::id;
use crate::state::*;
use crate::utils::*;
#[derive(Accounts)]
pub struct ConfigTransactionExecute<'info> {
/// The multisig account that owns the transaction.
#[account(
mut,
seeds = [SEED_PREFIX, SEED_MULTISIG, multisig.create_key.as_ref()],
bump = multisig.bump,
)]
pub multisig: Box<Account<'info, Multisig>>,
/// One of the multisig members with `Execute` permission.
pub member: Signer<'info>,
/// The proposal account associated with the transaction.
#[account(
mut,
seeds = [
SEED_PREFIX,
multisig.key().as_ref(),
SEED_TRANSACTION,
&transaction.index.to_le_bytes(),
SEED_PROPOSAL,
],
bump = proposal.bump,
)]
pub proposal: Account<'info, Proposal>,
/// The transaction to execute.
#[account(
seeds = [
SEED_PREFIX,
multisig.key().as_ref(),
SEED_TRANSACTION,
&transaction.index.to_le_bytes(),
],
bump = transaction.bump,
)]
pub transaction: Account<'info, ConfigTransaction>,
/// The account that will be charged/credited in case the config transaction causes space reallocation,
/// for example when adding a new member, adding or removing a spending limit.
/// This is usually the same as `member`, but can be a different account if needed.
#[account(mut)]
pub rent_payer: Option<Signer<'info>>,
/// We might need it in case reallocation is needed.
pub system_program: Option<Program<'info, System>>,
// In case the transaction contains Add(Remove)SpendingLimit actions,
// `remaining_accounts` must contain the SpendingLimit accounts to be initialized/closed.
// remaining_accounts
}
impl<'info> ConfigTransactionExecute<'info> {
fn validate(&self) -> Result<()> {
let Self {
multisig,
proposal,
member,
..
} = self;
// member
require!(
multisig.is_member(member.key()).is_some(),
MultisigError::NotAMember
);
require!(
multisig.member_has_permission(member.key(), Permission::Execute),
MultisigError::Unauthorized
);
// proposal
match proposal.status {
ProposalStatus::Approved { timestamp } => {
require!(
Clock::get()?.unix_timestamp - timestamp >= i64::from(multisig.time_lock),
MultisigError::TimeLockNotReleased
);
}
_ => return err!(MultisigError::InvalidProposalStatus),
}
// Stale config transaction proposals CANNOT be executed even if approved.
require!(
proposal.transaction_index > multisig.stale_transaction_index,
MultisigError::StaleProposal
);
// `transaction` is validated by its seeds.
Ok(())
}
/// Execute the multisig transaction.
/// The transaction must be `Approved`.
#[access_control(ctx.accounts.validate())]
pub fn config_transaction_execute(ctx: Context<'_, '_, 'info, 'info, Self>) -> Result<()> {
let multisig = &mut ctx.accounts.multisig;
let transaction = &ctx.accounts.transaction;
let proposal = &mut ctx.accounts.proposal;
let rent = Rent::get()?;
// Execute the actions one by one.
for action in transaction.actions.iter() {
match action {
ConfigAction::AddMember { new_member } => {
multisig.add_member(new_member.to_owned());
multisig.invalidate_prior_transactions();
}
ConfigAction::RemoveMember { old_member } => {
multisig.remove_member(old_member.to_owned())?;
multisig.invalidate_prior_transactions();
}
ConfigAction::ChangeThreshold { new_threshold } => {
multisig.threshold = *new_threshold;
multisig.invalidate_prior_transactions();
}
ConfigAction::SetTimeLock { new_time_lock } => {
multisig.time_lock = *new_time_lock;
multisig.invalidate_prior_transactions();
}
ConfigAction::AddSpendingLimit {
create_key,
vault_index,
mint,
amount,
period,
members,
destinations,
} => {
let (spending_limit_key, spending_limit_bump) = Pubkey::find_program_address(
&[
SEED_PREFIX,
multisig.key().as_ref(),
SEED_SPENDING_LIMIT,
create_key.as_ref(),
],
ctx.program_id,
);
// Find the SpendingLimit account in `remaining_accounts`.
let spending_limit_info = ctx
.remaining_accounts
.iter()
.find(|acc| acc.key == &spending_limit_key)
.ok_or(MultisigError::MissingAccount)?;
// `rent_payer` and `system_program` must also be present.
let rent_payer = &ctx
.accounts
.rent_payer
.as_ref()
.ok_or(MultisigError::MissingAccount)?;
let system_program = &ctx
.accounts
.system_program
.as_ref()
.ok_or(MultisigError::MissingAccount)?;
// Initialize the SpendingLimit account.
create_account(
rent_payer,
spending_limit_info,
system_program,
&id(),
&rent,
SpendingLimit::size(members.len(), destinations.len()),
vec![
SEED_PREFIX.to_vec(),
multisig.key().as_ref().to_vec(),
SEED_SPENDING_LIMIT.to_vec(),
create_key.as_ref().to_vec(),
vec![spending_limit_bump],
],
)?;
let mut members = members.to_vec();
// Make sure members are sorted.
members.sort();
// Serialize the SpendingLimit data into the account info.
let spending_limit = SpendingLimit {
multisig: multisig.key().to_owned(),
create_key: create_key.to_owned(),
vault_index: *vault_index,
amount: *amount,
mint: *mint,
period: *period,
remaining_amount: *amount,
last_reset: Clock::get()?.unix_timestamp,
bump: spending_limit_bump,
members,
destinations: destinations.to_vec(),
};
spending_limit.invariant()?;
spending_limit
.try_serialize(&mut &mut spending_limit_info.data.borrow_mut()[..])?;
}
ConfigAction::RemoveSpendingLimit {
spending_limit: spending_limit_key,
} => {
// Find the SpendingLimit account in `remaining_accounts`.
let spending_limit_info = ctx
.remaining_accounts
.iter()
.find(|acc| acc.key == spending_limit_key)
.ok_or(MultisigError::MissingAccount)?;
// `rent_payer` must also be present.
let rent_payer = &ctx
.accounts
.rent_payer
.as_ref()
.ok_or(MultisigError::MissingAccount)?;
let spending_limit = Account::<SpendingLimit>::try_from(spending_limit_info)?;
// SpendingLimit must belong to the `multisig`.
require_keys_eq!(
spending_limit.multisig,
multisig.key(),
MultisigError::InvalidAccount
);
spending_limit.close(rent_payer.to_account_info())?;
// We don't need to invalidate prior transactions here because adding
// a spending limit doesn't affect the consensus parameters of the multisig.
}
ConfigAction::SetRentCollector { new_rent_collector } => {
multisig.rent_collector = *new_rent_collector;
// We don't need to invalidate prior transactions here because changing
// `rent_collector` doesn't affect the consensus parameters of the multisig.
}
}
}
// Make sure the multisig account can fit the updated state: added members or newly set rent_collector.
Multisig::realloc_if_needed(
multisig.to_account_info(),
multisig.members.len(),
ctx.accounts
.rent_payer
.as_ref()
.map(ToAccountInfo::to_account_info),
ctx.accounts
.system_program
.as_ref()
.map(ToAccountInfo::to_account_info),
)?;
// Make sure the multisig state is valid after applying the actions.
multisig.invariant()?;
// Mark the proposal as executed.
proposal.status = ProposalStatus::Executed {
timestamp: Clock::get()?.unix_timestamp,
};
Ok(())
}
}