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Implement rust gbt updateBlockTemplates

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Mononaut 2023-06-23 18:37:03 -04:00
parent 52bb8b4a4d
commit 1d51b01bd1
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7 changed files with 179 additions and 30 deletions
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47
backend/rust-gbt/Cargo.lock generated
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@ -2,6 +2,18 @@
# It is not intended for manual editing.
version = 3
[[package]]
name = "autocfg"
version = "1.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
[[package]]
name = "bytes"
version = "1.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "89b2fd2a0dcf38d7971e2194b6b6eebab45ae01067456a7fd93d5547a61b70be"
[[package]]
name = "cfg-if"
version = "1.0.0"
@ -12,7 +24,26 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
name = "gbt"
version = "0.1.0"
dependencies = [
"bytes",
"neon",
"once_cell",
"priority-queue",
]
[[package]]
name = "hashbrown"
version = "0.12.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
[[package]]
name = "indexmap"
version = "1.9.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "bd070e393353796e801d209ad339e89596eb4c8d430d18ede6a1cced8fafbd99"
dependencies = [
"autocfg",
"hashbrown",
]
[[package]]
@ -66,6 +97,22 @@ dependencies = [
"smallvec",
]
[[package]]
name = "once_cell"
version = "1.18.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "dd8b5dd2ae5ed71462c540258bedcb51965123ad7e7ccf4b9a8cafaa4a63576d"
[[package]]
name = "priority-queue"
version = "1.3.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "fff39edfcaec0d64e8d0da38564fad195d2d51b680940295fcc307366e101e61"
dependencies = [
"autocfg",
"indexmap",
]
[[package]]
name = "proc-macro2"
version = "1.0.60"

1
backend/rust-gbt/Cargo.toml
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@ -14,6 +14,7 @@ crate-type = ["cdylib"]
[dependencies]
priority-queue = "1.3.2"
bytes = "1.4.0"
once_cell = "1.18.0"
[dependencies.neon]
version = "0.10"

12
backend/rust-gbt/src/gbt.rs
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@ -34,13 +34,7 @@ impl Ord for TxPriority {
}
}
pub fn gbt(mempool_array: Vec<ThreadTransaction>) -> (Vec<Vec<u32>>, Vec<(u32, f64)>, Vec<Vec<u32>>) {
let mut mempool: HashMap<u32,ThreadTransaction> = HashMap::new();
for transaction in mempool_array {
mempool.insert(transaction.uid, transaction);
}
pub fn gbt(mempool: &mut HashMap<u32,ThreadTransaction>) -> (Vec<Vec<u32>>, Vec<(u32, f64)>, Vec<Vec<u32>>) {
return make_block_templates(mempool);
}
@ -49,13 +43,13 @@ pub fn gbt(mempool_array: Vec<ThreadTransaction>) -> (Vec<Vec<u32>>, Vec<(u32, f
* (see BlockAssembler in https://github.com/bitcoin/bitcoin/blob/master/src/node/miner.cpp)
* Ported from https://github.com/mempool/mempool/blob/master/backend/src/api/tx-selection-worker.ts
*/
fn make_block_templates(mempool: HashMap<u32,ThreadTransaction>) -> (Vec<Vec<u32>>, Vec<(u32, f64)>, Vec<Vec<u32>>) {
fn make_block_templates(mempool: &mut HashMap<u32,ThreadTransaction>) -> (Vec<Vec<u32>>, Vec<(u32, f64)>, Vec<Vec<u32>>) {
let mut audit_pool: HashMap<u32, AuditTransaction> = HashMap::new();
let mut mempool_array: VecDeque<u32> = VecDeque::new();
let mut cluster_array: Vec<Vec<u32>> = Vec::new();
// Initialize working structs
for (uid, tx) in &mempool {
for (uid, tx) in mempool {
let audit_tx = AuditTransaction {
uid: tx.uid,
fee: tx.fee,

60
backend/rust-gbt/src/lib.rs
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@ -1,11 +1,20 @@
use neon::{prelude::*, types::buffer::TypedArray};
use std::collections::HashMap;
use std::ops::DerefMut;
use std::sync::Mutex;
use once_cell::sync::Lazy;
mod gbt;
mod thread_transaction;
mod audit_transaction;
use thread_transaction::{ThreadTransaction};
mod utils;
use thread_transaction::ThreadTransaction;
fn go(mut cx: FunctionContext) -> JsResult<JsUndefined> {
static THREAD_TRANSACTIONS: Lazy<Mutex<HashMap<u32, ThreadTransaction>>> = Lazy::new(|| {
Mutex::new(HashMap::new())
});
fn make(mut cx: FunctionContext) -> JsResult<JsUndefined> {
let mempool_arg = cx.argument::<JsArrayBuffer>(0)?.root(&mut cx).into_inner(&mut cx);
let callback = cx.argument::<JsFunction>(1)?.root(&mut cx);
let channel = cx.channel();
@ -13,8 +22,48 @@ fn go(mut cx: FunctionContext) -> JsResult<JsUndefined> {
let buffer = mempool_arg.as_slice(&mut cx);
let thread_transactions = ThreadTransaction::batch_from_buffer(buffer);
let mut map = THREAD_TRANSACTIONS.lock().unwrap();
map.clear();
for tx in thread_transactions {
map.insert(tx.uid, tx);
}
drop(map);
run_in_thread(channel, callback);
Ok(cx.undefined())
}
fn update(mut cx: FunctionContext) -> JsResult<JsUndefined> {
let new_txs_arg = cx.argument::<JsArrayBuffer>(0)?.root(&mut cx).into_inner(&mut cx);
let remove_txs_arg = cx.argument::<JsArrayBuffer>(1)?.root(&mut cx).into_inner(&mut cx);
let callback = cx.argument::<JsFunction>(2)?.root(&mut cx);
let channel = cx.channel();
let mut map = THREAD_TRANSACTIONS.lock().unwrap();
let new_tx_buffer = new_txs_arg.as_slice(&mut cx);
let thread_transactions = ThreadTransaction::batch_from_buffer(new_tx_buffer);
for tx in thread_transactions {
map.insert(tx.uid, tx);
}
let remove_tx_buffer = remove_txs_arg.as_slice(&mut cx);
let remove_ids = utils::txids_from_buffer(remove_tx_buffer);
for txid in &remove_ids {
map.remove(txid);
}
drop(map);
run_in_thread(channel, callback);
Ok(cx.undefined())
}
fn run_in_thread(channel: Channel, callback: Root<JsFunction>) {
std::thread::spawn(move || {
let (blocks, rates, clusters) = gbt::gbt(thread_transactions);
let mut map = THREAD_TRANSACTIONS.lock().unwrap();
let (blocks, rates, clusters) = gbt::gbt(map.deref_mut());
drop(map);
channel.send(move |mut cx| {
let result = JsObject::new(&mut cx);
@ -64,12 +113,11 @@ fn go(mut cx: FunctionContext) -> JsResult<JsUndefined> {
Ok(())
});
});
Ok(cx.undefined())
}
#[neon::main]
fn main(mut cx: ModuleContext) -> NeonResult<()> {
cx.export_function("go", go)?;
cx.export_function("make", make)?;
cx.export_function("update", update)?;
Ok(())
}

1
backend/rust-gbt/src/thread_transaction.rs
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@ -2,6 +2,7 @@
extern crate bytes;
use std::io::Cursor;
use bytes::buf::Buf;
pub struct ThreadTransaction {
pub uid: u32,
pub fee: u64,

14
backend/rust-gbt/src/utils.rs Normal file
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@ -0,0 +1,14 @@
extern crate bytes;
use std::io::Cursor;
use bytes::buf::Buf;
pub fn txids_from_buffer(buffer: &[u8]) -> Vec<u32> {
let mut txids: Vec<u32> = Vec::new();
let mut cursor = Cursor::new(buffer);
let size = cursor.get_u32();
for _ in 0..size {
txids.push(cursor.get_u32());
}
return txids;
}

74
backend/src/api/mempool-blocks.ts
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@ -11,6 +11,7 @@ class MempoolBlocks {
private mempoolBlocks: MempoolBlockWithTransactions[] = [];
private mempoolBlockDeltas: MempoolBlockDelta[] = [];
private txSelectionWorker: Worker | null = null;
private rustInitialized: boolean = false;
private nextUid: number = 1;
private uidMap: Map<number, string> = new Map(); // map short numerical uids to full txids
@ -284,7 +285,7 @@ class MempoolBlocks {
const start = Date.now();
for (const tx of Object.values(added)) {
this.setUid(tx);
this.setUid(tx, true);
}
const removedUids = removed.map(tx => this.getUid(tx)).filter(uid => uid != null) as number[];
// prepare a stripped down version of the mempool with only the minimum necessary data
@ -337,23 +338,49 @@ class MempoolBlocks {
// serialize relevant mempool data into an ArrayBuffer
// to reduce the overhead of passing this data to the rust thread
const mempoolBuffer = this.mempoolToArrayBuffer(newMempool);
const mempoolBuffer = this.mempoolToArrayBuffer(Object.values(newMempool), newMempool);
// run the block construction algorithm in a separate thread, and wait for a result
try {
const { blocks, rates, clusters } = this.convertNeonResultTxids(await new Promise((resolve) => { neonAddon.go(mempoolBuffer, resolve); }));
const { blocks, rates, clusters } = this.convertNeonResultTxids(await new Promise((resolve) => { neonAddon.make(mempoolBuffer, resolve); }));
this.rustInitialized = true;
const processed = this.processBlockTemplates(newMempool, blocks, rates, clusters, saveResults);
logger.debug(`RUST makeBlockTemplates completed in ${(Date.now() - start)/1000} seconds`);
return processed;
} catch (e) {
this.rustInitialized = false;
logger.err('RUST makeBlockTemplates failed. ' + (e instanceof Error ? e.message : e));
}
return this.mempoolBlocks;
}
public async $rustUpdateBlockTemplates(newMempool: { [txid: string]: MempoolTransactionExtended }, added: MempoolTransactionExtended[], removed: MempoolTransactionExtended[], saveResults: boolean = false): Promise<void> {
await this.$rustMakeBlockTemplates(newMempool, saveResults);
return;
if (!this.rustInitialized) {
// need to reset the worker
await this.$rustMakeBlockTemplates(newMempool, saveResults);
return;
}
const start = Date.now();
for (const tx of Object.values(added)) {
this.setUid(tx, true);
}
const removedUids = removed.map(tx => this.getUid(tx)).filter(uid => uid != null) as number[];
// serialize relevant mempool data into an ArrayBuffer
// to reduce the overhead of passing this data to the rust thread
const addedBuffer = this.mempoolToArrayBuffer(added, newMempool);
const removedBuffer = this.uidsToArrayBuffer(removedUids);
// run the block construction algorithm in a separate thread, and wait for a result
try {
const { blocks, rates, clusters } = this.convertNeonResultTxids(await new Promise((resolve) => { neonAddon.update(addedBuffer, removedBuffer, resolve); }));
this.processBlockTemplates(newMempool, blocks, rates, clusters, saveResults);
logger.debug(`RUST updateBlockTemplates completed in ${(Date.now() - start)/1000} seconds`);
} catch (e) {
this.rustInitialized = false;
logger.err('RUST updateBlockTemplates failed. ' + (e instanceof Error ? e.message : e));
}
}
private processBlockTemplates(mempool, blocks: string[][], rates: { [root: string]: number }, clusters: { [root: string]: string[] }, saveResults): MempoolBlockWithTransactions[] {
@ -487,12 +514,16 @@ class MempoolBlocks {
this.nextUid = 1;
}
private setUid(tx: MempoolTransactionExtended): number {
const uid = this.nextUid;
this.nextUid++;
this.uidMap.set(uid, tx.txid);
tx.uid = uid;
return uid;
private setUid(tx: MempoolTransactionExtended, skipSet = false): number {
if (tx.uid == null || !skipSet) {
const uid = this.nextUid;
this.nextUid++;
this.uidMap.set(uid, tx.txid);
tx.uid = uid;
return uid;
} else {
return tx.uid;
}
}
private getUid(tx: MempoolTransactionExtended): number | void {
@ -565,14 +596,14 @@ class MempoolBlocks {
return { blocks: convertedBlocks, rates: convertedRates, clusters: convertedClusters } as { blocks: string[][], rates: { [root: string]: number }, clusters: { [root: string]: string[] }};
}
private mempoolToArrayBuffer(mempool: { [txid: string]: MempoolTransactionExtended }): ArrayBuffer {
private mempoolToArrayBuffer(txs: MempoolTransactionExtended[], mempool: { [txid: string]: MempoolTransactionExtended }): ArrayBuffer {
let len = 4;
const inputs: { [uid: number]: number[] } = {};
let validCount = 0;
for (const tx of Object.values(mempool)) {
for (const tx of txs) {
if (tx.uid != null) {
validCount++;
const txInputs = tx.vin.map(v => this.getUid(mempool[v.txid])).filter(uid => uid != null) as number[]
const txInputs = tx.vin.map(v => this.getUid(mempool[v.txid])).filter(uid => uid != null) as number[];
inputs[tx.uid] = txInputs;
len += (10 + txInputs.length) * 4;
}
@ -581,7 +612,7 @@ class MempoolBlocks {
const view = new DataView(buf);
view.setUint32(0, validCount, false);
let offset = 4;
for (const tx of Object.values(mempool)) {
for (const tx of txs) {
if (tx.uid != null) {
view.setUint32(offset, tx.uid, false);
view.setFloat64(offset + 4, tx.fee, false);
@ -599,6 +630,19 @@ class MempoolBlocks {
}
return buf;
}
private uidsToArrayBuffer(uids: number[]): ArrayBuffer {
let len = (uids.length + 1) * 4;
const buf = new ArrayBuffer(len);
const view = new DataView(buf);
view.setUint32(0, uids.length, false);
let offset = 4;
for (const uid of uids) {
view.setUint32(offset, uid, false);
offset += 4;
}
return buf;
}
}
export default new MempoolBlocks();