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Refactor forensics batching, speed up opened channel forensics

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Mononaut 2023-08-18 00:19:02 +09:00
parent 5bee54a2bf
commit 995acb238d
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1 changed files with 56 additions and 46 deletions
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102
backend/src/tasks/lightning/forensics.service.ts
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@ -71,18 +71,18 @@ class ForensicsService {
try {
logger.debug(`Started running closed channel forensics...`);
let remainingChannels;
let allChannels;
if (onlyNewChannels) {
remainingChannels = await channelsApi.$getClosedChannelsWithoutReason();
allChannels = await channelsApi.$getClosedChannelsWithoutReason();
} else {
remainingChannels = await channelsApi.$getUnresolvedClosedChannels();
allChannels = await channelsApi.$getUnresolvedClosedChannels();
}
let progress = 0;
const sliceLength = 1000;
// process batches of 1000 channels
for (let i = 0; i < Math.ceil(remainingChannels.length / sliceLength); i++) {
const channels = remainingChannels.slice(i * sliceLength, (i + 1) * sliceLength);
for (let i = 0; i < Math.ceil(allChannels.length / sliceLength); i++) {
const channels = allChannels.slice(i * sliceLength, (i + 1) * sliceLength);
let allOutspends: IEsploraApi.Outspend[][] = [];
const forceClosedChannels: { channel: any, cachedSpends: string[] }[] = [];
@ -91,31 +91,28 @@ class ForensicsService {
try {
const outspendTxids = channels.map(channel => channel.closing_transaction_id);
allOutspends = await bitcoinApi.$getBatchedOutspendsInternal(outspendTxids);
logger.info(`Fetched outspends for ${allOutspends.length} txs from esplora for lightning forensics`);
logger.info(`Fetched outspends for ${allOutspends.length} txs from esplora for LN forensics`);
await Common.sleep$(config.LIGHTNING.FORENSICS_RATE_LIMIT);
} catch (e) {
logger.err(`Failed to call ${config.ESPLORA.REST_API_URL + '/txs/outspends'}. Reason ${e instanceof Error ? e.message : e}`);
}
// fetch spending transactions in bulk and load into txCache
try {
const newSpendingTxids: { [txid: string]: boolean } = {};
for (const outspends of allOutspends) {
for (const outspend of outspends) {
if (outspend.spent && outspend.txid) {
if (!this.txCache[outspend.txid]) {
newSpendingTxids[outspend.txid] = true;
}
}
const newSpendingTxids: { [txid: string]: boolean } = {};
for (const outspends of allOutspends) {
for (const outspend of outspends) {
if (outspend.spent && outspend.txid) {
newSpendingTxids[outspend.txid] = true;
}
}
const allOutspendTxs = await bitcoinApi.$getRawTransactions(Object.keys(newSpendingTxids));
logger.info(`Fetched ${allOutspendTxs.length} out-spending txs from esplora for lightning forensics`);
for (const tx of allOutspendTxs) {
this.txCache[tx.txid] = tx;
}
} catch (e) {
logger.err(`Failed to call ${config.ESPLORA.REST_API_URL + '/txs'}. Reason ${e instanceof Error ? e.message : e}`);
}
const allOutspendTxs = await this.fetchTransactions(
allOutspends.flatMap(outspends =>
outspends
.filter(outspend => outspend.spent && outspend.txid)
.map(outspend => outspend.txid)
)
);
logger.info(`Fetched ${allOutspendTxs.length} out-spending txs from esplora for LN forensics`);
// process each outspend
for (const [index, channel] of channels.entries()) {
@ -163,21 +160,8 @@ class ForensicsService {
}
// fetch force-closing transactions in bulk
try {
const newClosingTxids: { [txid: string]: boolean } = {};
for (const { channel } of forceClosedChannels) {
if (!this.txCache[channel.closing_transaction_id]) {
newClosingTxids[channel.closing_transaction_id] = true;
}
}
const closingTxs = await bitcoinApi.$getRawTransactions(Object.keys(newClosingTxids));
logger.info(`Fetched ${closingTxs.length} closing txs from esplora for lightning forensics`);
for (const tx of closingTxs) {
this.txCache[tx.txid] = tx;
}
} catch (e) {
logger.err(`Failed to call ${config.ESPLORA.REST_API_URL + '/txs'}. Reason ${e instanceof Error ? e.message : e}`);
}
const closingTxs = await this.fetchTransactions(forceClosedChannels.map(x => x.channel.closing_transaction_id));
logger.info(`Fetched ${closingTxs.length} closing txs from esplora for LN forensics`);
// process channels with no lightning script reasons
for (const { channel, cachedSpends } of forceClosedChannels) {
@ -211,7 +195,7 @@ class ForensicsService {
progress += channels.length;
const elapsedSeconds = Math.round((new Date().getTime() / 1000) - this.loggerTimer);
if (elapsedSeconds > 10) {
logger.debug(`Updating channel closed channel forensics ${progress}/${remainingChannels.length}`);
logger.debug(`Updating channel closed channel forensics ${progress}/${allChannels.length}`);
this.loggerTimer = new Date().getTime() / 1000;
}
}
@ -279,8 +263,11 @@ class ForensicsService {
logger.debug(`Started running open channel forensics...`);
const channels = await channelsApi.$getChannelsWithoutSourceChecked();
// preload open channel transactions
await this.fetchTransactions(channels.map(channel => channel.transaction_id), true);
for (const openChannel of channels) {
const openTx = await this.fetchTransaction(openChannel.transaction_id, true);
const openTx = this.txCache[openChannel.transaction_id];
if (!openTx) {
continue;
}
@ -414,17 +401,17 @@ class ForensicsService {
};
});
}
// preload outspend transactions
await this.fetchTransactions(outspends.filter(o => o.spent && o.txid).map(o => o.txid), true);
for (let i = 0; i < outspends?.length; i++) {
const outspend = outspends[i];
const output = prevChannel.outputs[i];
if (outspend.spent && outspend.txid) {
try {
const spendingTx = await this.fetchTransaction(outspend.txid, true);
if (spendingTx) {
output.type = this.findLightningScript(spendingTx.vin[outspend.vin || 0]);
}
} catch (e) {
logger.err(`Failed to call ${config.ESPLORA.REST_API_URL + '/tx/' + outspend.txid}. Reason ${e instanceof Error ? e.message : e}`);
const spendingTx = this.txCache[outspend.txid];
if (spendingTx) {
output.type = this.findLightningScript(spendingTx.vin[outspend.vin || 0]);
}
} else {
output.type = 0;
@ -496,6 +483,29 @@ class ForensicsService {
return tx;
}
// fetches a batch of transactions and adds them to the txCache
// the returned list of txs does *not* preserve ordering or number
async fetchTransactions(txids, temp: boolean = false): Promise<(IEsploraApi.Transaction | null)[]> {
// deduplicate txids
const uniqueTxids = [...new Set<string>(txids)];
// filter out any transactions we already have in the cache
const needToFetch: string[] = uniqueTxids.filter(txid => !this.txCache[txid]);
try {
const txs = await bitcoinApi.$getRawTransactions(needToFetch);
for (const tx of txs) {
this.txCache[tx.txid] = tx;
if (temp) {
this.tempCached.push(tx.txid);
}
}
await Common.sleep$(config.LIGHTNING.FORENSICS_RATE_LIMIT);
} catch (e) {
logger.err(`Failed to call ${config.ESPLORA.REST_API_URL + '/txs'}. Reason ${e instanceof Error ? e.message : e}`);
return [];
}
return txids.map(txid => this.txCache[txid]);
}
clearTempCache(): void {
for (const txid of this.tempCached) {
delete this.txCache[txid];