2022-08-15 11:41:46 -07:00
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//! Data shared between program runtime and built-in programs as well as SBF programs
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2021-12-27 09:49:32 -08:00
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2022-02-18 21:32:29 -08:00
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use {
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crate::{
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account::{AccountSharedData, ReadableAccount, WritableAccount},
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instruction::InstructionError,
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pubkey::Pubkey,
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rent::Rent,
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system_instruction::MAX_PERMITTED_DATA_LENGTH,
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},
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std::{
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cell::{RefCell, RefMut},
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collections::HashSet,
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pin::Pin,
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},
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};
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2021-12-27 09:49:32 -08:00
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pub type TransactionAccount = (Pubkey, AccountSharedData);
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2022-05-24 15:04:46 -07:00
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/// Contains account meta data which varies between instruction.
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///
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/// It also contains indices to other structures for faster lookup.
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#[derive(Clone, Debug)]
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pub struct InstructionAccount {
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/// Points to the account and its key in the `TransactionContext`
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pub index_in_transaction: usize,
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/// Points to the first occurrence in the parent `InstructionContext`
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///
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/// This excludes the program accounts.
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pub index_in_caller: usize,
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/// Points to the first occurrence in the current `InstructionContext`
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///
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/// This excludes the program accounts.
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pub index_in_callee: usize,
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/// Is this account supposed to sign
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pub is_signer: bool,
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/// Is this account allowed to become writable
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pub is_writable: bool,
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}
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/// Loaded transaction shared between runtime and programs.
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///
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/// This context is valid for the entire duration of a transaction being processed.
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#[derive(Debug)]
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pub struct TransactionContext {
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account_keys: Pin<Box<[Pubkey]>>,
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accounts: Pin<Box<[RefCell<AccountSharedData>]>>,
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account_touched_flags: RefCell<Pin<Box<[bool]>>>,
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instruction_context_capacity: usize,
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instruction_stack: Vec<usize>,
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instruction_trace: Vec<InstructionContext>,
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return_data: TransactionReturnData,
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accounts_resize_delta: RefCell<i64>,
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rent: Option<Rent>,
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}
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impl TransactionContext {
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/// Constructs a new TransactionContext
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pub fn new(
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transaction_accounts: Vec<TransactionAccount>,
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rent: Option<Rent>,
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instruction_context_capacity: usize,
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_number_of_instructions_at_transaction_level: usize,
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) -> Self {
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let (account_keys, accounts): (Vec<Pubkey>, Vec<RefCell<AccountSharedData>>) =
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transaction_accounts
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.into_iter()
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.map(|(key, account)| (key, RefCell::new(account)))
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.unzip();
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let account_touched_flags = vec![false; accounts.len()];
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Self {
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account_keys: Pin::new(account_keys.into_boxed_slice()),
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accounts: Pin::new(accounts.into_boxed_slice()),
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account_touched_flags: RefCell::new(Pin::new(account_touched_flags.into_boxed_slice())),
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instruction_context_capacity,
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instruction_stack: Vec::with_capacity(instruction_context_capacity),
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instruction_trace: Vec::new(),
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return_data: TransactionReturnData::default(),
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accounts_resize_delta: RefCell::new(0),
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rent,
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}
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}
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/// Used in mock_process_instruction
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pub fn deconstruct_without_keys(self) -> Result<Vec<AccountSharedData>, InstructionError> {
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if !self.instruction_stack.is_empty() {
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return Err(InstructionError::CallDepth);
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}
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Ok(Vec::from(Pin::into_inner(self.accounts))
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.into_iter()
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.map(|account| account.into_inner())
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.collect())
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}
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2022-07-15 00:31:34 -07:00
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/// Returns true if `enable_early_verification_of_account_modifications` is active
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pub fn is_early_verification_of_account_modifications_enabled(&self) -> bool {
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self.rent.is_some()
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}
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/// Returns the total number of accounts loaded in this Transaction
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pub fn get_number_of_accounts(&self) -> usize {
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self.accounts.len()
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}
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/// Searches for an account by its key
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pub fn get_key_of_account_at_index(
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&self,
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index_in_transaction: usize,
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) -> Result<&Pubkey, InstructionError> {
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self.account_keys
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.get(index_in_transaction)
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.ok_or(InstructionError::NotEnoughAccountKeys)
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}
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2022-03-21 05:53:32 -07:00
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/// Returns the keys for the accounts loaded in this Transaction
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pub fn get_keys_of_accounts(&self) -> &[Pubkey] {
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&self.account_keys
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}
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/// Searches for an account by its key
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pub fn get_account_at_index(
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&self,
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index_in_transaction: usize,
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) -> Result<&RefCell<AccountSharedData>, InstructionError> {
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self.accounts
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.get(index_in_transaction)
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.ok_or(InstructionError::NotEnoughAccountKeys)
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}
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/// Searches for an account by its key
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pub fn find_index_of_account(&self, pubkey: &Pubkey) -> Option<usize> {
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self.account_keys.iter().position(|key| key == pubkey)
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}
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/// Searches for a program account by its key
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pub fn find_index_of_program_account(&self, pubkey: &Pubkey) -> Option<usize> {
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self.account_keys.iter().rposition(|key| key == pubkey)
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}
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2022-08-20 02:20:47 -07:00
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/// Returns instruction trace length
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pub fn get_instruction_trace_length(&self) -> usize {
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self.instruction_trace.len()
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}
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/// Gets an InstructionContext by its index in the trace
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pub fn get_instruction_context_at_index_in_trace(
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&self,
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index_in_trace: usize,
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) -> Result<&InstructionContext, InstructionError> {
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self.instruction_trace
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.get(index_in_trace)
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.ok_or(InstructionError::CallDepth)
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}
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2022-04-12 17:52:47 -07:00
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/// Gets an InstructionContext by its nesting level in the stack
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pub fn get_instruction_context_at_nesting_level(
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&self,
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nesting_level: usize,
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) -> Result<&InstructionContext, InstructionError> {
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let index_in_trace = *self
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.instruction_stack
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.get(nesting_level)
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.ok_or(InstructionError::CallDepth)?;
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let instruction_context = self.get_instruction_context_at_index_in_trace(index_in_trace)?;
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debug_assert_eq!(instruction_context.nesting_level, nesting_level);
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Ok(instruction_context)
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}
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/// Gets the max height of the InstructionContext stack
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pub fn get_instruction_context_capacity(&self) -> usize {
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self.instruction_context_capacity
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}
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2022-02-02 16:45:57 -08:00
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/// Gets instruction stack height, top-level instructions are height
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/// `solana_sdk::instruction::TRANSACTION_LEVEL_STACK_HEIGHT`
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pub fn get_instruction_context_stack_height(&self) -> usize {
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self.instruction_stack.len()
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}
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/// Returns the current InstructionContext
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pub fn get_current_instruction_context(&self) -> Result<&InstructionContext, InstructionError> {
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let level = self
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.get_instruction_context_stack_height()
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.checked_sub(1)
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.ok_or(InstructionError::CallDepth)?;
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self.get_instruction_context_at_nesting_level(level)
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}
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/// Pushes a new InstructionContext
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pub fn push(
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&mut self,
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program_accounts: &[usize],
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instruction_accounts: &[InstructionAccount],
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instruction_data: &[u8],
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) -> Result<(), InstructionError> {
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let callee_instruction_accounts_lamport_sum =
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self.instruction_accounts_lamport_sum(instruction_accounts.iter())?;
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if !self.instruction_stack.is_empty()
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&& self.is_early_verification_of_account_modifications_enabled()
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{
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let caller_instruction_context = self.get_current_instruction_context()?;
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let original_caller_instruction_accounts_lamport_sum =
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caller_instruction_context.instruction_accounts_lamport_sum;
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let current_caller_instruction_accounts_lamport_sum = self
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.instruction_accounts_lamport_sum(
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caller_instruction_context.instruction_accounts.iter(),
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)?;
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if original_caller_instruction_accounts_lamport_sum
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!= current_caller_instruction_accounts_lamport_sum
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{
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return Err(InstructionError::UnbalancedInstruction);
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}
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}
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let instruction_context = InstructionContext::new(
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self.instruction_stack.len(),
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callee_instruction_accounts_lamport_sum,
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program_accounts.to_vec(),
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instruction_accounts.to_vec(),
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instruction_data.to_vec(),
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);
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let index_in_trace = self.instruction_trace.len();
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self.instruction_trace.push(instruction_context);
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if self.instruction_stack.len() >= self.instruction_context_capacity {
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return Err(InstructionError::CallDepth);
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}
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self.instruction_stack.push(index_in_trace);
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Ok(())
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}
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/// Pops the current InstructionContext
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pub fn pop(&mut self) -> Result<(), InstructionError> {
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if self.instruction_stack.is_empty() {
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return Err(InstructionError::CallDepth);
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}
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// Verify (before we pop) that the total sum of all lamports in this instruction did not change
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let detected_an_unbalanced_instruction =
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if self.is_early_verification_of_account_modifications_enabled() {
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self.get_current_instruction_context()
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.and_then(|instruction_context| {
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// Verify all executable accounts have no outstanding refs
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for account_index in instruction_context.program_accounts.iter() {
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self.get_account_at_index(*account_index)?
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.try_borrow_mut()
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.map_err(|_| InstructionError::AccountBorrowOutstanding)?;
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}
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self.instruction_accounts_lamport_sum(
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instruction_context.instruction_accounts.iter(),
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)
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.map(|instruction_accounts_lamport_sum| {
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instruction_context.instruction_accounts_lamport_sum
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!= instruction_accounts_lamport_sum
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})
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2022-08-20 02:20:47 -07:00
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})
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} else {
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Ok(false)
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};
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// Always pop, even if we `detected_an_unbalanced_instruction`
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self.instruction_stack.pop();
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2022-07-15 00:31:34 -07:00
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if detected_an_unbalanced_instruction? {
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Err(InstructionError::UnbalancedInstruction)
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} else {
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Ok(())
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}
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2021-12-27 09:49:32 -08:00
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}
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/// Gets the return data of the current InstructionContext or any above
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pub fn get_return_data(&self) -> (&Pubkey, &[u8]) {
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(&self.return_data.program_id, &self.return_data.data)
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}
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/// Set the return data of the current InstructionContext
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2022-01-10 09:26:51 -08:00
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pub fn set_return_data(
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&mut self,
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program_id: Pubkey,
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data: Vec<u8>,
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) -> Result<(), InstructionError> {
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2022-03-22 15:17:05 -07:00
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self.return_data = TransactionReturnData { program_id, data };
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2021-12-27 09:49:32 -08:00
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Ok(())
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}
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2022-01-19 13:40:09 -08:00
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2022-07-15 00:31:34 -07:00
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/// Calculates the sum of all lamports within an instruction
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2022-08-20 02:20:47 -07:00
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fn instruction_accounts_lamport_sum<'a, I>(
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&'a self,
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|
|
instruction_accounts: I,
|
|
|
|
) -> Result<u128, InstructionError>
|
|
|
|
where
|
|
|
|
I: Iterator<Item = &'a InstructionAccount>,
|
|
|
|
{
|
2022-07-15 00:31:34 -07:00
|
|
|
if !self.is_early_verification_of_account_modifications_enabled() {
|
|
|
|
return Ok(0);
|
|
|
|
}
|
|
|
|
let mut instruction_accounts_lamport_sum: u128 = 0;
|
2022-08-20 02:20:47 -07:00
|
|
|
for (instruction_account_index, instruction_account) in instruction_accounts.enumerate() {
|
2022-07-15 00:31:34 -07:00
|
|
|
if instruction_account_index != instruction_account.index_in_callee {
|
|
|
|
continue; // Skip duplicate account
|
|
|
|
}
|
|
|
|
instruction_accounts_lamport_sum = (self
|
|
|
|
.get_account_at_index(instruction_account.index_in_transaction)?
|
|
|
|
.try_borrow()
|
|
|
|
.map_err(|_| InstructionError::AccountBorrowOutstanding)?
|
|
|
|
.lamports() as u128)
|
|
|
|
.checked_add(instruction_accounts_lamport_sum)
|
|
|
|
.ok_or(InstructionError::ArithmeticOverflow)?;
|
|
|
|
}
|
|
|
|
Ok(instruction_accounts_lamport_sum)
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Returns the accounts resize delta
|
|
|
|
pub fn accounts_resize_delta(&self) -> Result<i64, InstructionError> {
|
|
|
|
self.accounts_resize_delta
|
|
|
|
.try_borrow()
|
|
|
|
.map_err(|_| InstructionError::GenericError)
|
|
|
|
.map(|value_ref| *value_ref)
|
|
|
|
}
|
2022-02-02 16:45:57 -08:00
|
|
|
}
|
|
|
|
|
2022-03-22 15:17:05 -07:00
|
|
|
/// Return data at the end of a transaction
|
2022-05-22 18:00:42 -07:00
|
|
|
#[derive(Clone, Debug, Default, Deserialize, PartialEq, Eq, Serialize)]
|
2022-03-22 15:17:05 -07:00
|
|
|
pub struct TransactionReturnData {
|
|
|
|
pub program_id: Pubkey,
|
|
|
|
pub data: Vec<u8>,
|
|
|
|
}
|
|
|
|
|
2021-12-27 09:49:32 -08:00
|
|
|
/// Loaded instruction shared between runtime and programs.
|
|
|
|
///
|
|
|
|
/// This context is valid for the entire duration of a (possibly cross program) instruction being processed.
|
2022-02-02 16:45:57 -08:00
|
|
|
#[derive(Debug, Clone)]
|
2021-12-27 09:49:32 -08:00
|
|
|
pub struct InstructionContext {
|
2022-02-09 11:04:49 -08:00
|
|
|
nesting_level: usize,
|
2022-07-15 00:31:34 -07:00
|
|
|
instruction_accounts_lamport_sum: u128,
|
2021-12-30 06:46:36 -08:00
|
|
|
program_accounts: Vec<usize>,
|
|
|
|
instruction_accounts: Vec<InstructionAccount>,
|
2021-12-27 09:49:32 -08:00
|
|
|
instruction_data: Vec<u8>,
|
|
|
|
}
|
|
|
|
|
|
|
|
impl InstructionContext {
|
2022-02-02 16:45:57 -08:00
|
|
|
/// New
|
2022-08-20 02:20:47 -07:00
|
|
|
fn new(
|
2022-02-09 11:04:49 -08:00
|
|
|
nesting_level: usize,
|
2022-07-15 00:31:34 -07:00
|
|
|
instruction_accounts_lamport_sum: u128,
|
2022-08-20 02:20:47 -07:00
|
|
|
program_accounts: Vec<usize>,
|
|
|
|
instruction_accounts: Vec<InstructionAccount>,
|
|
|
|
instruction_data: Vec<u8>,
|
2022-02-02 16:45:57 -08:00
|
|
|
) -> Self {
|
|
|
|
InstructionContext {
|
2022-02-09 11:04:49 -08:00
|
|
|
nesting_level,
|
2022-07-15 00:31:34 -07:00
|
|
|
instruction_accounts_lamport_sum,
|
2022-08-20 02:20:47 -07:00
|
|
|
program_accounts,
|
|
|
|
instruction_accounts,
|
|
|
|
instruction_data,
|
2022-02-02 16:45:57 -08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2022-02-09 11:04:49 -08:00
|
|
|
/// How many Instructions were on the stack after this one was pushed
|
|
|
|
///
|
|
|
|
/// That is the number of nested parent Instructions plus one (itself).
|
|
|
|
pub fn get_stack_height(&self) -> usize {
|
|
|
|
self.nesting_level.saturating_add(1)
|
|
|
|
}
|
|
|
|
|
2021-12-27 09:49:32 -08:00
|
|
|
/// Number of program accounts
|
|
|
|
pub fn get_number_of_program_accounts(&self) -> usize {
|
2021-12-30 06:46:36 -08:00
|
|
|
self.program_accounts.len()
|
2021-12-27 09:49:32 -08:00
|
|
|
}
|
|
|
|
|
|
|
|
/// Number of accounts in this Instruction (without program accounts)
|
|
|
|
pub fn get_number_of_instruction_accounts(&self) -> usize {
|
2021-12-30 06:46:36 -08:00
|
|
|
self.instruction_accounts.len()
|
2021-12-27 09:49:32 -08:00
|
|
|
}
|
|
|
|
|
2022-02-18 17:06:33 -08:00
|
|
|
/// Assert that enough account were supplied to this Instruction
|
|
|
|
pub fn check_number_of_instruction_accounts(
|
|
|
|
&self,
|
|
|
|
expected_at_least: usize,
|
|
|
|
) -> Result<(), InstructionError> {
|
|
|
|
if self.get_number_of_instruction_accounts() < expected_at_least {
|
|
|
|
Err(InstructionError::NotEnoughAccountKeys)
|
|
|
|
} else {
|
|
|
|
Ok(())
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2021-12-27 09:49:32 -08:00
|
|
|
/// Data parameter for the programs `process_instruction` handler
|
|
|
|
pub fn get_instruction_data(&self) -> &[u8] {
|
|
|
|
&self.instruction_data
|
|
|
|
}
|
|
|
|
|
2021-12-30 06:46:36 -08:00
|
|
|
/// Searches for a program account by its key
|
|
|
|
pub fn find_index_of_program_account(
|
|
|
|
&self,
|
|
|
|
transaction_context: &TransactionContext,
|
|
|
|
pubkey: &Pubkey,
|
|
|
|
) -> Option<usize> {
|
|
|
|
self.program_accounts
|
|
|
|
.iter()
|
|
|
|
.position(|index_in_transaction| {
|
|
|
|
&transaction_context.account_keys[*index_in_transaction] == pubkey
|
|
|
|
})
|
|
|
|
}
|
|
|
|
|
2022-06-16 09:46:17 -07:00
|
|
|
/// Searches for an instruction account by its key
|
|
|
|
pub fn find_index_of_instruction_account(
|
2021-12-30 06:46:36 -08:00
|
|
|
&self,
|
|
|
|
transaction_context: &TransactionContext,
|
|
|
|
pubkey: &Pubkey,
|
|
|
|
) -> Option<usize> {
|
|
|
|
self.instruction_accounts
|
|
|
|
.iter()
|
|
|
|
.position(|instruction_account| {
|
|
|
|
&transaction_context.account_keys[instruction_account.index_in_transaction]
|
|
|
|
== pubkey
|
|
|
|
})
|
|
|
|
}
|
|
|
|
|
2022-06-16 09:46:17 -07:00
|
|
|
/// Translates the given instruction wide program_account_index into a transaction wide index
|
|
|
|
pub fn get_index_of_program_account_in_transaction(
|
2022-01-03 14:30:56 -08:00
|
|
|
&self,
|
2022-06-16 09:46:17 -07:00
|
|
|
program_account_index: usize,
|
|
|
|
) -> Result<usize, InstructionError> {
|
|
|
|
Ok(*self
|
|
|
|
.program_accounts
|
|
|
|
.get(program_account_index)
|
|
|
|
.ok_or(InstructionError::NotEnoughAccountKeys)?)
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Translates the given instruction wide instruction_account_index into a transaction wide index
|
|
|
|
pub fn get_index_of_instruction_account_in_transaction(
|
|
|
|
&self,
|
|
|
|
instruction_account_index: usize,
|
2022-01-03 14:30:56 -08:00
|
|
|
) -> Result<usize, InstructionError> {
|
2022-06-16 09:46:17 -07:00
|
|
|
Ok(self
|
|
|
|
.instruction_accounts
|
|
|
|
.get(instruction_account_index)
|
|
|
|
.ok_or(InstructionError::NotEnoughAccountKeys)?
|
2022-01-03 14:30:56 -08:00
|
|
|
.index_in_transaction)
|
|
|
|
}
|
|
|
|
|
2022-06-16 09:46:17 -07:00
|
|
|
/// Returns `Some(instruction_account_index)` if this is a duplicate
|
2022-05-24 15:04:46 -07:00
|
|
|
/// and `None` if it is the first account with this key
|
2022-06-16 09:46:17 -07:00
|
|
|
pub fn is_instruction_account_duplicate(
|
2022-05-24 15:04:46 -07:00
|
|
|
&self,
|
2022-06-16 09:46:17 -07:00
|
|
|
instruction_account_index: usize,
|
2022-05-24 15:04:46 -07:00
|
|
|
) -> Result<Option<usize>, InstructionError> {
|
2022-06-16 09:46:17 -07:00
|
|
|
let index_in_callee = self
|
|
|
|
.instruction_accounts
|
|
|
|
.get(instruction_account_index)
|
|
|
|
.ok_or(InstructionError::NotEnoughAccountKeys)?
|
|
|
|
.index_in_callee;
|
|
|
|
Ok(if index_in_callee == instruction_account_index {
|
|
|
|
None
|
2022-05-24 15:04:46 -07:00
|
|
|
} else {
|
2022-06-16 09:46:17 -07:00
|
|
|
Some(index_in_callee)
|
|
|
|
})
|
2022-05-24 15:04:46 -07:00
|
|
|
}
|
|
|
|
|
2022-02-18 17:06:33 -08:00
|
|
|
/// Gets the key of the last program account of this Instruction
|
2022-06-16 09:46:17 -07:00
|
|
|
pub fn get_last_program_key<'a, 'b: 'a>(
|
2022-02-18 17:06:33 -08:00
|
|
|
&'a self,
|
|
|
|
transaction_context: &'b TransactionContext,
|
|
|
|
) -> Result<&'b Pubkey, InstructionError> {
|
2022-06-16 09:46:17 -07:00
|
|
|
let result = self
|
|
|
|
.get_index_of_program_account_in_transaction(
|
|
|
|
self.program_accounts.len().saturating_sub(1),
|
|
|
|
)
|
|
|
|
.and_then(|index_in_transaction| {
|
|
|
|
transaction_context.get_key_of_account_at_index(index_in_transaction)
|
|
|
|
});
|
|
|
|
debug_assert!(result.is_ok());
|
|
|
|
result
|
2022-02-18 17:06:33 -08:00
|
|
|
}
|
|
|
|
|
2022-06-16 09:46:17 -07:00
|
|
|
fn try_borrow_account<'a, 'b: 'a>(
|
2021-12-27 09:49:32 -08:00
|
|
|
&'a self,
|
|
|
|
transaction_context: &'b TransactionContext,
|
2022-06-16 09:46:17 -07:00
|
|
|
index_in_transaction: usize,
|
2021-12-27 09:49:32 -08:00
|
|
|
index_in_instruction: usize,
|
|
|
|
) -> Result<BorrowedAccount<'a>, InstructionError> {
|
2022-06-16 09:46:17 -07:00
|
|
|
let account = transaction_context
|
|
|
|
.accounts
|
|
|
|
.get(index_in_transaction)
|
|
|
|
.ok_or(InstructionError::MissingAccount)?
|
2021-12-27 09:49:32 -08:00
|
|
|
.try_borrow_mut()
|
|
|
|
.map_err(|_| InstructionError::AccountBorrowFailed)?;
|
|
|
|
Ok(BorrowedAccount {
|
|
|
|
transaction_context,
|
|
|
|
instruction_context: self,
|
|
|
|
index_in_transaction,
|
|
|
|
index_in_instruction,
|
|
|
|
account,
|
|
|
|
})
|
|
|
|
}
|
2021-12-30 06:46:36 -08:00
|
|
|
|
2022-01-05 00:39:37 -08:00
|
|
|
/// Gets the last program account of this Instruction
|
2022-06-16 09:46:17 -07:00
|
|
|
pub fn try_borrow_last_program_account<'a, 'b: 'a>(
|
|
|
|
&'a self,
|
|
|
|
transaction_context: &'b TransactionContext,
|
|
|
|
) -> Result<BorrowedAccount<'a>, InstructionError> {
|
|
|
|
let result = self.try_borrow_program_account(
|
|
|
|
transaction_context,
|
|
|
|
self.program_accounts.len().saturating_sub(1),
|
|
|
|
);
|
|
|
|
debug_assert!(result.is_ok());
|
|
|
|
result
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Tries to borrow a program account from this Instruction
|
2021-12-30 06:46:36 -08:00
|
|
|
pub fn try_borrow_program_account<'a, 'b: 'a>(
|
|
|
|
&'a self,
|
|
|
|
transaction_context: &'b TransactionContext,
|
2022-06-16 09:46:17 -07:00
|
|
|
program_account_index: usize,
|
2021-12-30 06:46:36 -08:00
|
|
|
) -> Result<BorrowedAccount<'a>, InstructionError> {
|
2022-06-16 09:46:17 -07:00
|
|
|
let index_in_transaction =
|
|
|
|
self.get_index_of_program_account_in_transaction(program_account_index)?;
|
2021-12-30 06:46:36 -08:00
|
|
|
self.try_borrow_account(
|
|
|
|
transaction_context,
|
2022-06-16 09:46:17 -07:00
|
|
|
index_in_transaction,
|
|
|
|
program_account_index,
|
2021-12-30 06:46:36 -08:00
|
|
|
)
|
|
|
|
}
|
|
|
|
|
2022-01-05 00:39:37 -08:00
|
|
|
/// Gets an instruction account of this Instruction
|
2021-12-30 06:46:36 -08:00
|
|
|
pub fn try_borrow_instruction_account<'a, 'b: 'a>(
|
|
|
|
&'a self,
|
|
|
|
transaction_context: &'b TransactionContext,
|
2022-02-18 17:06:33 -08:00
|
|
|
instruction_account_index: usize,
|
2021-12-30 06:46:36 -08:00
|
|
|
) -> Result<BorrowedAccount<'a>, InstructionError> {
|
2022-06-16 09:46:17 -07:00
|
|
|
let index_in_transaction =
|
|
|
|
self.get_index_of_instruction_account_in_transaction(instruction_account_index)?;
|
2021-12-30 06:46:36 -08:00
|
|
|
self.try_borrow_account(
|
|
|
|
transaction_context,
|
2022-06-16 09:46:17 -07:00
|
|
|
index_in_transaction,
|
2021-12-30 06:46:36 -08:00
|
|
|
self.program_accounts
|
|
|
|
.len()
|
2022-02-18 17:06:33 -08:00
|
|
|
.saturating_add(instruction_account_index),
|
2021-12-30 06:46:36 -08:00
|
|
|
)
|
|
|
|
}
|
2022-01-05 00:39:37 -08:00
|
|
|
|
2022-06-16 09:46:17 -07:00
|
|
|
/// Returns whether an instruction account is a signer
|
|
|
|
pub fn is_instruction_account_signer(
|
|
|
|
&self,
|
|
|
|
instruction_account_index: usize,
|
|
|
|
) -> Result<bool, InstructionError> {
|
|
|
|
Ok(self
|
|
|
|
.instruction_accounts
|
|
|
|
.get(instruction_account_index)
|
|
|
|
.ok_or(InstructionError::MissingAccount)?
|
|
|
|
.is_signer)
|
2022-02-02 16:45:57 -08:00
|
|
|
}
|
|
|
|
|
2022-06-16 09:46:17 -07:00
|
|
|
/// Returns whether an instruction account is writable
|
|
|
|
pub fn is_instruction_account_writable(
|
|
|
|
&self,
|
|
|
|
instruction_account_index: usize,
|
|
|
|
) -> Result<bool, InstructionError> {
|
|
|
|
Ok(self
|
|
|
|
.instruction_accounts
|
|
|
|
.get(instruction_account_index)
|
|
|
|
.ok_or(InstructionError::MissingAccount)?
|
|
|
|
.is_writable)
|
2022-02-03 08:19:42 -08:00
|
|
|
}
|
|
|
|
|
2022-06-16 09:46:17 -07:00
|
|
|
/// Calculates the set of all keys of signer instruction accounts in this Instruction
|
2022-02-03 08:19:42 -08:00
|
|
|
pub fn get_signers(&self, transaction_context: &TransactionContext) -> HashSet<Pubkey> {
|
|
|
|
let mut result = HashSet::new();
|
|
|
|
for instruction_account in self.instruction_accounts.iter() {
|
|
|
|
if instruction_account.is_signer {
|
|
|
|
result.insert(
|
|
|
|
transaction_context.account_keys[instruction_account.index_in_transaction],
|
|
|
|
);
|
|
|
|
}
|
2022-02-02 16:45:57 -08:00
|
|
|
}
|
2022-02-03 08:19:42 -08:00
|
|
|
result
|
2022-02-02 16:45:57 -08:00
|
|
|
}
|
2021-12-27 09:49:32 -08:00
|
|
|
}
|
|
|
|
|
|
|
|
/// Shared account borrowed from the TransactionContext and an InstructionContext.
|
2021-12-30 06:46:36 -08:00
|
|
|
#[derive(Debug)]
|
2021-12-27 09:49:32 -08:00
|
|
|
pub struct BorrowedAccount<'a> {
|
|
|
|
transaction_context: &'a TransactionContext,
|
|
|
|
instruction_context: &'a InstructionContext,
|
|
|
|
index_in_transaction: usize,
|
|
|
|
index_in_instruction: usize,
|
|
|
|
account: RefMut<'a, AccountSharedData>,
|
|
|
|
}
|
|
|
|
|
|
|
|
impl<'a> BorrowedAccount<'a> {
|
2021-12-30 06:46:36 -08:00
|
|
|
/// Returns the index of this account (transaction wide)
|
|
|
|
pub fn get_index_in_transaction(&self) -> usize {
|
|
|
|
self.index_in_transaction
|
|
|
|
}
|
|
|
|
|
2021-12-27 09:49:32 -08:00
|
|
|
/// Returns the public key of this account (transaction wide)
|
|
|
|
pub fn get_key(&self) -> &Pubkey {
|
|
|
|
&self.transaction_context.account_keys[self.index_in_transaction]
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Returns the owner of this account (transaction wide)
|
|
|
|
pub fn get_owner(&self) -> &Pubkey {
|
|
|
|
self.account.owner()
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Assignes the owner of this account (transaction wide)
|
2022-05-21 08:47:09 -07:00
|
|
|
pub fn set_owner(&mut self, pubkey: &[u8]) -> Result<(), InstructionError> {
|
2022-07-15 00:31:34 -07:00
|
|
|
if self
|
|
|
|
.transaction_context
|
|
|
|
.is_early_verification_of_account_modifications_enabled()
|
|
|
|
{
|
|
|
|
// Only the owner can assign a new owner
|
|
|
|
if !self.is_owned_by_current_program() {
|
|
|
|
return Err(InstructionError::ModifiedProgramId);
|
|
|
|
}
|
|
|
|
// and only if the account is writable
|
|
|
|
if !self.is_writable() {
|
|
|
|
return Err(InstructionError::ModifiedProgramId);
|
|
|
|
}
|
|
|
|
// and only if the account is not executable
|
|
|
|
if self.is_executable() {
|
|
|
|
return Err(InstructionError::ModifiedProgramId);
|
|
|
|
}
|
|
|
|
// and only if the data is zero-initialized or empty
|
|
|
|
if !is_zeroed(self.get_data()) {
|
|
|
|
return Err(InstructionError::ModifiedProgramId);
|
|
|
|
}
|
|
|
|
// don't touch the account if the owner does not change
|
|
|
|
if self.get_owner().to_bytes() == pubkey {
|
|
|
|
return Ok(());
|
|
|
|
}
|
|
|
|
self.touch()?;
|
|
|
|
}
|
2022-01-03 14:30:56 -08:00
|
|
|
self.account.copy_into_owner_from_slice(pubkey);
|
2022-05-21 08:47:09 -07:00
|
|
|
Ok(())
|
2021-12-27 09:49:32 -08:00
|
|
|
}
|
|
|
|
|
|
|
|
/// Returns the number of lamports of this account (transaction wide)
|
|
|
|
pub fn get_lamports(&self) -> u64 {
|
|
|
|
self.account.lamports()
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Overwrites the number of lamports of this account (transaction wide)
|
2022-05-21 08:47:09 -07:00
|
|
|
pub fn set_lamports(&mut self, lamports: u64) -> Result<(), InstructionError> {
|
2022-07-15 00:31:34 -07:00
|
|
|
if self
|
|
|
|
.transaction_context
|
|
|
|
.is_early_verification_of_account_modifications_enabled()
|
|
|
|
{
|
|
|
|
// An account not owned by the program cannot have its balance decrease
|
|
|
|
if !self.is_owned_by_current_program() && lamports < self.get_lamports() {
|
|
|
|
return Err(InstructionError::ExternalAccountLamportSpend);
|
|
|
|
}
|
|
|
|
// The balance of read-only may not change
|
|
|
|
if !self.is_writable() {
|
|
|
|
return Err(InstructionError::ReadonlyLamportChange);
|
|
|
|
}
|
|
|
|
// The balance of executable accounts may not change
|
|
|
|
if self.is_executable() {
|
|
|
|
return Err(InstructionError::ExecutableLamportChange);
|
|
|
|
}
|
|
|
|
// don't touch the account if the lamports do not change
|
|
|
|
if self.get_lamports() == lamports {
|
|
|
|
return Ok(());
|
|
|
|
}
|
|
|
|
self.touch()?;
|
|
|
|
}
|
2021-12-27 09:49:32 -08:00
|
|
|
self.account.set_lamports(lamports);
|
2022-05-21 08:47:09 -07:00
|
|
|
Ok(())
|
2021-12-27 09:49:32 -08:00
|
|
|
}
|
|
|
|
|
2021-12-30 06:46:36 -08:00
|
|
|
/// Adds lamports to this account (transaction wide)
|
|
|
|
pub fn checked_add_lamports(&mut self, lamports: u64) -> Result<(), InstructionError> {
|
|
|
|
self.set_lamports(
|
|
|
|
self.get_lamports()
|
|
|
|
.checked_add(lamports)
|
2022-06-28 01:04:54 -07:00
|
|
|
.ok_or(InstructionError::ArithmeticOverflow)?,
|
2022-05-21 08:47:09 -07:00
|
|
|
)
|
2021-12-30 06:46:36 -08:00
|
|
|
}
|
|
|
|
|
|
|
|
/// Subtracts lamports from this account (transaction wide)
|
|
|
|
pub fn checked_sub_lamports(&mut self, lamports: u64) -> Result<(), InstructionError> {
|
|
|
|
self.set_lamports(
|
|
|
|
self.get_lamports()
|
|
|
|
.checked_sub(lamports)
|
2022-06-28 01:04:54 -07:00
|
|
|
.ok_or(InstructionError::ArithmeticOverflow)?,
|
2022-05-21 08:47:09 -07:00
|
|
|
)
|
2022-01-05 00:39:37 -08:00
|
|
|
}
|
|
|
|
|
2021-12-27 09:49:32 -08:00
|
|
|
/// Returns a read-only slice of the account data (transaction wide)
|
|
|
|
pub fn get_data(&self) -> &[u8] {
|
|
|
|
self.account.data()
|
|
|
|
}
|
|
|
|
|
2022-02-03 08:19:42 -08:00
|
|
|
/// Returns a writable slice of the account data (transaction wide)
|
2022-05-21 08:47:09 -07:00
|
|
|
pub fn get_data_mut(&mut self) -> Result<&mut [u8], InstructionError> {
|
2022-07-15 00:31:34 -07:00
|
|
|
self.can_data_be_changed()?;
|
|
|
|
self.touch()?;
|
2022-05-21 08:47:09 -07:00
|
|
|
Ok(self.account.data_as_mut_slice())
|
2022-02-03 08:19:42 -08:00
|
|
|
}
|
|
|
|
|
2022-01-03 14:30:56 -08:00
|
|
|
/// Overwrites the account data and size (transaction wide)
|
2022-05-21 08:47:09 -07:00
|
|
|
pub fn set_data(&mut self, data: &[u8]) -> Result<(), InstructionError> {
|
2022-07-15 00:31:34 -07:00
|
|
|
self.can_data_be_resized(data.len())?;
|
|
|
|
self.can_data_be_changed()?;
|
|
|
|
self.touch()?;
|
2022-01-03 14:30:56 -08:00
|
|
|
if data.len() == self.account.data().len() {
|
|
|
|
self.account.data_as_mut_slice().copy_from_slice(data);
|
|
|
|
} else {
|
2022-07-15 00:31:34 -07:00
|
|
|
let mut accounts_resize_delta = self
|
|
|
|
.transaction_context
|
|
|
|
.accounts_resize_delta
|
|
|
|
.try_borrow_mut()
|
|
|
|
.map_err(|_| InstructionError::GenericError)?;
|
|
|
|
*accounts_resize_delta = accounts_resize_delta
|
2022-07-06 10:27:42 -07:00
|
|
|
.saturating_add((data.len() as i64).saturating_sub(self.get_data().len() as i64));
|
2022-01-03 14:30:56 -08:00
|
|
|
self.account.set_data_from_slice(data);
|
2021-12-30 06:46:36 -08:00
|
|
|
}
|
2022-05-21 08:47:09 -07:00
|
|
|
Ok(())
|
2021-12-30 06:46:36 -08:00
|
|
|
}
|
|
|
|
|
2022-02-03 08:19:42 -08:00
|
|
|
/// Resizes the account data (transaction wide)
|
|
|
|
///
|
|
|
|
/// Fills it with zeros at the end if is extended or truncates at the end otherwise.
|
2022-07-06 10:27:42 -07:00
|
|
|
pub fn set_data_length(&mut self, new_length: usize) -> Result<(), InstructionError> {
|
2022-07-15 00:31:34 -07:00
|
|
|
self.can_data_be_resized(new_length)?;
|
|
|
|
self.can_data_be_changed()?;
|
|
|
|
// don't touch the account if the length does not change
|
|
|
|
if self.get_data().len() == new_length {
|
|
|
|
return Ok(());
|
|
|
|
}
|
|
|
|
self.touch()?;
|
|
|
|
let mut accounts_resize_delta = self
|
|
|
|
.transaction_context
|
|
|
|
.accounts_resize_delta
|
|
|
|
.try_borrow_mut()
|
|
|
|
.map_err(|_| InstructionError::GenericError)?;
|
|
|
|
*accounts_resize_delta = accounts_resize_delta
|
2022-07-06 10:27:42 -07:00
|
|
|
.saturating_add((new_length as i64).saturating_sub(self.get_data().len() as i64));
|
|
|
|
self.account.data_mut().resize(new_length, 0);
|
2022-05-21 08:47:09 -07:00
|
|
|
Ok(())
|
2022-02-03 08:19:42 -08:00
|
|
|
}
|
2022-01-03 14:30:56 -08:00
|
|
|
|
2021-12-30 06:46:36 -08:00
|
|
|
/// Deserializes the account data into a state
|
|
|
|
pub fn get_state<T: serde::de::DeserializeOwned>(&self) -> Result<T, InstructionError> {
|
|
|
|
self.account
|
|
|
|
.deserialize_data()
|
|
|
|
.map_err(|_| InstructionError::InvalidAccountData)
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Serializes a state into the account data
|
|
|
|
pub fn set_state<T: serde::Serialize>(&mut self, state: &T) -> Result<(), InstructionError> {
|
2022-07-15 00:31:34 -07:00
|
|
|
let data = self.get_data_mut()?;
|
2021-12-30 06:46:36 -08:00
|
|
|
let serialized_size =
|
|
|
|
bincode::serialized_size(state).map_err(|_| InstructionError::GenericError)?;
|
|
|
|
if serialized_size > data.len() as u64 {
|
|
|
|
return Err(InstructionError::AccountDataTooSmall);
|
|
|
|
}
|
2022-01-03 14:30:56 -08:00
|
|
|
bincode::serialize_into(&mut *data, state).map_err(|_| InstructionError::GenericError)?;
|
2022-02-03 08:19:42 -08:00
|
|
|
Ok(())
|
2021-12-30 06:46:36 -08:00
|
|
|
}
|
|
|
|
|
2021-12-27 09:49:32 -08:00
|
|
|
/// Returns whether this account is executable (transaction wide)
|
|
|
|
pub fn is_executable(&self) -> bool {
|
|
|
|
self.account.executable()
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Configures whether this account is executable (transaction wide)
|
2022-05-21 08:47:09 -07:00
|
|
|
pub fn set_executable(&mut self, is_executable: bool) -> Result<(), InstructionError> {
|
2022-07-15 00:31:34 -07:00
|
|
|
if let Some(rent) = self.transaction_context.rent {
|
|
|
|
// To become executable an account must be rent exempt
|
|
|
|
if !rent.is_exempt(self.get_lamports(), self.get_data().len()) {
|
|
|
|
return Err(InstructionError::ExecutableAccountNotRentExempt);
|
|
|
|
}
|
|
|
|
// Only the owner can set the executable flag
|
|
|
|
if !self.is_owned_by_current_program() {
|
|
|
|
return Err(InstructionError::ExecutableModified);
|
|
|
|
}
|
|
|
|
// and only if the account is writable
|
|
|
|
if !self.is_writable() {
|
|
|
|
return Err(InstructionError::ExecutableModified);
|
|
|
|
}
|
|
|
|
// one can not clear the executable flag
|
|
|
|
if self.is_executable() && !is_executable {
|
|
|
|
return Err(InstructionError::ExecutableModified);
|
|
|
|
}
|
|
|
|
// don't touch the account if the executable flag does not change
|
|
|
|
if self.is_executable() == is_executable {
|
|
|
|
return Ok(());
|
|
|
|
}
|
|
|
|
self.touch()?;
|
|
|
|
}
|
2021-12-27 09:49:32 -08:00
|
|
|
self.account.set_executable(is_executable);
|
2022-05-21 08:47:09 -07:00
|
|
|
Ok(())
|
2022-01-03 14:30:56 -08:00
|
|
|
}
|
|
|
|
|
|
|
|
/// Returns the rent epoch of this account (transaction wide)
|
|
|
|
pub fn get_rent_epoch(&self) -> u64 {
|
|
|
|
self.account.rent_epoch()
|
2021-12-27 09:49:32 -08:00
|
|
|
}
|
|
|
|
|
|
|
|
/// Returns whether this account is a signer (instruction wide)
|
|
|
|
pub fn is_signer(&self) -> bool {
|
2022-06-16 09:46:17 -07:00
|
|
|
if self.index_in_instruction < self.instruction_context.program_accounts.len() {
|
|
|
|
return false;
|
|
|
|
}
|
2022-02-03 08:19:42 -08:00
|
|
|
self.instruction_context
|
2022-06-16 09:46:17 -07:00
|
|
|
.is_instruction_account_signer(
|
|
|
|
self.index_in_instruction
|
|
|
|
.saturating_sub(self.instruction_context.program_accounts.len()),
|
|
|
|
)
|
2022-02-03 08:19:42 -08:00
|
|
|
.unwrap_or_default()
|
2021-12-27 09:49:32 -08:00
|
|
|
}
|
|
|
|
|
|
|
|
/// Returns whether this account is writable (instruction wide)
|
|
|
|
pub fn is_writable(&self) -> bool {
|
2022-06-16 09:46:17 -07:00
|
|
|
if self.index_in_instruction < self.instruction_context.program_accounts.len() {
|
|
|
|
return false;
|
|
|
|
}
|
2022-02-03 08:19:42 -08:00
|
|
|
self.instruction_context
|
2022-06-16 09:46:17 -07:00
|
|
|
.is_instruction_account_writable(
|
|
|
|
self.index_in_instruction
|
|
|
|
.saturating_sub(self.instruction_context.program_accounts.len()),
|
|
|
|
)
|
2022-02-03 08:19:42 -08:00
|
|
|
.unwrap_or_default()
|
2021-12-27 09:49:32 -08:00
|
|
|
}
|
2022-07-15 00:31:34 -07:00
|
|
|
|
|
|
|
/// Returns true if the owner of this account is the current `InstructionContext`s last program (instruction wide)
|
|
|
|
pub fn is_owned_by_current_program(&self) -> bool {
|
|
|
|
self.instruction_context
|
|
|
|
.get_last_program_key(self.transaction_context)
|
|
|
|
.map(|key| key == self.get_owner())
|
|
|
|
.unwrap_or_default()
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Returns an error if the account data can not be mutated by the current program
|
|
|
|
pub fn can_data_be_changed(&self) -> Result<(), InstructionError> {
|
|
|
|
if !self
|
|
|
|
.transaction_context
|
|
|
|
.is_early_verification_of_account_modifications_enabled()
|
|
|
|
{
|
|
|
|
return Ok(());
|
|
|
|
}
|
|
|
|
// Only non-executable accounts data can be changed
|
|
|
|
if self.is_executable() {
|
|
|
|
return Err(InstructionError::ExecutableDataModified);
|
|
|
|
}
|
|
|
|
// and only if the account is writable
|
|
|
|
if !self.is_writable() {
|
|
|
|
return Err(InstructionError::ReadonlyDataModified);
|
|
|
|
}
|
|
|
|
// and only if we are the owner
|
|
|
|
if !self.is_owned_by_current_program() {
|
|
|
|
return Err(InstructionError::ExternalAccountDataModified);
|
|
|
|
}
|
|
|
|
Ok(())
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Returns an error if the account data can not be resized to the given length
|
|
|
|
pub fn can_data_be_resized(&self, new_length: usize) -> Result<(), InstructionError> {
|
|
|
|
if !self
|
|
|
|
.transaction_context
|
|
|
|
.is_early_verification_of_account_modifications_enabled()
|
|
|
|
{
|
|
|
|
return Ok(());
|
|
|
|
}
|
|
|
|
// Only the owner can change the length of the data
|
|
|
|
if new_length != self.get_data().len() && !self.is_owned_by_current_program() {
|
|
|
|
return Err(InstructionError::AccountDataSizeChanged);
|
|
|
|
}
|
|
|
|
// The new length can not exceed the maximum permitted length
|
|
|
|
if new_length > MAX_PERMITTED_DATA_LENGTH as usize {
|
|
|
|
return Err(InstructionError::InvalidRealloc);
|
|
|
|
}
|
|
|
|
Ok(())
|
|
|
|
}
|
|
|
|
|
|
|
|
fn touch(&self) -> Result<(), InstructionError> {
|
|
|
|
if self
|
|
|
|
.transaction_context
|
|
|
|
.is_early_verification_of_account_modifications_enabled()
|
|
|
|
{
|
|
|
|
*self
|
|
|
|
.transaction_context
|
|
|
|
.account_touched_flags
|
|
|
|
.try_borrow_mut()
|
|
|
|
.map_err(|_| InstructionError::GenericError)?
|
|
|
|
.get_mut(self.index_in_transaction)
|
|
|
|
.ok_or(InstructionError::NotEnoughAccountKeys)? = true;
|
|
|
|
}
|
|
|
|
Ok(())
|
|
|
|
}
|
2021-12-27 09:49:32 -08:00
|
|
|
}
|
2022-03-22 15:17:05 -07:00
|
|
|
|
|
|
|
/// Everything that needs to be recorded from a TransactionContext after execution
|
|
|
|
pub struct ExecutionRecord {
|
|
|
|
pub accounts: Vec<TransactionAccount>,
|
|
|
|
pub return_data: TransactionReturnData,
|
2022-08-23 05:58:32 -07:00
|
|
|
pub touched_account_count: u64,
|
2022-07-15 00:31:34 -07:00
|
|
|
pub accounts_resize_delta: i64,
|
2022-03-22 15:17:05 -07:00
|
|
|
}
|
2022-07-06 10:27:42 -07:00
|
|
|
|
2022-03-22 15:17:05 -07:00
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/// Used by the bank in the runtime to write back the processed accounts and recorded instructions
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impl From<TransactionContext> for ExecutionRecord {
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fn from(context: TransactionContext) -> Self {
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2022-07-15 00:31:34 -07:00
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let account_touched_flags = context
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.account_touched_flags
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.try_borrow()
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.expect("borrowing transaction_context.account_touched_flags failed");
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2022-08-23 05:58:32 -07:00
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let touched_account_count = account_touched_flags
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.iter()
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.fold(0u64, |accumulator, was_touched| {
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accumulator.saturating_add(*was_touched as u64)
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});
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2022-03-22 15:17:05 -07:00
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Self {
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accounts: Vec::from(Pin::into_inner(context.account_keys))
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.into_iter()
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.zip(
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Vec::from(Pin::into_inner(context.accounts))
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.into_iter()
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.map(|account| account.into_inner()),
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)
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.collect(),
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return_data: context.return_data,
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2022-08-23 05:58:32 -07:00
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touched_account_count,
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2022-07-15 00:31:34 -07:00
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accounts_resize_delta: RefCell::into_inner(context.accounts_resize_delta),
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2022-03-22 15:17:05 -07:00
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}
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}
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}
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2022-07-15 00:31:34 -07:00
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fn is_zeroed(buf: &[u8]) -> bool {
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const ZEROS_LEN: usize = 1024;
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const ZEROS: [u8; ZEROS_LEN] = [0; ZEROS_LEN];
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let mut chunks = buf.chunks_exact(ZEROS_LEN);
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#[allow(clippy::indexing_slicing)]
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{
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chunks.all(|chunk| chunk == &ZEROS[..])
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&& chunks.remainder() == &ZEROS[..chunks.remainder().len()]
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}
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}
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