452 lines
18 KiB
Rust
452 lines
18 KiB
Rust
use {
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crate::{
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instruction::ProgramInstruction,
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state::{
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AddressLookupTable, LookupTableMeta, LookupTableStatus, ProgramState,
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LOOKUP_TABLE_MAX_ADDRESSES, LOOKUP_TABLE_META_SIZE,
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},
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},
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solana_program_runtime::{ic_msg, invoke_context::InvokeContext},
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solana_sdk::{
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clock::Slot,
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instruction::InstructionError,
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program_utils::limited_deserialize,
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pubkey::{Pubkey, PUBKEY_BYTES},
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system_instruction,
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},
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std::convert::TryFrom,
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};
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pub fn process_instruction(
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_first_instruction_account: usize,
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invoke_context: &mut InvokeContext,
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) -> Result<(), InstructionError> {
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let transaction_context = &invoke_context.transaction_context;
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let instruction_context = transaction_context.get_current_instruction_context()?;
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let instruction_data = instruction_context.get_instruction_data();
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match limited_deserialize(instruction_data)? {
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ProgramInstruction::CreateLookupTable {
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recent_slot,
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bump_seed,
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} => Processor::create_lookup_table(invoke_context, recent_slot, bump_seed),
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ProgramInstruction::FreezeLookupTable => Processor::freeze_lookup_table(invoke_context),
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ProgramInstruction::ExtendLookupTable { new_addresses } => {
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Processor::extend_lookup_table(invoke_context, new_addresses)
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}
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ProgramInstruction::DeactivateLookupTable => {
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Processor::deactivate_lookup_table(invoke_context)
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}
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ProgramInstruction::CloseLookupTable => Processor::close_lookup_table(invoke_context),
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}
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}
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fn checked_add(a: usize, b: usize) -> Result<usize, InstructionError> {
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a.checked_add(b).ok_or(InstructionError::ArithmeticOverflow)
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}
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pub struct Processor;
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impl Processor {
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fn create_lookup_table(
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invoke_context: &mut InvokeContext,
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untrusted_recent_slot: Slot,
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bump_seed: u8,
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) -> Result<(), InstructionError> {
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let transaction_context = &invoke_context.transaction_context;
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let instruction_context = transaction_context.get_current_instruction_context()?;
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let lookup_table_account =
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instruction_context.try_borrow_instruction_account(transaction_context, 0)?;
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let lookup_table_lamports = lookup_table_account.get_lamports();
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let table_key = *lookup_table_account.get_key();
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if !lookup_table_account.get_data().is_empty() {
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ic_msg!(invoke_context, "Table account must not be allocated");
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return Err(InstructionError::AccountAlreadyInitialized);
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}
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drop(lookup_table_account);
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let authority_account =
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instruction_context.try_borrow_instruction_account(transaction_context, 1)?;
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let authority_key = *authority_account.get_key();
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if !authority_account.is_signer() {
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ic_msg!(invoke_context, "Authority account must be a signer");
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return Err(InstructionError::MissingRequiredSignature);
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}
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drop(authority_account);
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let payer_account =
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instruction_context.try_borrow_instruction_account(transaction_context, 2)?;
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let payer_key = *payer_account.get_key();
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if !payer_account.is_signer() {
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ic_msg!(invoke_context, "Payer account must be a signer");
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return Err(InstructionError::MissingRequiredSignature);
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}
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drop(payer_account);
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let derivation_slot = {
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let slot_hashes = invoke_context.get_sysvar_cache().get_slot_hashes()?;
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if slot_hashes.get(&untrusted_recent_slot).is_some() {
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Ok(untrusted_recent_slot)
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} else {
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ic_msg!(
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invoke_context,
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"{} is not a recent slot",
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untrusted_recent_slot
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);
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Err(InstructionError::InvalidInstructionData)
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}
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}?;
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// Use a derived address to ensure that an address table can never be
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// initialized more than once at the same address.
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let derived_table_key = Pubkey::create_program_address(
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&[
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authority_key.as_ref(),
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&derivation_slot.to_le_bytes(),
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&[bump_seed],
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],
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&crate::id(),
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)?;
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if table_key != derived_table_key {
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ic_msg!(
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invoke_context,
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"Table address must match derived address: {}",
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derived_table_key
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);
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return Err(InstructionError::InvalidArgument);
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}
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let table_account_data_len = LOOKUP_TABLE_META_SIZE;
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let rent = invoke_context.get_sysvar_cache().get_rent()?;
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let required_lamports = rent
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.minimum_balance(table_account_data_len)
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.max(1)
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.saturating_sub(lookup_table_lamports);
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if required_lamports > 0 {
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invoke_context.native_invoke(
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system_instruction::transfer(&payer_key, &table_key, required_lamports),
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&[payer_key],
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)?;
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}
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invoke_context.native_invoke(
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system_instruction::allocate(&table_key, table_account_data_len as u64),
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&[table_key],
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)?;
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invoke_context.native_invoke(
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system_instruction::assign(&table_key, &crate::id()),
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&[table_key],
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)?;
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let transaction_context = &invoke_context.transaction_context;
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let instruction_context = transaction_context.get_current_instruction_context()?;
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let mut lookup_table_account =
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instruction_context.try_borrow_instruction_account(transaction_context, 0)?;
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lookup_table_account.set_state(&ProgramState::LookupTable(LookupTableMeta::new(
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authority_key,
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)))?;
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Ok(())
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}
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fn freeze_lookup_table(invoke_context: &mut InvokeContext) -> Result<(), InstructionError> {
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let transaction_context = &invoke_context.transaction_context;
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let instruction_context = transaction_context.get_current_instruction_context()?;
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let lookup_table_account =
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instruction_context.try_borrow_instruction_account(transaction_context, 0)?;
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if *lookup_table_account.get_owner() != crate::id() {
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return Err(InstructionError::InvalidAccountOwner);
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}
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drop(lookup_table_account);
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let authority_account =
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instruction_context.try_borrow_instruction_account(transaction_context, 1)?;
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let authority_key = *authority_account.get_key();
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if !authority_account.is_signer() {
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ic_msg!(invoke_context, "Authority account must be a signer");
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return Err(InstructionError::MissingRequiredSignature);
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}
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drop(authority_account);
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let mut lookup_table_account =
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instruction_context.try_borrow_instruction_account(transaction_context, 0)?;
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let lookup_table_data = lookup_table_account.get_data();
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let lookup_table = AddressLookupTable::deserialize(lookup_table_data)?;
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if lookup_table.meta.authority.is_none() {
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ic_msg!(invoke_context, "Lookup table is already frozen");
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return Err(InstructionError::Immutable);
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}
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if lookup_table.meta.authority != Some(authority_key) {
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return Err(InstructionError::IncorrectAuthority);
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}
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if lookup_table.meta.deactivation_slot != Slot::MAX {
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ic_msg!(invoke_context, "Deactivated tables cannot be frozen");
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return Err(InstructionError::InvalidArgument);
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}
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if lookup_table.addresses.is_empty() {
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ic_msg!(invoke_context, "Empty lookup tables cannot be frozen");
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return Err(InstructionError::InvalidInstructionData);
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}
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let mut lookup_table_meta = lookup_table.meta;
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lookup_table_meta.authority = None;
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AddressLookupTable::overwrite_meta_data(
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lookup_table_account.get_data_mut()?,
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lookup_table_meta,
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)?;
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Ok(())
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}
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fn extend_lookup_table(
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invoke_context: &mut InvokeContext,
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new_addresses: Vec<Pubkey>,
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) -> Result<(), InstructionError> {
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let transaction_context = &invoke_context.transaction_context;
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let instruction_context = transaction_context.get_current_instruction_context()?;
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let lookup_table_account =
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instruction_context.try_borrow_instruction_account(transaction_context, 0)?;
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let table_key = *lookup_table_account.get_key();
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if *lookup_table_account.get_owner() != crate::id() {
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return Err(InstructionError::InvalidAccountOwner);
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}
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drop(lookup_table_account);
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let authority_account =
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instruction_context.try_borrow_instruction_account(transaction_context, 1)?;
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let authority_key = *authority_account.get_key();
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if !authority_account.is_signer() {
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ic_msg!(invoke_context, "Authority account must be a signer");
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return Err(InstructionError::MissingRequiredSignature);
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}
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drop(authority_account);
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let mut lookup_table_account =
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instruction_context.try_borrow_instruction_account(transaction_context, 0)?;
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let lookup_table_data = lookup_table_account.get_data();
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let lookup_table_lamports = lookup_table_account.get_lamports();
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let mut lookup_table = AddressLookupTable::deserialize(lookup_table_data)?;
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if lookup_table.meta.authority.is_none() {
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return Err(InstructionError::Immutable);
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}
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if lookup_table.meta.authority != Some(authority_key) {
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return Err(InstructionError::IncorrectAuthority);
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}
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if lookup_table.meta.deactivation_slot != Slot::MAX {
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ic_msg!(invoke_context, "Deactivated tables cannot be extended");
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return Err(InstructionError::InvalidArgument);
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}
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if lookup_table.addresses.len() >= LOOKUP_TABLE_MAX_ADDRESSES {
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ic_msg!(
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invoke_context,
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"Lookup table is full and cannot contain more addresses"
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);
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return Err(InstructionError::InvalidArgument);
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}
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if new_addresses.is_empty() {
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ic_msg!(invoke_context, "Must extend with at least one address");
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return Err(InstructionError::InvalidInstructionData);
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}
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let new_table_addresses_len = lookup_table
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.addresses
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.len()
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.saturating_add(new_addresses.len());
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if new_table_addresses_len > LOOKUP_TABLE_MAX_ADDRESSES {
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ic_msg!(
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invoke_context,
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"Extended lookup table length {} would exceed max capacity of {}",
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new_table_addresses_len,
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LOOKUP_TABLE_MAX_ADDRESSES
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);
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return Err(InstructionError::InvalidInstructionData);
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}
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let clock = invoke_context.get_sysvar_cache().get_clock()?;
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if clock.slot != lookup_table.meta.last_extended_slot {
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lookup_table.meta.last_extended_slot = clock.slot;
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lookup_table.meta.last_extended_slot_start_index =
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u8::try_from(lookup_table.addresses.len()).map_err(|_| {
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// This is impossible as long as the length of new_addresses
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// is non-zero and LOOKUP_TABLE_MAX_ADDRESSES == u8::MAX + 1.
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InstructionError::InvalidAccountData
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})?;
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}
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let lookup_table_meta = lookup_table.meta;
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let new_table_data_len = checked_add(
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LOOKUP_TABLE_META_SIZE,
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new_table_addresses_len.saturating_mul(PUBKEY_BYTES),
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)?;
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{
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let mut table_data = lookup_table_account.get_data_mut()?.to_vec();
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AddressLookupTable::overwrite_meta_data(&mut table_data, lookup_table_meta)?;
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for new_address in new_addresses {
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table_data.extend_from_slice(new_address.as_ref());
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}
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lookup_table_account.set_data(&table_data)?;
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}
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drop(lookup_table_account);
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let rent = invoke_context.get_sysvar_cache().get_rent()?;
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let required_lamports = rent
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.minimum_balance(new_table_data_len)
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.max(1)
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.saturating_sub(lookup_table_lamports);
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if required_lamports > 0 {
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let payer_account =
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instruction_context.try_borrow_instruction_account(transaction_context, 2)?;
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let payer_key = *payer_account.get_key();
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if !payer_account.is_signer() {
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ic_msg!(invoke_context, "Payer account must be a signer");
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return Err(InstructionError::MissingRequiredSignature);
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}
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drop(payer_account);
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invoke_context.native_invoke(
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system_instruction::transfer(&payer_key, &table_key, required_lamports),
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&[payer_key],
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)?;
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}
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Ok(())
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}
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fn deactivate_lookup_table(invoke_context: &mut InvokeContext) -> Result<(), InstructionError> {
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let transaction_context = &invoke_context.transaction_context;
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let instruction_context = transaction_context.get_current_instruction_context()?;
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let lookup_table_account =
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instruction_context.try_borrow_instruction_account(transaction_context, 0)?;
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if *lookup_table_account.get_owner() != crate::id() {
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return Err(InstructionError::InvalidAccountOwner);
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}
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drop(lookup_table_account);
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let authority_account =
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instruction_context.try_borrow_instruction_account(transaction_context, 1)?;
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let authority_key = *authority_account.get_key();
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if !authority_account.is_signer() {
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ic_msg!(invoke_context, "Authority account must be a signer");
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return Err(InstructionError::MissingRequiredSignature);
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}
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drop(authority_account);
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let mut lookup_table_account =
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instruction_context.try_borrow_instruction_account(transaction_context, 0)?;
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let lookup_table_data = lookup_table_account.get_data();
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let lookup_table = AddressLookupTable::deserialize(lookup_table_data)?;
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if lookup_table.meta.authority.is_none() {
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ic_msg!(invoke_context, "Lookup table is frozen");
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return Err(InstructionError::Immutable);
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}
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if lookup_table.meta.authority != Some(authority_key) {
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return Err(InstructionError::IncorrectAuthority);
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}
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if lookup_table.meta.deactivation_slot != Slot::MAX {
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ic_msg!(invoke_context, "Lookup table is already deactivated");
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return Err(InstructionError::InvalidArgument);
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}
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let mut lookup_table_meta = lookup_table.meta;
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let clock = invoke_context.get_sysvar_cache().get_clock()?;
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lookup_table_meta.deactivation_slot = clock.slot;
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AddressLookupTable::overwrite_meta_data(
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lookup_table_account.get_data_mut()?,
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lookup_table_meta,
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)?;
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Ok(())
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}
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fn close_lookup_table(invoke_context: &mut InvokeContext) -> Result<(), InstructionError> {
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let transaction_context = &invoke_context.transaction_context;
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let instruction_context = transaction_context.get_current_instruction_context()?;
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let lookup_table_account =
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instruction_context.try_borrow_instruction_account(transaction_context, 0)?;
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if *lookup_table_account.get_owner() != crate::id() {
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return Err(InstructionError::InvalidAccountOwner);
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}
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drop(lookup_table_account);
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let authority_account =
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instruction_context.try_borrow_instruction_account(transaction_context, 1)?;
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let authority_key = *authority_account.get_key();
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if !authority_account.is_signer() {
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ic_msg!(invoke_context, "Authority account must be a signer");
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return Err(InstructionError::MissingRequiredSignature);
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}
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drop(authority_account);
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instruction_context.check_number_of_instruction_accounts(3)?;
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if instruction_context.get_index_of_instruction_account_in_transaction(0)?
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== instruction_context.get_index_of_instruction_account_in_transaction(2)?
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{
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ic_msg!(
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invoke_context,
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"Lookup table cannot be the recipient of reclaimed lamports"
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);
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return Err(InstructionError::InvalidArgument);
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}
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let lookup_table_account =
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instruction_context.try_borrow_instruction_account(transaction_context, 0)?;
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let withdrawn_lamports = lookup_table_account.get_lamports();
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let lookup_table_data = lookup_table_account.get_data();
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let lookup_table = AddressLookupTable::deserialize(lookup_table_data)?;
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if lookup_table.meta.authority.is_none() {
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ic_msg!(invoke_context, "Lookup table is frozen");
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return Err(InstructionError::Immutable);
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}
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if lookup_table.meta.authority != Some(authority_key) {
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return Err(InstructionError::IncorrectAuthority);
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}
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let sysvar_cache = invoke_context.get_sysvar_cache();
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let clock = sysvar_cache.get_clock()?;
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let slot_hashes = sysvar_cache.get_slot_hashes()?;
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match lookup_table.meta.status(clock.slot, &slot_hashes) {
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LookupTableStatus::Activated => {
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ic_msg!(invoke_context, "Lookup table is not deactivated");
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Err(InstructionError::InvalidArgument)
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}
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LookupTableStatus::Deactivating { remaining_blocks } => {
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ic_msg!(
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invoke_context,
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"Table cannot be closed until it's fully deactivated in {} blocks",
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remaining_blocks
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);
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Err(InstructionError::InvalidArgument)
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}
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LookupTableStatus::Deactivated => Ok(()),
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}?;
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drop(lookup_table_account);
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let mut recipient_account =
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instruction_context.try_borrow_instruction_account(transaction_context, 2)?;
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recipient_account.checked_add_lamports(withdrawn_lamports)?;
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drop(recipient_account);
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let mut lookup_table_account =
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instruction_context.try_borrow_instruction_account(transaction_context, 0)?;
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lookup_table_account.set_data(&[])?;
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lookup_table_account.set_lamports(0)?;
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Ok(())
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}
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}
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