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Implement v1 block audits

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This commit is contained in:
Mononaut
2024-07-20 11:55:11 +00:00
parent 96e2e6060b
commit 7cc01af631
10 changed files with 134 additions and 83 deletions
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38
backend/src/api/audit.ts
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@@ -6,15 +6,16 @@ import rbfCache from './rbf-cache';
const PROPAGATION_MARGIN = 180; // in seconds, time since a transaction is first seen after which it is assumed to have propagated to all miners
class Audit {
auditBlock(transactions: MempoolTransactionExtended[], projectedBlocks: MempoolBlockWithTransactions[], mempool: { [txId: string]: MempoolTransactionExtended }, useAccelerations: boolean = false)
: { censored: string[], added: string[], prioritized: string[], fresh: string[], sigop: string[], fullrbf: string[], accelerated: string[], score: number, similarity: number } {
auditBlock(height: number, transactions: MempoolTransactionExtended[], projectedBlocks: MempoolBlockWithTransactions[], mempool: { [txId: string]: MempoolTransactionExtended })
: { unseen: string[], censored: string[], added: string[], prioritized: string[], fresh: string[], sigop: string[], fullrbf: string[], accelerated: string[], score: number, similarity: number } {
if (!projectedBlocks?.[0]?.transactionIds || !mempool) {
return { censored: [], added: [], prioritized: [], fresh: [], sigop: [], fullrbf: [], accelerated: [], score: 1, similarity: 1 };
return { unseen: [], censored: [], added: [], prioritized: [], fresh: [], sigop: [], fullrbf: [], accelerated: [], score: 1, similarity: 1 };
}
const matches: string[] = []; // present in both mined block and template
const added: string[] = []; // present in mined block, not in template
const prioritized: string[] = [] // present in the mined block, not in the template, but further down in the mempool
const unseen: string[] = []; // present in the mined block, not in our mempool
const prioritized: string[] = []; // higher in the block than would be expected by in-band feerate alone
const fresh: string[] = []; // missing, but firstSeen or lastBoosted within PROPAGATION_MARGIN
const rbf: string[] = []; // either missing or present, and either part of a full-rbf replacement, or a conflict with the mined block
const accelerated: string[] = []; // prioritized by the mempool accelerator
@@ -113,11 +114,16 @@ class Audit {
} else {
if (rbfCache.has(tx.txid)) {
rbf.push(tx.txid);
} else if (!isDisplaced[tx.txid]) {
if (!mempool[tx.txid] && !rbfCache.getReplacedBy(tx.txid)) {
unseen.push(tx.txid);
}
} else {
if (mempool[tx.txid]) {
prioritized.push(tx.txid);
if (isDisplaced[tx.txid]) {
added.push(tx.txid);
}
} else {
added.push(tx.txid);
unseen.push(tx.txid);
}
}
overflowWeight += tx.weight;
@@ -125,6 +131,23 @@ class Audit {
totalWeight += tx.weight;
}
// identify "prioritized" transactions
let lastEffectiveRate = 0;
// Iterate over the mined template from bottom to top (excluding the coinbase)
// Transactions should appear in ascending order of mining priority.
for (let i = transactions.length - 1; i > 0; i--) {
const blockTx = transactions[i];
// If a tx has a lower in-band effective fee rate than the previous tx,
// it must have been prioritized out-of-band (in order to have a higher mining priority)
// so exclude from the analysis.
if ((blockTx.effectiveFeePerVsize || 0) < lastEffectiveRate) {
prioritized.push(blockTx.txid);
} else {
lastEffectiveRate = blockTx.effectiveFeePerVsize || 0;
}
}
// transactions missing from near the end of our template are probably not being censored
let overflowWeightRemaining = overflowWeight - (config.MEMPOOL.BLOCK_WEIGHT_UNITS - totalWeight);
let maxOverflowRate = 0;
@@ -165,6 +188,7 @@ class Audit {
const similarity = projectedWeight ? matchedWeight / projectedWeight : 1;
return {
unseen,
censored: Object.keys(isCensored),
added,
prioritized,