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processor.rs
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processor.rs
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use solana_program::{
account_info::{next_account_info, AccountInfo},
decode_error::DecodeError,
entrypoint::ProgramResult,
msg,
program::{invoke, invoke_signed},
program_error::PrintProgramError,
program_error::ProgramError,
program_pack::Pack,
pubkey::Pubkey,
rent::Rent,
system_instruction::create_account,
sysvar::{clock::Clock, Sysvar},
};
use num_traits::FromPrimitive;
use spl_token::{instruction::transfer, state::Account};
use crate::{
error::VestingError,
instruction::{Schedule, VestingInstruction, SCHEDULE_SIZE},
state::{pack_schedules_into_slice, unpack_schedules, VestingSchedule, VestingScheduleHeader},
};
pub struct Processor {}
impl Processor {
pub fn process_init(
program_id: &Pubkey,
accounts: &[AccountInfo],
seeds: [u8; 32],
schedules: u32
) -> ProgramResult {
let accounts_iter = &mut accounts.iter();
let system_program_account = next_account_info(accounts_iter)?;
let rent_sysvar_account = next_account_info(accounts_iter)?;
let payer = next_account_info(accounts_iter)?;
let vesting_account = next_account_info(accounts_iter)?;
let rent = Rent::from_account_info(rent_sysvar_account)?;
// Find the non reversible public key for the vesting contract via the seed
let vesting_account_key = Pubkey::create_program_address(&[&seeds], &program_id).unwrap();
if vesting_account_key != *vesting_account.key {
msg!("Provided vesting account is invalid");
return Err(ProgramError::InvalidArgument);
}
let state_size = (schedules as usize) * VestingSchedule::LEN + VestingScheduleHeader::LEN;
let init_vesting_account = create_account(
&payer.key,
&vesting_account_key,
rent.minimum_balance(state_size),
state_size as u64,
&program_id,
);
invoke_signed(
&init_vesting_account,
&[
system_program_account.clone(),
payer.clone(),
vesting_account.clone(),
],
&[&[&seeds]],
)?;
Ok(())
}
pub fn process_create(
program_id: &Pubkey,
accounts: &[AccountInfo],
seeds: [u8; 32],
mint_address: &Pubkey,
destination_token_address: &Pubkey,
schedules: Vec<Schedule>,
) -> ProgramResult {
let accounts_iter = &mut accounts.iter();
let spl_token_account = next_account_info(accounts_iter)?;
let vesting_account = next_account_info(accounts_iter)?;
let vesting_token_account = next_account_info(accounts_iter)?;
let source_token_account_owner = next_account_info(accounts_iter)?;
let source_token_account = next_account_info(accounts_iter)?;
let vesting_account_key = Pubkey::create_program_address(&[&seeds], program_id)?;
if vesting_account_key != *vesting_account.key {
msg!("Provided vesting account is invalid");
return Err(ProgramError::InvalidArgument);
}
if !source_token_account_owner.is_signer {
msg!("Source token account owner should be a signer.");
return Err(ProgramError::InvalidArgument);
}
if *vesting_account.owner != *program_id {
msg!("Program should own vesting account");
return Err(ProgramError::InvalidArgument);
}
// Verifying that no SVC was already created with this seed
let is_initialized =
vesting_account.try_borrow_data()?[VestingScheduleHeader::LEN - 1] == 1;
if is_initialized {
msg!("Cannot overwrite an existing vesting contract.");
return Err(ProgramError::InvalidArgument);
}
let vesting_token_account_data = Account::unpack(&vesting_token_account.data.borrow())?;
if vesting_token_account_data.owner != vesting_account_key {
msg!("The vesting token account should be owned by the vesting account.");
return Err(ProgramError::InvalidArgument);
}
if vesting_token_account_data.delegate.is_some() {
msg!("The vesting token account should not have a delegate authority");
return Err(ProgramError::InvalidAccountData);
}
if vesting_token_account_data.close_authority.is_some() {
msg!("The vesting token account should not have a close authority");
return Err(ProgramError::InvalidAccountData);
}
let state_header = VestingScheduleHeader {
destination_address: *destination_token_address,
mint_address: *mint_address,
is_initialized: true,
};
let mut data = vesting_account.data.borrow_mut();
if data.len() != VestingScheduleHeader::LEN + schedules.len() * VestingSchedule::LEN {
return Err(ProgramError::InvalidAccountData)
}
state_header.pack_into_slice(&mut data);
let mut offset = VestingScheduleHeader::LEN;
let mut total_amount: u64 = 0;
for s in schedules.iter() {
let state_schedule = VestingSchedule {
release_time: s.release_time,
amount: s.amount,
};
state_schedule.pack_into_slice(&mut data[offset..]);
let delta = total_amount.checked_add(s.amount);
match delta {
Some(n) => total_amount = n,
None => return Err(ProgramError::InvalidInstructionData), // Total amount overflows u64
}
offset += SCHEDULE_SIZE;
}
if Account::unpack(&source_token_account.data.borrow())?.amount < total_amount {
msg!("The source token account has insufficient funds.");
return Err(ProgramError::InsufficientFunds)
};
let transfer_tokens_to_vesting_account = transfer(
spl_token_account.key,
source_token_account.key,
vesting_token_account.key,
source_token_account_owner.key,
&[],
total_amount,
)?;
invoke(
&transfer_tokens_to_vesting_account,
&[
source_token_account.clone(),
vesting_token_account.clone(),
spl_token_account.clone(),
source_token_account_owner.clone(),
],
)?;
Ok(())
}
pub fn process_unlock(
program_id: &Pubkey,
_accounts: &[AccountInfo],
seeds: [u8; 32],
) -> ProgramResult {
let accounts_iter = &mut _accounts.iter();
let spl_token_account = next_account_info(accounts_iter)?;
let clock_sysvar_account = next_account_info(accounts_iter)?;
let vesting_account = next_account_info(accounts_iter)?;
let vesting_token_account = next_account_info(accounts_iter)?;
let destination_token_account = next_account_info(accounts_iter)?;
let vesting_account_key = Pubkey::create_program_address(&[&seeds], program_id)?;
if vesting_account_key != *vesting_account.key {
msg!("Invalid vesting account key");
return Err(ProgramError::InvalidArgument);
}
if spl_token_account.key != &spl_token::id() {
msg!("The provided spl token program account is invalid");
return Err(ProgramError::InvalidArgument)
}
let packed_state = &vesting_account.data;
let header_state =
VestingScheduleHeader::unpack(&packed_state.borrow()[..VestingScheduleHeader::LEN])?;
if header_state.destination_address != *destination_token_account.key {
msg!("Contract destination account does not matched provided account");
return Err(ProgramError::InvalidArgument);
}
let vesting_token_account_data = Account::unpack(&vesting_token_account.data.borrow())?;
if vesting_token_account_data.owner != vesting_account_key {
msg!("The vesting token account should be owned by the vesting account.");
return Err(ProgramError::InvalidArgument);
}
// Unlock the schedules that have reached maturity
let clock = Clock::from_account_info(&clock_sysvar_account)?;
let mut total_amount_to_transfer = 0;
let mut schedules = unpack_schedules(&packed_state.borrow()[VestingScheduleHeader::LEN..])?;
for s in schedules.iter_mut() {
if clock.unix_timestamp as u64 >= s.release_time {
total_amount_to_transfer += s.amount;
s.amount = 0;
}
}
if total_amount_to_transfer == 0 {
msg!("Vesting contract has not yet reached release time");
return Err(ProgramError::InvalidArgument);
}
let transfer_tokens_from_vesting_account = transfer(
&spl_token_account.key,
&vesting_token_account.key,
destination_token_account.key,
&vesting_account_key,
&[],
total_amount_to_transfer,
)?;
invoke_signed(
&transfer_tokens_from_vesting_account,
&[
spl_token_account.clone(),
vesting_token_account.clone(),
destination_token_account.clone(),
vesting_account.clone(),
],
&[&[&seeds]],
)?;
// Reset released amounts to 0. This makes the simple unlock safe with complex scheduling contracts
pack_schedules_into_slice(
schedules,
&mut packed_state.borrow_mut()[VestingScheduleHeader::LEN..],
);
Ok(())
}
pub fn process_change_destination(
program_id: &Pubkey,
accounts: &[AccountInfo],
seeds: [u8; 32],
) -> ProgramResult {
let accounts_iter = &mut accounts.iter();
let vesting_account = next_account_info(accounts_iter)?;
let destination_token_account = next_account_info(accounts_iter)?;
let destination_token_account_owner = next_account_info(accounts_iter)?;
let new_destination_token_account = next_account_info(accounts_iter)?;
if vesting_account.data.borrow().len() < VestingScheduleHeader::LEN {
return Err(ProgramError::InvalidAccountData)
}
let vesting_account_key = Pubkey::create_program_address(&[&seeds], program_id)?;
let state = VestingScheduleHeader::unpack(
&vesting_account.data.borrow()[..VestingScheduleHeader::LEN],
)?;
if vesting_account_key != *vesting_account.key {
msg!("Invalid vesting account key");
return Err(ProgramError::InvalidArgument);
}
if state.destination_address != *destination_token_account.key {
msg!("Contract destination account does not matched provided account");
return Err(ProgramError::InvalidArgument);
}
if !destination_token_account_owner.is_signer {
msg!("Destination token account owner should be a signer.");
return Err(ProgramError::InvalidArgument);
}
let destination_token_account = Account::unpack(&destination_token_account.data.borrow())?;
if destination_token_account.owner != *destination_token_account_owner.key {
msg!("The current destination token account isn't owned by the provided owner");
return Err(ProgramError::InvalidArgument);
}
let mut new_state = state;
new_state.destination_address = *new_destination_token_account.key;
new_state
.pack_into_slice(&mut vesting_account.data.borrow_mut()[..VestingScheduleHeader::LEN]);
Ok(())
}
pub fn process_instruction(
program_id: &Pubkey,
accounts: &[AccountInfo],
instruction_data: &[u8],
) -> ProgramResult {
msg!("Beginning processing");
let instruction = VestingInstruction::unpack(instruction_data)?;
msg!("Instruction unpacked");
match instruction {
VestingInstruction::Init {
seeds,
number_of_schedules,
} => {
msg!("Instruction: Init");
Self::process_init(program_id, accounts, seeds, number_of_schedules)
}
VestingInstruction::Unlock { seeds } => {
msg!("Instruction: Unlock");
Self::process_unlock(program_id, accounts, seeds)
}
VestingInstruction::ChangeDestination { seeds } => {
msg!("Instruction: Change Destination");
Self::process_change_destination(program_id, accounts, seeds)
}
VestingInstruction::Create {
seeds,
mint_address,
destination_token_address,
schedules,
} => {
msg!("Instruction: Create Schedule");
Self::process_create(
program_id,
accounts,
seeds,
&mint_address,
&destination_token_address,
schedules,
)
}
}
}
}
impl PrintProgramError for VestingError {
fn print<E>(&self)
where
E: 'static + std::error::Error + DecodeError<E> + PrintProgramError + FromPrimitive,
{
match self {
VestingError::InvalidInstruction => msg!("Error: Invalid instruction!"),
}
}
}