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use std::{
collections::hash_map::DefaultHasher,
hash::{Hash, Hasher},
str::FromStr,
};
use anchor_lang::prelude::*;
use chrono::DateTime;
use sablier_cron::Schedule;
use sablier_network_program::state::{Worker, WorkerAccount};
use sablier_utils::{
pyth::{self, PriceUpdateV2},
thread::Trigger,
};
use crate::{constants::*, errors::*, state::*};
/// Accounts required by the `thread_kickoff` instruction.
#[derive(Accounts)]
pub struct ThreadKickoff<'info> {
/// The signatory.
#[account(mut)]
pub signatory: Signer<'info>,
/// The thread to kickoff.
#[account(
mut,
seeds = [
SEED_THREAD,
thread.authority.as_ref(),
thread.id.as_slice(),
thread.domain.as_ref().unwrap_or(&Vec::new()).as_slice()
],
bump = thread.bump,
constraint = !thread.paused @ SablierError::ThreadPaused,
constraint = thread.next_instruction.is_none() @ SablierError::ThreadBusy,
)]
pub thread: Account<'info, Thread>,
/// The worker.
#[account(address = worker.pubkey())]
pub worker: Account<'info, Worker>,
}
pub fn handler(ctx: Context<ThreadKickoff>) -> Result<()> {
// Get accounts.
let signatory = &mut ctx.accounts.signatory;
let thread = &mut ctx.accounts.thread;
let clock = Clock::get()?;
match &thread.trigger {
Trigger::Account {
address,
offset,
size,
} => {
// Verify proof that account data has been updated.
match ctx.remaining_accounts.first() {
None => {
return Err(SablierError::TriggerConditionFailed.into());
}
Some(account_info) => {
// Verify the remaining account is the account this thread is listening for.
require!(
address.eq(account_info.key),
SablierError::TriggerConditionFailed
);
// Begin computing the data hash of this account.
let mut hasher = DefaultHasher::new();
let data = &account_info.try_borrow_data()?;
let offset = *offset as usize;
let range_end = offset + *size as usize;
if data.len().gt(&range_end) {
data[offset..range_end].hash(&mut hasher);
} else {
data[offset..].hash(&mut hasher)
}
let data_hash = hasher.finish();
// Verify the data hash is different than the prior data hash.
if let Some(exec_context) = thread.exec_context {
match exec_context.trigger_context {
TriggerContext::Account {
data_hash: prior_data_hash,
} => {
require!(
data_hash.ne(&prior_data_hash),
SablierError::TriggerConditionFailed
)
}
_ => return Err(SablierError::InvalidThreadState.into()),
}
}
// Set a new exec context with the new data hash and slot number.
thread.exec_context = Some(ExecContext {
exec_index: 0,
execs_since_reimbursement: 0,
execs_since_slot: 0,
last_exec_at: clock.slot,
trigger_context: TriggerContext::Account { data_hash },
})
}
}
}
Trigger::Cron {
schedule,
skippable,
} => {
// Get the reference timestamp for calculating the thread's scheduled target timestamp.
let reference_timestamp = match thread.exec_context {
None => thread.created_at.unix_timestamp,
Some(exec_context) => match exec_context.trigger_context {
TriggerContext::Cron { started_at } => started_at,
_ => return Err(SablierError::InvalidThreadState.into()),
},
};
// Verify the current timestamp is greater than or equal to the threshold timestamp.
let threshold_timestamp = next_timestamp(reference_timestamp, schedule)
.ok_or(SablierError::TriggerConditionFailed)?;
msg!(
"Threshold timestamp: {}, clock timestamp: {}",
threshold_timestamp,
clock.unix_timestamp
);
require!(
clock.unix_timestamp.ge(&threshold_timestamp),
SablierError::TriggerConditionFailed
);
// If the schedule is marked as skippable, set the started_at of the exec context to be the current timestamp.
// Otherwise, the exec context must iterate through each scheduled kickoff moment.
let started_at = if *skippable {
clock.unix_timestamp
} else {
threshold_timestamp
};
// Set the exec context.
thread.exec_context = Some(ExecContext {
exec_index: 0,
execs_since_reimbursement: 0,
execs_since_slot: 0,
last_exec_at: clock.slot,
trigger_context: TriggerContext::Cron { started_at },
});
}
Trigger::Now => {
// Set the exec context.
require!(
thread.exec_context.is_none(),
SablierError::InvalidThreadState
);
thread.exec_context = Some(ExecContext {
exec_index: 0,
execs_since_reimbursement: 0,
execs_since_slot: 0,
last_exec_at: clock.slot,
trigger_context: TriggerContext::Now,
});
}
Trigger::Slot { slot } => {
require!(clock.slot.ge(slot), SablierError::TriggerConditionFailed);
thread.exec_context = Some(ExecContext {
exec_index: 0,
execs_since_reimbursement: 0,
execs_since_slot: 0,
last_exec_at: clock.slot,
trigger_context: TriggerContext::Slot { started_at: *slot },
});
}
Trigger::Epoch { epoch } => {
require!(clock.epoch.ge(epoch), SablierError::TriggerConditionFailed);
thread.exec_context = Some(ExecContext {
exec_index: 0,
execs_since_reimbursement: 0,
execs_since_slot: 0,
last_exec_at: clock.slot,
trigger_context: TriggerContext::Epoch { started_at: *epoch },
})
}
Trigger::Timestamp { unix_ts } => {
require!(
clock.unix_timestamp.ge(unix_ts),
SablierError::TriggerConditionFailed
);
thread.exec_context = Some(ExecContext {
exec_index: 0,
execs_since_reimbursement: 0,
execs_since_slot: 0,
last_exec_at: clock.slot,
trigger_context: TriggerContext::Timestamp {
started_at: *unix_ts,
},
})
}
Trigger::Pyth {
feed_id,
equality,
limit,
} => {
// Verify price limit has been reached.
match ctx.remaining_accounts.first() {
None => {
return Err(SablierError::TriggerConditionFailed.into());
}
Some(account_info) => {
require_keys_eq!(
*account_info.owner,
pyth::ID,
SablierError::TriggerConditionFailed
);
const STALENESS_THRESHOLD: u64 = 60; // staleness threshold in seconds
let price_update =
PriceUpdateV2::try_deserialize(&mut account_info.data.borrow().as_ref())?;
let current_price = price_update.get_price_no_older_than(
&Clock::get()?,
STALENESS_THRESHOLD,
feed_id,
)?;
match equality {
Equality::GreaterThanOrEqual => {
require!(
current_price.price.ge(limit),
SablierError::TriggerConditionFailed
);
thread.exec_context = Some(ExecContext {
exec_index: 0,
execs_since_reimbursement: 0,
execs_since_slot: 0,
last_exec_at: clock.slot,
trigger_context: TriggerContext::Pyth {
price: current_price.price,
},
});
}
Equality::LessThanOrEqual => {
require!(
current_price.price.le(limit),
SablierError::TriggerConditionFailed
);
thread.exec_context = Some(ExecContext {
exec_index: 0,
execs_since_reimbursement: 0,
execs_since_slot: 0,
last_exec_at: clock.slot,
trigger_context: TriggerContext::Pyth {
price: current_price.price,
},
});
}
}
}
}
}
Trigger::Periodic { delay } => {
// Get the reference timestamp for calculating the thread's scheduled target timestamp.
let reference_timestamp = match thread.exec_context {
None => thread.created_at.unix_timestamp,
Some(exec_context) => match exec_context.trigger_context {
TriggerContext::Periodic { started_at } => started_at,
_ => return Err(SablierError::InvalidThreadState.into()),
},
};
// Verify the current timestamp is greater than or equal to the threshold timestamp.
let threshold_timestamp = reference_timestamp + *delay as i64;
msg!(
"Threshold timestamp: {}, clock timestamp: {}",
threshold_timestamp,
clock.unix_timestamp
);
require!(
clock.unix_timestamp.ge(&threshold_timestamp),
SablierError::TriggerConditionFailed
);
// Set the exec context.
thread.exec_context = Some(ExecContext {
exec_index: 0,
execs_since_reimbursement: 0,
execs_since_slot: 0,
last_exec_at: clock.slot,
trigger_context: TriggerContext::Periodic {
started_at: threshold_timestamp,
},
});
}
}
// If we make it here, the trigger is active. Update the next instruction and be done.
if let Some(kickoff_instruction) = thread.instructions.first() {
thread.next_instruction = Some(kickoff_instruction.clone());
}
// Realloc the thread account
thread.realloc_account()?;
// Reimburse signatory for transaction fee.
thread.sub_lamports(TRANSACTION_BASE_FEE_REIMBURSEMENT)?;
signatory.add_lamports(TRANSACTION_BASE_FEE_REIMBURSEMENT)?;
Ok(())
}
fn next_timestamp(after: i64, schedule: &str) -> Option<i64> {
Schedule::from_str(schedule)
.unwrap()
.next_after(&DateTime::from_timestamp(after, 0).unwrap())
.take()
.map(|datetime| datetime.timestamp())
}