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Omit possible high-sigop txs from block health score

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This commit is contained in:
Mononaut
2023-05-17 11:46:50 -04:00
parent 64d6bda728
commit 81ec54fcb3
10 changed files with 38 additions and 12 deletions
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16
backend/src/api/audit.ts
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@@ -6,14 +6,15 @@ const PROPAGATION_MARGIN = 180; // in seconds, time since a transaction is first
class Audit {
auditBlock(transactions: TransactionExtended[], projectedBlocks: MempoolBlockWithTransactions[], mempool: { [txId: string]: TransactionExtended })
: { censored: string[], added: string[], fresh: string[], score: number, similarity: number } {
: { censored: string[], added: string[], fresh: string[], sigop: string[], score: number, similarity: number } {
if (!projectedBlocks?.[0]?.transactionIds || !mempool) {
return { censored: [], added: [], fresh: [], score: 0, similarity: 1 };
return { censored: [], added: [], fresh: [], sigop: [], score: 0, similarity: 1 };
}
const matches: string[] = []; // present in both mined block and template
const added: string[] = []; // present in mined block, not in template
const fresh: string[] = []; // missing, but firstSeen within PROPAGATION_MARGIN
const sigop: string[] = []; // missing, but possibly has an adjusted vsize due to high sigop count
const isCensored = {}; // missing, without excuse
const isDisplaced = {};
let displacedWeight = 0;
@@ -37,6 +38,8 @@ class Audit {
// tx is recent, may have reached the miner too late for inclusion
if (mempool[txid]?.firstSeen != null && (now - (mempool[txid]?.firstSeen || 0)) <= PROPAGATION_MARGIN) {
fresh.push(txid);
} else if (this.isPossibleHighSigop(mempool[txid])) {
sigop.push(txid);
} else {
isCensored[txid] = true;
}
@@ -137,10 +140,19 @@ class Audit {
censored: Object.keys(isCensored),
added,
fresh,
sigop,
score,
similarity,
};
}
// Detect transactions with a possibly adjusted vsize due to high sigop count
// very rough heuristic based on number of OP_CHECKMULTISIG outputs
// will miss cases with other sources of sigops
isPossibleHighSigop(tx: TransactionExtended): boolean {
const numBareMultisig = tx.vout.reduce((count, vout) => count + (vout.scriptpubkey_asm.includes('OP_CHECKMULTISIG') ? 1 : 0), 0);
return (numBareMultisig * 400) > tx.vsize;
}
}
export default new Audit();