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LogTape","\u002Fcompare\u002Flogtape","9.compare\u002F3.logtape",{"title":605,"path":606,"stem":607,"icon":577},"evlog vs Winston: formats and request events","\u002Fcompare\u002Fwinston","9.compare\u002F4.winston",{"title":609,"path":610,"stem":611,"icon":577},"evlog vs Consola: reporters and request context","\u002Fcompare\u002Fconsola","9.compare\u002F5.consola",{"id":613,"title":411,"body":614,"description":1154,"extension":1155,"links":1156,"meta":1161,"navigation":1162,"path":412,"seo":1163,"stem":413,"__hash__":1164},"docs\u002F5.use-cases\u002F4.audit\u002F05.compliance.md",{"type":615,"value":616,"toc":1147},"minimark",[617,630,635,638,751,774,783,787,794,905,949,953,956,969,982,986,989,1048,1051,1055,1143],[618,619,620,621,625,626,629],"p",{},"Compliance frameworks (SOC2, HIPAA, GDPR, PCI) ask the same five questions of every audit log: ",[622,623,624],"strong",{},"who, what, when, from where, with which outcome",", plus ",[622,627,628],{},"how do we know it wasn't tampered with",". evlog answers each one through composition of the existing primitives.",[631,632,634],"h2",{"id":633},"integrity","Integrity",[618,636,637],{},"Hash-chain the audit log so any tampering is detectable. Each event's hash includes the previous hash, so deleting a row breaks the chain forward of that point.",[639,640,645],"pre",{"className":641,"code":642,"language":643,"meta":644,"style":644},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","auditOnly(\n  signed(createFsDrain({ dir: '.audit' }), { strategy: 'hash-chain' }),\n  { await: true },\n)\n","typescript","",[646,647,648,661,727,745],"code",{"__ignoreMap":644},[649,650,653,657],"span",{"class":651,"line":652},"line",1,[649,654,656],{"class":655},"s2Zo4","auditOnly",[649,658,660],{"class":659},"sTEyZ","(\n",[649,662,664,667,670,673,675,679,683,686,689,693,696,699,702,705,708,711,713,715,718,720,722,724],{"class":651,"line":663},2,[649,665,666],{"class":655},"  signed",[649,668,669],{"class":659},"(",[649,671,672],{"class":655},"createFsDrain",[649,674,669],{"class":659},[649,676,678],{"class":677},"sMK4o","{",[649,680,682],{"class":681},"swJcz"," dir",[649,684,685],{"class":677},":",[649,687,688],{"class":677}," '",[649,690,692],{"class":691},"sfazB",".audit",[649,694,695],{"class":677},"'",[649,697,698],{"class":677}," }",[649,700,701],{"class":659},")",[649,703,704],{"class":677},",",[649,706,707],{"class":677}," {",[649,709,710],{"class":681}," strategy",[649,712,685],{"class":677},[649,714,688],{"class":677},[649,716,717],{"class":691},"hash-chain",[649,719,695],{"class":677},[649,721,698],{"class":677},[649,723,701],{"class":659},[649,725,726],{"class":677},",\n",[649,728,730,733,736,738,742],{"class":651,"line":729},3,[649,731,732],{"class":677},"  {",[649,734,735],{"class":681}," await",[649,737,685],{"class":677},[649,739,741],{"class":740},"sfNiH"," true",[649,743,744],{"class":677}," },\n",[649,746,748],{"class":651,"line":747},4,[649,749,750],{"class":659},")\n",[752,753,754,761,762,765,766,769,770,773],"warning",{},[622,755,756,757,760],{},"Rotate ",[646,758,759],{},"secret"," for HMAC-signed audits annually."," When you rotate, embed a key id alongside the signature (e.g. extend ",[646,763,764],{},"AuditFields"," with ",[646,767,768],{},"keyId"," via ",[646,771,772],{},"declare module",") so old events stay verifiable against the previous secret. Verifiers should look up the key by id, not assume a single global secret.",[618,775,776,777,782],{},"See ",[778,779,781],"a",{"href":780},"\u002Fuse-cases\u002Faudit\u002Fpipeline#signed","Drains & Integrity"," for the difference between HMAC and hash-chain.",[631,784,786],{"id":785},"redact","Redact",[618,788,789,790,793],{},"Audit events run through your existing ",[646,791,792],{},"RedactConfig",". Compose with the strict audit preset to harden PII handling:",[639,795,797],{"className":641,"code":796,"language":643,"meta":644,"style":644},"import { auditRedactPreset } from 'evlog'\n\ninitLogger({\n  redact: {\n    paths: [\n      ...(auditRedactPreset.paths ?? []),\n    ],\n  },\n})\n",[646,798,799,823,829,839,849,860,883,891,897],{"__ignoreMap":644},[649,800,801,805,807,810,812,815,817,820],{"class":651,"line":652},[649,802,804],{"class":803},"s7zQu","import",[649,806,707],{"class":677},[649,808,809],{"class":659}," auditRedactPreset",[649,811,698],{"class":677},[649,813,814],{"class":803}," from",[649,816,688],{"class":677},[649,818,819],{"class":691},"evlog",[649,821,822],{"class":677},"'\n",[649,824,825],{"class":651,"line":663},[649,826,828],{"emptyLinePlaceholder":827},true,"\n",[649,830,831,834,836],{"class":651,"line":729},[649,832,833],{"class":655},"initLogger",[649,835,669],{"class":659},[649,837,838],{"class":677},"{\n",[649,840,841,844,846],{"class":651,"line":747},[649,842,843],{"class":681},"  redact",[649,845,685],{"class":677},[649,847,848],{"class":677}," {\n",[649,850,852,855,857],{"class":651,"line":851},5,[649,853,854],{"class":681},"    paths",[649,856,685],{"class":677},[649,858,859],{"class":659}," [\n",[649,861,863,866,869,872,875,878,881],{"class":651,"line":862},6,[649,864,865],{"class":677},"      ...",[649,867,868],{"class":659},"(auditRedactPreset",[649,870,871],{"class":677},".",[649,873,874],{"class":659},"paths ",[649,876,877],{"class":677},"??",[649,879,880],{"class":659}," [])",[649,882,726],{"class":677},[649,884,886,889],{"class":651,"line":885},7,[649,887,888],{"class":659},"    ]",[649,890,726],{"class":677},[649,892,894],{"class":651,"line":893},8,[649,895,896],{"class":677},"  },\n",[649,898,900,903],{"class":651,"line":899},9,[649,901,902],{"class":677},"}",[649,904,750],{"class":659},[618,906,907,908,911,912,911,915,918,919,911,922,911,925,911,928,911,931,911,934,937,938,941,942,945,946,871],{},"The preset redacts ",[646,909,910],{},"authorization",", ",[646,913,914],{},"cookie",[646,916,917],{},"set-cookie",", and common credential key names (",[646,920,921],{},"password",[646,923,924],{},"token",[646,926,927],{},"apiKey",[646,929,930],{},"cardNumber",[646,932,933],{},"cvv",[646,935,936],{},"ssn",") ",[622,939,940],{},"at any nesting depth",", including inside ",[646,943,944],{},"audit.changes.before"," \u002F ",[646,947,948],{},"audit.changes.after",[631,950,952],{"id":951},"gdpr-vs-append-only","GDPR vs append-only",[618,954,955],{},"Append-only audit logs collide with GDPR's right to be forgotten. Recommended pattern today:",[957,958,959,963,966],"ol",{},[960,961,962],"li",{},"Keep audit rows immutable.",[960,964,965],{},"Encrypt PII fields with a per-actor key (held outside the audit store).",[960,967,968],{},"To \"forget\" a user, delete their key. The audit row stays, the chain stays valid, the PII becomes unreadable.",[618,970,971,972,975,976,871],{},"A built-in ",[646,973,974],{},"cryptoShredding"," helper is on the ",[778,977,981],{"href":978,"rel":979},"https:\u002F\u002Fgithub.com\u002Fevloghq\u002Fevlog\u002Fissues",[980],"nofollow","follow-up roadmap",[631,983,985],{"id":984},"retention","Retention",[618,987,988],{},"Retention is a storage-layer concern by design. evlog's audit layer doesn't enforce retention windows because every supported drain already has a stronger, audited mechanism for it. Pick the one matching your drain:",[990,991,992,1005],"table",{},[993,994,995],"thead",{},[996,997,998,1002],"tr",{},[999,1000,1001],"th",{},"Drain",[999,1003,1004],{},"Retention mechanism",[1006,1007,1008,1021,1032,1040],"tbody",{},[996,1009,1010,1014],{},[1011,1012,1013],"td",{},"FS",[1011,1015,1016,1017,1020],{},"Combine ",[646,1018,1019],{},"createFsDrain({ maxFiles })"," with a daily compactor.",[996,1022,1023,1026],{},[1011,1024,1025],{},"Postgres",[1011,1027,1028,1029,871],{},"Schedule ",[646,1030,1031],{},"DELETE FROM audit_events WHERE timestamp \u003C now() - interval '7 years'",[996,1033,1034,1037],{},[1011,1035,1036],{},"Axiom \u002F Datadog \u002F Loki",[1011,1038,1039],{},"Set the dataset retention policy in the platform.",[996,1041,1042,1045],{},[1011,1043,1044],{},"S3 Object Lock",[1011,1046,1047],{},"Configure lifecycle rules + Object Lock retention period.",[618,1049,1050],{},"Document the chosen window in your security policy. Auditors care about the written rule, not the enforcing component.",[631,1052,1054],{"id":1053},"common-pitfalls","Common Pitfalls",[1056,1057,1058,1071,1094,1100,1119,1133],"ul",{},[960,1059,1060,1063,1064,765,1067,1070],{},[622,1061,1062],{},"Logging only successes."," Auditors care most about denials. Always pair ",[646,1065,1066],{},"log.audit()",[646,1068,1069],{},"log.audit.deny()"," on the negative branch of every authorisation check.",[960,1072,1073,1079,1080,1083,1084,1086,1087,911,1089,911,1091,1093],{},[622,1074,1075,1076,871],{},"Leaking PII through ",[646,1077,1078],{},"changes"," ",[646,1081,1082],{},"auditDiff()"," runs through your ",[646,1085,792],{},", but only if the field paths are listed. Add ",[646,1088,921],{},[646,1090,924],{},[646,1092,927],{},", etc. once globally so you never have to think about it again.",[960,1095,1096,1099],{},[622,1097,1098],{},"Treating audits as observability."," Don't sample, downsample, or summarise audit events. Force-keep is on by default. Do not disable it.",[960,1101,1102,1079,1109,1111,1112,945,1115,1118],{},[622,1103,1104,1105,1108],{},"Conflating ",[646,1106,1107],{},"actor.id"," with the session id.",[646,1110,1107],{}," is the stable user id (or system identity). Correlate sessions via ",[646,1113,1114],{},"context.requestId",[646,1116,1117],{},"context.traceId",", never via the actor.",[960,1120,1121,1124,1125,1128,1129,1132],{},[622,1122,1123],{},"Forgetting standalone jobs."," Cron tasks, queue workers, and CLIs trigger audit-worthy actions too. Use ",[646,1126,1127],{},"audit()"," (no request) or ",[646,1130,1131],{},"withAudit()"," to keep coverage parity with your HTTP routes.",[960,1134,1135,1142],{},[622,1136,1137,1138,1141],{},"Skipping ",[646,1139,1140],{},"await: true"," on the audit drain."," Without it, audits are fire-and-forget. A crash between the event being emitted and the drain flushing means the action happened but no audit row exists.",[1144,1145,1146],"style",{},"html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .sfNiH, html code.shiki .sfNiH{--shiki-light:#FF5370;--shiki-default:#FF9CAC;--shiki-dark:#FF9CAC}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .s7zQu, html code.shiki .s7zQu{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#89DDFF;--shiki-default-font-style:italic;--shiki-dark:#89DDFF;--shiki-dark-font-style:italic}",{"title":644,"searchDepth":663,"depth":663,"links":1148},[1149,1150,1151,1152,1153],{"id":633,"depth":663,"text":634},{"id":785,"depth":663,"text":786},{"id":951,"depth":663,"text":952},{"id":984,"depth":663,"text":985},{"id":1053,"depth":663,"text":1054},"Integrity, redact presets, GDPR vs append-only, retention windows, and the most common pitfalls when shipping audit logs to production.","md",[1157,1160],{"label":781,"icon":409,"to":407,"color":1158,"variant":1159},"neutral","subtle",{"label":415,"icon":84,"to":416,"color":1158,"variant":1159},{},{"title":411,"icon":388},{"title":411,"description":1154},"eaty2Zo1S4rASyAl6Gj6gIQlclu1msskU-4fakBhs0c",[1166,1168],{"title":406,"path":407,"stem":408,"description":1167,"icon":409,"children":-1},"auditEnricher to auto-fill request context, auditOnly to route audits to a dedicated sink, and signed for tamper-evident HMAC or hash-chain integrity.",{"title":415,"path":416,"stem":417,"description":1169,"icon":84,"children":-1},"File system, Axiom, and Postgres recipes for audit logs, plus mockAudit for tests and the full API reference.",1789294027855]