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Remove Signature from ApplySignature

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This commit is contained in:
Michael Vines
2018-09-18 18:45:44 -07:00
parent 51e5de4d97
commit 6dee632d67
4 changed files with 54 additions and 122 deletions
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161
src/budget_contract.rs
View File

@@ -4,9 +4,7 @@ use bincode::{self, deserialize, serialize_into, serialized_size};
use chrono::prelude::{DateTime, Utc};
use instruction::{Instruction, Plan};
use payment_plan::{PaymentPlan, Witness};
use signature::{Pubkey, Signature};
use std::collections::hash_map::Entry::Occupied;
use std::collections::HashMap;
use signature::Pubkey;
use std::io;
use transaction::Transaction;
@@ -19,14 +17,13 @@ pub enum BudgetError {
UninitializedContract(Pubkey),
NegativeTokens,
DestinationMissing(Pubkey),
FailedWitness(Signature),
SignatureUnoccupied(Signature),
FailedWitness,
}
#[derive(Serialize, Deserialize, Debug, Clone, Default, PartialEq)]
pub struct BudgetContract {
pub initialized: bool,
pub pending: HashMap<Signature, Plan>,
pub pending_plan: Option<Plan>,
pub last_error: Option<BudgetError>,
}
@@ -35,7 +32,7 @@ pub const BUDGET_CONTRACT_ID: [u8; 32] = [
];
impl BudgetContract {
fn is_pending(&self) -> bool {
!self.pending.is_empty()
self.pending_plan != None
}
pub fn id() -> Pubkey {
Pubkey::new(&BUDGET_CONTRACT_ID)
@@ -48,30 +45,23 @@ impl BudgetContract {
/// will progress one step.
fn apply_signature(
&mut self,
tx: &Transaction,
signature: Signature,
keys: &[Pubkey],
account: &mut [Account],
) -> Result<(), BudgetError> {
if let Occupied(mut e) = self.pending.entry(signature) {
e.get_mut().apply_witness(&Witness::Signature, &tx.keys[0]);
if let Some(payment) = e.get().final_payment() {
if tx.keys.len() > 1 && payment.to == tx.keys[2] {
trace!("apply_witness refund");
//move the tokens back to the from account
account[1].tokens -= payment.tokens;
account[2].tokens += payment.tokens;
e.remove_entry();
} else {
trace!("destination is missing");
return Err(BudgetError::DestinationMissing(payment.to));
}
} else {
trace!("failed apply_witness");
return Err(BudgetError::FailedWitness(signature));
let mut final_payment = None;
if let Some(ref mut plan) = self.pending_plan {
plan.apply_witness(&Witness::Signature, &keys[0]);
final_payment = plan.final_payment();
}
if let Some(payment) = final_payment {
if keys.len() < 2 || payment.to != keys[2] {
trace!("destination missing");
return Err(BudgetError::DestinationMissing(payment.to));
}
} else {
trace!("apply_witness signature unoccupied");
return Err(BudgetError::SignatureUnoccupied(signature));
self.pending_plan = None;
account[1].tokens -= payment.tokens;
account[2].tokens += payment.tokens;
}
Ok(())
}
@@ -80,29 +70,26 @@ impl BudgetContract {
/// will progress one step.
fn apply_timestamp(
&mut self,
tx: &Transaction,
keys: &[Pubkey],
accounts: &mut [Account],
dt: DateTime<Utc>,
) -> Result<(), BudgetError> {
// Check to see if any timelocked transactions can be completed.
let mut completed = vec![];
let mut final_payment = None;
// Hold 'pending' write lock until the end of this function. Otherwise another thread can
// double-spend if it enters before the modified plan is removed from 'pending'.
for (key, plan) in &mut self.pending {
plan.apply_witness(&Witness::Timestamp(dt), &tx.keys[0]);
if let Some(payment) = plan.final_payment() {
if tx.keys.len() < 2 || payment.to != tx.keys[2] {
trace!("destination missing");
return Err(BudgetError::DestinationMissing(payment.to));
}
completed.push(key.clone());
accounts[2].tokens += payment.tokens;
accounts[1].tokens -= payment.tokens;
}
if let Some(ref mut plan) = self.pending_plan {
plan.apply_witness(&Witness::Timestamp(dt), &keys[0]);
final_payment = plan.final_payment();
}
for key in completed {
self.pending.remove(&key);
if let Some(payment) = final_payment {
if keys.len() < 2 || payment.to != keys[2] {
trace!("destination missing");
return Err(BudgetError::DestinationMissing(payment.to));
}
self.pending_plan = None;
accounts[1].tokens -= payment.tokens;
accounts[2].tokens += payment.tokens;
}
Ok(())
}
@@ -157,7 +144,7 @@ impl BudgetContract {
Err(BudgetError::ContractAlreadyExists(tx.keys[1]))
} else {
let mut state = BudgetContract::default();
state.pending.insert(tx.signature, plan);
state.pending_plan = Some(plan);
accounts[1].tokens += contract.tokens;
state.initialized = true;
state.serialize(&mut accounts[1].userdata);
@@ -168,29 +155,28 @@ impl BudgetContract {
Instruction::ApplyTimestamp(dt) => {
let mut state = Self::deserialize(&accounts[1].userdata).unwrap();
if !state.is_pending() {
return Err(BudgetError::ContractNotPending(tx.keys[1]));
}
if !state.initialized {
Err(BudgetError::ContractNotPending(tx.keys[1]))
} else if !state.initialized {
trace!("contract is uninitialized");
Err(BudgetError::UninitializedContract(tx.keys[1]))
} else {
state.apply_timestamp(tx, accounts, *dt)?;
trace!("apply timestamp");
state.apply_timestamp(&tx.keys, accounts, *dt)?;
trace!("apply timestamp committed");
state.serialize(&mut accounts[1].userdata);
Ok(())
}
}
Instruction::ApplySignature(signature) => {
Instruction::ApplySignature => {
let mut state = Self::deserialize(&accounts[1].userdata).unwrap();
if !state.is_pending() {
return Err(BudgetError::ContractNotPending(tx.keys[1]));
}
if !state.initialized {
Err(BudgetError::ContractNotPending(tx.keys[1]))
} else if !state.initialized {
trace!("contract is uninitialized");
Err(BudgetError::UninitializedContract(tx.keys[1]))
} else {
trace!("apply signature");
state.apply_signature(tx, *signature, accounts)?;
state.apply_signature(&tx.keys, accounts)?;
trace!("apply signature committed");
state.serialize(&mut accounts[1].userdata);
Ok(())
@@ -220,7 +206,7 @@ impl BudgetContract {
return Err(Box::new(bincode::ErrorKind::SizeLimit));
}
let len: u64 = deserialize(&input[..8]).unwrap();
if len < 8 {
if len < 3 {
return Err(Box::new(bincode::ErrorKind::SizeLimit));
}
if input.len() < 8 + len as usize {
@@ -256,9 +242,9 @@ impl BudgetContract {
//TODO the contract needs to provide a "get_balance" introspection call of the userdata
pub fn get_balance(account: &Account) -> i64 {
if let Ok(pending) = deserialize(&account.userdata) {
let pending: BudgetContract = pending;
if pending.is_pending() {
if let Ok(state) = deserialize(&account.userdata) {
let state: BudgetContract = state;
if state.is_pending() {
0
} else {
account.tokens
@@ -275,7 +261,7 @@ mod test {
use budget_contract::{BudgetContract, BudgetError};
use chrono::prelude::{DateTime, NaiveDate, Utc};
use hash::Hash;
use signature::{GenKeys, Keypair, KeypairUtil, Pubkey, Signature};
use signature::{GenKeys, Keypair, KeypairUtil, Pubkey};
use transaction::Transaction;
#[test]
fn test_serializer() {
@@ -388,7 +374,6 @@ mod test {
1,
Hash::default(),
);
let sig = tx.signature;
BudgetContract::process_transaction(&tx, &mut accounts);
assert_eq!(accounts[from_account].tokens, 0);
assert_eq!(accounts[contract_account].tokens, 1);
@@ -397,13 +382,8 @@ mod test {
assert!(state.is_pending());
// Attack! try to put the tokens into the wrong account with cancel
let tx = Transaction::budget_new_signature(
&to,
contract.pubkey(),
to.pubkey(),
sig,
Hash::default(),
);
let tx =
Transaction::budget_new_signature(&to, contract.pubkey(), to.pubkey(), Hash::default());
// unit test hack, the `from account` is passed instead of the `to` account to avoid
// creating more account vectors
BudgetContract::process_transaction(&tx, &mut accounts);
@@ -412,34 +392,12 @@ mod test {
assert_eq!(accounts[contract_account].tokens, 1);
// this would be the `to.pubkey()` account
assert_eq!(accounts[pay_account].tokens, 0);
let state = BudgetContract::deserialize(&accounts[contract_account].userdata).unwrap();
assert_eq!(state.last_error, Some(BudgetError::FailedWitness(sig)));
// Attack! try canceling with a bad signature
let badsig = tx.signature;
let tx = Transaction::budget_new_signature(
&from,
contract.pubkey(),
from.pubkey(),
badsig,
Hash::default(),
);
BudgetContract::process_transaction(&tx, &mut accounts);
assert_eq!(accounts[from_account].tokens, 0);
assert_eq!(accounts[contract_account].tokens, 1);
assert_eq!(accounts[pay_account].tokens, 0);
let state = BudgetContract::deserialize(&accounts[contract_account].userdata).unwrap();
assert_eq!(
state.last_error,
Some(BudgetError::SignatureUnoccupied(badsig))
);
// Now, cancel the transaction. from gets her funds back
let tx = Transaction::budget_new_signature(
&from,
contract.pubkey(),
from.pubkey(),
sig,
Hash::default(),
);
BudgetContract::process_transaction(&tx, &mut accounts);
@@ -452,7 +410,6 @@ mod test {
&from,
contract.pubkey(),
from.pubkey(),
sig,
Hash::default(),
);
BudgetContract::process_transaction(&tx, &mut accounts);
@@ -480,11 +437,6 @@ mod test {
2, 2, 2, 4, 5, 6, 7, 8, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 9, 8, 7, 6, 5, 4,
2, 2, 2,
]);
let signature = Signature::new(&[
1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 9, 8, 7,
6, 5, 4, 3, 2, 1,
]);
let date =
DateTime::<Utc>::from_utc(NaiveDate::from_ymd(2016, 7, 8).and_hms(9, 10, 11), Utc);
@@ -535,20 +487,7 @@ mod test {
);
// ApplySignature
let tx = Transaction::budget_new_signature(
&keypair,
keypair.pubkey(),
to,
signature,
Hash::default(),
);
assert_eq!(
tx.userdata,
vec![
2, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 9, 8, 7, 6, 5, 4, 3, 2, 1
]
);
let tx = Transaction::budget_new_signature(&keypair, keypair.pubkey(), to, Hash::default());
assert_eq!(tx.userdata, vec![2, 0, 0, 0]);
}
}

9
src/entry.rs
View File

@@ -256,13 +256,8 @@ mod tests {
Utc::now(),
zero,
);
let tx1 = Transaction::budget_new_signature(
&keypair,
keypair.pubkey(),
keypair.pubkey(),
Default::default(),
zero,
);
let tx1 =
Transaction::budget_new_signature(&keypair, keypair.pubkey(), keypair.pubkey(), zero);
let mut e0 = Entry::new(&zero, 0, vec![tx0.clone(), tx1.clone()], false);
assert!(e0.verify(&zero));

3
src/instruction.rs
View File

@@ -2,7 +2,6 @@ use budget::Budget;
use chrono::prelude::{DateTime, Utc};
use payment_plan::{Payment, PaymentPlan, Witness};
use signature::Pubkey;
use signature::Signature;
/// The type of payment plan. Each item must implement the PaymentPlan trait.
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Clone)]
@@ -61,7 +60,7 @@ pub enum Instruction {
/// Tell the payment plan that the `NewContract` with `Signature` has been
/// signed by the containing transaction's `Pubkey`.
ApplySignature(Signature),
ApplySignature,
/// Vote for a PoH that is equal to the lastid of this transaction
NewVote(Vote),

3
src/transaction.rs
View File

@@ -127,10 +127,9 @@ impl Transaction {
from_keypair: &Keypair,
contract: Pubkey,
to: Pubkey,
signature: Signature,
last_id: Hash,
) -> Self {
let instruction = Instruction::ApplySignature(signature);
let instruction = Instruction::ApplySignature;
let userdata = serialize(&instruction).unwrap();
Self::new_with_userdata(
from_keypair,