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signed",[493,602,579],{"class":507},[493,604,605],{"class":575},"createFsDrain",[493,607,579],{"class":507},[493,609,610],{"class":503},"{",[493,612,614],{"class":613},"swJcz"," dir",[493,616,617],{"class":503},":",[493,619,523],{"class":503},[493,621,622],{"class":526},".audit",[493,624,582],{"class":503},[493,626,511],{"class":503},[493,628,629],{"class":613}," maxFiles",[493,631,617],{"class":503},[493,633,635],{"class":634},"sbssI"," 30",[493,637,517],{"class":503},[493,639,640],{"class":507},")",[493,642,511],{"class":503},[493,644,504],{"class":503},[493,646,647],{"class":613}," strategy",[493,649,617],{"class":503},[493,651,523],{"class":503},[493,653,654],{"class":526},"hash-chain",[493,656,582],{"class":503},[493,658,517],{"class":503},[493,660,640],{"class":507},[493,662,663],{"class":503},",\n",[493,665,667,670,673,675,679],{"class":495,"line":666},6,[493,668,669],{"class":503},"  {",[493,671,672],{"class":613}," await",[493,674,617],{"class":503},[493,676,678],{"class":677},"sfNiH"," true",[493,680,681],{"class":503}," },\n",[493,683,685],{"class":495,"line":684},7,[493,686,687],{"class":507},"))\n",[483,689,694],{"className":690,"code":691,"filename":692,"language":693,"meta":489,"style":489},"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",[462,695,696,701],{"__ignoreMap":489},[493,697,698],{"class":495,"line":496},[493,699,700],{},"{\"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",[493,702,703],{"class":495,"line":533},[493,704,705],{},"{\"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",[458,707,708,709,712,713,716],{},"Each line's ",[462,710,711],{},"prevHash"," matches the previous line's ",[462,714,715],{},"hash",". Tampering with any row breaks the chain forward of that point — a verifier replays the hashes and reports the first mismatch.",[475,718,720],{"id":719},"audit-logs-to-a-dedicated-axiom-dataset","Audit logs to a dedicated Axiom dataset",[480,722,723,891,914],{},[483,724,726],{"className":485,"code":725,"filename":487,"language":488,"meta":489,"style":489},"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",[462,727,728,746,766,770,814,840,887],{"__ignoreMap":489},[493,729,730,732,734,736,738,740,742,744],{"class":495,"line":496},[493,731,500],{"class":499},[493,733,504],{"class":503},[493,735,508],{"class":507},[493,737,517],{"class":503},[493,739,520],{"class":499},[493,741,523],{"class":503},[493,743,527],{"class":526},[493,745,530],{"class":503},[493,747,748,750,752,755,757,759,761,764],{"class":495,"line":533},[493,749,500],{"class":499},[493,751,504],{"class":503},[493,753,754],{"class":507}," createAxiomDrain",[493,756,517],{"class":503},[493,758,520],{"class":499},[493,760,523],{"class":503},[493,762,763],{"class":526},"evlog\u002Faxiom",[493,765,530],{"class":503},[493,767,768],{"class":495,"line":554},[493,769,558],{"emptyLinePlaceholder":557},[493,771,772,774,776,778,780,782,784,786,788,790,792,794,796,798,801,803,805,808,810,812],{"class":495,"line":561},[493,773,564],{"class":507},[493,775,567],{"class":503},[493,777,570],{"class":507},[493,779,567],{"class":503},[493,781,576],{"class":575},[493,783,579],{"class":507},[493,785,582],{"class":503},[493,787,585],{"class":526},[493,789,582],{"class":503},[493,791,511],{"class":503},[493,793,754],{"class":575},[493,795,579],{"class":507},[493,797,610],{"class":503},[493,799,800],{"class":613}," dataset",[493,802,617],{"class":503},[493,804,523],{"class":503},[493,806,807],{"class":526},"logs",[493,809,582],{"class":503},[493,811,517],{"class":503},[493,813,687],{"class":507},[493,815,816,818,820,822,824,826,828,830,832,834,836,838],{"class":495,"line":597},[493,817,564],{"class":507},[493,819,567],{"class":503},[493,821,570],{"class":507},[493,823,567],{"class":503},[493,825,576],{"class":575},[493,827,579],{"class":507},[493,829,582],{"class":503},[493,831,585],{"class":526},[493,833,582],{"class":503},[493,835,511],{"class":503},[493,837,508],{"class":575},[493,839,594],{"class":507},[493,841,842,845,847,849,851,853,855,858,860,862,865,867,870,872,875,877,880,883,885],{"class":495,"line":666},[493,843,844],{"class":575},"  createAxiomDrain",[493,846,579],{"class":507},[493,848,610],{"class":503},[493,850,800],{"class":613},[493,852,617],{"class":503},[493,854,523],{"class":503},[493,856,857],{"class":526},"audit",[493,859,582],{"class":503},[493,861,511],{"class":503},[493,863,864],{"class":613}," apiKey",[493,866,617],{"class":503},[493,868,869],{"class":507}," process",[493,871,567],{"class":503},[493,873,874],{"class":507},"env",[493,876,567],{"class":503},[493,878,879],{"class":507},"AXIOM_AUDIT_API_KEY ",[493,881,882],{"class":503},"}",[493,884,640],{"class":507},[493,886,663],{"class":503},[493,888,889],{"class":495,"line":684},[493,890,687],{"class":507},[483,892,897],{"className":893,"code":894,"filename":895,"language":896,"meta":489,"style":489},"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",[462,898,899,904,909],{"__ignoreMap":489},[493,900,901],{"class":495,"line":496},[493,902,903],{},"['audit']\n",[493,905,906],{"class":495,"line":533},[493,907,908],{},"| where audit.action == \"invoice.refund\"\n",[493,910,911],{"class":495,"line":554},[493,912,913],{},"| summarize count() by audit.outcome, bin(_time, 1h)\n",[483,915,918],{"className":893,"code":916,"filename":917,"language":896,"meta":489,"style":489},"['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",[462,919,920,924,929,934],{"__ignoreMap":489},[493,921,922],{"class":495,"line":496},[493,923,903],{},[493,925,926],{"class":495,"line":533},[493,927,928],{},"| where audit.outcome == \"denied\"\n",[493,930,931],{"class":495,"line":554},[493,932,933],{},"| summarize count() by audit.actor.id, audit.action\n",[493,935,936],{"class":495,"line":561},[493,937,938],{},"| order by count_ desc\n",[458,940,941],{},"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.",[475,943,945],{"id":944},"audit-logs-in-postgres","Audit logs in Postgres",[480,947,948,1204],{},[483,949,951],{"className":485,"code":950,"filename":487,"language":488,"meta":489,"style":489},"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",[462,952,953,971,993,997,1032,1062,1089,1119,1135,1151,1157,1162],{"__ignoreMap":489},[493,954,955,957,959,961,963,965,967,969],{"class":495,"line":496},[493,956,500],{"class":499},[493,958,504],{"class":503},[493,960,508],{"class":507},[493,962,517],{"class":503},[493,964,520],{"class":499},[493,966,523],{"class":503},[493,968,527],{"class":526},[493,970,530],{"class":503},[493,972,973,975,978,980,983,985,987,989,991],{"class":495,"line":533},[493,974,500],{"class":499},[493,976,977],{"class":499}," type",[493,979,504],{"class":503},[493,981,982],{"class":507}," DrainContext",[493,984,517],{"class":503},[493,986,520],{"class":499},[493,988,523],{"class":503},[493,990,527],{"class":526},[493,992,530],{"class":503},[493,994,995],{"class":495,"line":554},[493,996,558],{"emptyLinePlaceholder":557},[493,998,999,1003,1006,1009,1012,1015,1019,1021,1024,1026,1029],{"class":495,"line":561},[493,1000,1002],{"class":1001},"spNyl","const",[493,1004,1005],{"class":507}," postgresAudit ",[493,1007,1008],{"class":503},"=",[493,1010,1011],{"class":1001}," async",[493,1013,1014],{"class":503}," (",[493,1016,1018],{"class":1017},"sHdIc","ctx",[493,1020,617],{"class":503},[493,1022,982],{"class":1023},"sBMFI",[493,1025,640],{"class":503},[493,1027,1028],{"class":1001}," =>",[493,1030,1031],{"class":503}," {\n",[493,1033,1034,1037,1040,1042,1045,1047,1050,1052,1054,1057,1059],{"class":495,"line":597},[493,1035,1036],{"class":499},"  await",[493,1038,1039],{"class":507}," db",[493,1041,567],{"class":503},[493,1043,1044],{"class":575},"insert",[493,1046,579],{"class":613},[493,1048,1049],{"class":507},"auditEvents",[493,1051,640],{"class":613},[493,1053,567],{"class":503},[493,1055,1056],{"class":575},"values",[493,1058,579],{"class":613},[493,1060,1061],{"class":503},"{\n",[493,1063,1064,1067,1069,1072,1074,1077,1079,1081,1084,1087],{"class":495,"line":666},[493,1065,1066],{"class":613},"    id",[493,1068,617],{"class":503},[493,1070,1071],{"class":507}," ctx",[493,1073,567],{"class":503},[493,1075,1076],{"class":507},"event",[493,1078,567],{"class":503},[493,1080,857],{"class":507},[493,1082,1083],{"class":503},"!.",[493,1085,1086],{"class":507},"idempotencyKey",[493,1088,663],{"class":503},[493,1090,1091,1094,1096,1099,1102,1104,1106,1108,1110,1112,1115,1117],{"class":495,"line":684},[493,1092,1093],{"class":613},"    timestamp",[493,1095,617],{"class":503},[493,1097,1098],{"class":503}," new",[493,1100,1101],{"class":575}," Date",[493,1103,579],{"class":613},[493,1105,1018],{"class":507},[493,1107,567],{"class":503},[493,1109,1076],{"class":507},[493,1111,567],{"class":503},[493,1113,1114],{"class":507},"timestamp",[493,1116,640],{"class":613},[493,1118,663],{"class":503},[493,1120,1122,1125,1127,1129,1131,1133],{"class":495,"line":1121},8,[493,1123,1124],{"class":613},"    payload",[493,1126,617],{"class":503},[493,1128,1071],{"class":507},[493,1130,567],{"class":503},[493,1132,1076],{"class":507},[493,1134,663],{"class":503},[493,1136,1138,1141,1143,1145,1148],{"class":495,"line":1137},9,[493,1139,1140],{"class":503},"  }",[493,1142,640],{"class":613},[493,1144,567],{"class":503},[493,1146,1147],{"class":575},"onConflictDoNothing",[493,1149,1150],{"class":613},"()\n",[493,1152,1154],{"class":495,"line":1153},10,[493,1155,1156],{"class":503},"}\n",[493,1158,1160],{"class":495,"line":1159},11,[493,1161,558],{"emptyLinePlaceholder":557},[493,1163,1165,1167,1169,1171,1173,1175,1177,1179,1181,1183,1185,1187,1190,1192,1194,1196,1198,1200,1202],{"class":495,"line":1164},12,[493,1166,564],{"class":507},[493,1168,567],{"class":503},[493,1170,570],{"class":507},[493,1172,567],{"class":503},[493,1174,576],{"class":575},[493,1176,579],{"class":507},[493,1178,582],{"class":503},[493,1180,585],{"class":526},[493,1182,582],{"class":503},[493,1184,511],{"class":503},[493,1186,508],{"class":575},[493,1188,1189],{"class":507},"(postgresAudit",[493,1191,511],{"class":503},[493,1193,504],{"class":503},[493,1195,672],{"class":613},[493,1197,617],{"class":503},[493,1199,678],{"class":677},[493,1201,517],{"class":503},[493,1203,687],{"class":507},[483,1205,1210],{"className":1206,"code":1207,"filename":1208,"language":1209,"meta":489,"style":489},"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",[462,1211,1212,1217,1222,1227,1232,1236,1241,1246],{"__ignoreMap":489},[493,1213,1214],{"class":495,"line":496},[493,1215,1216],{},"SELECT id, timestamp, payload->'audit'->>'action' AS action,\n",[493,1218,1219],{"class":495,"line":533},[493,1220,1221],{},"       payload->'audit'->>'outcome' AS outcome\n",[493,1223,1224],{"class":495,"line":554},[493,1225,1226],{},"FROM audit_events\n",[493,1228,1229],{"class":495,"line":561},[493,1230,1231],{},"WHERE id = 'ak_8f3c4b2a1e5d6f7c';\n",[493,1233,1234],{"class":495,"line":597},[493,1235,558],{"emptyLinePlaceholder":557},[493,1237,1238],{"class":495,"line":666},[493,1239,1240],{},"--          id          |       timestamp       |     action      | outcome\n",[493,1242,1243],{"class":495,"line":684},[493,1244,1245],{},"-- ---------------------+-----------------------+-----------------+---------\n",[493,1247,1248],{"class":495,"line":1121},[493,1249,1250],{},"--  ak_8f3c4b2a1e5d6f7c | 2026-04-24 10:23:45.6 | invoice.refund  | success\n",[458,1252,1253,1254,1256,1257,1260],{},"The deterministic ",[462,1255,1086],{}," makes retries safe — duplicate inserts collapse via ",[462,1258,1259],{},"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.",[475,1262,1264],{"id":1263},"testing-audits","Testing audits",[458,1266,1267,1270,1271,465,1274,1277,1278,617],{},[462,1268,1269],{},"mockAudit()"," captures every audit event on emit — from standalone ",[462,1272,1273],{},"audit()",[462,1275,1276],{},"log.audit()",", and ",[462,1279,1280],{},"log.set({ audit })",[483,1282,1284],{"className":485,"code":1283,"language":488,"meta":489,"style":489},"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",[462,1285,1286,1305,1309,1334,1349,1353,1419,1423,1437,1453,1487,1503,1509,1514,1526],{"__ignoreMap":489},[493,1287,1288,1290,1292,1295,1297,1299,1301,1303],{"class":495,"line":496},[493,1289,500],{"class":499},[493,1291,504],{"class":503},[493,1293,1294],{"class":507}," mockAudit",[493,1296,517],{"class":503},[493,1298,520],{"class":499},[493,1300,523],{"class":503},[493,1302,527],{"class":526},[493,1304,530],{"class":503},[493,1306,1307],{"class":495,"line":533},[493,1308,558],{"emptyLinePlaceholder":557},[493,1310,1311,1314,1316,1318,1321,1323,1325,1327,1330,1332],{"class":495,"line":554},[493,1312,1313],{"class":575},"it",[493,1315,579],{"class":507},[493,1317,582],{"class":503},[493,1319,1320],{"class":526},"refunds the invoice and records an audit",[493,1322,582],{"class":503},[493,1324,511],{"class":503},[493,1326,1011],{"class":1001},[493,1328,1329],{"class":503}," ()",[493,1331,1028],{"class":1001},[493,1333,1031],{"class":503},[493,1335,1336,1339,1342,1345,1347],{"class":495,"line":561},[493,1337,1338],{"class":1001},"  const",[493,1340,1341],{"class":507}," captured",[493,1343,1344],{"class":503}," =",[493,1346,1294],{"class":575},[493,1348,1150],{"class":613},[493,1350,1351],{"class":495,"line":597},[493,1352,558],{"emptyLinePlaceholder":557},[493,1354,1355,1357,1360,1362,1364,1367,1369,1371,1374,1376,1379,1381,1384,1386,1388,1390,1392,1394,1397,1399,1401,1403,1405,1407,1410,1412,1414,1416],{"class":495,"line":666},[493,1356,1036],{"class":499},[493,1358,1359],{"class":575}," refundInvoice",[493,1361,579],{"class":613},[493,1363,610],{"class":503},[493,1365,1366],{"class":613}," id",[493,1368,617],{"class":503},[493,1370,523],{"class":503},[493,1372,1373],{"class":526},"inv_889",[493,1375,582],{"class":503},[493,1377,1378],{"class":503}," },",[493,1380,504],{"class":503},[493,1382,1383],{"class":613}," actor",[493,1385,617],{"class":503},[493,1387,504],{"class":503},[493,1389,977],{"class":613},[493,1391,617],{"class":503},[493,1393,523],{"class":503},[493,1395,1396],{"class":526},"user",[493,1398,582],{"class":503},[493,1400,511],{"class":503},[493,1402,1366],{"class":613},[493,1404,617],{"class":503},[493,1406,523],{"class":503},[493,1408,1409],{"class":526},"u1",[493,1411,582],{"class":503},[493,1413,517],{"class":503},[493,1415,517],{"class":503},[493,1417,1418],{"class":613},")\n",[493,1420,1421],{"class":495,"line":684},[493,1422,558],{"emptyLinePlaceholder":557},[493,1424,1425,1428,1430,1433,1435],{"class":495,"line":1121},[493,1426,1427],{"class":507},"  captured",[493,1429,567],{"class":503},[493,1431,1432],{"class":575},"assertAudit",[493,1434,579],{"class":613},[493,1436,1061],{"class":503},[493,1438,1439,1442,1444,1446,1449,1451],{"class":495,"line":1137},[493,1440,1441],{"class":613},"    action",[493,1443,617],{"class":503},[493,1445,523],{"class":503},[493,1447,1448],{"class":526},"invoice.refund",[493,1450,582],{"class":503},[493,1452,663],{"class":503},[493,1454,1455,1458,1460,1462,1464,1466,1468,1471,1473,1475,1477,1479,1481,1483,1485],{"class":495,"line":1153},[493,1456,1457],{"class":613},"    target",[493,1459,617],{"class":503},[493,1461,504],{"class":503},[493,1463,977],{"class":613},[493,1465,617],{"class":503},[493,1467,523],{"class":503},[493,1469,1470],{"class":526},"invoice",[493,1472,582],{"class":503},[493,1474,511],{"class":503},[493,1476,1366],{"class":613},[493,1478,617],{"class":503},[493,1480,523],{"class":503},[493,1482,1373],{"class":526},[493,1484,582],{"class":503},[493,1486,681],{"class":503},[493,1488,1489,1492,1494,1496,1499,1501],{"class":495,"line":1159},[493,1490,1491],{"class":613},"    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