machankura/mempool
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safer mempool cloning for different GBT algorithms

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Mononaut 2023-02-10 07:26:49 -06:00
parent 241850beca
commit 8f3b8276c5
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2 changed files with 16 additions and 1 deletions
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3
backend/src/api/websocket-handler.ts
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@ -19,6 +19,7 @@ import feeApi from './fee-api';
import BlocksAuditsRepository from '../repositories/BlocksAuditsRepository'; import BlocksAuditsRepository from '../repositories/BlocksAuditsRepository';
import BlocksSummariesRepository from '../repositories/BlocksSummariesRepository'; import BlocksSummariesRepository from '../repositories/BlocksSummariesRepository';
import Audit from './audit'; import Audit from './audit';
import { deepClone } from '../utils/clone';
class WebsocketHandler { class WebsocketHandler {
private wss: WebSocket.Server | undefined; private wss: WebSocket.Server | undefined;
@ -421,7 +422,7 @@ class WebsocketHandler {
let projectedBlocks; let projectedBlocks;
// template calculation functions have mempool side effects, so calculate audits using // template calculation functions have mempool side effects, so calculate audits using
// a cloned copy of the mempool if we're running a different algorithm for mempool updates // a cloned copy of the mempool if we're running a different algorithm for mempool updates
const auditMempool = (config.MEMPOOL.ADVANCED_GBT_AUDIT === config.MEMPOOL.ADVANCED_GBT_MEMPOOL) ? _memPool : JSON.parse(JSON.stringify(_memPool)); const auditMempool = (config.MEMPOOL.ADVANCED_GBT_AUDIT === config.MEMPOOL.ADVANCED_GBT_MEMPOOL) ? _memPool : deepClone(_memPool);
if (config.MEMPOOL.ADVANCED_GBT_AUDIT) { if (config.MEMPOOL.ADVANCED_GBT_AUDIT) {
projectedBlocks = await mempoolBlocks.makeBlockTemplates(auditMempool, false); projectedBlocks = await mempoolBlocks.makeBlockTemplates(auditMempool, false);
} else { } else {

14
backend/src/utils/clone.ts Normal file
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@ -0,0 +1,14 @@
// simple recursive deep clone for literal-type objects
// does not preserve Dates, Maps, Sets etc
// does not support recursive objects
// properties deeper than maxDepth will be shallow cloned
export function deepClone(obj: any, maxDepth: number = 50, depth: number = 0): any {
let cloned = obj;
if (depth < maxDepth && typeof obj === 'object') {
cloned = Array.isArray(obj) ? [] : {};
for (const key in obj) {
cloned[key] = deepClone(obj[key], maxDepth, depth + 1);
}
}
return cloned;
}