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
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
pub use self::price_conf::PriceConf;
pub use self::error::PythError;
mod entrypoint;
mod error;
mod price_conf;
pub mod processor;
pub mod instruction;
use std::mem::size_of;
use borsh::{BorshSerialize, BorshDeserialize};
use bytemuck::{
cast_slice, from_bytes, try_cast_slice,
Pod, PodCastError, Zeroable,
};
#[cfg(target_arch = "bpf")]
use solana_program::{clock::Clock, sysvar::Sysvar};
solana_program::declare_id!("PythC11111111111111111111111111111111111111");
pub const MAGIC : u32 = 0xa1b2c3d4;
pub const VERSION_2 : u32 = 2;
pub const VERSION : u32 = VERSION_2;
pub const MAP_TABLE_SIZE : usize = 640;
pub const PROD_ACCT_SIZE : usize = 512;
pub const PROD_HDR_SIZE : usize = 48;
pub const PROD_ATTR_SIZE : usize = PROD_ACCT_SIZE - PROD_HDR_SIZE;
pub const MAX_SLOT_DIFFERENCE : u64 = 25;
#[derive(Copy, Clone, Debug, PartialEq, Eq, BorshSerialize, BorshDeserialize, serde::Serialize, serde::Deserialize)]
#[repr(C)]
pub enum AccountType
{
Unknown,
Mapping,
Product,
Price
}
impl Default for AccountType {
fn default() -> Self {
AccountType::Unknown
}
}
#[derive(Copy, Clone, Debug, PartialEq, Eq, BorshSerialize, BorshDeserialize, serde::Serialize, serde::Deserialize)]
#[repr(C)]
pub enum PriceStatus
{
Unknown,
Trading,
Halted,
Auction
}
impl Default for PriceStatus {
fn default() -> Self {
PriceStatus::Unknown
}
}
#[derive(Copy, Clone, Debug, PartialEq, Eq, BorshSerialize, BorshDeserialize, serde::Serialize, serde::Deserialize)]
#[repr(C)]
pub enum CorpAction
{
NoCorpAct
}
impl Default for CorpAction {
fn default() -> Self {
CorpAction::NoCorpAct
}
}
#[derive(Copy, Clone, Debug, PartialEq, Eq, BorshSerialize, BorshDeserialize, serde::Serialize, serde::Deserialize)]
#[repr(C)]
pub enum PriceType
{
Unknown,
Price
}
impl Default for PriceType {
fn default() -> Self {
PriceType::Unknown
}
}
#[derive(Copy, Clone, Debug, Default, PartialEq, Eq, BorshSerialize, BorshDeserialize, serde::Serialize, serde::Deserialize)]
#[repr(C)]
pub struct AccKey
{
pub val: [u8;32]
}
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
#[repr(C)]
pub struct Mapping
{
pub magic : u32,
pub ver : u32,
pub atype : u32,
pub size : u32,
pub num : u32,
pub unused : u32,
pub next : AccKey,
pub products : [AccKey;MAP_TABLE_SIZE]
}
#[cfg(target_endian = "little")]
unsafe impl Zeroable for Mapping {}
#[cfg(target_endian = "little")]
unsafe impl Pod for Mapping {}
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
#[repr(C)]
pub struct Product
{
pub magic : u32,
pub ver : u32,
pub atype : u32,
pub size : u32,
pub px_acc : AccKey,
pub attr : [u8;PROD_ATTR_SIZE]
}
impl Product {
pub fn iter(&self) -> AttributeIter {
AttributeIter { attrs: &self.attr }
}
}
#[cfg(target_endian = "little")]
unsafe impl Zeroable for Product {}
#[cfg(target_endian = "little")]
unsafe impl Pod for Product {}
#[derive(Copy, Clone, Debug, Default, PartialEq, Eq, BorshSerialize, BorshDeserialize, serde::Serialize, serde::Deserialize)]
#[repr(C)]
pub struct PriceInfo
{
pub price : i64,
pub conf : u64,
pub status : PriceStatus,
pub corp_act : CorpAction,
pub pub_slot : u64
}
#[derive(Copy, Clone, Debug, Default, PartialEq, Eq, BorshSerialize, BorshDeserialize, serde::Serialize, serde::Deserialize)]
#[repr(C)]
pub struct PriceComp
{
pub publisher : AccKey,
pub agg : PriceInfo,
pub latest : PriceInfo
}
#[derive(Copy, Clone, Debug, Default, PartialEq, Eq, BorshSerialize, BorshDeserialize, serde::Serialize, serde::Deserialize)]
#[repr(C)]
pub struct Ema
{
pub val : i64,
pub numer : i64,
pub denom : i64
}
#[derive(Copy, Clone, Debug, Default, PartialEq, Eq)]
#[repr(C)]
pub struct Price
{
pub magic : u32,
pub ver : u32,
pub atype : u32,
pub size : u32,
pub ptype : PriceType,
pub expo : i32,
pub num : u32,
pub num_qt : u32,
pub last_slot : u64,
pub valid_slot : u64,
pub twap : Ema,
pub twac : Ema,
pub drv1 : i64,
pub drv2 : i64,
pub prod : AccKey,
pub next : AccKey,
pub prev_slot : u64,
pub prev_price : i64,
pub prev_conf : u64,
pub drv3 : i64,
pub agg : PriceInfo,
pub comp : [PriceComp;32]
}
#[cfg(target_endian = "little")]
unsafe impl Zeroable for Price {}
#[cfg(target_endian = "little")]
unsafe impl Pod for Price {}
impl Price {
pub fn get_current_price_status(&self) -> PriceStatus {
#[cfg(target_arch = "bpf")]
if matches!(self.agg.status, PriceStatus::Trading) &&
Clock::get().unwrap().slot - self.agg.pub_slot > MAX_SLOT_DIFFERENCE {
return PriceStatus::Unknown;
}
self.agg.status
}
pub fn get_current_price(&self) -> Option<PriceConf> {
if !matches!(self.get_current_price_status(), PriceStatus::Trading) {
None
} else {
Some(PriceConf {
price: self.agg.price,
conf: self.agg.conf,
expo: self.expo
})
}
}
pub fn get_twap(&self) -> Option<PriceConf> {
Some(PriceConf { price: self.twap.val, conf: self.twac.val as u64, expo: self.expo })
}
pub fn get_price_in_quote(&self, quote: &Price, result_expo: i32) -> Option<PriceConf> {
return match (self.get_current_price(), quote.get_current_price()) {
(Some(base_price_conf), Some(quote_price_conf)) =>
base_price_conf.div("e_price_conf)?.scale_to_exponent(result_expo),
(_, _) => None,
}
}
pub fn price_basket(amounts: &[(Price, i64, i32)], result_expo: i32) -> Option<PriceConf> {
assert!(amounts.len() > 0);
let mut res = PriceConf { price: 0, conf: 0, expo: result_expo };
for i in 0..amounts.len() {
res = res.add(
&amounts[i].0.get_current_price()?.cmul(amounts[i].1, amounts[i].2)?.scale_to_exponent(result_expo)?
)?
}
Some(res)
}
}
#[derive(Copy, Clone, Debug, Default, PartialEq, Eq, serde::Serialize, serde::Deserialize)]
struct AccKeyU64
{
pub val: [u64;4]
}
#[cfg(target_endian = "little")]
unsafe impl Zeroable for AccKeyU64 {}
#[cfg(target_endian = "little")]
unsafe impl Pod for AccKeyU64 {}
impl AccKey
{
pub fn is_valid( &self ) -> bool {
match load::<AccKeyU64>( &self.val ) {
Ok(k8) => k8.val[0]!=0 || k8.val[1]!=0 || k8.val[2]!=0 || k8.val[3]!=0,
Err(_) => false,
}
}
}
fn load<T: Pod>(data: &[u8]) -> Result<&T, PodCastError> {
let size = size_of::<T>();
if data.len() >= size {
Ok(from_bytes(cast_slice::<u8, u8>(try_cast_slice(
&data[0..size],
)?)))
} else {
Err(PodCastError::SizeMismatch)
}
}
pub fn load_mapping(data: &[u8]) -> Result<&Mapping, PythError> {
let pyth_mapping = load::<Mapping>(&data).map_err(|_| PythError::InvalidAccountData)?;
if pyth_mapping.magic != MAGIC {
return Err(PythError::InvalidAccountData);
}
if pyth_mapping.ver != VERSION_2 {
return Err(PythError::BadVersionNumber);
}
if pyth_mapping.atype != AccountType::Mapping as u32 {
return Err(PythError::WrongAccountType);
}
return Ok(pyth_mapping);
}
pub fn load_product(data: &[u8]) -> Result<&Product, PythError> {
let pyth_product = load::<Product>(&data).map_err(|_| PythError::InvalidAccountData)?;
if pyth_product.magic != MAGIC {
return Err(PythError::InvalidAccountData);
}
if pyth_product.ver != VERSION_2 {
return Err(PythError::BadVersionNumber);
}
if pyth_product.atype != AccountType::Product as u32 {
return Err(PythError::WrongAccountType);
}
return Ok(pyth_product);
}
pub fn load_price(data: &[u8]) -> Result<&Price, PythError> {
let pyth_price = load::<Price>(&data).map_err(|_| PythError::InvalidAccountData)?;
if pyth_price.magic != MAGIC {
return Err(PythError::InvalidAccountData);
}
if pyth_price.ver != VERSION_2 {
return Err(PythError::BadVersionNumber);
}
if pyth_price.atype != AccountType::Price as u32 {
return Err(PythError::WrongAccountType);
}
return Ok(pyth_price);
}
pub struct AttributeIter<'a> {
attrs: &'a [u8],
}
impl<'a> Iterator for AttributeIter<'a> {
type Item = (&'a str, &'a str);
fn next(&mut self) -> Option<Self::Item> {
if self.attrs.is_empty() {
return None;
}
let (key, data) = get_attr_str(self.attrs);
let (val, data) = get_attr_str(data);
self.attrs = data;
return Some((key, val));
}
}
fn get_attr_str(buf: &[u8]) -> (&str, &[u8]) {
if buf.is_empty() {
return ("", &[]);
}
let len = buf[0] as usize;
let str = std::str::from_utf8(&buf[1..len + 1]).expect("attr should be ascii or utf-8");
let remaining_buf = &buf[len + 1..];
(str, remaining_buf)
}