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When you need a destination that isn't covered, you write your own.",[454,468,469],{},"Two factories cover every case:",[471,472,473,486],"table",{},[474,475,476],"thead",{},[477,478,479,483],"tr",{},[480,481,482],"th",{},"You have…",[480,484,485],{},"Use",[487,488,489,508],"tbody",{},[477,490,491,500],{},[492,493,494,495,499],"td",{},"An HTTP backend (REST, JSON ingest, vendor ",[496,497,498],"code",{},"\u002Fv1\u002Flogs"," endpoint)",[492,501,502],{},[463,503,505],{"href":504},"#definehttpdrain-the-http-recipe",[496,506,507],{},"defineHttpDrain",[477,509,510,513],{},[492,511,512],{},"A non-HTTP transport (gRPC, WebSocket, vendor SDK, queue, raw socket)",[492,514,515],{},[463,516,518],{"href":517},"#definedrain-non-http-transports",[496,519,520],{},"defineDrain",[454,522,523,524,527],{},"Both come from ",[496,525,526],{},"evlog\u002Ftoolkit"," and are the exact factories every built-in adapter uses.",[529,530,534,537,636],"prompt",{":actions":531,"description":532,"icon":533},"[\"copy\",\"cursor\",\"windsurf\"]","Build a custom evlog drain","i-lucide-code-2",[454,535,536],{},"Build a custom evlog drain that ships wide events to a backend without a built-in adapter.",[538,539,540,555,566,581,599,614,619,629],"ul",{},[541,542,543,544,547,548,550,551,554],"li",{},"For HTTP backends, use ",[496,545,546],{},"defineHttpDrain({ name, resolve, encode })"," from ",[496,549,526],{}," — never call ",[496,552,553],{},"fetch"," directly",[541,556,557,558,561,562,565],{},"For non-HTTP transports (queue, DB, native SDK, raw socket), use ",[496,559,560],{},"defineDrain({ name, send })"," and implement ",[496,563,564],{},"send(events)"," myself",[541,567,568,569,572,573,576,577,580],{},"Resolve config lazily inside ",[496,570,571],{},"resolve()"," via ",[496,574,575],{},"resolveAdapterConfig(namespace, fields, overrides)"," so users get the standard precedence (overrides → ",[496,578,579],{},"runtimeConfig.evlog.\u003Cns>"," → env)",[541,582,583,584,587,588,591,592,595,596],{},"Use the standardized field names: ",[496,585,586],{},"apiKey"," for bearer secrets, ",[496,589,590],{},"endpoint"," for the base URL, ",[496,593,594],{},"serviceName",", ",[496,597,598],{},"timeout",[541,600,601,602,605,606,609,610,613],{},"Encode batched events into the destination's wire format inside ",[496,603,604],{},"encode(events, config)"," — return ",[496,607,608],{},"{ url, headers, body }"," (or ",[496,611,612],{},"null"," to opt out of the batch)",[541,615,616,618],{},[496,617,507],{}," handles retries, timeouts, error isolation, batching, and identity headers — don't reimplement them",[541,620,621,622,625,626,628],{},"Wire the drain via ",[496,623,624],{},"defineEvlog({ drain: createMyDrain() })"," or my framework's middleware ",[496,627,460],{}," option",[541,630,631,632,635],{},"For production, wrap the result in ",[496,633,634],{},"createDrainPipeline"," for batching + retries",[454,637,638,639,644,645],{},"Docs: ",[463,640,641],{"href":641,"rel":642},"https:\u002F\u002Fwww.evlog.dev\u002Fextend\u002Fcustom-drains",[643],"nofollow","\nPipeline: ",[463,646,647],{"href":647,"rel":648},"https:\u002F\u002Fwww.evlog.dev\u002Fextend\u002Fdrain-pipeline",[643],[650,651,653,655],"h2",{"id":652},"definehttpdrain-the-http-recipe",[496,654,507],{}," (the HTTP recipe)",[454,657,658,659,661,662,664,665,668],{},"The recipe every built-in adapter follows. Two pure functions: ",[496,660,571],{}," returns the config (or ",[496,663,612],{}," to skip), ",[496,666,667],{},"encode()"," returns the HTTP request payload.",[670,671,677],"pre",{"className":672,"code":673,"filename":674,"language":675,"meta":676,"style":676},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","import {\n  defineHttpDrain,\n  resolveAdapterConfig,\n  type ConfigField,\n} from 'evlog\u002Ftoolkit'\n\ninterface MyServiceConfig {\n  apiKey: string\n  endpoint?: string\n  timeout?: number\n}\n\nconst FIELDS: ConfigField\u003CMyServiceConfig>[] = [\n  { key: 'apiKey', env: ['MYSERVICE_API_KEY'] },\n  { key: 'endpoint', env: ['MYSERVICE_ENDPOINT'] },\n  { key: 'timeout' },\n]\n\nexport function createMyServiceDrain(overrides?: Partial\u003CMyServiceConfig>) {\n  return defineHttpDrain\u003CMyServiceConfig>({\n    name: 'myservice',\n    resolve: async () => {\n      const cfg = await resolveAdapterConfig\u003CMyServiceConfig>('myservice', FIELDS, overrides)\n      if (!cfg.apiKey) {\n        console.error('[evlog\u002Fmyservice] Missing apiKey')\n        return null\n      }\n      return cfg as MyServiceConfig\n    },\n    encode: (events, cfg) => ({\n      url: `${cfg.endpoint ?? 'https:\u002F\u002Fapi.myservice.com'}\u002Fv1\u002Fingest`,\n      headers: {\n        'Content-Type': 'application\u002Fjson',\n        Authorization: `Bearer ${cfg.apiKey}`,\n      },\n      body: JSON.stringify(events),\n    }),\n  })\n}\n","lib\u002Fmy-drain.ts","typescript","",[496,678,679,692,702,710,721,739,746,759,772,783,794,800,805,836,878,912,930,936,941,975,995,1012,1031,1075,1100,1122,1131,1137,1151,1157,1183,1220,1230,1252,1280,1286,1310,1320,1328],{"__ignoreMap":676},[680,681,684,688],"span",{"class":682,"line":683},"line",1,[680,685,687],{"class":686},"s7zQu","import",[680,689,691],{"class":690},"sMK4o"," {\n",[680,693,695,699],{"class":682,"line":694},2,[680,696,698],{"class":697},"sTEyZ","  defineHttpDrain",[680,700,701],{"class":690},",\n",[680,703,705,708],{"class":682,"line":704},3,[680,706,707],{"class":697},"  resolveAdapterConfig",[680,709,701],{"class":690},[680,711,713,716,719],{"class":682,"line":712},4,[680,714,715],{"class":686},"  type",[680,717,718],{"class":697}," ConfigField",[680,720,701],{"class":690},[680,722,724,727,730,733,736],{"class":682,"line":723},5,[680,725,726],{"class":690},"}",[680,728,729],{"class":686}," from",[680,731,732],{"class":690}," '",[680,734,526],{"class":735},"sfazB",[680,737,738],{"class":690},"'\n",[680,740,742],{"class":682,"line":741},6,[680,743,745],{"emptyLinePlaceholder":744},true,"\n",[680,747,749,753,757],{"class":682,"line":748},7,[680,750,752],{"class":751},"spNyl","interface",[680,754,756],{"class":755},"sBMFI"," MyServiceConfig",[680,758,691],{"class":690},[680,760,762,766,769],{"class":682,"line":761},8,[680,763,765],{"class":764},"swJcz","  apiKey",[680,767,768],{"class":690},":",[680,770,771],{"class":755}," string\n",[680,773,775,778,781],{"class":682,"line":774},9,[680,776,777],{"class":764},"  endpoint",[680,779,780],{"class":690},"?:",[680,782,771],{"class":755},[680,784,786,789,791],{"class":682,"line":785},10,[680,787,788],{"class":764},"  timeout",[680,790,780],{"class":690},[680,792,793],{"class":755}," number\n",[680,795,797],{"class":682,"line":796},11,[680,798,799],{"class":690},"}\n",[680,801,803],{"class":682,"line":802},12,[680,804,745],{"emptyLinePlaceholder":744},[680,806,808,811,814,816,818,821,824,827,830,833],{"class":682,"line":807},13,[680,809,810],{"class":751},"const",[680,812,813],{"class":697}," FIELDS",[680,815,768],{"class":690},[680,817,718],{"class":755},[680,819,820],{"class":690},"\u003C",[680,822,823],{"class":755},"MyServiceConfig",[680,825,826],{"class":690},">",[680,828,829],{"class":697},"[] ",[680,831,832],{"class":690},"=",[680,834,835],{"class":697}," [\n",[680,837,839,842,845,847,849,851,854,857,860,862,865,867,870,872,875],{"class":682,"line":838},14,[680,840,841],{"class":690},"  {",[680,843,844],{"class":764}," key",[680,846,768],{"class":690},[680,848,732],{"class":690},[680,850,586],{"class":735},[680,852,853],{"class":690},"'",[680,855,856],{"class":690},",",[680,858,859],{"class":764}," env",[680,861,768],{"class":690},[680,863,864],{"class":697}," [",[680,866,853],{"class":690},[680,868,869],{"class":735},"MYSERVICE_API_KEY",[680,871,853],{"class":690},[680,873,874],{"class":697},"] ",[680,876,877],{"class":690},"},\n",[680,879,881,883,885,887,889,891,893,895,897,899,901,903,906,908,910],{"class":682,"line":880},15,[680,882,841],{"class":690},[680,884,844],{"class":764},[680,886,768],{"class":690},[680,888,732],{"class":690},[680,890,590],{"class":735},[680,892,853],{"class":690},[680,894,856],{"class":690},[680,896,859],{"class":764},[680,898,768],{"class":690},[680,900,864],{"class":697},[680,902,853],{"class":690},[680,904,905],{"class":735},"MYSERVICE_ENDPOINT",[680,907,853],{"class":690},[680,909,874],{"class":697},[680,911,877],{"class":690},[680,913,915,917,919,921,923,925,927],{"class":682,"line":914},16,[680,916,841],{"class":690},[680,918,844],{"class":764},[680,920,768],{"class":690},[680,922,732],{"class":690},[680,924,598],{"class":735},[680,926,853],{"class":690},[680,928,929],{"class":690}," },\n",[680,931,933],{"class":682,"line":932},17,[680,934,935],{"class":697},"]\n",[680,937,939],{"class":682,"line":938},18,[680,940,745],{"emptyLinePlaceholder":744},[680,942,944,947,950,954,957,961,963,966,968,970,973],{"class":682,"line":943},19,[680,945,946],{"class":686},"export",[680,948,949],{"class":751}," function",[680,951,953],{"class":952},"s2Zo4"," createMyServiceDrain",[680,955,956],{"class":690},"(",[680,958,960],{"class":959},"sHdIc","overrides",[680,962,780],{"class":690},[680,964,965],{"class":755}," Partial",[680,967,820],{"class":690},[680,969,823],{"class":755},[680,971,972],{"class":690},">)",[680,974,691],{"class":690},[680,976,978,981,984,986,988,990,992],{"class":682,"line":977},20,[680,979,980],{"class":686},"  return",[680,982,983],{"class":952}," defineHttpDrain",[680,985,820],{"class":690},[680,987,823],{"class":755},[680,989,826],{"class":690},[680,991,956],{"class":764},[680,993,994],{"class":690},"{\n",[680,996,998,1001,1003,1005,1008,1010],{"class":682,"line":997},21,[680,999,1000],{"class":764},"    name",[680,1002,768],{"class":690},[680,1004,732],{"class":690},[680,1006,1007],{"class":735},"myservice",[680,1009,853],{"class":690},[680,1011,701],{"class":690},[680,1013,1015,1018,1020,1023,1026,1029],{"class":682,"line":1014},22,[680,1016,1017],{"class":952},"    resolve",[680,1019,768],{"class":690},[680,1021,1022],{"class":751}," async",[680,1024,1025],{"class":690}," ()",[680,1027,1028],{"class":751}," =>",[680,1030,691],{"class":690},[680,1032,1034,1037,1040,1043,1046,1049,1051,1053,1055,1057,1059,1061,1063,1065,1067,1069,1072],{"class":682,"line":1033},23,[680,1035,1036],{"class":751},"      const",[680,1038,1039],{"class":697}," cfg",[680,1041,1042],{"class":690}," =",[680,1044,1045],{"class":686}," await",[680,1047,1048],{"class":952}," resolveAdapterConfig",[680,1050,820],{"class":690},[680,1052,823],{"class":755},[680,1054,826],{"class":690},[680,1056,956],{"class":764},[680,1058,853],{"class":690},[680,1060,1007],{"class":735},[680,1062,853],{"class":690},[680,1064,856],{"class":690},[680,1066,813],{"class":697},[680,1068,856],{"class":690},[680,1070,1071],{"class":697}," overrides",[680,1073,1074],{"class":764},")\n",[680,1076,1078,1081,1084,1087,1090,1093,1095,1098],{"class":682,"line":1077},24,[680,1079,1080],{"class":686},"      if",[680,1082,1083],{"class":764}," (",[680,1085,1086],{"class":690},"!",[680,1088,1089],{"class":697},"cfg",[680,1091,1092],{"class":690},".",[680,1094,586],{"class":697},[680,1096,1097],{"class":764},") ",[680,1099,994],{"class":690},[680,1101,1103,1106,1108,1111,1113,1115,1118,1120],{"class":682,"line":1102},25,[680,1104,1105],{"class":697},"        console",[680,1107,1092],{"class":690},[680,1109,1110],{"class":952},"error",[680,1112,956],{"class":764},[680,1114,853],{"class":690},[680,1116,1117],{"class":735},"[evlog\u002Fmyservice] Missing apiKey",[680,1119,853],{"class":690},[680,1121,1074],{"class":764},[680,1123,1125,1128],{"class":682,"line":1124},26,[680,1126,1127],{"class":686},"        return",[680,1129,1130],{"class":690}," null\n",[680,1132,1134],{"class":682,"line":1133},27,[680,1135,1136],{"class":690},"      }\n",[680,1138,1140,1143,1145,1148],{"class":682,"line":1139},28,[680,1141,1142],{"class":686},"      return",[680,1144,1039],{"class":697},[680,1146,1147],{"class":686}," as",[680,1149,1150],{"class":755}," MyServiceConfig\n",[680,1152,1154],{"class":682,"line":1153},29,[680,1155,1156],{"class":690},"    },\n",[680,1158,1160,1163,1165,1167,1170,1172,1174,1177,1179,1181],{"class":682,"line":1159},30,[680,1161,1162],{"class":952},"    encode",[680,1164,768],{"class":690},[680,1166,1083],{"class":690},[680,1168,1169],{"class":959},"events",[680,1171,856],{"class":690},[680,1173,1039],{"class":959},[680,1175,1176],{"class":690},")",[680,1178,1028],{"class":751},[680,1180,1083],{"class":764},[680,1182,994],{"class":690},[680,1184,1186,1189,1191,1194,1196,1198,1201,1204,1206,1209,1212,1215,1218],{"class":682,"line":1185},31,[680,1187,1188],{"class":764},"      url",[680,1190,768],{"class":690},[680,1192,1193],{"class":690}," `${",[680,1195,1089],{"class":697},[680,1197,1092],{"class":690},[680,1199,1200],{"class":697},"endpoint ",[680,1202,1203],{"class":690},"??",[680,1205,732],{"class":690},[680,1207,1208],{"class":735},"https:\u002F\u002Fapi.myservice.com",[680,1210,1211],{"class":690},"'}",[680,1213,1214],{"class":735},"\u002Fv1\u002Fingest",[680,1216,1217],{"class":690},"`",[680,1219,701],{"class":690},[680,1221,1223,1226,1228],{"class":682,"line":1222},32,[680,1224,1225],{"class":764},"      headers",[680,1227,768],{"class":690},[680,1229,691],{"class":690},[680,1231,1233,1236,1239,1241,1243,1245,1248,1250],{"class":682,"line":1232},33,[680,1234,1235],{"class":690},"        '",[680,1237,1238],{"class":764},"Content-Type",[680,1240,853],{"class":690},[680,1242,768],{"class":690},[680,1244,732],{"class":690},[680,1246,1247],{"class":735},"application\u002Fjson",[680,1249,853],{"class":690},[680,1251,701],{"class":690},[680,1253,1255,1258,1260,1263,1266,1269,1271,1273,1275,1278],{"class":682,"line":1254},34,[680,1256,1257],{"class":764},"        Authorization",[680,1259,768],{"class":690},[680,1261,1262],{"class":690}," `",[680,1264,1265],{"class":735},"Bearer ",[680,1267,1268],{"class":690},"${",[680,1270,1089],{"class":697},[680,1272,1092],{"class":690},[680,1274,586],{"class":697},[680,1276,1277],{"class":690},"}`",[680,1279,701],{"class":690},[680,1281,1283],{"class":682,"line":1282},35,[680,1284,1285],{"class":690},"      },\n",[680,1287,1289,1292,1294,1297,1299,1302,1304,1306,1308],{"class":682,"line":1288},36,[680,1290,1291],{"class":764},"      body",[680,1293,768],{"class":690},[680,1295,1296],{"class":697}," JSON",[680,1298,1092],{"class":690},[680,1300,1301],{"class":952},"stringify",[680,1303,956],{"class":764},[680,1305,1169],{"class":697},[680,1307,1176],{"class":764},[680,1309,701],{"class":690},[680,1311,1313,1316,1318],{"class":682,"line":1312},37,[680,1314,1315],{"class":690},"    }",[680,1317,1176],{"class":764},[680,1319,701],{"class":690},[680,1321,1323,1326],{"class":682,"line":1322},38,[680,1324,1325],{"class":690},"  }",[680,1327,1074],{"class":764},[680,1329,1331],{"class":682,"line":1330},39,[680,1332,799],{"class":690},[454,1334,1335,1336,1338,1339,1342,1343,1346],{},"That's it. ",[496,1337,507],{}," handles batching, retries (default 2), timeouts (default 5000ms), error isolation, and the identity headers (",[496,1340,1341],{},"User-Agent: evlog\u002F\u003Cversion>"," + ",[496,1344,1345],{},"X-Evlog-Source: \u003Cname>","). Your app pipeline keeps running even if your destination is down.",[1348,1349,1351],"h3",{"id":1350},"a-5-minute-example-internal-loki-drain","A 5-minute example — internal Loki drain",[454,1353,1354],{},"A complete working drain in 25 lines, with no external config helper:",[670,1356,1361],{"className":1357,"code":1358,"filename":1359,"language":1360,"meta":676,"style":676},"language-ts shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","import { defineHttpDrain } from 'evlog\u002Ftoolkit'\n\nexport function createLokiDrain(overrides?: { url?: string, token?: string }) {\n  return defineHttpDrain\u003C{ url: string, token: string }>({\n    name: 'loki',\n    resolve: () => ({\n      url: overrides?.url ?? process.env.LOKI_URL!,\n      token: overrides?.token ?? process.env.LOKI_TOKEN!,\n    }),\n    encode: (events, config) => ({\n      url: `${config.url}\u002Floki\u002Fapi\u002Fv1\u002Fpush`,\n      headers: {\n        'Content-Type': 'application\u002Fjson',\n        Authorization: `Bearer ${config.token}`,\n      },\n      body: JSON.stringify({\n        streams: events.map(e => ({\n          stream: { service: e.service, level: e.level },\n          values: [[String(Date.parse(e.timestamp) * 1e6), JSON.stringify(e)]],\n        })),\n      }),\n    }),\n  })\n}\n","lib\u002Floki-drain.ts","ts",[496,1362,1363,1383,1387,1426,1456,1471,1485,1518,1547,1555,1578,1602,1610,1628,1650,1654,1670,1696,1734,1794,1804,1813,1821,1827],{"__ignoreMap":676},[680,1364,1365,1367,1370,1372,1375,1377,1379,1381],{"class":682,"line":683},[680,1366,687],{"class":686},[680,1368,1369],{"class":690}," {",[680,1371,983],{"class":697},[680,1373,1374],{"class":690}," }",[680,1376,729],{"class":686},[680,1378,732],{"class":690},[680,1380,526],{"class":735},[680,1382,738],{"class":690},[680,1384,1385],{"class":682,"line":694},[680,1386,745],{"emptyLinePlaceholder":744},[680,1388,1389,1391,1393,1396,1398,1400,1402,1404,1407,1409,1412,1414,1417,1419,1421,1424],{"class":682,"line":704},[680,1390,946],{"class":686},[680,1392,949],{"class":751},[680,1394,1395],{"class":952}," createLokiDrain",[680,1397,956],{"class":690},[680,1399,960],{"class":959},[680,1401,780],{"class":690},[680,1403,1369],{"class":690},[680,1405,1406],{"class":764}," url",[680,1408,780],{"class":690},[680,1410,1411],{"class":755}," string",[680,1413,856],{"class":690},[680,1415,1416],{"class":764}," token",[680,1418,780],{"class":690},[680,1420,1411],{"class":755},[680,1422,1423],{"class":690}," })",[680,1425,691],{"class":690},[680,1427,1428,1430,1432,1435,1437,1439,1441,1443,1445,1447,1449,1452,1454],{"class":682,"line":712},[680,1429,980],{"class":686},[680,1431,983],{"class":952},[680,1433,1434],{"class":690},"\u003C{",[680,1436,1406],{"class":764},[680,1438,768],{"class":690},[680,1440,1411],{"class":755},[680,1442,856],{"class":690},[680,1444,1416],{"class":764},[680,1446,768],{"class":690},[680,1448,1411],{"class":755},[680,1450,1451],{"class":690}," }>",[680,1453,956],{"class":764},[680,1455,994],{"class":690},[680,1457,1458,1460,1462,1464,1467,1469],{"class":682,"line":723},[680,1459,1000],{"class":764},[680,1461,768],{"class":690},[680,1463,732],{"class":690},[680,1465,1466],{"class":735},"loki",[680,1468,853],{"class":690},[680,1470,701],{"class":690},[680,1472,1473,1475,1477,1479,1481,1483],{"class":682,"line":741},[680,1474,1017],{"class":952},[680,1476,768],{"class":690},[680,1478,1025],{"class":690},[680,1480,1028],{"class":751},[680,1482,1083],{"class":764},[680,1484,994],{"class":690},[680,1486,1487,1489,1491,1493,1496,1499,1502,1505,1507,1510,1512,1515],{"class":682,"line":748},[680,1488,1188],{"class":764},[680,1490,768],{"class":690},[680,1492,1071],{"class":697},[680,1494,1495],{"class":690},"?.",[680,1497,1498],{"class":697},"url",[680,1500,1501],{"class":690}," ??",[680,1503,1504],{"class":697}," 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1e6",[680,1776,1176],{"class":764},[680,1778,856],{"class":690},[680,1780,1296],{"class":697},[680,1782,1092],{"class":690},[680,1784,1301],{"class":952},[680,1786,956],{"class":764},[680,1788,1689],{"class":697},[680,1790,1791],{"class":764},")]]",[680,1793,701],{"class":690},[680,1795,1796,1799,1802],{"class":682,"line":977},[680,1797,1798],{"class":690},"        }",[680,1800,1801],{"class":764},"))",[680,1803,701],{"class":690},[680,1805,1806,1809,1811],{"class":682,"line":997},[680,1807,1808],{"class":690},"      }",[680,1810,1176],{"class":764},[680,1812,701],{"class":690},[680,1814,1815,1817,1819],{"class":682,"line":1014},[680,1816,1315],{"class":690},[680,1818,1176],{"class":764},[680,1820,701],{"class":690},[680,1822,1823,1825],{"class":682,"line":1033},[680,1824,1325],{"class":690},[680,1826,1074],{"class":764},[680,1828,1829],{"class":682,"line":1077},[680,1830,799],{"class":690},[650,1832,1834],{"id":1833},"standardized-config-priority","Standardized config priority",[454,1836,1837,1839],{},[496,1838,575],{}," walks the standard chain so users get the same configuration UX as built-in adapters:",[1841,1842,1843,1849,1855,1861],"ol",{},[541,1844,1845,1846,1848],{},"Explicit ",[496,1847,960],{}," passed to your factory",[541,1850,1851,1854],{},[496,1852,1853],{},"runtimeConfig.evlog.\u003Cnamespace>"," (Nuxt\u002FNitro)",[541,1856,1857,1860],{},[496,1858,1859],{},"runtimeConfig.\u003Cnamespace>"," (legacy Nuxt\u002FNitro)",[541,1862,1863,1866,1867,1870,1871,1874,1875,1877,1878,1176],{},[496,1864,1865],{},"\u003CNS>_\u003CFIELD>"," env vars (list ",[496,1868,1869],{},"NUXT_\u003CNS>_\u003CFIELD>"," in ",[496,1872,1873],{},"ConfigField.env"," for silent Nuxt compat; show only ",[496,1876,1865],{}," in error messages via ",[496,1879,1880],{},"formatPublicEnvKeys",[454,1882,1883,1884,595,1886,595,1888,595,1890,1892,1893,1895,1896,1898,1899,1902,1903,1906,1907,1910],{},"Field names should follow the project conventions: ",[496,1885,586],{},[496,1887,590],{},[496,1889,594],{},[496,1891,598],{},". If you're renaming an existing field (e.g. ",[496,1894,1531],{}," → ",[496,1897,586],{},"), keep both as ",[496,1900,1901],{},"ConfigField"," entries for one major version — see ",[496,1904,1905],{},"axiom.ts"," and ",[496,1908,1909],{},"better-stack.ts"," for the deprecation pattern.",[650,1912,1914],{"id":1913},"wiring-the-drain-into-your-framework","Wiring the drain into your framework",[454,1916,1917,1918,1921],{},"Once ",[496,1919,1920],{},"createMyServiceDrain()"," returns the drain, wire it like any other:",[1923,1924,1925,2038,2164,2222,2259,2290],"code-group",{},[670,1926,1929],{"className":672,"code":1927,"filename":1928,"language":675,"meta":676,"style":676},"\u002F\u002F server\u002Fplugins\u002Fevlog-drain.ts\nimport { createMyServiceDrain } from '~\u002Fserver\u002Futils\u002Fmy-drain'\n\nconst drain = createMyServiceDrain()\n\nexport default defineNitroPlugin((nitroApp) => {\n  nitroApp.hooks.hook('evlog:drain', drain)\n})\n","Nuxt \u002F Nitro",[496,1930,1931,1937,1956,1960,1974,1978,2001,2032],{"__ignoreMap":676},[680,1932,1933],{"class":682,"line":683},[680,1934,1936],{"class":1935},"sHwdD","\u002F\u002F server\u002Fplugins\u002Fevlog-drain.ts\n",[680,1938,1939,1941,1943,1945,1947,1949,1951,1954],{"class":682,"line":694},[680,1940,687],{"class":686},[680,1942,1369],{"class":690},[680,1944,953],{"class":697},[680,1946,1374],{"class":690},[680,1948,729],{"class":686},[680,1950,732],{"class":690},[680,1952,1953],{"class":735},"~\u002Fserver\u002Futils\u002Fmy-drain",[680,1955,738],{"class":690},[680,1957,1958],{"class":682,"line":704},[680,1959,745],{"emptyLinePlaceholder":744},[680,1961,1962,1964,1967,1969,1971],{"class":682,"line":712},[680,1963,810],{"class":751},[680,1965,1966],{"class":697}," drain ",[680,1968,832],{"class":690},[680,1970,953],{"class":952},[680,1972,1973],{"class":697},"()\n",[680,1975,1976],{"class":682,"line":723},[680,1977,745],{"emptyLinePlaceholder":744},[680,1979,1980,1982,1985,1988,1990,1992,1995,1997,1999],{"class":682,"line":741},[680,1981,946],{"class":686},[680,1983,1984],{"class":686}," default",[680,1986,1987],{"class":952}," defineNitroPlugin",[680,1989,956],{"class":697},[680,1991,956],{"class":690},[680,1993,1994],{"class":959},"nitroApp",[680,1996,1176],{"class":690},[680,1998,1028],{"class":751},[680,2000,691],{"class":690},[680,2002,2003,2006,2008,2011,2013,2016,2018,2020,2023,2025,2027,2030],{"class":682,"line":748},[680,2004,2005],{"class":697},"  nitroApp",[680,2007,1092],{"class":690},[680,2009,2010],{"class":697},"hooks",[680,2012,1092],{"class":690},[680,2014,2015],{"class":952},"hook",[680,2017,956],{"class":764},[680,2019,853],{"class":690},[680,2021,2022],{"class":735},"evlog:drain",[680,2024,853],{"class":690},[680,2026,856],{"class":690},[680,2028,2029],{"class":697}," drain",[680,2031,1074],{"class":764},[680,2033,2034,2036],{"class":682,"line":761},[680,2035,726],{"class":690},[680,2037,1074],{"class":697},[670,2039,2041],{"className":672,"code":2040,"filename":172,"language":675,"meta":676,"style":676},"\u002F\u002F lib\u002Fevlog.ts\nimport { createEvlog } from 'evlog\u002Fnext'\nimport { createMyServiceDrain } from '.\u002Fmy-drain'\n\nexport const { withEvlog, useLogger, log, createError } = createEvlog({\n  service: 'my-app',\n  drain: createMyServiceDrain(),\n})\n",[496,2042,2043,2048,2068,2087,2091,2128,2144,2158],{"__ignoreMap":676},[680,2044,2045],{"class":682,"line":683},[680,2046,2047],{"class":1935},"\u002F\u002F lib\u002Fevlog.ts\n",[680,2049,2050,2052,2054,2057,2059,2061,2063,2066],{"class":682,"line":694},[680,2051,687],{"class":686},[680,2053,1369],{"class":690},[680,2055,2056],{"class":697}," createEvlog",[680,2058,1374],{"class":690},[680,2060,729],{"class":686},[680,2062,732],{"class":690},[680,2064,2065],{"class":735},"evlog\u002Fnext",[680,2067,738],{"class":690},[680,2069,2070,2072,2074,2076,2078,2080,2082,2085],{"class":682,"line":704},[680,2071,687],{"class":686},[680,2073,1369],{"class":690},[680,2075,953],{"class":697},[680,2077,1374],{"class":690},[680,2079,729],{"class":686},[680,2081,732],{"class":690},[680,2083,2084],{"class":735},".\u002Fmy-drain",[680,2086,738],{"class":690},[680,2088,2089],{"class":682,"line":712},[680,2090,745],{"emptyLinePlaceholder":744},[680,2092,2093,2095,2098,2100,2103,2105,2108,2110,2113,2115,2118,2120,2122,2124,2126],{"class":682,"line":723},[680,2094,946],{"class":686},[680,2096,2097],{"class":751}," const",[680,2099,1369],{"class":690},[680,2101,2102],{"class":697}," withEvlog",[680,2104,856],{"class":690},[680,2106,2107],{"class":697}," useLogger",[680,2109,856],{"class":690},[680,2111,2112],{"class":697}," log",[680,2114,856],{"class":690},[680,2116,2117],{"class":697}," createError ",[680,2119,726],{"class":690},[680,2121,1042],{"class":690},[680,2123,2056],{"class":952},[680,2125,956],{"class":697},[680,2127,994],{"class":690},[680,2129,2130,2133,2135,2137,2140,2142],{"class":682,"line":741},[680,2131,2132],{"class":764},"  service",[680,2134,768],{"class":690},[680,2136,732],{"class":690},[680,2138,2139],{"class":735},"my-app",[680,2141,853],{"class":690},[680,2143,701],{"class":690},[680,2145,2146,2149,2151,2153,2156],{"class":682,"line":748},[680,2147,2148],{"class":764},"  drain",[680,2150,768],{"class":690},[680,2152,953],{"class":952},[680,2154,2155],{"class":697},"()",[680,2157,701],{"class":690},[680,2159,2160,2162],{"class":682,"line":761},[680,2161,726],{"class":690},[680,2163,1074],{"class":697},[670,2165,2168],{"className":672,"code":2166,"filename":2167,"language":675,"meta":676,"style":676},"import { createMyServiceDrain } from '.\u002Fmy-drain'\napp.use(evlog({ drain: createMyServiceDrain() }))\n","Hono \u002F Express \u002F Elysia",[496,2169,2170,2188],{"__ignoreMap":676},[680,2171,2172,2174,2176,2178,2180,2182,2184,2186],{"class":682,"line":683},[680,2173,687],{"class":686},[680,2175,1369],{"class":690},[680,2177,953],{"class":697},[680,2179,1374],{"class":690},[680,2181,729],{"class":686},[680,2183,732],{"class":690},[680,2185,2084],{"class":735},[680,2187,738],{"class":690},[680,2189,2190,2193,2195,2198,2200,2203,2205,2208,2210,2212,2214,2217,2219],{"class":682,"line":694},[680,2191,2192],{"class":697},"app",[680,2194,1092],{"class":690},[680,2196,2197],{"class":952},"use",[680,2199,956],{"class":697},[680,2201,2202],{"class":952},"evlog",[680,2204,956],{"class":697},[680,2206,2207],{"class":690},"{",[680,2209,2029],{"class":764},[680,2211,768],{"class":690},[680,2213,953],{"class":952},[680,2215,2216],{"class":697},"() ",[680,2218,726],{"class":690},[680,2220,2221],{"class":697},"))\n",[670,2223,2225],{"className":672,"code":2224,"filename":207,"language":675,"meta":676,"style":676},"await app.register(evlog, { drain: createMyServiceDrain() })\n",[496,2226,2227],{"__ignoreMap":676},[680,2228,2229,2232,2235,2237,2240,2243,2245,2247,2249,2251,2253,2255,2257],{"class":682,"line":683},[680,2230,2231],{"class":686},"await",[680,2233,2234],{"class":697}," app",[680,2236,1092],{"class":690},[680,2238,2239],{"class":952},"register",[680,2241,2242],{"class":697},"(evlog",[680,2244,856],{"class":690},[680,2246,1369],{"class":690},[680,2248,2029],{"class":764},[680,2250,768],{"class":690},[680,2252,953],{"class":952},[680,2254,2216],{"class":697},[680,2256,726],{"class":690},[680,2258,1074],{"class":697},[670,2260,2262],{"className":672,"code":2261,"filename":192,"language":675,"meta":676,"style":676},"EvlogModule.forRoot({ drain: createMyServiceDrain() })\n",[496,2263,2264],{"__ignoreMap":676},[680,2265,2266,2269,2271,2274,2276,2278,2280,2282,2284,2286,2288],{"class":682,"line":683},[680,2267,2268],{"class":697},"EvlogModule",[680,2270,1092],{"class":690},[680,2272,2273],{"class":952},"forRoot",[680,2275,956],{"class":697},[680,2277,2207],{"class":690},[680,2279,2029],{"class":764},[680,2281,768],{"class":690},[680,2283,953],{"class":952},[680,2285,2216],{"class":697},[680,2287,726],{"class":690},[680,2289,1074],{"class":697},[670,2291,2293],{"className":672,"code":2292,"filename":227,"language":675,"meta":676,"style":676},"import { initLogger } from 'evlog'\nimport { createMyServiceDrain } from '.\u002Fmy-drain'\n\ninitLogger({ drain: createMyServiceDrain() })\n",[496,2294,2295,2314,2332,2336],{"__ignoreMap":676},[680,2296,2297,2299,2301,2304,2306,2308,2310,2312],{"class":682,"line":683},[680,2298,687],{"class":686},[680,2300,1369],{"class":690},[680,2302,2303],{"class":697}," initLogger",[680,2305,1374],{"class":690},[680,2307,729],{"class":686},[680,2309,732],{"class":690},[680,2311,2202],{"class":735},[680,2313,738],{"class":690},[680,2315,2316,2318,2320,2322,2324,2326,2328,2330],{"class":682,"line":694},[680,2317,687],{"class":686},[680,2319,1369],{"class":690},[680,2321,953],{"class":697},[680,2323,1374],{"class":690},[680,2325,729],{"class":686},[680,2327,732],{"class":690},[680,2329,2084],{"class":735},[680,2331,738],{"class":690},[680,2333,2334],{"class":682,"line":704},[680,2335,745],{"emptyLinePlaceholder":744},[680,2337,2338,2341,2343,2345,2347,2349,2351,2353,2355],{"class":682,"line":712},[680,2339,2340],{"class":952},"initLogger",[680,2342,956],{"class":697},[680,2344,2207],{"class":690},[680,2346,2029],{"class":764},[680,2348,768],{"class":690},[680,2350,953],{"class":952},[680,2352,2216],{"class":697},[680,2354,726],{"class":690},[680,2356,1074],{"class":697},[454,2358,2359,2360,2364],{},"For production, wrap it once in ",[463,2361,2362],{"href":413},[496,2363,634],{}," so events are batched and retried.",[650,2366,2368],{"id":2367},"filtering-and-transforming-events","Filtering and transforming events",[454,2370,2371,2373,2374,2377,2378,2380],{},[496,2372,667],{}," receives the full batch of ",[496,2375,2376],{},"WideEvent[]"," plus the resolved config. Filter or transform inline — returning ",[496,2379,612],{}," is a clean opt-out for that batch:",[670,2382,2384],{"className":672,"code":2383,"language":675,"meta":676,"style":676},"encode: (events, cfg) => {\n  const filtered = events.filter(e => e.level === 'error' && e.path !== '\u002Fhealth')\n  if (filtered.length === 0) return null\n\n  const payload = filtered.map(e => ({\n    ts: new Date(e.timestamp).getTime(),\n    severity: e.level.toUpperCase(),\n    attributes: { method: e.method, path: e.path, status: e.status, duration: e.duration },\n  }))\n\n  return {\n    url: `${cfg.endpoint}\u002Fv1\u002Fpush`,\n    headers: { 'Content-Type': 'application\u002Fjson' },\n    body: JSON.stringify(payload),\n  }\n}\n",[496,2385,2386,2407,2467,2494,2498,2523,2555,2577,2641,2647,2651,2657,2681,2706,2728,2733],{"__ignoreMap":676},[680,2387,2388,2391,2393,2395,2397,2399,2401,2403,2405],{"class":682,"line":683},[680,2389,2390],{"class":755},"encode",[680,2392,768],{"class":690},[680,2394,1083],{"class":690},[680,2396,1169],{"class":959},[680,2398,856],{"class":690},[680,2400,1039],{"class":959},[680,2402,1176],{"class":690},[680,2404,1028],{"class":751},[680,2406,691],{"class":690},[680,2408,2409,2412,2415,2417,2419,2421,2424,2426,2428,2430,2432,2434,2436,2439,2441,2443,2445,2448,2450,2452,2455,2458,2460,2463,2465],{"class":682,"line":694},[680,2410,2411],{"class":751},"  const",[680,2413,2414],{"class":697}," filtered",[680,2416,1042],{"class":690},[680,2418,1679],{"class":697},[680,2420,1092],{"class":690},[680,2422,2423],{"class":952},"filter",[680,2425,956],{"class":764},[680,2427,1689],{"class":959},[680,2429,1028],{"class":751},[680,2431,1712],{"class":697},[680,2433,1092],{"class":690},[680,2435,1731],{"class":697},[680,2437,2438],{"class":690}," ===",[680,2440,732],{"class":690},[680,2442,1110],{"class":735},[680,2444,853],{"class":690},[680,2446,2447],{"class":690}," &&",[680,2449,1712],{"class":697},[680,2451,1092],{"class":690},[680,2453,2454],{"class":697},"path",[680,2456,2457],{"class":690}," !==",[680,2459,732],{"class":690},[680,2461,2462],{"class":735},"\u002Fhealth",[680,2464,853],{"class":690},[680,2466,1074],{"class":764},[680,2468,2469,2472,2474,2477,2479,2482,2484,2487,2489,2492],{"class":682,"line":704},[680,2470,2471],{"class":686},"  if",[680,2473,1083],{"class":764},[680,2475,2476],{"class":697},"filtered",[680,2478,1092],{"class":690},[680,2480,2481],{"class":697},"length",[680,2483,2438],{"class":690},[680,2485,2486],{"class":1773}," 0",[680,2488,1097],{"class":764},[680,2490,2491],{"class":686},"return",[680,2493,1130],{"class":690},[680,2495,2496],{"class":682,"line":712},[680,2497,745],{"emptyLinePlaceholder":744},[680,2499,2500,2502,2505,2507,2509,2511,2513,2515,2517,2519,2521],{"class":682,"line":723},[680,2501,2411],{"class":751},[680,2503,2504],{"class":697}," payload",[680,2506,1042],{"class":690},[680,2508,2414],{"class":697},[680,2510,1092],{"class":690},[680,2512,1684],{"class":952},[680,2514,956],{"class":764},[680,2516,1689],{"class":959},[680,2518,1028],{"class":751},[680,2520,1083],{"class":764},[680,2522,994],{"class":690},[680,2524,2525,2528,2530,2533,2536,2538,2540,2542,2544,2546,2548,2551,2553],{"class":682,"line":741},[680,2526,2527],{"class":764},"    ts",[680,2529,768],{"class":690},[680,2531,2532],{"class":690}," new",[680,2534,2535],{"class":952}," Date",[680,2537,956],{"class":764},[680,2539,1689],{"class":697},[680,2541,1092],{"class":690},[680,2543,1765],{"class":697},[680,2545,1176],{"class":764},[680,2547,1092],{"class":690},[680,2549,2550],{"class":952},"getTime",[680,2552,2155],{"class":764},[680,2554,701],{"class":690},[680,2556,2557,2560,2562,2564,2566,2568,2570,2573,2575],{"class":682,"line":748},[680,2558,2559],{"class":764},"    severity",[680,2561,768],{"class":690},[680,2563,1712],{"class":697},[680,2565,1092],{"class":690},[680,2567,1731],{"class":697},[680,2569,1092],{"class":690},[680,2571,2572],{"class":952},"toUpperCase",[680,2574,2155],{"class":764},[680,2576,701],{"class":690},[680,2578,2579,2582,2584,2586,2589,2591,2593,2595,2598,2600,2603,2605,2607,2609,2611,2613,2616,2618,2620,2622,2625,2627,2630,2632,2634,2636,2639],{"class":682,"line":761},[680,2580,2581],{"class":764},"    attributes",[680,2583,768],{"class":690},[680,2585,1369],{"class":690},[680,2587,2588],{"class":764}," method",[680,2590,768],{"class":690},[680,2592,1712],{"class":697},[680,2594,1092],{"class":690},[680,2596,2597],{"class":697},"method",[680,2599,856],{"class":690},[680,2601,2602],{"class":764}," path",[680,2604,768],{"class":690},[680,2606,1712],{"class":697},[680,2608,1092],{"class":690},[680,2610,2454],{"class":697},[680,2612,856],{"class":690},[680,2614,2615],{"class":764}," status",[680,2617,768],{"class":690},[680,2619,1712],{"class":697},[680,2621,1092],{"class":690},[680,2623,2624],{"class":697},"status",[680,2626,856],{"class":690},[680,2628,2629],{"class":764}," duration",[680,2631,768],{"class":690},[680,2633,1712],{"class":697},[680,2635,1092],{"class":690},[680,2637,2638],{"class":697},"duration",[680,2640,929],{"class":690},[680,2642,2643,2645],{"class":682,"line":774},[680,2644,1325],{"class":690},[680,2646,2221],{"class":764},[680,2648,2649],{"class":682,"line":785},[680,2650,745],{"emptyLinePlaceholder":744},[680,2652,2653,2655],{"class":682,"line":796},[680,2654,980],{"class":686},[680,2656,691],{"class":690},[680,2658,2659,2662,2664,2666,2668,2670,2672,2674,2677,2679],{"class":682,"line":802},[680,2660,2661],{"class":764},"    url",[680,2663,768],{"class":690},[680,2665,1193],{"class":690},[680,2667,1089],{"class":697},[680,2669,1092],{"class":690},[680,2671,590],{"class":697},[680,2673,726],{"class":690},[680,2675,2676],{"class":735},"\u002Fv1\u002Fpush",[680,2678,1217],{"class":690},[680,2680,701],{"class":690},[680,2682,2683,2686,2688,2690,2692,2694,2696,2698,2700,2702,2704],{"class":682,"line":807},[680,2684,2685],{"class":764},"    headers",[680,2687,768],{"class":690},[680,2689,1369],{"class":690},[680,2691,732],{"class":690},[680,2693,1238],{"class":764},[680,2695,853],{"class":690},[680,2697,768],{"class":690},[680,2699,732],{"class":690},[680,2701,1247],{"class":735},[680,2703,853],{"class":690},[680,2705,929],{"class":690},[680,2707,2708,2711,2713,2715,2717,2719,2721,2724,2726],{"class":682,"line":838},[680,2709,2710],{"class":764},"    body",[680,2712,768],{"class":690},[680,2714,1296],{"class":697},[680,2716,1092],{"class":690},[680,2718,1301],{"class":952},[680,2720,956],{"class":764},[680,2722,2723],{"class":697},"payload",[680,2725,1176],{"class":764},[680,2727,701],{"class":690},[680,2729,2730],{"class":682,"line":880},[680,2731,2732],{"class":690},"  }\n",[680,2734,2735],{"class":682,"line":914},[680,2736,799],{"class":690},[650,2738,2740,2742],{"id":2739},"definedrain-non-http-transports",[496,2741,520],{}," (non-HTTP transports)",[454,2744,2745,2746,2748],{},"If your destination requires gRPC, a vendor SDK, a queue client, a WebSocket, or a raw socket, drop one level lower with ",[496,2747,520],{},". You own the transport; the toolkit still gives you config resolution, error isolation, and a consistent shape.",[670,2750,2752],{"className":672,"code":2751,"language":675,"meta":676,"style":676},"import { defineDrain } from 'evlog\u002Ftoolkit'\n\nexport const createCustomTransportDrain = () =>\n  defineDrain\u003C{ apiKey: string }>({\n    name: 'custom',\n    resolve: async () => ({ apiKey: process.env.MY_KEY! }),\n    send: async (events, cfg) => {\n      await myVendorSdk.publish(events, { token: cfg.apiKey })\n    },\n  })\n",[496,2753,2754,2773,2777,2793,2813,2828,2867,2890,2925,2929],{"__ignoreMap":676},[680,2755,2756,2758,2760,2763,2765,2767,2769,2771],{"class":682,"line":683},[680,2757,687],{"class":686},[680,2759,1369],{"class":690},[680,2761,2762],{"class":697}," defineDrain",[680,2764,1374],{"class":690},[680,2766,729],{"class":686},[680,2768,732],{"class":690},[680,2770,526],{"class":735},[680,2772,738],{"class":690},[680,2774,2775],{"class":682,"line":694},[680,2776,745],{"emptyLinePlaceholder":744},[680,2778,2779,2781,2783,2786,2788,2790],{"class":682,"line":704},[680,2780,946],{"class":686},[680,2782,2097],{"class":751},[680,2784,2785],{"class":697}," createCustomTransportDrain ",[680,2787,832],{"class":690},[680,2789,1025],{"class":690},[680,2791,2792],{"class":751}," =>\n",[680,2794,2795,2798,2800,2803,2805,2807,2809,2811],{"class":682,"line":712},[680,2796,2797],{"class":952},"  defineDrain",[680,2799,1434],{"class":690},[680,2801,2802],{"class":764}," apiKey",[680,2804,768],{"class":690},[680,2806,1411],{"class":755},[680,2808,1451],{"class":690},[680,2810,956],{"class":697},[680,2812,994],{"class":690},[680,2814,2815,2817,2819,2821,2824,2826],{"class":682,"line":723},[680,2816,1000],{"class":764},[680,2818,768],{"class":690},[680,2820,732],{"class":690},[680,2822,2823],{"class":735},"custom",[680,2825,853],{"class":690},[680,2827,701],{"class":690},[680,2829,2830,2832,2834,2836,2838,2840,2842,2844,2846,2848,2850,2852,2854,2856,2859,2861,2863,2865],{"class":682,"line":741},[680,2831,1017],{"class":952},[680,2833,768],{"class":690},[680,2835,1022],{"class":751},[680,2837,1025],{"class":690},[680,2839,1028],{"class":751},[680,2841,1083],{"class":697},[680,2843,2207],{"class":690},[680,2845,2802],{"class":764},[680,2847,768],{"class":690},[680,2849,1504],{"class":697},[680,2851,1092],{"class":690},[680,2853,1509],{"class":697},[680,2855,1092],{"class":690},[680,2857,2858],{"class":697},"MY_KEY",[680,2860,1086],{"class":690},[680,2862,1374],{"class":690},[680,2864,1176],{"class":697},[680,2866,701],{"class":690},[680,2868,2869,2872,2874,2876,2878,2880,2882,2884,2886,2888],{"class":682,"line":748},[680,2870,2871],{"class":952},"    send",[680,2873,768],{"class":690},[680,2875,1022],{"class":751},[680,2877,1083],{"class":690},[680,2879,1169],{"class":959},[680,2881,856],{"class":690},[680,2883,1039],{"class":959},[680,2885,1176],{"class":690},[680,2887,1028],{"class":751},[680,2889,691],{"class":690},[680,2891,2892,2895,2898,2900,2903,2905,2907,2909,2911,2913,2915,2917,2919,2921,2923],{"class":682,"line":761},[680,2893,2894],{"class":686},"      await",[680,2896,2897],{"class":697}," myVendorSdk",[680,2899,1092],{"class":690},[680,2901,2902],{"class":952},"publish",[680,2904,956],{"class":764},[680,2906,1169],{"class":697},[680,2908,856],{"class":690},[680,2910,1369],{"class":690},[680,2912,1416],{"class":764},[680,2914,768],{"class":690},[680,2916,1039],{"class":697},[680,2918,1092],{"class":690},[680,2920,586],{"class":697},[680,2922,1374],{"class":690},[680,2924,1074],{"class":764},[680,2926,2927],{"class":682,"line":774},[680,2928,1156],{"class":690},[680,2930,2931,2933],{"class":682,"line":785},[680,2932,1325],{"class":690},[680,2934,1074],{"class":697},[454,2936,2937,2938,2940,2941,2943,2944,2947,2948,2951],{},"When you fall back to ",[496,2939,520],{},", follow the same rules manually that ",[496,2942,507],{}," enforces: wrap the transport in ",[496,2945,2946],{},"try\u002Fcatch",", log with ",[496,2949,2950],{},"console.error('[evlog\u002F\u003Cname>] …')",", and never re-throw.",[650,2953,2955],{"id":2954},"draincontext-reference","DrainContext reference",[454,2957,2958,2959,2961,2962,2965],{},"When evlog calls your drain through ",[496,2960,2022],{},", it passes a ",[496,2963,2964],{},"DrainContext"," per event:",[670,2967,2970],{"className":672,"code":2968,"filename":2969,"language":675,"meta":676,"style":676},"interface DrainContext {\n  \u002F** The complete wide event with all accumulated context *\u002F\n  event: WideEvent\n\n  \u002F** Request metadata *\u002F\n  request?: {\n    method: string\n    path: string\n    requestId: string\n  }\n\n  \u002F** Safe HTTP headers (sensitive headers filtered) *\u002F\n  headers?: Record\u003Cstring, string>\n}\n\ninterface WideEvent {\n  timestamp: string\n  level: 'debug' | 'info' | 'warn' | 'error'\n  service: string\n  environment?: string\n  version?: string\n  region?: string\n  commitHash?: string\n  requestId?: string\n  \u002F\u002F ... plus all fields added via log.set()\n  [key: string]: unknown\n}\n","types.ts",[496,2971,2972,2981,2986,2996,3000,3005,3014,3023,3032,3041,3045,3049,3054,3076,3080,3084,3093,3102,3143,3151,3160,3169,3178,3187,3196,3201,3221],{"__ignoreMap":676},[680,2973,2974,2976,2979],{"class":682,"line":683},[680,2975,752],{"class":751},[680,2977,2978],{"class":755}," DrainContext",[680,2980,691],{"class":690},[680,2982,2983],{"class":682,"line":694},[680,2984,2985],{"class":1935},"  \u002F** The complete wide event with all accumulated context *\u002F\n",[680,2987,2988,2991,2993],{"class":682,"line":704},[680,2989,2990],{"class":764},"  event",[680,2992,768],{"class":690},[680,2994,2995],{"class":755}," WideEvent\n",[680,2997,2998],{"class":682,"line":712},[680,2999,745],{"emptyLinePlaceholder":744},[680,3001,3002],{"class":682,"line":723},[680,3003,3004],{"class":1935},"  \u002F** Request metadata *\u002F\n",[680,3006,3007,3010,3012],{"class":682,"line":741},[680,3008,3009],{"class":764},"  request",[680,3011,780],{"class":690},[680,3013,691],{"class":690},[680,3015,3016,3019,3021],{"class":682,"line":748},[680,3017,3018],{"class":764},"    method",[680,3020,768],{"class":690},[680,3022,771],{"class":755},[680,3024,3025,3028,3030],{"class":682,"line":761},[680,3026,3027],{"class":764},"    path",[680,3029,768],{"class":690},[680,3031,771],{"class":755},[680,3033,3034,3037,3039],{"class":682,"line":774},[680,3035,3036],{"class":764},"    requestId",[680,3038,768],{"class":690},[680,3040,771],{"class":755},[680,3042,3043],{"class":682,"line":785},[680,3044,2732],{"class":690},[680,3046,3047],{"class":682,"line":796},[680,3048,745],{"emptyLinePlaceholder":744},[680,3050,3051],{"class":682,"line":802},[680,3052,3053],{"class":1935},"  \u002F** Safe HTTP headers (sensitive headers filtered) *\u002F\n",[680,3055,3056,3059,3061,3064,3066,3069,3071,3073],{"class":682,"line":807},[680,3057,3058],{"class":764},"  headers",[680,3060,780],{"class":690},[680,3062,3063],{"class":755}," Record",[680,3065,820],{"class":690},[680,3067,3068],{"class":755},"string",[680,3070,856],{"class":690},[680,3072,1411],{"class":755},[680,3074,3075],{"class":690},">\n",[680,3077,3078],{"class":682,"line":838},[680,3079,799],{"class":690},[680,3081,3082],{"class":682,"line":880},[680,3083,745],{"emptyLinePlaceholder":744},[680,3085,3086,3088,3091],{"class":682,"line":914},[680,3087,752],{"class":751},[680,3089,3090],{"class":755}," WideEvent",[680,3092,691],{"class":690},[680,3094,3095,3098,3100],{"class":682,"line":932},[680,3096,3097],{"class":764},"  timestamp",[680,3099,768],{"class":690},[680,3101,771],{"class":755},[680,3103,3104,3107,3109,3111,3114,3116,3119,3121,3124,3126,3128,3130,3133,3135,3137,3139,3141],{"class":682,"line":938},[680,3105,3106],{"class":764},"  level",[680,3108,768],{"class":690},[680,3110,732],{"class":690},[680,3112,3113],{"class":735},"debug",[680,3115,853],{"class":690},[680,3117,3118],{"class":690}," |",[680,3120,732],{"class":690},[680,3122,3123],{"class":735},"info",[680,3125,853],{"class":690},[680,3127,3118],{"class":690},[680,3129,732],{"class":690},[680,3131,3132],{"class":735},"warn",[680,3134,853],{"class":690},[680,3136,3118],{"class":690},[680,3138,732],{"class":690},[680,3140,1110],{"class":735},[680,3142,738],{"class":690},[680,3144,3145,3147,3149],{"class":682,"line":943},[680,3146,2132],{"class":764},[680,3148,768],{"class":690},[680,3150,771],{"class":755},[680,3152,3153,3156,3158],{"class":682,"line":977},[680,3154,3155],{"class":764},"  environment",[680,3157,780],{"class":690},[680,3159,771],{"class":755},[680,3161,3162,3165,3167],{"class":682,"line":997},[680,3163,3164],{"class":764},"  version",[680,3166,780],{"class":690},[680,3168,771],{"class":755},[680,3170,3171,3174,3176],{"class":682,"line":1014},[680,3172,3173],{"class":764},"  region",[680,3175,780],{"class":690},[680,3177,771],{"class":755},[680,3179,3180,3183,3185],{"class":682,"line":1033},[680,3181,3182],{"class":764},"  commitHash",[680,3184,780],{"class":690},[680,3186,771],{"class":755},[680,3188,3189,3192,3194],{"class":682,"line":1077},[680,3190,3191],{"class":764},"  requestId",[680,3193,780],{"class":690},[680,3195,771],{"class":755},[680,3197,3198],{"class":682,"line":1102},[680,3199,3200],{"class":1935},"  \u002F\u002F ... plus all fields added via log.set()\n",[680,3202,3203,3206,3209,3211,3213,3216,3218],{"class":682,"line":1124},[680,3204,3205],{"class":697},"  [",[680,3207,3208],{"class":959},"key",[680,3210,768],{"class":690},[680,3212,1411],{"class":755},[680,3214,3215],{"class":697},"]",[680,3217,768],{"class":690},[680,3219,3220],{"class":755}," unknown\n",[680,3222,3223],{"class":682,"line":1133},[680,3224,799],{"class":690},[454,3226,3227,3228,3230,3231,3234,3235,3237,3238,3241],{},"In the batched form your ",[496,3229,667],{}," \u002F ",[496,3232,3233],{},"send()"," receives, you get ",[496,3236,2376],{}," directly (the toolkit unwraps ",[496,3239,3240],{},"event"," from each context).",[650,3243,3245],{"id":3244},"toolkit-helpers","Toolkit helpers",[454,3247,3248,3250],{},[496,3249,526],{}," exposes the same helpers every built-in adapter uses. The ones relevant to drains:",[471,3252,3253,3263],{},[474,3254,3255],{},[477,3256,3257,3260],{},[480,3258,3259],{},"Export",[480,3261,3262],{},"Purpose",[487,3264,3265,3275,3285,3297,3307,3320,3330,3344],{},[477,3266,3267,3272],{},[492,3268,3269],{},[496,3270,3271],{},"defineHttpDrain(spec)",[492,3273,3274],{},"The HTTP recipe — auto retries, timeouts, identity headers, error isolation",[477,3276,3277,3282],{},[492,3278,3279],{},[496,3280,3281],{},"defineDrain(spec)",[492,3283,3284],{},"Same contract for non-HTTP transports",[477,3286,3287,3292],{},[492,3288,3289],{},[496,3290,3291],{},"resolveAdapterConfig(ns, fields, overrides)",[492,3293,3294,3295,580],{},"Standard config priority chain (overrides → ",[496,3296,579],{},[477,3298,3299,3304],{},[492,3300,3301],{},[496,3302,3303],{},"httpPost(opts)",[492,3305,3306],{},"The retried POST helper used by every built-in HTTP adapter — handles timeout, retries, redacted error messages",[477,3308,3309,3314],{},[492,3310,3311],{},[496,3312,3313],{},"composeDrains(drains)",[492,3315,3316,3317,1176],{},"Combine multiple drains into one (errors isolated, runs concurrently with ",[496,3318,3319],{},"Promise.allSettled",[477,3321,3322,3327],{},[492,3323,3324],{},[496,3325,3326],{},"toTypedAttributeValue(value)",[492,3328,3329],{},"Convert any value to the typed attribute shape used by Axiom \u002F Sentry",[477,3331,3332,3337],{},[492,3333,3334],{},[496,3335,3336],{},"toOtlpAttributeValue(value)",[492,3338,3339,3340,3343],{},"Convert any value to the OTLP ",[496,3341,3342],{},"AnyValue"," shape (used by OTLP \u002F HyperDX \u002F PostHog logs)",[477,3345,3346,3354],{},[492,3347,3348,595,3351],{},[496,3349,3350],{},"OTEL_SEVERITY_NUMBER",[496,3352,3353],{},"OTEL_SEVERITY_TEXT",[492,3355,3356],{},"OTEL log severity tables",[650,3358,402],{"id":3359},"identity-headers",[454,3361,3362,3364],{},[496,3363,507],{}," automatically tags every request with two headers so receivers can identify the traffic:",[471,3366,3367,3377],{},[474,3368,3369],{},[477,3370,3371,3374],{},[480,3372,3373],{},"Header",[480,3375,3376],{},"Value",[487,3378,3379,3392],{},[477,3380,3381,3386],{},[492,3382,3383],{},[496,3384,3385],{},"User-Agent",[492,3387,3388,3391],{},[496,3389,3390],{},"evlog\u002F\u003Cversion>"," (Node \u002F server runtimes only — browsers strip this header)",[477,3393,3394,3399],{},[492,3395,3396],{},[496,3397,3398],{},"X-Evlog-Source",[492,3400,3401,3402,3405],{},"The drain ",[496,3403,3404],{},"name"," you provided",[454,3407,3408,3409,3412,3413,1092],{},"If you build a drain on top of ",[496,3410,3411],{},"httpPost"," directly, you can override or suppress them — see ",[463,3414,402],{"href":403},[650,3416,3418],{"id":3417},"error-handling-already-done-for-you","Error handling — already done for you",[454,3420,3421,3423],{},[496,3422,507],{}," enforces every best practice automatically:",[1841,3425,3426,3436,3446,3454],{},[541,3427,3428,3431,3432,3435],{},[458,3429,3430],{},"Never throws"," — failures are caught and logged with the ",[496,3433,3434],{},"[evlog\u002F\u003Cname>]"," prefix.",[541,3437,3438,3441,3442,3445],{},[458,3439,3440],{},"Retries"," — defaults to 2 attempts on transient errors (configurable via ",[496,3443,3444],{},"retries",").",[541,3447,3448,3451,3452,3445],{},[458,3449,3450],{},"Timeouts"," — defaults to 5000ms (configurable via ",[496,3453,598],{},[541,3455,3456,3459,3460,3462,3463,3465],{},[458,3457,3458],{},"Graceful degradation"," — ",[496,3461,571],{}," returning ",[496,3464,612],{}," makes the drain a no-op.",[454,3467,3468,3469,3471],{},"If you fall back to ",[496,3470,520],{},", follow the same rules manually.",[650,3473,3475],{"id":3474},"publishing-as-a-community-package","Publishing as a community package",[454,3477,3478],{},"Recommended structure for a community drain:",[670,3480,3485],{"className":3481,"code":3483,"language":3484,"meta":676},[3482],"language-text","my-evlog-drain\u002F\n├─ src\u002F\n│  ├─ drain.ts        # createMyDrain via defineHttpDrain\n│  └─ index.ts        # re-exports\n├─ test\u002F              # vitest, mock fetch\n├─ package.json       # peerDependency: \"evlog\"\n└─ README.md\n","text",[496,3486,3483],{"__ignoreMap":676},[454,3488,3489,3490,3492,3493,3496,3497,3500],{},"Add ",[496,3491,2202],{}," as a ",[496,3494,3495],{},"peerDependency"," (not a ",[496,3498,3499],{},"dependency",") — your package shouldn't pull in a copy of evlog at install time.",[3502,3503,3506,3507,3512],"callout",{"color":3504,"icon":3505},"neutral","i-lucide-heart","Built something great? ",[463,3508,3511],{"href":3509,"rel":3510},"https:\u002F\u002Fgithub.com\u002Fhugorcd\u002Fevlog\u002Fpulls",[643],"Open a PR"," to add a row to the Adapters table — the community will thank you.",[650,3514,3516],{"id":3515},"next-steps","Next steps",[538,3518,3519,3525,3533,3539,3545],{},[541,3520,3521,3524],{},[463,3522,3523],{"href":413},"Drain Pipeline"," — wrap your drain in batch + retry + fanout for production",[541,3526,3527,3530,3531],{},[463,3528,3529],{"href":95},"Adapters Overview"," — see how the built-in adapters use ",[496,3532,507],{},[541,3534,3535,3538],{},[463,3536,3537],{"href":395},"Custom Enrichers"," — same toolkit shape for derived event fields",[541,3540,3541,3544],{},[463,3542,3543],{"href":377},"Custom Framework Integration"," — same toolkit shape for HTTP frameworks",[541,3546,3547,3549],{},[463,3548,435],{"href":436}," — security and production tips",[3551,3552,3553],"style",{},"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}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .sBMFI, html code.shiki .sBMFI{--shiki-light:#E2931D;--shiki-default:#FFCB6B;--shiki-dark:#FFCB6B}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .sHdIc, html code.shiki .sHdIc{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#EEFFFF;--shiki-default-font-style:italic;--shiki-dark:#BABED8;--shiki-dark-font-style:italic}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 .sbssI, html code.shiki .sbssI{--shiki-light:#F76D47;--shiki-default:#F78C6C;--shiki-dark:#F78C6C}html pre.shiki code .sHwdD, html code.shiki .sHwdD{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#546E7A;--shiki-default-font-style:italic;--shiki-dark:#676E95;--shiki-dark-font-style:italic}",{"title":676,"searchDepth":694,"depth":694,"links":3555},[3556,3560,3561,3562,3563,3565,3566,3567,3568,3569,3570],{"id":652,"depth":694,"text":3557,"children":3558},"defineHttpDrain (the HTTP recipe)",[3559],{"id":1350,"depth":704,"text":1351},{"id":1833,"depth":694,"text":1834},{"id":1913,"depth":694,"text":1914},{"id":2367,"depth":694,"text":2368},{"id":2739,"depth":694,"text":3564},"defineDrain (non-HTTP transports)",{"id":2954,"depth":694,"text":2955},{"id":3244,"depth":694,"text":3245},{"id":3359,"depth":694,"text":402},{"id":3417,"depth":694,"text":3418},{"id":3474,"depth":694,"text":3475},{"id":3515,"depth":694,"text":3516},"Build a drain for any backend without a built-in adapter — defineHttpDrain for HTTP destinations, defineDrain for any other transport. Standardized config resolution, retries, timeouts, and identity headers handled for you.","md",[3574,3576,3578],{"label":3523,"icon":415,"to":413,"color":3504,"variant":3575},"subtle",{"label":3529,"icon":3577,"to":95,"color":3504,"variant":3575},"i-custom-plug",{"label":435,"icon":318,"to":436,"color":3504,"variant":3575},{},{"title":407,"icon":410},{"title":449,"description":3571},"3keCTtrYI4m0InxzFzdh__CUaCVnTsL4WT_07rNF9mY",[3584,3586],{"title":402,"path":403,"stem":404,"description":3585,"icon":405,"children":-1},"Every drain request sent by evlog is tagged with User-Agent and X-Evlog-Source headers so receivers can identify and triage the traffic. Override or suppress them when your custom drain needs different identity.",{"title":412,"path":413,"stem":414,"description":3587,"icon":415,"children":-1},"Batch events, retry on failure, fan out to multiple destinations, and ship browser logs to your server. The shared pipeline that wraps every drain in production.",1782924671965]