1239 lines
46 KiB
Rust
1239 lines
46 KiB
Rust
//! Data shared between program runtime and built-in programs as well as SBF programs.
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#![deny(clippy::indexing_slicing)]
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#[cfg(all(not(target_os = "solana"), debug_assertions))]
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use crate::signature::Signature;
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#[cfg(not(target_os = "solana"))]
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use {
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crate::{
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account::WritableAccount,
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rent::Rent,
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system_instruction::{
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MAX_PERMITTED_ACCOUNTS_DATA_ALLOCATIONS_PER_TRANSACTION, MAX_PERMITTED_DATA_LENGTH,
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},
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},
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solana_program::entrypoint::MAX_PERMITTED_DATA_INCREASE,
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std::mem::MaybeUninit,
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};
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use {
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crate::{
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account::{AccountSharedData, ReadableAccount},
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instruction::InstructionError,
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pubkey::Pubkey,
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},
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std::{
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cell::{Ref, RefCell, RefMut},
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collections::HashSet,
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pin::Pin,
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rc::Rc,
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},
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};
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/// Index of an account inside of the TransactionContext or an InstructionContext.
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pub type IndexOfAccount = u16;
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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, Eq, PartialEq)]
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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: IndexOfAccount,
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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: IndexOfAccount,
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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: IndexOfAccount,
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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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/// An account key and the matching account
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pub type TransactionAccount = (Pubkey, AccountSharedData);
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#[derive(Clone, Debug, PartialEq)]
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pub struct TransactionAccounts {
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accounts: Vec<RefCell<AccountSharedData>>,
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touched_flags: RefCell<Box<[bool]>>,
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is_early_verification_of_account_modifications_enabled: bool,
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}
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impl TransactionAccounts {
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#[cfg(not(target_os = "solana"))]
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fn new(
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accounts: Vec<RefCell<AccountSharedData>>,
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is_early_verification_of_account_modifications_enabled: bool,
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) -> TransactionAccounts {
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TransactionAccounts {
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touched_flags: RefCell::new(vec![false; accounts.len()].into_boxed_slice()),
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accounts,
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is_early_verification_of_account_modifications_enabled,
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}
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}
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fn len(&self) -> usize {
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self.accounts.len()
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}
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pub fn get(&self, index: IndexOfAccount) -> Option<&RefCell<AccountSharedData>> {
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self.accounts.get(index as usize)
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}
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#[cfg(not(target_os = "solana"))]
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pub fn touch(&self, index: IndexOfAccount) -> Result<(), InstructionError> {
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if self.is_early_verification_of_account_modifications_enabled {
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*self
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.touched_flags
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.borrow_mut()
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.get_mut(index as usize)
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.ok_or(InstructionError::NotEnoughAccountKeys)? = true;
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}
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Ok(())
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}
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#[cfg(not(target_os = "solana"))]
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pub fn touched_count(&self) -> usize {
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self.touched_flags
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.borrow()
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.iter()
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.fold(0usize, |accumulator, was_touched| {
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accumulator.saturating_add(*was_touched as usize)
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})
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}
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pub fn try_borrow(
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&self,
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index: IndexOfAccount,
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) -> Result<Ref<'_, AccountSharedData>, InstructionError> {
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self.accounts
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.get(index as usize)
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.ok_or(InstructionError::MissingAccount)?
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.try_borrow()
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.map_err(|_| InstructionError::AccountBorrowFailed)
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}
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pub fn try_borrow_mut(
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&self,
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index: IndexOfAccount,
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) -> Result<RefMut<'_, AccountSharedData>, InstructionError> {
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self.accounts
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.get(index as usize)
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.ok_or(InstructionError::MissingAccount)?
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.try_borrow_mut()
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.map_err(|_| InstructionError::AccountBorrowFailed)
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}
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pub fn into_accounts(self) -> Vec<AccountSharedData> {
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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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}
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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, Clone, PartialEq)]
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pub struct TransactionContext {
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account_keys: Pin<Box<[Pubkey]>>,
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accounts: Rc<TransactionAccounts>,
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instruction_stack_capacity: usize,
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instruction_trace_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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#[cfg(not(target_os = "solana"))]
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rent: Option<Rent>,
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#[cfg(not(target_os = "solana"))]
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is_cap_accounts_data_allocations_per_transaction_enabled: bool,
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/// Useful for debugging to filter by or to look it up on the explorer
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#[cfg(all(not(target_os = "solana"), debug_assertions))]
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signature: Signature,
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}
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impl TransactionContext {
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/// Constructs a new TransactionContext
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#[cfg(not(target_os = "solana"))]
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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_stack_capacity: usize,
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instruction_trace_capacity: usize,
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) -> Self {
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let (account_keys, accounts): (Vec<_>, Vec<_>) = 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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Self {
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account_keys: Pin::new(account_keys.into_boxed_slice()),
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accounts: Rc::new(TransactionAccounts::new(accounts, rent.is_some())),
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instruction_stack_capacity,
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instruction_trace_capacity,
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instruction_stack: Vec::with_capacity(instruction_stack_capacity),
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instruction_trace: vec![InstructionContext::default()],
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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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is_cap_accounts_data_allocations_per_transaction_enabled: false,
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#[cfg(all(not(target_os = "solana"), debug_assertions))]
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signature: Signature::default(),
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}
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}
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/// Used in mock_process_instruction
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#[cfg(not(target_os = "solana"))]
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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(Rc::try_unwrap(self.accounts)
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.expect("transaction_context.accounts has unexpected outstanding refs")
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.into_accounts())
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}
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#[cfg(not(target_os = "solana"))]
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pub fn accounts(&self) -> &Rc<TransactionAccounts> {
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&self.accounts
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}
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/// Returns true if `enable_early_verification_of_account_modifications` is active
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#[cfg(not(target_os = "solana"))]
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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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/// Stores the signature of the current transaction
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#[cfg(all(not(target_os = "solana"), debug_assertions))]
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pub fn set_signature(&mut self, signature: &Signature) {
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self.signature = *signature;
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}
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/// Returns the signature of the current transaction
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#[cfg(all(not(target_os = "solana"), debug_assertions))]
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pub fn get_signature(&self) -> &Signature {
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&self.signature
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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) -> IndexOfAccount {
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self.accounts.len() as IndexOfAccount
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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: IndexOfAccount,
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) -> Result<&Pubkey, InstructionError> {
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self.account_keys
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.get(index_in_transaction as usize)
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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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#[cfg(not(target_os = "solana"))]
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pub fn get_account_at_index(
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&self,
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index_in_transaction: IndexOfAccount,
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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<IndexOfAccount> {
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self.account_keys
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.iter()
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.position(|key| key == pubkey)
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.map(|index| index as IndexOfAccount)
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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<IndexOfAccount> {
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self.account_keys
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.iter()
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.rposition(|key| key == pubkey)
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.map(|index| index as IndexOfAccount)
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}
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/// Gets the max length of the InstructionContext trace
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pub fn get_instruction_trace_capacity(&self) -> usize {
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self.instruction_trace_capacity
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}
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/// Returns the instruction trace length.
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///
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/// Not counting the last empty InstructionContext which is always pre-reserved for the next instruction.
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/// See also `get_next_instruction_context()`.
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pub fn get_instruction_trace_length(&self) -> usize {
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self.instruction_trace.len().saturating_sub(1)
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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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/// 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_stack_capacity(&self) -> usize {
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self.instruction_stack_capacity
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}
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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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/// Returns the InstructionContext to configure for the next invocation.
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///
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/// The last InstructionContext is always empty and pre-reserved for the next instruction.
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pub fn get_next_instruction_context(
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&mut self,
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) -> Result<&mut InstructionContext, InstructionError> {
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self.instruction_trace
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.last_mut()
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.ok_or(InstructionError::CallDepth)
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}
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/// Pushes the next InstructionContext
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#[cfg(not(target_os = "solana"))]
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pub fn push(&mut self) -> Result<(), InstructionError> {
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let nesting_level = self.get_instruction_context_stack_height();
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let caller_instruction_context = self
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.instruction_trace
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.last()
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.ok_or(InstructionError::CallDepth)?;
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let callee_instruction_accounts_lamport_sum =
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self.instruction_accounts_lamport_sum(caller_instruction_context)?;
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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 =
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self.instruction_accounts_lamport_sum(caller_instruction_context)?;
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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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{
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let instruction_context = self.get_next_instruction_context()?;
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instruction_context.nesting_level = nesting_level;
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instruction_context.instruction_accounts_lamport_sum =
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callee_instruction_accounts_lamport_sum;
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}
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let index_in_trace = self.get_instruction_trace_length();
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if index_in_trace >= self.instruction_trace_capacity {
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return Err(InstructionError::MaxInstructionTraceLengthExceeded);
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}
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self.instruction_trace.push(InstructionContext::default());
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if nesting_level >= self.instruction_stack_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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#[cfg(not(target_os = "solana"))]
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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(instruction_context)
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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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})
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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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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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}
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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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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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self.return_data = TransactionReturnData { program_id, data };
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Ok(())
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}
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|
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/// Calculates the sum of all lamports within an instruction
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#[cfg(not(target_os = "solana"))]
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fn instruction_accounts_lamport_sum(
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&self,
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instruction_context: &InstructionContext,
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) -> Result<u128, InstructionError> {
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if !self.is_early_verification_of_account_modifications_enabled() {
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return Ok(0);
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}
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let mut instruction_accounts_lamport_sum: u128 = 0;
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for instruction_account_index in 0..instruction_context.get_number_of_instruction_accounts()
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{
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if instruction_context
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.is_instruction_account_duplicate(instruction_account_index)?
|
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.is_some()
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{
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continue; // Skip duplicate account
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}
|
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let index_in_transaction = instruction_context
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.get_index_of_instruction_account_in_transaction(instruction_account_index)?;
|
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instruction_accounts_lamport_sum = (self
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.get_account_at_index(index_in_transaction)?
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.try_borrow()
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.map_err(|_| InstructionError::AccountBorrowOutstanding)?
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.lamports() as u128)
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.checked_add(instruction_accounts_lamport_sum)
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.ok_or(InstructionError::ArithmeticOverflow)?;
|
|
}
|
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Ok(instruction_accounts_lamport_sum)
|
|
}
|
|
|
|
/// Returns the accounts resize delta
|
|
pub fn accounts_resize_delta(&self) -> Result<i64, InstructionError> {
|
|
self.accounts_resize_delta
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.try_borrow()
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.map_err(|_| InstructionError::GenericError)
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.map(|value_ref| *value_ref)
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}
|
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|
|
/// Enables enforcing a maximum accounts data allocation size per transaction
|
|
#[cfg(not(target_os = "solana"))]
|
|
pub fn enable_cap_accounts_data_allocations_per_transaction(&mut self) {
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self.is_cap_accounts_data_allocations_per_transaction_enabled = true;
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}
|
|
}
|
|
|
|
/// Return data at the end of a transaction
|
|
#[derive(Clone, Debug, Default, Deserialize, PartialEq, Eq, Serialize)]
|
|
pub struct TransactionReturnData {
|
|
pub program_id: Pubkey,
|
|
pub data: Vec<u8>,
|
|
}
|
|
|
|
/// Loaded instruction shared between runtime and programs.
|
|
///
|
|
/// This context is valid for the entire duration of a (possibly cross program) instruction being processed.
|
|
#[derive(Debug, Clone, Default, Eq, PartialEq)]
|
|
pub struct InstructionContext {
|
|
nesting_level: usize,
|
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instruction_accounts_lamport_sum: u128,
|
|
program_accounts: Vec<IndexOfAccount>,
|
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instruction_accounts: Vec<InstructionAccount>,
|
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instruction_data: Vec<u8>,
|
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}
|
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|
|
impl InstructionContext {
|
|
/// Used together with TransactionContext::get_next_instruction_context()
|
|
#[cfg(not(target_os = "solana"))]
|
|
pub fn configure(
|
|
&mut self,
|
|
program_accounts: &[IndexOfAccount],
|
|
instruction_accounts: &[InstructionAccount],
|
|
instruction_data: &[u8],
|
|
) {
|
|
self.program_accounts = program_accounts.to_vec();
|
|
self.instruction_accounts = instruction_accounts.to_vec();
|
|
self.instruction_data = instruction_data.to_vec();
|
|
}
|
|
|
|
/// 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)
|
|
}
|
|
|
|
/// Number of program accounts
|
|
pub fn get_number_of_program_accounts(&self) -> IndexOfAccount {
|
|
self.program_accounts.len() as IndexOfAccount
|
|
}
|
|
|
|
/// Number of accounts in this Instruction (without program accounts)
|
|
pub fn get_number_of_instruction_accounts(&self) -> IndexOfAccount {
|
|
self.instruction_accounts.len() as IndexOfAccount
|
|
}
|
|
|
|
/// Assert that enough account were supplied to this Instruction
|
|
pub fn check_number_of_instruction_accounts(
|
|
&self,
|
|
expected_at_least: IndexOfAccount,
|
|
) -> Result<(), InstructionError> {
|
|
if self.get_number_of_instruction_accounts() < expected_at_least {
|
|
Err(InstructionError::NotEnoughAccountKeys)
|
|
} else {
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
/// Data parameter for the programs `process_instruction` handler
|
|
pub fn get_instruction_data(&self) -> &[u8] {
|
|
&self.instruction_data
|
|
}
|
|
|
|
/// Searches for a program account by its key
|
|
pub fn find_index_of_program_account(
|
|
&self,
|
|
transaction_context: &TransactionContext,
|
|
pubkey: &Pubkey,
|
|
) -> Option<IndexOfAccount> {
|
|
self.program_accounts
|
|
.iter()
|
|
.position(|index_in_transaction| {
|
|
transaction_context
|
|
.account_keys
|
|
.get(*index_in_transaction as usize)
|
|
== Some(pubkey)
|
|
})
|
|
.map(|index| index as IndexOfAccount)
|
|
}
|
|
|
|
/// Searches for an instruction account by its key
|
|
pub fn find_index_of_instruction_account(
|
|
&self,
|
|
transaction_context: &TransactionContext,
|
|
pubkey: &Pubkey,
|
|
) -> Option<IndexOfAccount> {
|
|
self.instruction_accounts
|
|
.iter()
|
|
.position(|instruction_account| {
|
|
transaction_context
|
|
.account_keys
|
|
.get(instruction_account.index_in_transaction as usize)
|
|
== Some(pubkey)
|
|
})
|
|
.map(|index| index as IndexOfAccount)
|
|
}
|
|
|
|
/// Translates the given instruction wide program_account_index into a transaction wide index
|
|
pub fn get_index_of_program_account_in_transaction(
|
|
&self,
|
|
program_account_index: IndexOfAccount,
|
|
) -> Result<IndexOfAccount, InstructionError> {
|
|
Ok(*self
|
|
.program_accounts
|
|
.get(program_account_index as usize)
|
|
.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: IndexOfAccount,
|
|
) -> Result<IndexOfAccount, InstructionError> {
|
|
Ok(self
|
|
.instruction_accounts
|
|
.get(instruction_account_index as usize)
|
|
.ok_or(InstructionError::NotEnoughAccountKeys)?
|
|
.index_in_transaction as IndexOfAccount)
|
|
}
|
|
|
|
/// Returns `Some(instruction_account_index)` if this is a duplicate
|
|
/// and `None` if it is the first account with this key
|
|
pub fn is_instruction_account_duplicate(
|
|
&self,
|
|
instruction_account_index: IndexOfAccount,
|
|
) -> Result<Option<IndexOfAccount>, InstructionError> {
|
|
let index_in_callee = self
|
|
.instruction_accounts
|
|
.get(instruction_account_index as usize)
|
|
.ok_or(InstructionError::NotEnoughAccountKeys)?
|
|
.index_in_callee;
|
|
Ok(if index_in_callee == instruction_account_index {
|
|
None
|
|
} else {
|
|
Some(index_in_callee)
|
|
})
|
|
}
|
|
|
|
/// Gets the key of the last program account of this Instruction
|
|
pub fn get_last_program_key<'a, 'b: 'a>(
|
|
&'a self,
|
|
transaction_context: &'b TransactionContext,
|
|
) -> Result<&'b Pubkey, InstructionError> {
|
|
self.get_index_of_program_account_in_transaction(
|
|
self.get_number_of_program_accounts().saturating_sub(1),
|
|
)
|
|
.and_then(|index_in_transaction| {
|
|
transaction_context.get_key_of_account_at_index(index_in_transaction)
|
|
})
|
|
}
|
|
|
|
fn try_borrow_account<'a, 'b: 'a>(
|
|
&'a self,
|
|
transaction_context: &'b TransactionContext,
|
|
index_in_transaction: IndexOfAccount,
|
|
index_in_instruction: IndexOfAccount,
|
|
) -> Result<BorrowedAccount<'a>, InstructionError> {
|
|
let account = transaction_context
|
|
.accounts
|
|
.get(index_in_transaction)
|
|
.ok_or(InstructionError::MissingAccount)?
|
|
.try_borrow_mut()
|
|
.map_err(|_| InstructionError::AccountBorrowFailed)?;
|
|
Ok(BorrowedAccount {
|
|
transaction_context,
|
|
instruction_context: self,
|
|
index_in_transaction,
|
|
index_in_instruction,
|
|
account,
|
|
})
|
|
}
|
|
|
|
/// Gets the last program account of this Instruction
|
|
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.get_number_of_program_accounts().saturating_sub(1),
|
|
);
|
|
debug_assert!(result.is_ok());
|
|
result
|
|
}
|
|
|
|
/// Tries to borrow a program account from this Instruction
|
|
pub fn try_borrow_program_account<'a, 'b: 'a>(
|
|
&'a self,
|
|
transaction_context: &'b TransactionContext,
|
|
program_account_index: IndexOfAccount,
|
|
) -> Result<BorrowedAccount<'a>, InstructionError> {
|
|
let index_in_transaction =
|
|
self.get_index_of_program_account_in_transaction(program_account_index)?;
|
|
self.try_borrow_account(
|
|
transaction_context,
|
|
index_in_transaction,
|
|
program_account_index,
|
|
)
|
|
}
|
|
|
|
/// Gets an instruction account of this Instruction
|
|
pub fn try_borrow_instruction_account<'a, 'b: 'a>(
|
|
&'a self,
|
|
transaction_context: &'b TransactionContext,
|
|
instruction_account_index: IndexOfAccount,
|
|
) -> Result<BorrowedAccount<'a>, InstructionError> {
|
|
let index_in_transaction =
|
|
self.get_index_of_instruction_account_in_transaction(instruction_account_index)?;
|
|
self.try_borrow_account(
|
|
transaction_context,
|
|
index_in_transaction,
|
|
self.get_number_of_program_accounts()
|
|
.saturating_add(instruction_account_index),
|
|
)
|
|
}
|
|
|
|
/// Returns whether an instruction account is a signer
|
|
pub fn is_instruction_account_signer(
|
|
&self,
|
|
instruction_account_index: IndexOfAccount,
|
|
) -> Result<bool, InstructionError> {
|
|
Ok(self
|
|
.instruction_accounts
|
|
.get(instruction_account_index as usize)
|
|
.ok_or(InstructionError::MissingAccount)?
|
|
.is_signer)
|
|
}
|
|
|
|
/// Returns whether an instruction account is writable
|
|
pub fn is_instruction_account_writable(
|
|
&self,
|
|
instruction_account_index: IndexOfAccount,
|
|
) -> Result<bool, InstructionError> {
|
|
Ok(self
|
|
.instruction_accounts
|
|
.get(instruction_account_index as usize)
|
|
.ok_or(InstructionError::MissingAccount)?
|
|
.is_writable)
|
|
}
|
|
|
|
/// Calculates the set of all keys of signer instruction accounts in this Instruction
|
|
pub fn get_signers(
|
|
&self,
|
|
transaction_context: &TransactionContext,
|
|
) -> Result<HashSet<Pubkey>, InstructionError> {
|
|
let mut result = HashSet::new();
|
|
for instruction_account in self.instruction_accounts.iter() {
|
|
if instruction_account.is_signer {
|
|
result.insert(
|
|
*transaction_context
|
|
.get_key_of_account_at_index(instruction_account.index_in_transaction)?,
|
|
);
|
|
}
|
|
}
|
|
Ok(result)
|
|
}
|
|
}
|
|
|
|
/// Shared account borrowed from the TransactionContext and an InstructionContext.
|
|
#[derive(Debug)]
|
|
pub struct BorrowedAccount<'a> {
|
|
transaction_context: &'a TransactionContext,
|
|
instruction_context: &'a InstructionContext,
|
|
index_in_transaction: IndexOfAccount,
|
|
index_in_instruction: IndexOfAccount,
|
|
account: RefMut<'a, AccountSharedData>,
|
|
}
|
|
|
|
impl<'a> BorrowedAccount<'a> {
|
|
/// Returns the transaction context
|
|
pub fn transaction_context(&self) -> &TransactionContext {
|
|
self.transaction_context
|
|
}
|
|
|
|
/// Returns the index of this account (transaction wide)
|
|
#[inline]
|
|
pub fn get_index_in_transaction(&self) -> IndexOfAccount {
|
|
self.index_in_transaction
|
|
}
|
|
|
|
/// Returns the public key of this account (transaction wide)
|
|
#[inline]
|
|
pub fn get_key(&self) -> &Pubkey {
|
|
self.transaction_context
|
|
.get_key_of_account_at_index(self.index_in_transaction)
|
|
.unwrap()
|
|
}
|
|
|
|
/// Returns the owner of this account (transaction wide)
|
|
#[inline]
|
|
pub fn get_owner(&self) -> &Pubkey {
|
|
self.account.owner()
|
|
}
|
|
|
|
/// Assignes the owner of this account (transaction wide)
|
|
#[cfg(not(target_os = "solana"))]
|
|
pub fn set_owner(&mut self, pubkey: &[u8]) -> Result<(), InstructionError> {
|
|
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()?;
|
|
}
|
|
self.account.copy_into_owner_from_slice(pubkey);
|
|
Ok(())
|
|
}
|
|
|
|
/// Returns the number of lamports of this account (transaction wide)
|
|
#[inline]
|
|
pub fn get_lamports(&self) -> u64 {
|
|
self.account.lamports()
|
|
}
|
|
|
|
/// Overwrites the number of lamports of this account (transaction wide)
|
|
#[cfg(not(target_os = "solana"))]
|
|
pub fn set_lamports(&mut self, lamports: u64) -> Result<(), InstructionError> {
|
|
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()?;
|
|
}
|
|
self.account.set_lamports(lamports);
|
|
Ok(())
|
|
}
|
|
|
|
/// Adds lamports to this account (transaction wide)
|
|
#[cfg(not(target_os = "solana"))]
|
|
pub fn checked_add_lamports(&mut self, lamports: u64) -> Result<(), InstructionError> {
|
|
self.set_lamports(
|
|
self.get_lamports()
|
|
.checked_add(lamports)
|
|
.ok_or(InstructionError::ArithmeticOverflow)?,
|
|
)
|
|
}
|
|
|
|
/// Subtracts lamports from this account (transaction wide)
|
|
#[cfg(not(target_os = "solana"))]
|
|
pub fn checked_sub_lamports(&mut self, lamports: u64) -> Result<(), InstructionError> {
|
|
self.set_lamports(
|
|
self.get_lamports()
|
|
.checked_sub(lamports)
|
|
.ok_or(InstructionError::ArithmeticOverflow)?,
|
|
)
|
|
}
|
|
|
|
/// Returns a read-only slice of the account data (transaction wide)
|
|
#[inline]
|
|
pub fn get_data(&self) -> &[u8] {
|
|
self.account.data()
|
|
}
|
|
|
|
/// Returns a writable slice of the account data (transaction wide)
|
|
#[cfg(not(target_os = "solana"))]
|
|
pub fn get_data_mut(&mut self) -> Result<&mut [u8], InstructionError> {
|
|
self.can_data_be_changed()?;
|
|
self.touch()?;
|
|
self.make_data_mut();
|
|
Ok(self.account.data_as_mut_slice())
|
|
}
|
|
|
|
/// Returns the spare capacity of the vector backing the account data.
|
|
///
|
|
/// This method should only ever be used during CPI, where after a shrinking
|
|
/// realloc we want to zero the spare capacity.
|
|
#[cfg(not(target_os = "solana"))]
|
|
pub fn spare_data_capacity_mut(&mut self) -> Result<&mut [MaybeUninit<u8>], InstructionError> {
|
|
debug_assert!(!self.account.is_shared());
|
|
Ok(self.account.spare_data_capacity_mut())
|
|
}
|
|
|
|
/// Overwrites the account data and size (transaction wide).
|
|
///
|
|
/// You should always prefer set_data_from_slice(). Calling this method is
|
|
/// currently safe but requires some special casing during CPI when direct
|
|
/// account mapping is enabled.
|
|
#[cfg(all(
|
|
not(target_os = "solana"),
|
|
any(test, feature = "dev-context-only-utils")
|
|
))]
|
|
pub fn set_data(&mut self, data: Vec<u8>) -> Result<(), InstructionError> {
|
|
self.can_data_be_resized(data.len())?;
|
|
self.can_data_be_changed()?;
|
|
self.touch()?;
|
|
|
|
self.update_accounts_resize_delta(data.len())?;
|
|
self.account.set_data(data);
|
|
Ok(())
|
|
}
|
|
|
|
/// Overwrites the account data and size (transaction wide).
|
|
///
|
|
/// Call this when you have a slice of data you do not own and want to
|
|
/// replace the account data with it.
|
|
#[cfg(not(target_os = "solana"))]
|
|
pub fn set_data_from_slice(&mut self, data: &[u8]) -> Result<(), InstructionError> {
|
|
self.can_data_be_resized(data.len())?;
|
|
self.can_data_be_changed()?;
|
|
self.touch()?;
|
|
self.update_accounts_resize_delta(data.len())?;
|
|
// Calling make_data_mut() here guarantees that set_data_from_slice()
|
|
// copies in places, extending the account capacity if necessary but
|
|
// never reducing it. This is required as the account migh be directly
|
|
// mapped into a MemoryRegion, and therefore reducing capacity would
|
|
// leave a hole in the vm address space. After CPI or upon program
|
|
// termination, the runtime will zero the extra capacity.
|
|
self.make_data_mut();
|
|
self.account.set_data_from_slice(data);
|
|
|
|
Ok(())
|
|
}
|
|
|
|
/// Resizes the account data (transaction wide)
|
|
///
|
|
/// Fills it with zeros at the end if is extended or truncates at the end otherwise.
|
|
#[cfg(not(target_os = "solana"))]
|
|
pub fn set_data_length(&mut self, new_length: usize) -> Result<(), InstructionError> {
|
|
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()?;
|
|
self.update_accounts_resize_delta(new_length)?;
|
|
self.account.resize(new_length, 0);
|
|
Ok(())
|
|
}
|
|
|
|
/// Appends all elements in a slice to the account
|
|
#[cfg(not(target_os = "solana"))]
|
|
pub fn extend_from_slice(&mut self, data: &[u8]) -> Result<(), InstructionError> {
|
|
let new_len = self.get_data().len().saturating_add(data.len());
|
|
self.can_data_be_resized(new_len)?;
|
|
self.can_data_be_changed()?;
|
|
|
|
if data.is_empty() {
|
|
return Ok(());
|
|
}
|
|
|
|
self.touch()?;
|
|
self.update_accounts_resize_delta(new_len)?;
|
|
// Even if extend_from_slice never reduces capacity, still realloc using
|
|
// make_data_mut() if necessary so that we grow the account of the full
|
|
// max realloc length in one go, avoiding smaller reallocations.
|
|
self.make_data_mut();
|
|
self.account.extend_from_slice(data);
|
|
Ok(())
|
|
}
|
|
|
|
/// Reserves capacity for at least additional more elements to be inserted
|
|
/// in the given account. Does nothing if capacity is already sufficient.
|
|
#[cfg(not(target_os = "solana"))]
|
|
pub fn reserve(&mut self, additional: usize) -> Result<(), InstructionError> {
|
|
// Note that we don't need to call can_data_be_changed() here nor
|
|
// touch() the account. reserve() only changes the capacity of the
|
|
// memory that holds the account but it doesn't actually change content
|
|
// nor length of the account.
|
|
self.make_data_mut();
|
|
self.account.reserve(additional);
|
|
|
|
Ok(())
|
|
}
|
|
|
|
/// Returns the number of bytes the account can hold without reallocating.
|
|
#[cfg(not(target_os = "solana"))]
|
|
pub fn capacity(&self) -> usize {
|
|
self.account.capacity()
|
|
}
|
|
|
|
/// Returns whether the underlying AccountSharedData is shared.
|
|
///
|
|
/// The data is shared if the account has been loaded from the accounts database and has never
|
|
/// been written to. Writing to an account unshares it.
|
|
///
|
|
/// During account serialization, if an account is shared it'll get mapped as CoW, else it'll
|
|
/// get mapped directly as writable.
|
|
#[cfg(not(target_os = "solana"))]
|
|
pub fn is_shared(&self) -> bool {
|
|
self.account.is_shared()
|
|
}
|
|
|
|
#[cfg(not(target_os = "solana"))]
|
|
fn make_data_mut(&mut self) {
|
|
// if the account is still shared, it means this is the first time we're
|
|
// about to write into it. Make the account mutable by copying it in a
|
|
// buffer with MAX_PERMITTED_DATA_INCREASE capacity so that if the
|
|
// transaction reallocs, we don't have to copy the whole account data a
|
|
// second time to fullfill the realloc.
|
|
//
|
|
// NOTE: The account memory region CoW code in bpf_loader::create_vm() implements the same
|
|
// logic and must be kept in sync.
|
|
if self.account.is_shared() {
|
|
self.account.reserve(MAX_PERMITTED_DATA_INCREASE);
|
|
}
|
|
}
|
|
|
|
/// Deserializes the account data into a state
|
|
#[cfg(not(target_os = "solana"))]
|
|
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
|
|
#[cfg(not(target_os = "solana"))]
|
|
pub fn set_state<T: serde::Serialize>(&mut self, state: &T) -> Result<(), InstructionError> {
|
|
let data = self.get_data_mut()?;
|
|
let serialized_size =
|
|
bincode::serialized_size(state).map_err(|_| InstructionError::GenericError)?;
|
|
if serialized_size > data.len() as u64 {
|
|
return Err(InstructionError::AccountDataTooSmall);
|
|
}
|
|
bincode::serialize_into(&mut *data, state).map_err(|_| InstructionError::GenericError)?;
|
|
Ok(())
|
|
}
|
|
|
|
// Returns whether or the lamports currently in the account is sufficient for rent exemption should the
|
|
// data be resized to the given size
|
|
#[cfg(not(target_os = "solana"))]
|
|
pub fn is_rent_exempt_at_data_length(&self, data_length: usize) -> bool {
|
|
self.transaction_context
|
|
.rent
|
|
.unwrap_or_default()
|
|
.is_exempt(self.get_lamports(), data_length)
|
|
}
|
|
|
|
/// Returns whether this account is executable (transaction wide)
|
|
#[inline]
|
|
pub fn is_executable(&self) -> bool {
|
|
self.account.executable()
|
|
}
|
|
|
|
/// Configures whether this account is executable (transaction wide)
|
|
#[cfg(not(target_os = "solana"))]
|
|
pub fn set_executable(&mut self, is_executable: bool) -> Result<(), InstructionError> {
|
|
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()?;
|
|
}
|
|
self.account.set_executable(is_executable);
|
|
Ok(())
|
|
}
|
|
|
|
/// Returns the rent epoch of this account (transaction wide)
|
|
#[cfg(not(target_os = "solana"))]
|
|
#[inline]
|
|
pub fn get_rent_epoch(&self) -> u64 {
|
|
self.account.rent_epoch()
|
|
}
|
|
|
|
/// Returns whether this account is a signer (instruction wide)
|
|
pub fn is_signer(&self) -> bool {
|
|
if self.index_in_instruction < self.instruction_context.get_number_of_program_accounts() {
|
|
return false;
|
|
}
|
|
self.instruction_context
|
|
.is_instruction_account_signer(
|
|
self.index_in_instruction
|
|
.saturating_sub(self.instruction_context.get_number_of_program_accounts()),
|
|
)
|
|
.unwrap_or_default()
|
|
}
|
|
|
|
/// Returns whether this account is writable (instruction wide)
|
|
pub fn is_writable(&self) -> bool {
|
|
if self.index_in_instruction < self.instruction_context.get_number_of_program_accounts() {
|
|
return false;
|
|
}
|
|
self.instruction_context
|
|
.is_instruction_account_writable(
|
|
self.index_in_instruction
|
|
.saturating_sub(self.instruction_context.get_number_of_program_accounts()),
|
|
)
|
|
.unwrap_or_default()
|
|
}
|
|
|
|
/// 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
|
|
#[cfg(not(target_os = "solana"))]
|
|
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
|
|
#[cfg(not(target_os = "solana"))]
|
|
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(());
|
|
}
|
|
let old_length = self.get_data().len();
|
|
// Only the owner can change the length of the data
|
|
if new_length != old_length && !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);
|
|
}
|
|
if self
|
|
.transaction_context
|
|
.is_cap_accounts_data_allocations_per_transaction_enabled
|
|
{
|
|
// The resize can not exceed the per-transaction maximum
|
|
let length_delta = (new_length as i64).saturating_sub(old_length as i64);
|
|
if self
|
|
.transaction_context
|
|
.accounts_resize_delta()?
|
|
.saturating_add(length_delta)
|
|
> MAX_PERMITTED_ACCOUNTS_DATA_ALLOCATIONS_PER_TRANSACTION
|
|
{
|
|
return Err(InstructionError::MaxAccountsDataAllocationsExceeded);
|
|
}
|
|
}
|
|
Ok(())
|
|
}
|
|
|
|
#[cfg(not(target_os = "solana"))]
|
|
fn touch(&self) -> Result<(), InstructionError> {
|
|
self.transaction_context
|
|
.accounts()
|
|
.touch(self.index_in_transaction)
|
|
}
|
|
|
|
#[cfg(not(target_os = "solana"))]
|
|
fn update_accounts_resize_delta(&mut self, new_len: usize) -> Result<(), InstructionError> {
|
|
let mut accounts_resize_delta = self
|
|
.transaction_context
|
|
.accounts_resize_delta
|
|
.try_borrow_mut()
|
|
.map_err(|_| InstructionError::GenericError)?;
|
|
*accounts_resize_delta = accounts_resize_delta
|
|
.saturating_add((new_len as i64).saturating_sub(self.get_data().len() as i64));
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
/// Everything that needs to be recorded from a TransactionContext after execution
|
|
#[cfg(not(target_os = "solana"))]
|
|
pub struct ExecutionRecord {
|
|
pub accounts: Vec<TransactionAccount>,
|
|
pub return_data: TransactionReturnData,
|
|
pub touched_account_count: u64,
|
|
pub accounts_resize_delta: i64,
|
|
}
|
|
|
|
/// Used by the bank in the runtime to write back the processed accounts and recorded instructions
|
|
#[cfg(not(target_os = "solana"))]
|
|
impl From<TransactionContext> for ExecutionRecord {
|
|
fn from(context: TransactionContext) -> Self {
|
|
let accounts = Rc::try_unwrap(context.accounts)
|
|
.expect("transaction_context.accounts has unexpectd outstanding refs");
|
|
let touched_account_count = accounts.touched_count() as u64;
|
|
let accounts = accounts.into_accounts();
|
|
Self {
|
|
accounts: Vec::from(Pin::into_inner(context.account_keys))
|
|
.into_iter()
|
|
.zip(accounts)
|
|
.collect(),
|
|
return_data: context.return_data,
|
|
touched_account_count,
|
|
accounts_resize_delta: RefCell::into_inner(context.accounts_resize_delta),
|
|
}
|
|
}
|
|
}
|
|
|
|
#[cfg(not(target_os = "solana"))]
|
|
fn is_zeroed(buf: &[u8]) -> bool {
|
|
const ZEROS_LEN: usize = 1024;
|
|
const ZEROS: [u8; ZEROS_LEN] = [0; ZEROS_LEN];
|
|
let mut chunks = buf.chunks_exact(ZEROS_LEN);
|
|
|
|
#[allow(clippy::indexing_slicing)]
|
|
{
|
|
chunks.all(|chunk| chunk == &ZEROS[..])
|
|
&& chunks.remainder() == &ZEROS[..chunks.remainder().len()]
|
|
}
|
|
}
|