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signed",[489,598,575],{"class":503},[489,600,601],{"class":571},"createFsDrain",[489,603,575],{"class":503},[489,605,606],{"class":499},"{",[489,608,610],{"class":609},"swJcz"," dir",[489,612,613],{"class":499},":",[489,615,519],{"class":499},[489,617,618],{"class":522},".audit",[489,620,578],{"class":499},[489,622,507],{"class":499},[489,624,625],{"class":609}," maxFiles",[489,627,613],{"class":499},[489,629,631],{"class":630},"sbssI"," 30",[489,633,513],{"class":499},[489,635,636],{"class":503},")",[489,638,507],{"class":499},[489,640,500],{"class":499},[489,642,643],{"class":609}," strategy",[489,645,613],{"class":499},[489,647,519],{"class":499},[489,649,650],{"class":522},"hash-chain",[489,652,578],{"class":499},[489,654,513],{"class":499},[489,656,636],{"class":503},[489,658,659],{"class":499},",\n",[489,661,663,666,669,671,675],{"class":491,"line":662},6,[489,664,665],{"class":499},"  {",[489,667,668],{"class":609}," await",[489,670,613],{"class":499},[489,672,674],{"class":673},"sfNiH"," true",[489,676,677],{"class":499}," },\n",[489,679,681],{"class":491,"line":680},7,[489,682,683],{"class":503},"))\n",[479,685,690],{"className":686,"code":687,"filename":688,"language":689,"meta":485,"style":485},"language-ndjson shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","{\"audit\":{\"action\":\"invoice.refund\",\"actor\":{\"type\":\"user\",\"id\":\"usr_42\"},\"target\":{\"type\":\"invoice\",\"id\":\"inv_889\"},\"outcome\":\"success\",\"version\":1,\"idempotencyKey\":\"ak_8f3c4b2a1e5d6f7c\",\"prevHash\":null,\"hash\":\"3f2c8e1a...\"}}\n{\"audit\":{\"action\":\"user.update\",\"actor\":{\"type\":\"user\",\"id\":\"usr_42\"},\"target\":{\"type\":\"user\",\"id\":\"usr_99\"},\"outcome\":\"success\",\"version\":1,\"idempotencyKey\":\"ak_5e7d8f9a0b1c2d3e\",\"prevHash\":\"3f2c8e1a...\",\"hash\":\"9a1b4d7c...\"}}\n","Output — .audit\u002F2026-04-24.ndjson","ndjson",[458,691,692,697],{"__ignoreMap":485},[489,693,694],{"class":491,"line":492},[489,695,696],{},"{\"audit\":{\"action\":\"invoice.refund\",\"actor\":{\"type\":\"user\",\"id\":\"usr_42\"},\"target\":{\"type\":\"invoice\",\"id\":\"inv_889\"},\"outcome\":\"success\",\"version\":1,\"idempotencyKey\":\"ak_8f3c4b2a1e5d6f7c\",\"prevHash\":null,\"hash\":\"3f2c8e1a...\"}}\n",[489,698,699],{"class":491,"line":529},[489,700,701],{},"{\"audit\":{\"action\":\"user.update\",\"actor\":{\"type\":\"user\",\"id\":\"usr_42\"},\"target\":{\"type\":\"user\",\"id\":\"usr_99\"},\"outcome\":\"success\",\"version\":1,\"idempotencyKey\":\"ak_5e7d8f9a0b1c2d3e\",\"prevHash\":\"3f2c8e1a...\",\"hash\":\"9a1b4d7c...\"}}\n",[454,703,704,705,708,709,712],{},"Each line's ",[458,706,707],{},"prevHash"," matches the previous line's ",[458,710,711],{},"hash",". Tampering with any row breaks the chain forward of that point — a verifier replays the hashes and reports the first mismatch.",[471,714,716],{"id":715},"audit-logs-to-a-dedicated-axiom-dataset","Audit logs to a dedicated Axiom dataset",[476,718,719,887,910],{},[479,720,722],{"className":481,"code":721,"filename":483,"language":484,"meta":485,"style":485},"import { auditOnly } from 'evlog'\nimport { createAxiomDrain } from 'evlog\u002Faxiom'\n\nnitro.hooks.hook('evlog:drain', createAxiomDrain({ dataset: 'logs' }))\nnitro.hooks.hook('evlog:drain', auditOnly(\n  createAxiomDrain({ dataset: 'audit', apiKey: process.env.AXIOM_AUDIT_API_KEY }),\n))\n",[458,723,724,742,762,766,810,836,883],{"__ignoreMap":485},[489,725,726,728,730,732,734,736,738,740],{"class":491,"line":492},[489,727,496],{"class":495},[489,729,500],{"class":499},[489,731,504],{"class":503},[489,733,513],{"class":499},[489,735,516],{"class":495},[489,737,519],{"class":499},[489,739,523],{"class":522},[489,741,526],{"class":499},[489,743,744,746,748,751,753,755,757,760],{"class":491,"line":529},[489,745,496],{"class":495},[489,747,500],{"class":499},[489,749,750],{"class":503}," createAxiomDrain",[489,752,513],{"class":499},[489,754,516],{"class":495},[489,756,519],{"class":499},[489,758,759],{"class":522},"evlog\u002Faxiom",[489,761,526],{"class":499},[489,763,764],{"class":491,"line":550},[489,765,554],{"emptyLinePlaceholder":553},[489,767,768,770,772,774,776,778,780,782,784,786,788,790,792,794,797,799,801,804,806,808],{"class":491,"line":557},[489,769,560],{"class":503},[489,771,563],{"class":499},[489,773,566],{"class":503},[489,775,563],{"class":499},[489,777,572],{"class":571},[489,779,575],{"class":503},[489,781,578],{"class":499},[489,783,581],{"class":522},[489,785,578],{"class":499},[489,787,507],{"class":499},[489,789,750],{"class":571},[489,791,575],{"class":503},[489,793,606],{"class":499},[489,795,796],{"class":609}," dataset",[489,798,613],{"class":499},[489,800,519],{"class":499},[489,802,803],{"class":522},"logs",[489,805,578],{"class":499},[489,807,513],{"class":499},[489,809,683],{"class":503},[489,811,812,814,816,818,820,822,824,826,828,830,832,834],{"class":491,"line":593},[489,813,560],{"class":503},[489,815,563],{"class":499},[489,817,566],{"class":503},[489,819,563],{"class":499},[489,821,572],{"class":571},[489,823,575],{"class":503},[489,825,578],{"class":499},[489,827,581],{"class":522},[489,829,578],{"class":499},[489,831,507],{"class":499},[489,833,504],{"class":571},[489,835,590],{"class":503},[489,837,838,841,843,845,847,849,851,854,856,858,861,863,866,868,871,873,876,879,881],{"class":491,"line":662},[489,839,840],{"class":571},"  createAxiomDrain",[489,842,575],{"class":503},[489,844,606],{"class":499},[489,846,796],{"class":609},[489,848,613],{"class":499},[489,850,519],{"class":499},[489,852,853],{"class":522},"audit",[489,855,578],{"class":499},[489,857,507],{"class":499},[489,859,860],{"class":609}," apiKey",[489,862,613],{"class":499},[489,864,865],{"class":503}," process",[489,867,563],{"class":499},[489,869,870],{"class":503},"env",[489,872,563],{"class":499},[489,874,875],{"class":503},"AXIOM_AUDIT_API_KEY ",[489,877,878],{"class":499},"}",[489,880,636],{"class":503},[489,882,659],{"class":499},[489,884,885],{"class":491,"line":680},[489,886,683],{"class":503},[479,888,893],{"className":889,"code":890,"filename":891,"language":892,"meta":485,"style":485},"language-kusto shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","['audit']\n| where audit.action == \"invoice.refund\"\n| summarize count() by audit.outcome, bin(_time, 1h)\n","Output — Axiom query","kusto",[458,894,895,900,905],{"__ignoreMap":485},[489,896,897],{"class":491,"line":492},[489,898,899],{},"['audit']\n",[489,901,902],{"class":491,"line":529},[489,903,904],{},"| where audit.action == \"invoice.refund\"\n",[489,906,907],{"class":491,"line":550},[489,908,909],{},"| summarize count() by audit.outcome, bin(_time, 1h)\n",[479,911,914],{"className":889,"code":912,"filename":913,"language":892,"meta":485,"style":485},"['audit']\n| where audit.outcome == \"denied\"\n| summarize count() by audit.actor.id, audit.action\n| order by count_ desc\n","Output — denials by actor",[458,915,916,920,925,930],{"__ignoreMap":485},[489,917,918],{"class":491,"line":492},[489,919,899],{},[489,921,922],{"class":491,"line":529},[489,923,924],{},"| where audit.outcome == \"denied\"\n",[489,926,927],{"class":491,"line":550},[489,928,929],{},"| summarize count() by audit.actor.id, audit.action\n",[489,931,932],{"class":491,"line":557},[489,933,934],{},"| order by count_ desc\n",[454,936,937],{},"Splitting datasets means the audit dataset can have a longer retention (7y), tighter access controls, and a separate billing line — without touching the rest of your pipeline.",[471,939,941],{"id":940},"audit-logs-in-postgres","Audit logs in Postgres",[476,943,944,1200],{},[479,945,947],{"className":481,"code":946,"filename":483,"language":484,"meta":485,"style":485},"import { auditOnly } from 'evlog'\nimport type { DrainContext } from 'evlog'\n\nconst postgresAudit = async (ctx: DrainContext) => {\n  await db.insert(auditEvents).values({\n    id: ctx.event.audit!.idempotencyKey,\n    timestamp: new Date(ctx.event.timestamp),\n    payload: ctx.event,\n  }).onConflictDoNothing()\n}\n\nnitro.hooks.hook('evlog:drain', auditOnly(postgresAudit, { await: true }))\n",[458,948,949,967,989,993,1028,1058,1085,1115,1131,1147,1153,1158],{"__ignoreMap":485},[489,950,951,953,955,957,959,961,963,965],{"class":491,"line":492},[489,952,496],{"class":495},[489,954,500],{"class":499},[489,956,504],{"class":503},[489,958,513],{"class":499},[489,960,516],{"class":495},[489,962,519],{"class":499},[489,964,523],{"class":522},[489,966,526],{"class":499},[489,968,969,971,974,976,979,981,983,985,987],{"class":491,"line":529},[489,970,496],{"class":495},[489,972,973],{"class":495}," type",[489,975,500],{"class":499},[489,977,978],{"class":503}," DrainContext",[489,980,513],{"class":499},[489,982,516],{"class":495},[489,984,519],{"class":499},[489,986,523],{"class":522},[489,988,526],{"class":499},[489,990,991],{"class":491,"line":550},[489,992,554],{"emptyLinePlaceholder":553},[489,994,995,999,1002,1005,1008,1011,1015,1017,1020,1022,1025],{"class":491,"line":557},[489,996,998],{"class":997},"spNyl","const",[489,1000,1001],{"class":503}," postgresAudit ",[489,1003,1004],{"class":499},"=",[489,1006,1007],{"class":997}," async",[489,1009,1010],{"class":499}," (",[489,1012,1014],{"class":1013},"sHdIc","ctx",[489,1016,613],{"class":499},[489,1018,978],{"class":1019},"sBMFI",[489,1021,636],{"class":499},[489,1023,1024],{"class":997}," =>",[489,1026,1027],{"class":499}," {\n",[489,1029,1030,1033,1036,1038,1041,1043,1046,1048,1050,1053,1055],{"class":491,"line":593},[489,1031,1032],{"class":495},"  await",[489,1034,1035],{"class":503}," db",[489,1037,563],{"class":499},[489,1039,1040],{"class":571},"insert",[489,1042,575],{"class":609},[489,1044,1045],{"class":503},"auditEvents",[489,1047,636],{"class":609},[489,1049,563],{"class":499},[489,1051,1052],{"class":571},"values",[489,1054,575],{"class":609},[489,1056,1057],{"class":499},"{\n",[489,1059,1060,1063,1065,1068,1070,1073,1075,1077,1080,1083],{"class":491,"line":662},[489,1061,1062],{"class":609},"    id",[489,1064,613],{"class":499},[489,1066,1067],{"class":503}," ctx",[489,1069,563],{"class":499},[489,1071,1072],{"class":503},"event",[489,1074,563],{"class":499},[489,1076,853],{"class":503},[489,1078,1079],{"class":499},"!.",[489,1081,1082],{"class":503},"idempotencyKey",[489,1084,659],{"class":499},[489,1086,1087,1090,1092,1095,1098,1100,1102,1104,1106,1108,1111,1113],{"class":491,"line":680},[489,1088,1089],{"class":609},"    timestamp",[489,1091,613],{"class":499},[489,1093,1094],{"class":499}," new",[489,1096,1097],{"class":571}," Date",[489,1099,575],{"class":609},[489,1101,1014],{"class":503},[489,1103,563],{"class":499},[489,1105,1072],{"class":503},[489,1107,563],{"class":499},[489,1109,1110],{"class":503},"timestamp",[489,1112,636],{"class":609},[489,1114,659],{"class":499},[489,1116,1118,1121,1123,1125,1127,1129],{"class":491,"line":1117},8,[489,1119,1120],{"class":609},"    payload",[489,1122,613],{"class":499},[489,1124,1067],{"class":503},[489,1126,563],{"class":499},[489,1128,1072],{"class":503},[489,1130,659],{"class":499},[489,1132,1134,1137,1139,1141,1144],{"class":491,"line":1133},9,[489,1135,1136],{"class":499},"  }",[489,1138,636],{"class":609},[489,1140,563],{"class":499},[489,1142,1143],{"class":571},"onConflictDoNothing",[489,1145,1146],{"class":609},"()\n",[489,1148,1150],{"class":491,"line":1149},10,[489,1151,1152],{"class":499},"}\n",[489,1154,1156],{"class":491,"line":1155},11,[489,1157,554],{"emptyLinePlaceholder":553},[489,1159,1161,1163,1165,1167,1169,1171,1173,1175,1177,1179,1181,1183,1186,1188,1190,1192,1194,1196,1198],{"class":491,"line":1160},12,[489,1162,560],{"class":503},[489,1164,563],{"class":499},[489,1166,566],{"class":503},[489,1168,563],{"class":499},[489,1170,572],{"class":571},[489,1172,575],{"class":503},[489,1174,578],{"class":499},[489,1176,581],{"class":522},[489,1178,578],{"class":499},[489,1180,507],{"class":499},[489,1182,504],{"class":571},[489,1184,1185],{"class":503},"(postgresAudit",[489,1187,507],{"class":499},[489,1189,500],{"class":499},[489,1191,668],{"class":609},[489,1193,613],{"class":499},[489,1195,674],{"class":673},[489,1197,513],{"class":499},[489,1199,683],{"class":503},[479,1201,1206],{"className":1202,"code":1203,"filename":1204,"language":1205,"meta":485,"style":485},"language-sql shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","SELECT id, timestamp, payload->'audit'->>'action' AS action,\n       payload->'audit'->>'outcome' AS outcome\nFROM audit_events\nWHERE id = 'ak_8f3c4b2a1e5d6f7c';\n\n--          id          |       timestamp       |     action      | outcome\n-- ---------------------+-----------------------+-----------------+---------\n--  ak_8f3c4b2a1e5d6f7c | 2026-04-24 10:23:45.6 | invoice.refund  | success\n","Output — audit_events row","sql",[458,1207,1208,1213,1218,1223,1228,1232,1237,1242],{"__ignoreMap":485},[489,1209,1210],{"class":491,"line":492},[489,1211,1212],{},"SELECT id, timestamp, payload->'audit'->>'action' AS action,\n",[489,1214,1215],{"class":491,"line":529},[489,1216,1217],{},"       payload->'audit'->>'outcome' AS outcome\n",[489,1219,1220],{"class":491,"line":550},[489,1221,1222],{},"FROM audit_events\n",[489,1224,1225],{"class":491,"line":557},[489,1226,1227],{},"WHERE id = 'ak_8f3c4b2a1e5d6f7c';\n",[489,1229,1230],{"class":491,"line":593},[489,1231,554],{"emptyLinePlaceholder":553},[489,1233,1234],{"class":491,"line":662},[489,1235,1236],{},"--          id          |       timestamp       |     action      | outcome\n",[489,1238,1239],{"class":491,"line":680},[489,1240,1241],{},"-- ---------------------+-----------------------+-----------------+---------\n",[489,1243,1244],{"class":491,"line":1117},[489,1245,1246],{},"--  ak_8f3c4b2a1e5d6f7c | 2026-04-24 10:23:45.6 | invoice.refund  | success\n",[454,1248,1249,1250,1252,1253,1256],{},"The deterministic ",[458,1251,1082],{}," makes retries safe — duplicate inserts collapse via ",[458,1254,1255],{},"ON CONFLICT DO NOTHING",". Without it, a transient network blip during a retry would create a duplicate audit row, which is exactly what you don't want.",[471,1258,1260],{"id":1259},"testing-audits","Testing audits",[454,1262,1263,1266,1267,461,1270,1273,1274,613],{},[458,1264,1265],{},"mockAudit()"," captures every audit event on emit — from standalone ",[458,1268,1269],{},"audit()",[458,1271,1272],{},"log.audit()",", and ",[458,1275,1276],{},"log.set({ audit })",[479,1278,1280],{"className":481,"code":1279,"language":484,"meta":485,"style":485},"import { mockAudit } from 'evlog'\n\nit('refunds the invoice and records an audit', async () => {\n  const captured = mockAudit()\n\n  await refundInvoice({ id: 'inv_889' }, { actor: { type: 'user', id: 'u1' } })\n\n  captured.assertAudit({\n    action: 'invoice.refund',\n    target: { type: 'invoice', id: 'inv_889' },\n    outcome: 'success',\n  })\n\n  captured.restore()\n})\n",[458,1281,1282,1301,1305,1330,1345,1349,1415,1419,1433,1449,1483,1499,1505,1510,1522],{"__ignoreMap":485},[489,1283,1284,1286,1288,1291,1293,1295,1297,1299],{"class":491,"line":492},[489,1285,496],{"class":495},[489,1287,500],{"class":499},[489,1289,1290],{"class":503}," mockAudit",[489,1292,513],{"class":499},[489,1294,516],{"class":495},[489,1296,519],{"class":499},[489,1298,523],{"class":522},[489,1300,526],{"class":499},[489,1302,1303],{"class":491,"line":529},[489,1304,554],{"emptyLinePlaceholder":553},[489,1306,1307,1310,1312,1314,1317,1319,1321,1323,1326,1328],{"class":491,"line":550},[489,1308,1309],{"class":571},"it",[489,1311,575],{"class":503},[489,1313,578],{"class":499},[489,1315,1316],{"class":522},"refunds the invoice and records an audit",[489,1318,578],{"class":499},[489,1320,507],{"class":499},[489,1322,1007],{"class":997},[489,1324,1325],{"class":499}," ()",[489,1327,1024],{"class":997},[489,1329,1027],{"class":499},[489,1331,1332,1335,1338,1341,1343],{"class":491,"line":557},[489,1333,1334],{"class":997},"  const",[489,1336,1337],{"class":503}," captured",[489,1339,1340],{"class":499}," =",[489,1342,1290],{"class":571},[489,1344,1146],{"class":609},[489,1346,1347],{"class":491,"line":593},[489,1348,554],{"emptyLinePlaceholder":553},[489,1350,1351,1353,1356,1358,1360,1363,1365,1367,1370,1372,1375,1377,1380,1382,1384,1386,1388,1390,1393,1395,1397,1399,1401,1403,1406,1408,1410,1412],{"class":491,"line":662},[489,1352,1032],{"class":495},[489,1354,1355],{"class":571}," refundInvoice",[489,1357,575],{"class":609},[489,1359,606],{"class":499},[489,1361,1362],{"class":609}," id",[489,1364,613],{"class":499},[489,1366,519],{"class":499},[489,1368,1369],{"class":522},"inv_889",[489,1371,578],{"class":499},[489,1373,1374],{"class":499}," },",[489,1376,500],{"class":499},[489,1378,1379],{"class":609}," actor",[489,1381,613],{"class":499},[489,1383,500],{"class":499},[489,1385,973],{"class":609},[489,1387,613],{"class":499},[489,1389,519],{"class":499},[489,1391,1392],{"class":522},"user",[489,1394,578],{"class":499},[489,1396,507],{"class":499},[489,1398,1362],{"class":609},[489,1400,613],{"class":499},[489,1402,519],{"class":499},[489,1404,1405],{"class":522},"u1",[489,1407,578],{"class":499},[489,1409,513],{"class":499},[489,1411,513],{"class":499},[489,1413,1414],{"class":609},")\n",[489,1416,1417],{"class":491,"line":680},[489,1418,554],{"emptyLinePlaceholder":553},[489,1420,1421,1424,1426,1429,1431],{"class":491,"line":1117},[489,1422,1423],{"class":503},"  captured",[489,1425,563],{"class":499},[489,1427,1428],{"class":571},"assertAudit",[489,1430,575],{"class":609},[489,1432,1057],{"class":499},[489,1434,1435,1438,1440,1442,1445,1447],{"class":491,"line":1133},[489,1436,1437],{"class":609},"    action",[489,1439,613],{"class":499},[489,1441,519],{"class":499},[489,1443,1444],{"class":522},"invoice.refund",[489,1446,578],{"class":499},[489,1448,659],{"class":499},[489,1450,1451,1454,1456,1458,1460,1462,1464,1467,1469,1471,1473,1475,1477,1479,1481],{"class":491,"line":1149},[489,1452,1453],{"class":609},"    target",[489,1455,613],{"class":499},[489,1457,500],{"class":499},[489,1459,973],{"class":609},[489,1461,613],{"class":499},[489,1463,519],{"class":499},[489,1465,1466],{"class":522},"invoice",[489,1468,578],{"class":499},[489,1470,507],{"class":499},[489,1472,1362],{"class":609},[489,1474,613],{"class":499},[489,1476,519],{"class":499},[489,1478,1369],{"class":522},[489,1480,578],{"class":499},[489,1482,677],{"class":499},[489,1484,1485,1488,1490,1492,1495,1497],{"class":491,"line":1155},[489,1486,1487],{"class":609},"    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