solana_exchange_program/
exchange_processor.rs

1//! Config processor
2
3use {
4    crate::{exchange_instruction::*, exchange_state::*, faucet},
5    log::*,
6    num_derive::{FromPrimitive, ToPrimitive},
7    serde_derive::Serialize,
8    solana_metrics::inc_new_counter_info,
9    solana_sdk::{
10        account::{ReadableAccount, WritableAccount},
11        decode_error::DecodeError,
12        instruction::InstructionError,
13        keyed_account::KeyedAccount,
14        process_instruction::InvokeContext,
15        program_utils::limited_deserialize,
16        pubkey::Pubkey,
17    },
18    std::cmp,
19    thiserror::Error,
20};
21
22#[derive(Error, Debug, Serialize, Clone, PartialEq, FromPrimitive, ToPrimitive)]
23pub enum ExchangeError {
24    #[error("Signer does not own account")]
25    SignerDoesNotOwnAccount,
26    #[error("Signer does not own order")]
27    SignerDoesNotOwnOrder,
28    #[error("The From account balance is too low")]
29    FromAccountBalanceTooLow,
30    #[error("Attmept operation on mismatched tokens")]
31    TokenMismatch,
32    #[error("From trade balance is too low")]
33    FromTradeBalanceTooLow,
34    #[error("Serialization failed")]
35    SerializeFailed,
36}
37impl<T> DecodeError<T> for ExchangeError {
38    fn type_of() -> &'static str {
39        "ExchangeError"
40    }
41}
42
43pub struct ExchangeProcessor {}
44
45impl ExchangeProcessor {
46    #[allow(clippy::needless_pass_by_value)]
47    fn map_to_invalid_arg(err: std::boxed::Box<bincode::ErrorKind>) -> InstructionError {
48        warn!("Deserialize failed, not a valid state: {:?}", err);
49        InstructionError::InvalidArgument
50    }
51
52    fn is_account_unallocated(data: &[u8]) -> Result<(), InstructionError> {
53        let state: ExchangeState = bincode::deserialize(data).map_err(Self::map_to_invalid_arg)?;
54        if let ExchangeState::Unallocated = state {
55            Ok(())
56        } else {
57            error!("New account is already in use");
58            Err(InstructionError::InvalidAccountData)
59        }
60    }
61
62    fn deserialize_account(data: &[u8]) -> Result<TokenAccountInfo, InstructionError> {
63        let state: ExchangeState = bincode::deserialize(data).map_err(Self::map_to_invalid_arg)?;
64        if let ExchangeState::Account(account) = state {
65            Ok(account)
66        } else {
67            error!("Not a valid account");
68            Err(InstructionError::InvalidAccountData)
69        }
70    }
71
72    fn deserialize_order(data: &[u8]) -> Result<OrderInfo, InstructionError> {
73        let state: ExchangeState = bincode::deserialize(data).map_err(Self::map_to_invalid_arg)?;
74        if let ExchangeState::Trade(info) = state {
75            Ok(info)
76        } else {
77            error!("Not a valid trade");
78            Err(InstructionError::InvalidAccountData)
79        }
80    }
81
82    fn serialize(state: &ExchangeState, data: &mut [u8]) -> Result<(), InstructionError> {
83        let writer = std::io::BufWriter::new(data);
84        match bincode::serialize_into(writer, state) {
85            Ok(_) => Ok(()),
86            Err(e) => {
87                error!("Serialize failed: {:?}", e);
88                Err(ExchangeError::SerializeFailed.into())
89            }
90        }
91    }
92
93    fn trade_to_token_account(trade: &OrderInfo) -> TokenAccountInfo {
94        // Turn trade order into token account
95
96        let token = match trade.side {
97            OrderSide::Ask => trade.pair.Quote,
98            OrderSide::Bid => trade.pair.Base,
99        };
100
101        let mut account = TokenAccountInfo::default().owner(&trade.owner);
102        account.tokens[token] = trade.tokens_settled;
103        account
104    }
105
106    fn calculate_swap(
107        scaler: u64,
108        to_trade: &mut OrderInfo,
109        from_trade: &mut OrderInfo,
110        profit_account: &mut TokenAccountInfo,
111    ) -> Result<(), InstructionError> {
112        if to_trade.tokens == 0 || from_trade.tokens == 0 {
113            error!("Inactive Trade, balance is zero");
114            return Err(InstructionError::InvalidArgument);
115        }
116        if to_trade.price == 0 || from_trade.price == 0 {
117            error!("Inactive Trade, price is zero");
118            return Err(InstructionError::InvalidArgument);
119        }
120
121        // Calc swap
122
123        trace!("tt {} ft {}", to_trade.tokens, from_trade.tokens);
124        trace!("tp {} fp {}", to_trade.price, from_trade.price);
125
126        let max_to_secondary = to_trade.tokens * to_trade.price / scaler;
127        let max_to_primary = from_trade.tokens * scaler / from_trade.price;
128
129        trace!("mtp {} mts {}", max_to_primary, max_to_secondary);
130
131        let max_primary = cmp::min(max_to_primary, to_trade.tokens);
132        let max_secondary = cmp::min(max_to_secondary, from_trade.tokens);
133
134        trace!("mp {} ms {}", max_primary, max_secondary);
135
136        let primary_tokens = if max_secondary < max_primary {
137            max_secondary * scaler / from_trade.price
138        } else {
139            max_primary
140        };
141        let secondary_tokens = if max_secondary < max_primary {
142            max_secondary
143        } else {
144            max_primary * to_trade.price / scaler
145        };
146
147        if primary_tokens == 0 || secondary_tokens == 0 {
148            error!("Trade quantities to low to be fulfilled");
149            return Err(InstructionError::InvalidArgument);
150        }
151
152        trace!("pt {} st {}", primary_tokens, secondary_tokens);
153
154        let primary_cost = cmp::max(primary_tokens, secondary_tokens * scaler / to_trade.price);
155        let secondary_cost = cmp::max(secondary_tokens, primary_tokens * from_trade.price / scaler);
156
157        trace!("pc {} sc {}", primary_cost, secondary_cost);
158
159        let primary_profit = primary_cost - primary_tokens;
160        let secondary_profit = secondary_cost - secondary_tokens;
161
162        trace!("pp {} sp {}", primary_profit, secondary_profit);
163
164        let primary_token = to_trade.pair.Base;
165        let secondary_token = from_trade.pair.Quote;
166
167        // Update tokens
168
169        if to_trade.tokens < primary_cost {
170            error!("Not enough tokens in to account");
171            return Err(InstructionError::InvalidArgument);
172        }
173        if from_trade.tokens < secondary_cost {
174            error!("Not enough tokens in from account");
175            return Err(InstructionError::InvalidArgument);
176        }
177        to_trade.tokens -= primary_cost;
178        to_trade.tokens_settled += secondary_tokens;
179        from_trade.tokens -= secondary_cost;
180        from_trade.tokens_settled += primary_tokens;
181
182        profit_account.tokens[primary_token] += primary_profit;
183        profit_account.tokens[secondary_token] += secondary_profit;
184
185        Ok(())
186    }
187
188    fn do_account_request(keyed_accounts: &[KeyedAccount]) -> Result<(), InstructionError> {
189        const OWNER_INDEX: usize = 0;
190        const NEW_ACCOUNT_INDEX: usize = 1;
191
192        if keyed_accounts.len() < 2 {
193            error!("Not enough accounts");
194            return Err(InstructionError::InvalidArgument);
195        }
196        Self::is_account_unallocated(keyed_accounts[NEW_ACCOUNT_INDEX].try_account_ref()?.data())?;
197        Self::serialize(
198            &ExchangeState::Account(
199                TokenAccountInfo::default()
200                    .owner(keyed_accounts[OWNER_INDEX].unsigned_key())
201                    .tokens(100_000, 100_000, 100_000, 100_000),
202            ),
203            &mut keyed_accounts[NEW_ACCOUNT_INDEX]
204                .try_account_ref_mut()?
205                .data_as_mut_slice(),
206        )
207    }
208
209    fn do_transfer_request(
210        keyed_accounts: &[KeyedAccount],
211        token: Token,
212        tokens: u64,
213    ) -> Result<(), InstructionError> {
214        const OWNER_INDEX: usize = 0;
215        const TO_ACCOUNT_INDEX: usize = 1;
216        const FROM_ACCOUNT_INDEX: usize = 2;
217
218        if keyed_accounts.len() < 3 {
219            error!("Not enough accounts");
220            return Err(InstructionError::InvalidArgument);
221        }
222
223        let mut to_account =
224            Self::deserialize_account(keyed_accounts[TO_ACCOUNT_INDEX].try_account_ref()?.data())?;
225
226        if &faucet::id() == keyed_accounts[FROM_ACCOUNT_INDEX].unsigned_key() {
227            to_account.tokens[token] += tokens;
228        } else {
229            let state: ExchangeState =
230                bincode::deserialize(keyed_accounts[FROM_ACCOUNT_INDEX].try_account_ref()?.data())
231                    .map_err(Self::map_to_invalid_arg)?;
232            match state {
233                ExchangeState::Account(mut from_account) => {
234                    if &from_account.owner != keyed_accounts[OWNER_INDEX].unsigned_key() {
235                        error!("Signer does not own from account");
236                        return Err(ExchangeError::SignerDoesNotOwnAccount.into());
237                    }
238
239                    if from_account.tokens[token] < tokens {
240                        error!("From account balance too low");
241                        return Err(ExchangeError::FromAccountBalanceTooLow.into());
242                    }
243
244                    from_account.tokens[token] -= tokens;
245                    to_account.tokens[token] += tokens;
246
247                    Self::serialize(
248                        &ExchangeState::Account(from_account),
249                        &mut keyed_accounts[FROM_ACCOUNT_INDEX]
250                            .try_account_ref_mut()?
251                            .data_as_mut_slice(),
252                    )?;
253                }
254                ExchangeState::Trade(mut from_trade) => {
255                    if &from_trade.owner != keyed_accounts[OWNER_INDEX].unsigned_key() {
256                        error!("Signer does not own from account");
257                        return Err(ExchangeError::SignerDoesNotOwnAccount.into());
258                    }
259
260                    let from_token = match from_trade.side {
261                        OrderSide::Ask => from_trade.pair.Quote,
262                        OrderSide::Bid => from_trade.pair.Base,
263                    };
264                    if token != from_token {
265                        error!("Trade to transfer from does not hold correct token");
266                        return Err(ExchangeError::TokenMismatch.into());
267                    }
268
269                    if from_trade.tokens_settled < tokens {
270                        error!("From trade balance too low");
271                        return Err(ExchangeError::FromTradeBalanceTooLow.into());
272                    }
273
274                    from_trade.tokens_settled -= tokens;
275                    to_account.tokens[token] += tokens;
276
277                    Self::serialize(
278                        &ExchangeState::Trade(from_trade),
279                        &mut keyed_accounts[FROM_ACCOUNT_INDEX]
280                            .try_account_ref_mut()?
281                            .data_as_mut_slice(),
282                    )?;
283                }
284                _ => {
285                    error!("Not a valid from account for transfer");
286                    return Err(InstructionError::InvalidArgument);
287                }
288            }
289        }
290
291        Self::serialize(
292            &ExchangeState::Account(to_account),
293            &mut keyed_accounts[TO_ACCOUNT_INDEX]
294                .try_account_ref_mut()?
295                .data_as_mut_slice(),
296        )
297    }
298
299    fn do_order_request(
300        keyed_accounts: &[KeyedAccount],
301        info: &OrderRequestInfo,
302    ) -> Result<(), InstructionError> {
303        const OWNER_INDEX: usize = 0;
304        const ORDER_INDEX: usize = 1;
305        const ACCOUNT_INDEX: usize = 2;
306
307        if keyed_accounts.len() < 3 {
308            error!("Not enough accounts");
309            return Err(InstructionError::InvalidArgument);
310        }
311
312        Self::is_account_unallocated(keyed_accounts[ORDER_INDEX].try_account_ref()?.data())?;
313
314        let mut account =
315            Self::deserialize_account(keyed_accounts[ACCOUNT_INDEX].try_account_ref_mut()?.data())?;
316
317        if &account.owner != keyed_accounts[OWNER_INDEX].unsigned_key() {
318            error!("Signer does not own account");
319            return Err(ExchangeError::SignerDoesNotOwnAccount.into());
320        }
321        let from_token = match info.side {
322            OrderSide::Ask => info.pair.Base,
323            OrderSide::Bid => info.pair.Quote,
324        };
325        if account.tokens[from_token] < info.tokens {
326            error!("From token balance is too low");
327            return Err(ExchangeError::FromAccountBalanceTooLow.into());
328        }
329
330        if let Err(e) = check_trade(info.side, info.tokens, info.price) {
331            bincode::serialize(&e).unwrap();
332        }
333
334        // Trade holds the tokens in escrow
335        account.tokens[from_token] -= info.tokens;
336
337        inc_new_counter_info!("exchange_processor-trades", 1);
338
339        Self::serialize(
340            &ExchangeState::Trade(OrderInfo {
341                owner: *keyed_accounts[OWNER_INDEX].unsigned_key(),
342                side: info.side,
343                pair: info.pair,
344                tokens: info.tokens,
345                price: info.price,
346                tokens_settled: 0,
347            }),
348            &mut keyed_accounts[ORDER_INDEX]
349                .try_account_ref_mut()?
350                .data_as_mut_slice(),
351        )?;
352        Self::serialize(
353            &ExchangeState::Account(account),
354            &mut keyed_accounts[ACCOUNT_INDEX]
355                .try_account_ref_mut()?
356                .data_as_mut_slice(),
357        )
358    }
359
360    fn do_order_cancellation(keyed_accounts: &[KeyedAccount]) -> Result<(), InstructionError> {
361        const OWNER_INDEX: usize = 0;
362        const ORDER_INDEX: usize = 1;
363
364        if keyed_accounts.len() < 2 {
365            error!("Not enough accounts");
366            return Err(InstructionError::InvalidArgument);
367        }
368
369        let order = Self::deserialize_order(keyed_accounts[ORDER_INDEX].try_account_ref()?.data())?;
370
371        if &order.owner != keyed_accounts[OWNER_INDEX].unsigned_key() {
372            error!("Signer does not own order");
373            return Err(ExchangeError::SignerDoesNotOwnOrder.into());
374        }
375
376        let token = match order.side {
377            OrderSide::Ask => order.pair.Base,
378            OrderSide::Bid => order.pair.Quote,
379        };
380
381        let mut account = TokenAccountInfo::default().owner(&order.owner);
382        account.tokens[token] = order.tokens;
383        account.tokens[token] += order.tokens_settled;
384
385        // Turn trade order into a token account
386        Self::serialize(
387            &ExchangeState::Account(account),
388            &mut keyed_accounts[ORDER_INDEX]
389                .try_account_ref_mut()?
390                .data_as_mut_slice(),
391        )
392    }
393
394    fn do_swap_request(keyed_accounts: &[KeyedAccount]) -> Result<(), InstructionError> {
395        const TO_ORDER_INDEX: usize = 1;
396        const FROM_ORDER_INDEX: usize = 2;
397        const PROFIT_ACCOUNT_INDEX: usize = 3;
398
399        if keyed_accounts.len() < 4 {
400            error!("Not enough accounts");
401            return Err(InstructionError::InvalidArgument);
402        }
403
404        let mut to_order =
405            Self::deserialize_order(keyed_accounts[TO_ORDER_INDEX].try_account_ref()?.data())?;
406        let mut from_order =
407            Self::deserialize_order(keyed_accounts[FROM_ORDER_INDEX].try_account_ref()?.data())?;
408        let mut profit_account = Self::deserialize_account(
409            keyed_accounts[PROFIT_ACCOUNT_INDEX]
410                .try_account_ref()?
411                .data(),
412        )?;
413
414        if to_order.side != OrderSide::Ask {
415            error!("To trade is not a To");
416            return Err(InstructionError::InvalidArgument);
417        }
418        if from_order.side != OrderSide::Bid {
419            error!("From trade is not a From");
420            return Err(InstructionError::InvalidArgument);
421        }
422        if to_order.pair != from_order.pair {
423            error!("Mismatched token pairs");
424            return Err(InstructionError::InvalidArgument);
425        }
426        if to_order.side == from_order.side {
427            error!("Matching trade sides");
428            return Err(InstructionError::InvalidArgument);
429        }
430
431        if let Err(e) =
432            Self::calculate_swap(SCALER, &mut to_order, &mut from_order, &mut profit_account)
433        {
434            error!(
435                "Swap calculation failed from {} for {} to {} for {}",
436                from_order.tokens, from_order.price, to_order.tokens, to_order.price,
437            );
438            return Err(e);
439        }
440
441        inc_new_counter_info!("exchange_processor-swaps", 1);
442
443        if to_order.tokens == 0 {
444            // Turn into token account
445            Self::serialize(
446                &ExchangeState::Account(Self::trade_to_token_account(&from_order)),
447                &mut keyed_accounts[TO_ORDER_INDEX]
448                    .try_account_ref_mut()?
449                    .data_as_mut_slice(),
450            )?;
451        } else {
452            Self::serialize(
453                &ExchangeState::Trade(to_order),
454                &mut keyed_accounts[TO_ORDER_INDEX]
455                    .try_account_ref_mut()?
456                    .data_as_mut_slice(),
457            )?;
458        }
459
460        if from_order.tokens == 0 {
461            // Turn into token account
462            Self::serialize(
463                &ExchangeState::Account(Self::trade_to_token_account(&from_order)),
464                &mut keyed_accounts[FROM_ORDER_INDEX]
465                    .try_account_ref_mut()?
466                    .data_as_mut_slice(),
467            )?;
468        } else {
469            Self::serialize(
470                &ExchangeState::Trade(from_order),
471                &mut keyed_accounts[FROM_ORDER_INDEX]
472                    .try_account_ref_mut()?
473                    .data_as_mut_slice(),
474            )?;
475        }
476
477        Self::serialize(
478            &ExchangeState::Account(profit_account),
479            &mut keyed_accounts[PROFIT_ACCOUNT_INDEX]
480                .try_account_ref_mut()?
481                .data_as_mut_slice(),
482        )
483    }
484}
485
486pub fn process_instruction(
487    _program_id: &Pubkey,
488    data: &[u8],
489    invoke_context: &mut dyn InvokeContext,
490) -> Result<(), InstructionError> {
491    let keyed_accounts = invoke_context.get_keyed_accounts()?;
492
493    solana_logger::setup();
494    match limited_deserialize::<ExchangeInstruction>(data)? {
495        ExchangeInstruction::AccountRequest => {
496            ExchangeProcessor::do_account_request(keyed_accounts)
497        }
498        ExchangeInstruction::TransferRequest(token, tokens) => {
499            ExchangeProcessor::do_transfer_request(keyed_accounts, token, tokens)
500        }
501        ExchangeInstruction::OrderRequest(info) => {
502            ExchangeProcessor::do_order_request(keyed_accounts, &info)
503        }
504        ExchangeInstruction::OrderCancellation => {
505            ExchangeProcessor::do_order_cancellation(keyed_accounts)
506        }
507        ExchangeInstruction::SwapRequest => ExchangeProcessor::do_swap_request(keyed_accounts),
508    }
509}
510
511#[cfg(test)]
512mod test {
513    use {
514        super::*,
515        crate::{exchange_instruction, id},
516        solana_runtime::{bank::Bank, bank_client::BankClient},
517        solana_sdk::{
518            client::SyncClient,
519            genesis_config::create_genesis_config,
520            message::Message,
521            signature::{Keypair, Signer},
522            system_instruction,
523        },
524        std::mem,
525    };
526
527    #[allow(clippy::too_many_arguments)]
528    fn try_calc(
529        scaler: u64,
530        primary_tokens: u64,
531        primary_price: u64,
532        secondary_tokens: u64,
533        secondary_price: u64,
534        primary_tokens_expect: u64,
535        secondary_tokens_expect: u64,
536        primary_tokens_settled_expect: u64,
537        secondary_tokens_settled_expect: u64,
538        profit_account_tokens: Tokens,
539    ) -> Result<(), InstructionError> {
540        trace!(
541            "Swap {} for {} to {} for {}",
542            primary_tokens,
543            primary_price,
544            secondary_tokens,
545            secondary_price,
546        );
547        let mut to_trade = OrderInfo::default();
548        let mut from_trade = OrderInfo::default().side(OrderSide::Bid);
549        let mut profit_account = TokenAccountInfo::default();
550
551        to_trade.tokens = primary_tokens;
552        to_trade.price = primary_price;
553        from_trade.tokens = secondary_tokens;
554        from_trade.price = secondary_price;
555        ExchangeProcessor::calculate_swap(
556            scaler,
557            &mut to_trade,
558            &mut from_trade,
559            &mut profit_account,
560        )?;
561
562        trace!(
563            "{:?} {:?} {:?} {:?}\n{:?}\n{:?}\n{:?}\n{:?}",
564            to_trade.tokens,
565            primary_tokens_expect,
566            from_trade.tokens,
567            secondary_tokens_expect,
568            primary_tokens_settled_expect,
569            secondary_tokens_settled_expect,
570            profit_account.tokens,
571            profit_account_tokens
572        );
573
574        assert_eq!(to_trade.tokens, primary_tokens_expect);
575        assert_eq!(from_trade.tokens, secondary_tokens_expect);
576        assert_eq!(to_trade.tokens_settled, primary_tokens_settled_expect);
577        assert_eq!(from_trade.tokens_settled, secondary_tokens_settled_expect);
578        assert_eq!(profit_account.tokens, profit_account_tokens);
579        Ok(())
580    }
581
582    #[test]
583    #[rustfmt::skip]
584    fn test_calculate_swap() {
585        solana_logger::setup();
586
587        try_calc(1,     50,     2,   50,    1,  0, 0, 50,   50, Tokens::new(   0, 0, 0, 0)).unwrap_err();
588        try_calc(1,     50,     1,    0,    1,  0, 0, 50,   50, Tokens::new(   0, 0, 0, 0)).unwrap_err();
589        try_calc(1,      0,     1,   50,    1,  0, 0, 50,   50, Tokens::new(   0, 0, 0, 0)).unwrap_err();
590        try_calc(1,     50,     1,   50,    0,  0, 0, 50,   50, Tokens::new(   0, 0, 0, 0)).unwrap_err();
591        try_calc(1,     50,     0,   50,    1,  0, 0, 50,   50, Tokens::new(   0, 0, 0, 0)).unwrap_err();
592        try_calc(1,       1,    2,    2,    3,  1, 2,  0,    0, Tokens::new(   0, 0, 0, 0)).unwrap_err();
593
594        try_calc(1,     50,     1,   50,    1,  0, 0, 50,   50, Tokens::new(   0, 0, 0, 0)).unwrap();
595        try_calc(1,       1,    2,    3,    3,  0, 0,  2,    1, Tokens::new(   0, 1, 0, 0)).unwrap();
596        try_calc(1,       2,    2,    3,    3,  1, 0,  2,    1, Tokens::new(   0, 1, 0, 0)).unwrap();
597        try_calc(1,       3,    2,    3,    3,  2, 0,  2,    1, Tokens::new(   0, 1, 0, 0)).unwrap();
598        try_calc(1,       3,    2,    6,    3,  1, 0,  4,    2, Tokens::new(   0, 2, 0, 0)).unwrap();
599        try_calc(1000,    1, 2000,    3, 3000,  0, 0,  2,    1, Tokens::new(   0, 1, 0, 0)).unwrap();
600        try_calc(1,       3,    2,    7,    3,  1, 1,  4,    2, Tokens::new(   0, 2, 0, 0)).unwrap();
601        try_calc(1000, 3000,  333, 1000,  500,  0, 1,999, 1998, Tokens::new(1002, 0, 0, 0)).unwrap();
602        try_calc(1000,   50,  100,   50,  101,  0,45,  5,   49, Tokens::new(   1, 0, 0, 0)).unwrap();
603    }
604
605    fn create_bank(lamports: u64) -> (Bank, Keypair) {
606        let (genesis_config, mint_keypair) = create_genesis_config(lamports);
607        let mut bank = Bank::new(&genesis_config);
608        bank.add_builtin("exchange_program", id(), process_instruction);
609        (bank, mint_keypair)
610    }
611
612    fn create_client(bank: Bank, mint_keypair: Keypair) -> (BankClient, Keypair) {
613        let owner = Keypair::new();
614        let bank_client = BankClient::new(bank);
615        bank_client
616            .transfer_and_confirm(42, &mint_keypair, &owner.pubkey())
617            .unwrap();
618
619        (bank_client, owner)
620    }
621
622    fn create_account(client: &BankClient, owner: &Keypair) -> Pubkey {
623        let new = Keypair::new();
624
625        let instruction = system_instruction::create_account(
626            &owner.pubkey(),
627            &new.pubkey(),
628            1,
629            mem::size_of::<ExchangeState>() as u64,
630            &id(),
631        );
632
633        client
634            .send_and_confirm_message(
635                &[owner, &new],
636                Message::new(&[instruction], Some(&owner.pubkey())),
637            )
638            .unwrap_or_else(|_| panic!("{}:{}", line!(), file!()));
639        new.pubkey()
640    }
641
642    fn create_token_account(client: &BankClient, owner: &Keypair) -> Pubkey {
643        let new = create_account(client, owner);
644        let instruction = exchange_instruction::account_request(&owner.pubkey(), &new);
645        client
646            .send_and_confirm_instruction(owner, instruction)
647            .unwrap_or_else(|_| panic!("{}:{}", line!(), file!()));
648        new
649    }
650
651    fn transfer(client: &BankClient, owner: &Keypair, to: &Pubkey, token: Token, tokens: u64) {
652        let instruction = exchange_instruction::transfer_request(
653            &owner.pubkey(),
654            to,
655            &faucet::id(),
656            token,
657            tokens,
658        );
659        client
660            .send_and_confirm_instruction(owner, instruction)
661            .unwrap_or_else(|_| panic!("{}:{}", line!(), file!()));
662    }
663
664    fn trade(
665        client: &BankClient,
666        owner: &Keypair,
667        side: OrderSide,
668        pair: AssetPair,
669        from_token: Token,
670        src_tokens: u64,
671        trade_tokens: u64,
672        price: u64,
673    ) -> (Pubkey, Pubkey) {
674        let trade = create_account(client, owner);
675        let src = create_token_account(client, owner);
676        transfer(client, owner, &src, from_token, src_tokens);
677
678        let instruction = exchange_instruction::trade_request(
679            &owner.pubkey(),
680            &trade,
681            side,
682            pair,
683            trade_tokens,
684            price,
685            &src,
686        );
687        client
688            .send_and_confirm_instruction(owner, instruction)
689            .unwrap_or_else(|_| panic!("{}:{}", line!(), file!()));
690        (trade, src)
691    }
692
693    #[test]
694    fn test_exchange_new_account() {
695        solana_logger::setup();
696        let (bank, mint_keypair) = create_bank(10_000);
697        let (client, owner) = create_client(bank, mint_keypair);
698
699        let new = create_token_account(&client, &owner);
700        let new_account_data = client.get_account_data(&new).unwrap().unwrap();
701
702        // Check results
703
704        assert_eq!(
705            TokenAccountInfo::default()
706                .owner(&owner.pubkey())
707                .tokens(100_000, 100_000, 100_000, 100_000),
708            ExchangeProcessor::deserialize_account(&new_account_data).unwrap()
709        );
710    }
711
712    #[test]
713    fn test_exchange_new_account_not_unallocated() {
714        solana_logger::setup();
715        let (bank, mint_keypair) = create_bank(10_000);
716        let (client, owner) = create_client(bank, mint_keypair);
717
718        let new = create_token_account(&client, &owner);
719        let instruction = exchange_instruction::account_request(&owner.pubkey(), &new);
720        client
721            .send_and_confirm_instruction(&owner, instruction)
722            .expect_err(&format!("{}:{}", line!(), file!()));
723    }
724
725    #[test]
726    fn test_exchange_new_transfer_request() {
727        solana_logger::setup();
728        let (bank, mint_keypair) = create_bank(10_000);
729        let (client, owner) = create_client(bank, mint_keypair);
730
731        let new = create_token_account(&client, &owner);
732
733        let instruction = exchange_instruction::transfer_request(
734            &owner.pubkey(),
735            &new,
736            &faucet::id(),
737            Token::A,
738            42,
739        );
740        client
741            .send_and_confirm_instruction(&owner, instruction)
742            .unwrap_or_else(|_| panic!("{}:{}", line!(), file!()));
743
744        let new_account_data = client.get_account_data(&new).unwrap().unwrap();
745
746        // Check results
747
748        assert_eq!(
749            TokenAccountInfo::default()
750                .owner(&owner.pubkey())
751                .tokens(100_042, 100_000, 100_000, 100_000),
752            ExchangeProcessor::deserialize_account(&new_account_data).unwrap()
753        );
754    }
755
756    #[test]
757    fn test_exchange_new_trade_request() {
758        solana_logger::setup();
759        let (bank, mint_keypair) = create_bank(10_000);
760        let (client, owner) = create_client(bank, mint_keypair);
761
762        let (trade, src) = trade(
763            &client,
764            &owner,
765            OrderSide::Ask,
766            AssetPair::default(),
767            Token::A,
768            42,
769            2,
770            1000,
771        );
772
773        let trade_account_data = client.get_account_data(&trade).unwrap().unwrap();
774        let src_account_data = client.get_account_data(&src).unwrap().unwrap();
775
776        // check results
777
778        assert_eq!(
779            OrderInfo {
780                owner: owner.pubkey(),
781                side: OrderSide::Ask,
782                pair: AssetPair::default(),
783                tokens: 2,
784                price: 1000,
785                tokens_settled: 0
786            },
787            ExchangeProcessor::deserialize_order(&trade_account_data).unwrap()
788        );
789        assert_eq!(
790            TokenAccountInfo::default()
791                .owner(&owner.pubkey())
792                .tokens(100_040, 100_000, 100_000, 100_000),
793            ExchangeProcessor::deserialize_account(&src_account_data).unwrap()
794        );
795    }
796
797    #[test]
798    fn test_exchange_new_swap_request() {
799        solana_logger::setup();
800        let (bank, mint_keypair) = create_bank(10_000);
801        let (client, owner) = create_client(bank, mint_keypair);
802
803        let profit = create_token_account(&client, &owner);
804        let (to_trade, _) = trade(
805            &client,
806            &owner,
807            OrderSide::Ask,
808            AssetPair::default(),
809            Token::A,
810            2,
811            2,
812            2000,
813        );
814        let (from_trade, _) = trade(
815            &client,
816            &owner,
817            OrderSide::Bid,
818            AssetPair::default(),
819            Token::B,
820            3,
821            3,
822            3000,
823        );
824
825        let instruction =
826            exchange_instruction::swap_request(&owner.pubkey(), &to_trade, &from_trade, &profit);
827        client
828            .send_and_confirm_instruction(&owner, instruction)
829            .unwrap_or_else(|_| panic!("{}:{}", line!(), file!()));
830
831        let to_trade_account_data = client.get_account_data(&to_trade).unwrap().unwrap();
832        let from_trade_account_data = client.get_account_data(&from_trade).unwrap().unwrap();
833        let profit_account_data = client.get_account_data(&profit).unwrap().unwrap();
834
835        // check results
836
837        assert_eq!(
838            OrderInfo {
839                owner: owner.pubkey(),
840                side: OrderSide::Ask,
841                pair: AssetPair::default(),
842                tokens: 1,
843                price: 2000,
844                tokens_settled: 2,
845            },
846            ExchangeProcessor::deserialize_order(&to_trade_account_data).unwrap()
847        );
848
849        assert_eq!(
850            TokenAccountInfo::default()
851                .owner(&owner.pubkey())
852                .tokens(1, 0, 0, 0),
853            ExchangeProcessor::deserialize_account(&from_trade_account_data).unwrap()
854        );
855
856        assert_eq!(
857            TokenAccountInfo::default()
858                .owner(&owner.pubkey())
859                .tokens(100_000, 100_001, 100_000, 100_000),
860            ExchangeProcessor::deserialize_account(&profit_account_data).unwrap()
861        );
862    }
863
864    #[test]
865    fn test_exchange_trade_to_token_account() {
866        solana_logger::setup();
867        let (bank, mint_keypair) = create_bank(10_000);
868        let (client, owner) = create_client(bank, mint_keypair);
869
870        let profit = create_token_account(&client, &owner);
871        let (to_trade, _) = trade(
872            &client,
873            &owner,
874            OrderSide::Ask,
875            AssetPair::default(),
876            Token::A,
877            3,
878            3,
879            2000,
880        );
881        let (from_trade, _) = trade(
882            &client,
883            &owner,
884            OrderSide::Bid,
885            AssetPair::default(),
886            Token::B,
887            3,
888            3,
889            3000,
890        );
891
892        let instruction =
893            exchange_instruction::swap_request(&owner.pubkey(), &to_trade, &from_trade, &profit);
894        client
895            .send_and_confirm_instruction(&owner, instruction)
896            .unwrap_or_else(|_| panic!("{}:{}", line!(), file!()));
897
898        let new = create_token_account(&client, &owner);
899
900        let instruction =
901            exchange_instruction::transfer_request(&owner.pubkey(), &new, &to_trade, Token::B, 1);
902        client
903            .send_and_confirm_instruction(&owner, instruction)
904            .unwrap_or_else(|_| panic!("{}:{}", line!(), file!()));
905
906        let instruction =
907            exchange_instruction::transfer_request(&owner.pubkey(), &new, &from_trade, Token::A, 1);
908        client
909            .send_and_confirm_instruction(&owner, instruction)
910            .unwrap_or_else(|_| panic!("{}:{}", line!(), file!()));
911
912        let new_account_data = client.get_account_data(&new).unwrap().unwrap();
913
914        // Check results
915
916        assert_eq!(
917            TokenAccountInfo::default()
918                .owner(&owner.pubkey())
919                .tokens(100_001, 100_001, 100_000, 100_000),
920            ExchangeProcessor::deserialize_account(&new_account_data).unwrap()
921        );
922    }
923}
solana_exchange_program/exchange_processor.rs

solana_exchange_program/
exchange_processor.rs
