-
Notifications
You must be signed in to change notification settings - Fork 57
/
main.sw
453 lines (399 loc) · 16 KB
/
main.sw
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
contract;
use std::{
auth::{
AuthError,
msg_sender,
},
block::timestamp,
call_frames::msg_asset_id,
constants::BASE_ASSET_ID,
context::msg_amount,
logging::log,
revert::require,
storage::StorageVec,
token::transfer_to_address,
};
abi LimitOrders {
#[storage(read)]
fn get_deposit_by_address(address: Address) -> u64;
#[payable]
#[storage(read, write)]
fn deposit();
#[storage(read, write)]
fn withdraw(amount: u64);
#[storage(read)]
fn orders_amount() -> u64;
#[storage(read)]
fn trades(offset: u64) -> (Option<Trade>, Option<Trade>, Option<Trade>, Option<Trade>, Option<Trade>, Option<Trade>, Option<Trade>, Option<Trade>, Option<Trade>, Option<Trade>);
#[storage(read)]
fn orders(offset: u64) -> (Option<Order>, Option<Order>, Option<Order>, Option<Order>, Option<Order>, Option<Order>, Option<Order>, Option<Order>, Option<Order>, Option<Order>);
#[storage(read)]
fn orders_by_id(ids: [u64; 10]) -> (Option<Order>, Option<Order>, Option<Order>, Option<Order>, Option<Order>, Option<Order>, Option<Order>, Option<Order>, Option<Order>, Option<Order>);
#[storage(read)]
fn order_by_id(id: u64) -> Order;
#[payable]
#[storage(read, write)]
fn create_order(asset1: ContractId, amount1: u64, matcher_fee: u64) -> u64;
#[storage(read, write)]
fn cancel_order(id: u64);
#[payable]
#[storage(read, write)]
fn fulfill_order(id: u64);
#[storage(read, write)]
fn match_orders(order_id_a: u64, order_id_b: u64) ->(Trade, Trade) ;
}
enum Status {
Active: (),
Canceled: (),
Completed: (),
}
pub struct Order {
asset0: ContractId,
amount0: u64,
asset1: ContractId,
amount1: u64,
status: Status,
fulfilled0: u64,
fulfilled1: u64,
owner: Address,
id: u64,
timestamp: u64,
matcher_fee: u64,
matcher_fee_used: u64,
}
struct Trade {
order_id: u64,
asset0: ContractId,
amount0: u64,
asset1: ContractId,
amount1: u64,
timestamp: u64,
}
storage {
orders: StorageMap<u64, Order> = StorageMap {},
orders_amount: u64 = 0,
deposits: StorageMap<Address, u64> = StorageMap {},
trades: StorageVec<Trade> = StorageVec {},
}
fn get_sender_or_throw() -> Address {
match msg_sender().unwrap() {
Identity::Address(addr) => addr,
_ => revert(0),
}
}
fn is_order_active(order: Order) -> bool {
match order.status {
Status::Active => true,
_ => false,
}
}
impl LimitOrders for Contract {
#[storage(read)]
fn get_deposit_by_address(address: Address) -> u64 {
storage.deposits.get(address).unwrap_or(0)
}
#[payable]
#[storage(read, write)]
fn deposit() {
let amount = msg_amount();
let caller = get_sender_or_throw();
require(amount > 0 && msg_asset_id() == BASE_ASSET_ID, "Invalid payment");
let deposit = storage.deposits.get(caller).unwrap_or(0);
storage.deposits.insert(caller, deposit + amount);
}
#[storage(read, write)]
fn withdraw(amount: u64) {
let caller = get_sender_or_throw();
let deposit = storage.deposits.get(caller).unwrap_or(0);
require(amount <= deposit, "Insufficient funds");
storage.deposits.insert(caller, deposit - amount);
transfer_to_address(deposit - amount, BASE_ASSET_ID, caller);
}
#[storage(read)]
fn orders_amount() -> u64 {
storage.orders_amount
}
#[storage(read)]
fn order_by_id(id: u64) -> Order {
let order = storage.orders.get(id);
require(id > 0 && order.is_some(), "Order is not found");
order.unwrap()
}
#[storage(read)]
fn trades(
offset: u64,
) -> (Option<Trade>, Option<Trade>, Option<Trade>, Option<Trade>, Option<Trade>, Option<Trade>, Option<Trade>, Option<Trade>, Option<Trade>, Option<Trade>) {
let mut vec = Vec::new();
let mut i = 0;
while i < 10 {
let trade = if storage.trades.len() - 1 < i + offset {
Option::None
} else {
storage.trades.get(storage.trades.len() - 1 - i - offset)
};
vec.push(trade);
i += 1;
}
(
vec.get(0).unwrap(),
vec.get(1).unwrap(),
vec.get(2).unwrap(),
vec.get(3).unwrap(),
vec.get(4).unwrap(),
vec.get(5).unwrap(),
vec.get(6).unwrap(),
vec.get(7).unwrap(),
vec.get(8).unwrap(),
vec.get(9).unwrap(),
)
}
#[storage(read)]
fn orders(
offset: u64,
) -> (Option<Order>, Option<Order>, Option<Order>, Option<Order>, Option<Order>, Option<Order>, Option<Order>, Option<Order>, Option<Order>, Option<Order>) {
let mut vec = Vec::new();
let mut i = 0;
while i < 10 {
let order = if storage.orders_amount <= i + offset {
Option::None
} else {
storage.orders.get(storage.orders_amount - i - offset)
};
vec.push(order);
i += 1;
}
(
vec.get(0).unwrap(),
vec.get(1).unwrap(),
vec.get(2).unwrap(),
vec.get(3).unwrap(),
vec.get(4).unwrap(),
vec.get(5).unwrap(),
vec.get(6).unwrap(),
vec.get(7).unwrap(),
vec.get(8).unwrap(),
vec.get(9).unwrap(),
)
}
#[storage(read)]
fn orders_by_id(
ids: [u64; 10],
) -> (Option<Order>, Option<Order>, Option<Order>, Option<Order>, Option<Order>, Option<Order>, Option<Order>, Option<Order>, Option<Order>, Option<Order>) {
let mut vec = Vec::new();
let mut i = 0;
while i < 10 {
vec.push(storage.orders.get(ids[i]));
i += 1;
}
(
vec.get(0).unwrap(),
vec.get(1).unwrap(),
vec.get(2).unwrap(),
vec.get(3).unwrap(),
vec.get(4).unwrap(),
vec.get(5).unwrap(),
vec.get(6).unwrap(),
vec.get(7).unwrap(),
vec.get(8).unwrap(),
vec.get(9).unwrap(),
)
}
#[payable]
#[storage(read, write)]
fn create_order(asset1: ContractId, amount1: u64, matcher_fee: u64) -> u64 {
let asset0 = msg_asset_id();
let amount0 = msg_amount();
let caller = get_sender_or_throw();
let deposit = storage.deposits.get(caller).unwrap_or(0);
require(amount0 > 0 && amount1 > 0, "Amount cannot be less then 1");
require(deposit >= matcher_fee, "Not enough deposit");
let id = storage.orders_amount + 1;
let order = Order {
asset0,
amount0,
asset1,
amount1,
fulfilled0: 0,
fulfilled1: 0,
status: Status::Active,
id,
timestamp: timestamp(),
owner: caller,
matcher_fee,
matcher_fee_used: 0,
};
storage.orders_amount = order.id;
storage.orders.insert(order.id, order);
storage.deposits.insert(caller, deposit - matcher_fee);
id
}
#[storage(read, write)]
fn cancel_order(id: u64) {
let order = storage.orders.get(id);
require(id > 0 && order.is_some(), "Order is not found");
let mut order = order.unwrap();
let deposit = storage.deposits.get(order.owner).unwrap_or(0);
require(id > 0 && order.id == id, "Order is not found");
require(get_sender_or_throw() == order.owner, "Access denied");
require(is_order_active(order), "The order isn't active");
order.status = Status::Canceled;
storage.orders.insert(id, order);
storage.deposits.insert(order.owner, deposit + order.matcher_fee - order.matcher_fee_used);
transfer_to_address(order.amount0 - order.fulfilled0, order.asset0, order.owner);
}
#[payable]
#[storage(read, write)]
fn fulfill_order(id: u64) {
let mut order = storage.orders.get(id);
require(id > 0 && order.is_some(), "Order is not found");
let mut order = storage.orders.get(id).unwrap();
let payment_asset = msg_asset_id();
let payment_amount = msg_amount();
require(is_order_active(order), "The order isn't active");
require(payment_amount > 0 && payment_asset == order.asset1, "Invalid payment");
let amount0_left = order.amount0 - order.fulfilled0;
let amount1_left = order.amount1 - order.fulfilled1;
let caller = get_sender_or_throw();
let mut trade = Trade {
order_id: id,
asset0: order.asset0,
amount0: 0,
asset1: order.asset1,
amount1: 0,
timestamp: timestamp(),
};
//If paid more than amount1 - close the order and give cashback
if (payment_amount >= amount1_left) {
// Give the caller asset1 difference like cashback
transfer_to_address(payment_amount - amount1_left, order.asset1, caller);
//The caller will receive asset0 how much is left
transfer_to_address(amount0_left, order.asset0, caller);
// The owner will receive asset1 how much is left
transfer_to_address(amount1_left, order.asset1, order.owner);
order.fulfilled0 += amount0_left;
order.fulfilled1 += amount1_left;
trade.amount0 = amount0_left;
trade.amount1 = amount1_left;
order.status = Status::Completed;
storage.orders.insert(id, order);
let deposit = storage.deposits.get(order.owner).unwrap_or(0);
storage.deposits.insert(order.owner, deposit + order.matcher_fee - order.matcher_fee_used);
}
//If payed less - close order partially
else {
let amount0 = (order.amount0 * (payment_amount / order.amount1));
//The owner will receive payment_amount1
transfer_to_address(payment_amount, order.asset1, order.owner);
//The caller will receive a piece of amount0 floored to integer
transfer_to_address(order.amount0, order.asset0, caller);
order.fulfilled0 += amount0;
order.fulfilled1 += payment_amount;
trade.amount0 = amount0;
trade.amount1 = payment_amount;
storage.orders.insert(id, order);
//FIXME handle matcher fee
}
storage.trades.push(trade);
}
#[storage(read, write)]
//TODO orders_ids_a: u64[], orders_ids_b: u64[]
fn match_orders(order0_id: u64, order1_id: u64) -> (Trade, Trade) {
let matcher = get_sender_or_throw();
let order0 = storage.orders.get(order0_id);
let order1 = storage.orders.get(order1_id);
require(order0_id > 0 && order0.is_some(), "Order 0 is not found");
require(order1_id > 0 && order1.is_some(), "Order 1 is not found");
let mut order0 = storage.orders.get(order0_id).unwrap();
let mut order1 = storage.orders.get(order1_id).unwrap();
require(is_order_active(order0) && is_order_active(order1), "Orders shuold be active");
require(order0.asset0 == order1.asset1 && order0.asset1 == order1.asset0, "Orders don't match by tokens");
let price_0 = order0.amount1 * 10_000_000 / order0.amount0;
let price_1 = order1.amount0 * 10_000_000 / order1.amount1;
require(price_0 <= price_1, "Price of order 1 is too much");
let order0_amount0_left = order0.amount0 - order0.fulfilled0;
let order0_amount1_left = order0.amount1 - order0.fulfilled1;
let order0_matcher_fee_left = order0.matcher_fee - order0.matcher_fee_used;
let order1_amount0_left = order1.amount0 - order1.fulfilled0;
let order1_amount1_left = order1.amount1 - order1.fulfilled1;
let order1_matcher_fee_left = order1.matcher_fee - order1.matcher_fee_used;
let mut trade0 = Trade {
order_id: order0_id,
asset0: order0.asset0,
amount0: 0,
asset1: order0.asset1,
amount1: 0,
timestamp: timestamp(),
};
let mut trade1 = Trade {
order_id: order1_id,
asset0: order1.asset0,
amount0: 0,
asset1: order1.asset1,
amount1: 0,
timestamp: timestamp(),
};
if order0_amount0_left >= order1_amount1_left {
// Transfer order1_amount1 from order0 to order1
order0.fulfilled0 += order1_amount1_left;
order1.fulfilled1 += order1_amount1_left;
trade0.amount0 = order1_amount1_left;
trade1.amount1 = order1_amount1_left;
transfer_to_address(order1_amount1_left, order1.asset1, order1.owner);
order1.status = Status::Completed;
// Transfer order0_fulfill_percent * order0_amount1 / 100 from order1 to order0
let order0_fulfill_percent = order1_amount1_left * 100_000 / order0_amount0_left;
let order0_fulfill_amount = order0_fulfill_percent * order0_amount1_left / 100_000;
order1.fulfilled0 += order0_fulfill_amount;
order0.fulfilled1 += order0_fulfill_amount;
trade1.amount0 = order0_fulfill_amount;
trade0.amount1 = order0_fulfill_amount;
transfer_to_address(order0_fulfill_amount, order0.asset1, order0.owner);
if order0_fulfill_percent == 100_000 {
order0.status = Status::Completed;
}
// Transfer order1_amount0 - order0_fulfill_percent * order0_amount1 / 100 from order1 to order1.owner
let cashback = order1_amount0_left - order0_fulfill_amount;
if cashback > 0 {
order1.fulfilled0 += cashback;
transfer_to_address(cashback, order1.asset0, order1.owner);
}
// Mathcer fee
let order0_matcher_fee = order0_matcher_fee_left * order0_fulfill_percent / 100_000;
order0.matcher_fee_used += order0_matcher_fee;
order1.matcher_fee_used += order1_matcher_fee_left;
transfer_to_address(order0_matcher_fee + order1_matcher_fee_left, BASE_ASSET_ID, matcher);
} else {
// Transfer order0_amount0 from order0 to order1
order0.fulfilled0 += order0_amount0_left;
order1.fulfilled1 += order0_amount0_left;
trade0.amount0 = order0_amount0_left;
trade1.amount1 = order0_amount0_left;
transfer_to_address(order0_amount0_left, order0.asset0, order1.owner);
// Transfer order0_amount1 from order1 to order0
order0.fulfilled1 += order0_amount1_left;
order1.fulfilled0 += order0_amount1_left;
trade0.amount1 = order0_amount1_left;
trade1.amount0 = order0_amount1_left;
transfer_to_address(order0_amount1_left, order0.asset1, order0.owner);
order0.status = Status::Completed;
// Transfer order1_amount0 * order1_fulfill_percent - order0_amount1 (a: 0.01 BTC, b: 0 BTC) from order1 to order1.owner
let order1_fulfill_percent = order0_amount0_left * 100_000 / order1_amount1_left;
if order1_amount0_left * order1_fulfill_percent / 100_000 > order0_amount1_left {
let cashback = order1_amount0_left * order1_fulfill_percent / 100_000 - order0_amount1_left;
order1.fulfilled0 += cashback;
transfer_to_address(cashback, order1.asset0, order1.owner);
}
// Matcher fee
let order0_matcher_fee = order0.matcher_fee - order0.matcher_fee_used;
order0.matcher_fee_used += order0_matcher_fee;
let order1_matcher_fee = order1_matcher_fee_left * order1_fulfill_percent / 100_000;
order1.matcher_fee_used += order1_matcher_fee;
transfer_to_address(order0_matcher_fee + order1_matcher_fee, BASE_ASSET_ID, matcher);
}
storage.trades.push(trade0);
storage.trades.push(trade1);
storage.orders.insert(order0.id, order0);
storage.orders.insert(order1.id, order1);
(trade0, trade1)
}
}