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When you need a destination that isn't covered, you write your own.",[605,619,620],{},"Two factories cover every case:",[622,623,624,637],"table",{},[625,626,627],"thead",{},[628,629,630,634],"tr",{},[631,632,633],"th",{},"You have…",[631,635,636],{},"Use",[638,639,640,659],"tbody",{},[628,641,642,651],{},[643,644,645,646,650],"td",{},"An HTTP backend (REST, JSON ingest, vendor ",[647,648,649],"code",{},"\u002Fv1\u002Flogs"," endpoint)",[643,652,653],{},[614,654,656],{"href":655},"#definehttpdrain-the-http-recipe",[647,657,658],{},"defineHttpDrain",[628,660,661,664],{},[643,662,663],{},"A non-HTTP transport (gRPC, WebSocket, vendor SDK, queue, raw socket)",[643,665,666],{},[614,667,669],{"href":668},"#definedrain-non-http-transports",[647,670,671],{},"defineDrain",[605,673,674,675,678],{},"Both come from ",[647,676,677],{},"evlog\u002Ftoolkit"," and are the exact factories every built-in adapter uses.",[680,681,685,688,787],"prompt",{":actions":682,"description":683,"icon":684},"[\"copy\",\"cursor\",\"claude\"]","Build a custom evlog drain","i-lucide-code-2",[605,686,687],{},"Build a custom evlog drain that ships wide events to a backend without a built-in adapter.",[689,690,691,706,717,732,750,765,770,780],"ul",{},[692,693,694,695,698,699,701,702,705],"li",{},"For HTTP backends, use ",[647,696,697],{},"defineHttpDrain({ name, resolve, encode })"," from ",[647,700,677],{},", and never call ",[647,703,704],{},"fetch"," directly",[692,707,708,709,712,713,716],{},"For non-HTTP transports (queue, DB, native SDK, raw socket), use ",[647,710,711],{},"defineDrain({ name, send })"," and implement ",[647,714,715],{},"send(events)"," myself",[692,718,719,720,723,724,727,728,731],{},"Resolve config lazily inside ",[647,721,722],{},"resolve()"," via ",[647,725,726],{},"resolveAdapterConfig(namespace, fields, overrides)"," so users get the standard precedence (overrides → ",[647,729,730],{},"runtimeConfig.evlog.\u003Cns>"," → env)",[692,733,734,735,738,739,742,743,746,747],{},"Use the standardized field names: ",[647,736,737],{},"apiKey"," for bearer secrets, ",[647,740,741],{},"endpoint"," for the base URL, ",[647,744,745],{},"serviceName",", ",[647,748,749],{},"timeout",[692,751,752,753,756,757,760,761,764],{},"Encode batched events into the destination's wire format inside ",[647,754,755],{},"encode(events, config)",", return ",[647,758,759],{},"{ url, headers, body }"," (or ",[647,762,763],{},"null"," to opt out of the batch)",[692,766,767,769],{},[647,768,658],{}," handles retries, timeouts, error isolation, batching, and identity headers. Don't reimplement them",[692,771,772,773,776,777,779],{},"Wire the drain via ",[647,774,775],{},"defineEvlog({ drain: createMyDrain() })"," or my framework's middleware ",[647,778,611],{}," option",[692,781,782,783,786],{},"For production, wrap the result in ",[647,784,785],{},"createDrainPipeline"," for batching + retries",[605,788,789,790,795,796],{},"Docs: ",[614,791,792],{"href":792,"rel":793},"https:\u002F\u002Fwww.evlog.dev\u002Fextend\u002Fcustom-drains",[794],"nofollow","\nPipeline: ",[614,797,798],{"href":798,"rel":799},"https:\u002F\u002Fwww.evlog.dev\u002Fextend\u002Fdrain-pipeline",[794],[801,802,804,806],"h2",{"id":803},"definehttpdrain-the-http-recipe",[647,805,658],{}," (the HTTP recipe)",[605,808,809,810,812,813,815,816,819],{},"The recipe every built-in adapter follows. Two pure functions: ",[647,811,722],{}," returns the config (or ",[647,814,763],{}," to skip), ",[647,817,818],{},"encode()"," returns the HTTP request payload.",[821,822,823],"code-collapse",{},[824,825,831],"pre",{"className":826,"code":827,"filename":828,"language":829,"meta":830,"style":830},"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","",[647,832,833,846,856,864,875,893,900,913,926,937,948,954,959,990,1032,1066,1084,1090,1095,1129,1149,1166,1185,1229,1254,1276,1285,1291,1305,1311,1337,1374,1384,1406,1434,1440,1464,1474,1482],{"__ignoreMap":830},[834,835,838,842],"span",{"class":836,"line":837},"line",1,[834,839,841],{"class":840},"s7zQu","import",[834,843,845],{"class":844},"sMK4o"," {\n",[834,847,849,853],{"class":836,"line":848},2,[834,850,852],{"class":851},"sTEyZ"," defineHttpDrain",[834,854,855],{"class":844},",\n",[834,857,859,862],{"class":836,"line":858},3,[834,860,861],{"class":851}," resolveAdapterConfig",[834,863,855],{"class":844},[834,865,867,870,873],{"class":836,"line":866},4,[834,868,869],{"class":840}," type",[834,871,872],{"class":851}," ConfigField",[834,874,855],{"class":844},[834,876,878,881,884,887,890],{"class":836,"line":877},5,[834,879,880],{"class":844},"}",[834,882,883],{"class":840}," from",[834,885,886],{"class":844}," '",[834,888,677],{"class":889},"sfazB",[834,891,892],{"class":844},"'\n",[834,894,896],{"class":836,"line":895},6,[834,897,899],{"emptyLinePlaceholder":898},true,"\n",[834,901,903,907,911],{"class":836,"line":902},7,[834,904,906],{"class":905},"spNyl","interface",[834,908,910],{"class":909},"sBMFI"," MyServiceConfig",[834,912,845],{"class":844},[834,914,916,920,923],{"class":836,"line":915},8,[834,917,919],{"class":918},"swJcz"," apiKey",[834,921,922],{"class":844},":",[834,924,925],{"class":909}," string\n",[834,927,929,932,935],{"class":836,"line":928},9,[834,930,931],{"class":918}," endpoint",[834,933,934],{"class":844},"?:",[834,936,925],{"class":909},[834,938,940,943,945],{"class":836,"line":939},10,[834,941,942],{"class":918}," timeout",[834,944,934],{"class":844},[834,946,947],{"class":909}," number\n",[834,949,951],{"class":836,"line":950},11,[834,952,953],{"class":844},"}\n",[834,955,957],{"class":836,"line":956},12,[834,958,899],{"emptyLinePlaceholder":898},[834,960,962,965,968,970,972,975,978,981,984,987],{"class":836,"line":961},13,[834,963,964],{"class":905},"const",[834,966,967],{"class":851}," FIELDS",[834,969,922],{"class":844},[834,971,872],{"class":909},[834,973,974],{"class":844},"\u003C",[834,976,977],{"class":909},"MyServiceConfig",[834,979,980],{"class":844},">",[834,982,983],{"class":851},"[] ",[834,985,986],{"class":844},"=",[834,988,989],{"class":851}," [\n",[834,991,993,996,999,1001,1003,1005,1008,1011,1014,1016,1019,1021,1024,1026,1029],{"class":836,"line":992},14,[834,994,995],{"class":844}," {",[834,997,998],{"class":918}," key",[834,1000,922],{"class":844},[834,1002,886],{"class":844},[834,1004,737],{"class":889},[834,1006,1007],{"class":844},"'",[834,1009,1010],{"class":844},",",[834,1012,1013],{"class":918}," env",[834,1015,922],{"class":844},[834,1017,1018],{"class":851}," [",[834,1020,1007],{"class":844},[834,1022,1023],{"class":889},"MYSERVICE_API_KEY",[834,1025,1007],{"class":844},[834,1027,1028],{"class":851},"] ",[834,1030,1031],{"class":844},"},\n",[834,1033,1035,1037,1039,1041,1043,1045,1047,1049,1051,1053,1055,1057,1060,1062,1064],{"class":836,"line":1034},15,[834,1036,995],{"class":844},[834,1038,998],{"class":918},[834,1040,922],{"class":844},[834,1042,886],{"class":844},[834,1044,741],{"class":889},[834,1046,1007],{"class":844},[834,1048,1010],{"class":844},[834,1050,1013],{"class":918},[834,1052,922],{"class":844},[834,1054,1018],{"class":851},[834,1056,1007],{"class":844},[834,1058,1059],{"class":889},"MYSERVICE_ENDPOINT",[834,1061,1007],{"class":844},[834,1063,1028],{"class":851},[834,1065,1031],{"class":844},[834,1067,1069,1071,1073,1075,1077,1079,1081],{"class":836,"line":1068},16,[834,1070,995],{"class":844},[834,1072,998],{"class":918},[834,1074,922],{"class":844},[834,1076,886],{"class":844},[834,1078,749],{"class":889},[834,1080,1007],{"class":844},[834,1082,1083],{"class":844}," },\n",[834,1085,1087],{"class":836,"line":1086},17,[834,1088,1089],{"class":851},"]\n",[834,1091,1093],{"class":836,"line":1092},18,[834,1094,899],{"emptyLinePlaceholder":898},[834,1096,1098,1101,1104,1108,1111,1115,1117,1120,1122,1124,1127],{"class":836,"line":1097},19,[834,1099,1100],{"class":840},"export",[834,1102,1103],{"class":905}," function",[834,1105,1107],{"class":1106},"s2Zo4"," createMyServiceDrain",[834,1109,1110],{"class":844},"(",[834,1112,1114],{"class":1113},"sHdIc","overrides",[834,1116,934],{"class":844},[834,1118,1119],{"class":909}," Partial",[834,1121,974],{"class":844},[834,1123,977],{"class":909},[834,1125,1126],{"class":844},">)",[834,1128,845],{"class":844},[834,1130,1132,1135,1138,1140,1142,1144,1146],{"class":836,"line":1131},20,[834,1133,1134],{"class":840}," return",[834,1136,1137],{"class":1106}," defineHttpDrain",[834,1139,974],{"class":844},[834,1141,977],{"class":909},[834,1143,980],{"class":844},[834,1145,1110],{"class":918},[834,1147,1148],{"class":844},"{\n",[834,1150,1152,1155,1157,1159,1162,1164],{"class":836,"line":1151},21,[834,1153,1154],{"class":918}," name",[834,1156,922],{"class":844},[834,1158,886],{"class":844},[834,1160,1161],{"class":889},"myservice",[834,1163,1007],{"class":844},[834,1165,855],{"class":844},[834,1167,1169,1172,1174,1177,1180,1183],{"class":836,"line":1168},22,[834,1170,1171],{"class":1106}," resolve",[834,1173,922],{"class":844},[834,1175,1176],{"class":905}," async",[834,1178,1179],{"class":844}," ()",[834,1181,1182],{"class":905}," =>",[834,1184,845],{"class":844},[834,1186,1188,1191,1194,1197,1200,1203,1205,1207,1209,1211,1213,1215,1217,1219,1221,1223,1226],{"class":836,"line":1187},23,[834,1189,1190],{"class":905}," const",[834,1192,1193],{"class":851}," cfg",[834,1195,1196],{"class":844}," =",[834,1198,1199],{"class":840}," await",[834,1201,1202],{"class":1106}," resolveAdapterConfig",[834,1204,974],{"class":844},[834,1206,977],{"class":909},[834,1208,980],{"class":844},[834,1210,1110],{"class":918},[834,1212,1007],{"class":844},[834,1214,1161],{"class":889},[834,1216,1007],{"class":844},[834,1218,1010],{"class":844},[834,1220,967],{"class":851},[834,1222,1010],{"class":844},[834,1224,1225],{"class":851}," overrides",[834,1227,1228],{"class":918},")\n",[834,1230,1232,1235,1238,1241,1244,1247,1249,1252],{"class":836,"line":1231},24,[834,1233,1234],{"class":840}," if",[834,1236,1237],{"class":918}," (",[834,1239,1240],{"class":844},"!",[834,1242,1243],{"class":851},"cfg",[834,1245,1246],{"class":844},".",[834,1248,737],{"class":851},[834,1250,1251],{"class":918},") ",[834,1253,1148],{"class":844},[834,1255,1257,1260,1262,1265,1267,1269,1272,1274],{"class":836,"line":1256},25,[834,1258,1259],{"class":851}," console",[834,1261,1246],{"class":844},[834,1263,1264],{"class":1106},"error",[834,1266,1110],{"class":918},[834,1268,1007],{"class":844},[834,1270,1271],{"class":889},"[evlog\u002Fmyservice] Missing apiKey",[834,1273,1007],{"class":844},[834,1275,1228],{"class":918},[834,1277,1279,1282],{"class":836,"line":1278},26,[834,1280,1281],{"class":840}," return",[834,1283,1284],{"class":844}," null\n",[834,1286,1288],{"class":836,"line":1287},27,[834,1289,1290],{"class":844}," }\n",[834,1292,1294,1297,1299,1302],{"class":836,"line":1293},28,[834,1295,1296],{"class":840}," return",[834,1298,1193],{"class":851},[834,1300,1301],{"class":840}," as",[834,1303,1304],{"class":909}," MyServiceConfig\n",[834,1306,1308],{"class":836,"line":1307},29,[834,1309,1310],{"class":844}," },\n",[834,1312,1314,1317,1319,1321,1324,1326,1328,1331,1333,1335],{"class":836,"line":1313},30,[834,1315,1316],{"class":1106}," encode",[834,1318,922],{"class":844},[834,1320,1237],{"class":844},[834,1322,1323],{"class":1113},"events",[834,1325,1010],{"class":844},[834,1327,1193],{"class":1113},[834,1329,1330],{"class":844},")",[834,1332,1182],{"class":905},[834,1334,1237],{"class":918},[834,1336,1148],{"class":844},[834,1338,1340,1343,1345,1348,1350,1352,1355,1358,1360,1363,1366,1369,1372],{"class":836,"line":1339},31,[834,1341,1342],{"class":918}," url",[834,1344,922],{"class":844},[834,1346,1347],{"class":844}," `${",[834,1349,1243],{"class":851},[834,1351,1246],{"class":844},[834,1353,1354],{"class":851},"endpoint ",[834,1356,1357],{"class":844},"??",[834,1359,886],{"class":844},[834,1361,1362],{"class":889},"https:\u002F\u002Fapi.myservice.com",[834,1364,1365],{"class":844},"'}",[834,1367,1368],{"class":889},"\u002Fv1\u002Fingest",[834,1370,1371],{"class":844},"`",[834,1373,855],{"class":844},[834,1375,1377,1380,1382],{"class":836,"line":1376},32,[834,1378,1379],{"class":918}," headers",[834,1381,922],{"class":844},[834,1383,845],{"class":844},[834,1385,1387,1390,1393,1395,1397,1399,1402,1404],{"class":836,"line":1386},33,[834,1388,1389],{"class":844}," '",[834,1391,1392],{"class":918},"Content-Type",[834,1394,1007],{"class":844},[834,1396,922],{"class":844},[834,1398,886],{"class":844},[834,1400,1401],{"class":889},"application\u002Fjson",[834,1403,1007],{"class":844},[834,1405,855],{"class":844},[834,1407,1409,1412,1414,1417,1420,1423,1425,1427,1429,1432],{"class":836,"line":1408},34,[834,1410,1411],{"class":918}," Authorization",[834,1413,922],{"class":844},[834,1415,1416],{"class":844}," `",[834,1418,1419],{"class":889},"Bearer ",[834,1421,1422],{"class":844},"${",[834,1424,1243],{"class":851},[834,1426,1246],{"class":844},[834,1428,737],{"class":851},[834,1430,1431],{"class":844},"}`",[834,1433,855],{"class":844},[834,1435,1437],{"class":836,"line":1436},35,[834,1438,1439],{"class":844}," },\n",[834,1441,1443,1446,1448,1451,1453,1456,1458,1460,1462],{"class":836,"line":1442},36,[834,1444,1445],{"class":918}," body",[834,1447,922],{"class":844},[834,1449,1450],{"class":851}," JSON",[834,1452,1246],{"class":844},[834,1454,1455],{"class":1106},"stringify",[834,1457,1110],{"class":918},[834,1459,1323],{"class":851},[834,1461,1330],{"class":918},[834,1463,855],{"class":844},[834,1465,1467,1470,1472],{"class":836,"line":1466},37,[834,1468,1469],{"class":844}," }",[834,1471,1330],{"class":918},[834,1473,855],{"class":844},[834,1475,1477,1480],{"class":836,"line":1476},38,[834,1478,1479],{"class":844}," }",[834,1481,1228],{"class":918},[834,1483,1485],{"class":836,"line":1484},39,[834,1486,953],{"class":844},[605,1488,1489,1490,1492,1493,1496,1497,1500,1501,1505,1506,1509],{},"That's it. ",[647,1491,658],{}," handles retries (default 2), timeouts (default 5000ms), error isolation, and the identity headers (",[647,1494,1495],{},"User-Agent: evlog\u002F\u003Cversion>"," + ",[647,1498,1499],{},"X-Evlog-Source: \u003Cname>","). Your app pipeline keeps running even if your destination is down, and when you wrap the drain in ",[614,1502,1503],{"href":531},[647,1504,785],{},", the pipeline takes over retries through the drain's ",[647,1507,1508],{},"raw"," variant.",[1511,1512,1514],"h3",{"id":1513},"a-5-minute-example-internal-loki-drain","A 5-minute example: internal Loki drain",[605,1516,1517],{},"A complete working drain in 25 lines, with no external config helper:",[824,1519,1524],{"className":1520,"code":1521,"filename":1522,"language":1523,"meta":830,"style":830},"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",[647,1525,1526,1546,1550,1589,1619,1634,1648,1681,1710,1718,1741,1765,1773,1791,1813,1817,1833,1858,1896,1956,1966,1975,1983,1989],{"__ignoreMap":830},[834,1527,1528,1530,1533,1535,1538,1540,1542,1544],{"class":836,"line":837},[834,1529,841],{"class":840},[834,1531,1532],{"class":844}," {",[834,1534,1137],{"class":851},[834,1536,1537],{"class":844}," }",[834,1539,883],{"class":840},[834,1541,886],{"class":844},[834,1543,677],{"class":889},[834,1545,892],{"class":844},[834,1547,1548],{"class":836,"line":848},[834,1549,899],{"emptyLinePlaceholder":898},[834,1551,1552,1554,1556,1559,1561,1563,1565,1567,1570,1572,1575,1577,1580,1582,1584,1587],{"class":836,"line":858},[834,1553,1100],{"class":840},[834,1555,1103],{"class":905},[834,1557,1558],{"class":1106}," createLokiDrain",[834,1560,1110],{"class":844},[834,1562,1114],{"class":1113},[834,1564,934],{"class":844},[834,1566,1532],{"class":844},[834,1568,1569],{"class":918}," url",[834,1571,934],{"class":844},[834,1573,1574],{"class":909}," string",[834,1576,1010],{"class":844},[834,1578,1579],{"class":918}," token",[834,1581,934],{"class":844},[834,1583,1574],{"class":909},[834,1585,1586],{"class":844}," 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process",[834,1669,1246],{"class":844},[834,1671,1672],{"class":851},"env",[834,1674,1246],{"class":844},[834,1676,1677],{"class":851},"LOKI_URL",[834,1679,1680],{"class":844},"!,\n",[834,1682,1683,1686,1688,1690,1692,1695,1697,1699,1701,1703,1705,1708],{"class":836,"line":915},[834,1684,1685],{"class":918}," 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config",[834,1734,1330],{"class":844},[834,1736,1182],{"class":905},[834,1738,1237],{"class":918},[834,1740,1148],{"class":844},[834,1742,1743,1745,1747,1749,1752,1754,1756,1758,1761,1763],{"class":836,"line":950},[834,1744,1342],{"class":918},[834,1746,922],{"class":844},[834,1748,1347],{"class":844},[834,1750,1751],{"class":851},"config",[834,1753,1246],{"class":844},[834,1755,1661],{"class":851},[834,1757,880],{"class":844},[834,1759,1760],{"class":889},"\u002Floki\u002Fapi\u002Fv1\u002Fpush",[834,1762,1371],{"class":844},[834,1764,855],{"class":844},[834,1766,1767,1769,1771],{"class":836,"line":956},[834,1768,1379],{"class":918},[834,1770,922],{"class":844},[834,1772,845],{"class":844},[834,1774,1775,1777,1779,1781,1783,1785,1787,1789],{"class":836,"line":961},[834,1776,1389],{"class":844},[834,1778,1392],{"class":918},[834,1780,1007],{"class":844},[834,1782,922],{"class":844},[834,1784,886],{"class":844},[834,1786,1401],{"class":889},[834,1788,1007],{"class":844},[834,1790,855],{"class":844},[834,1792,1793,1795,1797,1799,1801,1803,1805,1807,1809,1811],{"class":836,"line":992},[834,1794,1411],{"class":918},[834,1796,922],{"class":844},[834,1798,1416],{"class":844},[834,1800,1419],{"class":889},[834,1802,1422],{"class":844},[834,1804,1751],{"class":851},[834,1806,1246],{"class":844},[834,1808,1694],{"class":851},[834,1810,1431],{"class":844},[834,1812,855],{"class":844},[834,1814,1815],{"class":836,"line":1034},[834,1816,1439],{"class":844},[834,1818,1819,1821,1823,1825,1827,1829,1831],{"class":836,"line":1068},[834,1820,1445],{"class":918},[834,1822,922],{"class":844},[834,1824,1450],{"class":851},[834,1826,1246],{"class":844},[834,1828,1455],{"class":1106},[834,1830,1110],{"class":918},[834,1832,1148],{"class":844},[834,1834,1835,1838,1840,1843,1845,1847,1849,1852,1854,1856],{"class":836,"line":1086},[834,1836,1837],{"class":918}," 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1e6",[834,1938,1330],{"class":918},[834,1940,1010],{"class":844},[834,1942,1450],{"class":851},[834,1944,1246],{"class":844},[834,1946,1455],{"class":1106},[834,1948,1110],{"class":918},[834,1950,1851],{"class":851},[834,1952,1953],{"class":918},")]]",[834,1955,855],{"class":844},[834,1957,1958,1961,1964],{"class":836,"line":1131},[834,1959,1960],{"class":844}," }",[834,1962,1963],{"class":918},"))",[834,1965,855],{"class":844},[834,1967,1968,1971,1973],{"class":836,"line":1151},[834,1969,1970],{"class":844}," }",[834,1972,1330],{"class":918},[834,1974,855],{"class":844},[834,1976,1977,1979,1981],{"class":836,"line":1168},[834,1978,1469],{"class":844},[834,1980,1330],{"class":918},[834,1982,855],{"class":844},[834,1984,1985,1987],{"class":836,"line":1187},[834,1986,1479],{"class":844},[834,1988,1228],{"class":918},[834,1990,1991],{"class":836,"line":1231},[834,1992,953],{"class":844},[801,1994,1996],{"id":1995},"know-which-config-wins","Know which config wins",[605,1998,1999,2001],{},[647,2000,726],{}," walks the standard chain so users get the same configuration UX as built-in adapters:",[2003,2004,2005,2011,2017,2023],"ol",{},[692,2006,2007,2008,2010],{},"Explicit ",[647,2009,1114],{}," passed to your factory",[692,2012,2013,2016],{},[647,2014,2015],{},"runtimeConfig.evlog.\u003Cnamespace>"," (Nuxt\u002FNitro)",[692,2018,2019,2022],{},[647,2020,2021],{},"runtimeConfig.\u003Cnamespace>"," (legacy Nuxt\u002FNitro)",[692,2024,2025,2028,2029,2032,2033,2036,2037,2039,2040,1330],{},[647,2026,2027],{},"\u003CNS>_\u003CFIELD>"," env vars (list ",[647,2030,2031],{},"NUXT_\u003CNS>_\u003CFIELD>"," in ",[647,2034,2035],{},"ConfigField.env"," for silent Nuxt compat; show only ",[647,2038,2027],{}," in error messages via ",[647,2041,2042],{},"formatPublicEnvKeys",[605,2044,2045,2046,746,2048,746,2050,746,2052,2054,2055,2057,2058,2060,2061,2064,2065,2068,2069,2072],{},"Field names should follow the project conventions: ",[647,2047,737],{},[647,2049,741],{},[647,2051,745],{},[647,2053,749],{},". If you're renaming an existing field (e.g. ",[647,2056,1694],{}," → ",[647,2059,737],{},"), keep both as ",[647,2062,2063],{},"ConfigField"," entries for one major version. See ",[647,2066,2067],{},"axiom.ts"," and ",[647,2070,2071],{},"better-stack.ts"," for the deprecation pattern.",[801,2074,2076],{"id":2075},"wire-the-drain-into-your-framework","Wire the drain into your framework",[605,2078,2079,2080,2083],{},"Once ",[647,2081,2082],{},"createMyServiceDrain()"," returns the drain, wire it like any other:",[2085,2086,2087,2200,2326,2384,2421,2452],"code-group",{},[824,2088,2091],{"className":826,"code":2089,"filename":2090,"language":829,"meta":830,"style":830},"\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",[647,2092,2093,2099,2118,2122,2136,2140,2163,2194],{"__ignoreMap":830},[834,2094,2095],{"class":836,"line":837},[834,2096,2098],{"class":2097},"sHwdD","\u002F\u002F server\u002Fplugins\u002Fevlog-drain.ts\n",[834,2100,2101,2103,2105,2107,2109,2111,2113,2116],{"class":836,"line":848},[834,2102,841],{"class":840},[834,2104,1532],{"class":844},[834,2106,1107],{"class":851},[834,2108,1537],{"class":844},[834,2110,883],{"class":840},[834,2112,886],{"class":844},[834,2114,2115],{"class":889},"~\u002Fserver\u002Futils\u002Fmy-drain",[834,2117,892],{"class":844},[834,2119,2120],{"class":836,"line":858},[834,2121,899],{"emptyLinePlaceholder":898},[834,2123,2124,2126,2129,2131,2133],{"class":836,"line":866},[834,2125,964],{"class":905},[834,2127,2128],{"class":851}," drain ",[834,2130,986],{"class":844},[834,2132,1107],{"class":1106},[834,2134,2135],{"class":851},"()\n",[834,2137,2138],{"class":836,"line":877},[834,2139,899],{"emptyLinePlaceholder":898},[834,2141,2142,2144,2147,2150,2152,2154,2157,2159,2161],{"class":836,"line":895},[834,2143,1100],{"class":840},[834,2145,2146],{"class":840}," default",[834,2148,2149],{"class":1106}," defineNitroPlugin",[834,2151,1110],{"class":851},[834,2153,1110],{"class":844},[834,2155,2156],{"class":1113},"nitroApp",[834,2158,1330],{"class":844},[834,2160,1182],{"class":905},[834,2162,845],{"class":844},[834,2164,2165,2168,2170,2173,2175,2178,2180,2182,2185,2187,2189,2192],{"class":836,"line":902},[834,2166,2167],{"class":851}," nitroApp",[834,2169,1246],{"class":844},[834,2171,2172],{"class":851},"hooks",[834,2174,1246],{"class":844},[834,2176,2177],{"class":1106},"hook",[834,2179,1110],{"class":918},[834,2181,1007],{"class":844},[834,2183,2184],{"class":889},"evlog:drain",[834,2186,1007],{"class":844},[834,2188,1010],{"class":844},[834,2190,2191],{"class":851}," drain",[834,2193,1228],{"class":918},[834,2195,2196,2198],{"class":836,"line":915},[834,2197,880],{"class":844},[834,2199,1228],{"class":851},[824,2201,2203],{"className":826,"code":2202,"filename":245,"language":829,"meta":830,"style":830},"\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",[647,2204,2205,2210,2230,2249,2253,2290,2306,2320],{"__ignoreMap":830},[834,2206,2207],{"class":836,"line":837},[834,2208,2209],{"class":2097},"\u002F\u002F lib\u002Fevlog.ts\n",[834,2211,2212,2214,2216,2219,2221,2223,2225,2228],{"class":836,"line":848},[834,2213,841],{"class":840},[834,2215,1532],{"class":844},[834,2217,2218],{"class":851}," createEvlog",[834,2220,1537],{"class":844},[834,2222,883],{"class":840},[834,2224,886],{"class":844},[834,2226,2227],{"class":889},"evlog\u002Fnext",[834,2229,892],{"class":844},[834,2231,2232,2234,2236,2238,2240,2242,2244,2247],{"class":836,"line":858},[834,2233,841],{"class":840},[834,2235,1532],{"class":844},[834,2237,1107],{"class":851},[834,2239,1537],{"class":844},[834,2241,883],{"class":840},[834,2243,886],{"class":844},[834,2245,2246],{"class":889},".\u002Fmy-drain",[834,2248,892],{"class":844},[834,2250,2251],{"class":836,"line":866},[834,2252,899],{"emptyLinePlaceholder":898},[834,2254,2255,2257,2260,2262,2265,2267,2270,2272,2275,2277,2280,2282,2284,2286,2288],{"class":836,"line":877},[834,2256,1100],{"class":840},[834,2258,2259],{"class":905}," const",[834,2261,1532],{"class":844},[834,2263,2264],{"class":851}," withEvlog",[834,2266,1010],{"class":844},[834,2268,2269],{"class":851}," useLogger",[834,2271,1010],{"class":844},[834,2273,2274],{"class":851}," log",[834,2276,1010],{"class":844},[834,2278,2279],{"class":851}," createError ",[834,2281,880],{"class":844},[834,2283,1196],{"class":844},[834,2285,2218],{"class":1106},[834,2287,1110],{"class":851},[834,2289,1148],{"class":844},[834,2291,2292,2295,2297,2299,2302,2304],{"class":836,"line":895},[834,2293,2294],{"class":918}," service",[834,2296,922],{"class":844},[834,2298,886],{"class":844},[834,2300,2301],{"class":889},"my-app",[834,2303,1007],{"class":844},[834,2305,855],{"class":844},[834,2307,2308,2311,2313,2315,2318],{"class":836,"line":902},[834,2309,2310],{"class":918}," drain",[834,2312,922],{"class":844},[834,2314,1107],{"class":1106},[834,2316,2317],{"class":851},"()",[834,2319,855],{"class":844},[834,2321,2322,2324],{"class":836,"line":915},[834,2323,880],{"class":844},[834,2325,1228],{"class":851},[824,2327,2330],{"className":826,"code":2328,"filename":2329,"language":829,"meta":830,"style":830},"import { createMyServiceDrain } from '.\u002Fmy-drain'\napp.use(evlog({ drain: createMyServiceDrain() }))\n","Hono \u002F Express \u002F Elysia",[647,2331,2332,2350],{"__ignoreMap":830},[834,2333,2334,2336,2338,2340,2342,2344,2346,2348],{"class":836,"line":837},[834,2335,841],{"class":840},[834,2337,1532],{"class":844},[834,2339,1107],{"class":851},[834,2341,1537],{"class":844},[834,2343,883],{"class":840},[834,2345,886],{"class":844},[834,2347,2246],{"class":889},[834,2349,892],{"class":844},[834,2351,2352,2355,2357,2360,2362,2365,2367,2370,2372,2374,2376,2379,2381],{"class":836,"line":848},[834,2353,2354],{"class":851},"app",[834,2356,1246],{"class":844},[834,2358,2359],{"class":1106},"use",[834,2361,1110],{"class":851},[834,2363,2364],{"class":1106},"evlog",[834,2366,1110],{"class":851},[834,2368,2369],{"class":844},"{",[834,2371,2191],{"class":918},[834,2373,922],{"class":844},[834,2375,1107],{"class":1106},[834,2377,2378],{"class":851},"() ",[834,2380,880],{"class":844},[834,2382,2383],{"class":851},"))\n",[824,2385,2387],{"className":826,"code":2386,"filename":280,"language":829,"meta":830,"style":830},"await app.register(evlog, { drain: createMyServiceDrain() })\n",[647,2388,2389],{"__ignoreMap":830},[834,2390,2391,2394,2397,2399,2402,2405,2407,2409,2411,2413,2415,2417,2419],{"class":836,"line":837},[834,2392,2393],{"class":840},"await",[834,2395,2396],{"class":851}," app",[834,2398,1246],{"class":844},[834,2400,2401],{"class":1106},"register",[834,2403,2404],{"class":851},"(evlog",[834,2406,1010],{"class":844},[834,2408,1532],{"class":844},[834,2410,2191],{"class":918},[834,2412,922],{"class":844},[834,2414,1107],{"class":1106},[834,2416,2378],{"class":851},[834,2418,880],{"class":844},[834,2420,1228],{"class":851},[824,2422,2424],{"className":826,"code":2423,"filename":265,"language":829,"meta":830,"style":830},"EvlogModule.forRoot({ drain: createMyServiceDrain() })\n",[647,2425,2426],{"__ignoreMap":830},[834,2427,2428,2431,2433,2436,2438,2440,2442,2444,2446,2448,2450],{"class":836,"line":837},[834,2429,2430],{"class":851},"EvlogModule",[834,2432,1246],{"class":844},[834,2434,2435],{"class":1106},"forRoot",[834,2437,1110],{"class":851},[834,2439,2369],{"class":844},[834,2441,2191],{"class":918},[834,2443,922],{"class":844},[834,2445,1107],{"class":1106},[834,2447,2378],{"class":851},[834,2449,880],{"class":844},[834,2451,1228],{"class":851},[824,2453,2455],{"className":826,"code":2454,"filename":300,"language":829,"meta":830,"style":830},"import { initLogger } from 'evlog'\nimport { createMyServiceDrain } from '.\u002Fmy-drain'\n\ninitLogger({ drain: createMyServiceDrain() })\n",[647,2456,2457,2476,2494,2498],{"__ignoreMap":830},[834,2458,2459,2461,2463,2466,2468,2470,2472,2474],{"class":836,"line":837},[834,2460,841],{"class":840},[834,2462,1532],{"class":844},[834,2464,2465],{"class":851}," initLogger",[834,2467,1537],{"class":844},[834,2469,883],{"class":840},[834,2471,886],{"class":844},[834,2473,2364],{"class":889},[834,2475,892],{"class":844},[834,2477,2478,2480,2482,2484,2486,2488,2490,2492],{"class":836,"line":848},[834,2479,841],{"class":840},[834,2481,1532],{"class":844},[834,2483,1107],{"class":851},[834,2485,1537],{"class":844},[834,2487,883],{"class":840},[834,2489,886],{"class":844},[834,2491,2246],{"class":889},[834,2493,892],{"class":844},[834,2495,2496],{"class":836,"line":858},[834,2497,899],{"emptyLinePlaceholder":898},[834,2499,2500,2503,2505,2507,2509,2511,2513,2515,2517],{"class":836,"line":866},[834,2501,2502],{"class":1106},"initLogger",[834,2504,1110],{"class":851},[834,2506,2369],{"class":844},[834,2508,2191],{"class":918},[834,2510,922],{"class":844},[834,2512,1107],{"class":1106},[834,2514,2378],{"class":851},[834,2516,880],{"class":844},[834,2518,1228],{"class":851},[605,2520,2521,2522,2526],{},"For production, wrap it once in ",[614,2523,2524],{"href":531},[647,2525,785],{}," so events are batched and retried.",[801,2528,2530],{"id":2529},"filter-or-transform-before-sending","Filter or transform before sending",[605,2532,2533,2535,2536,2539,2540,2542],{},[647,2534,818],{}," receives the full batch of ",[647,2537,2538],{},"WideEvent[]"," plus the resolved config. Filter or transform inline, and returning ",[647,2541,763],{}," is a clean opt-out for that batch:",[824,2544,2546],{"className":826,"code":2545,"language":829,"meta":830,"style":830},"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, durationMs: e.durationMs },\n }))\n\n return {\n url: `${cfg.endpoint}\u002Fv1\u002Fpush`,\n headers: { 'Content-Type': 'application\u002Fjson' },\n body: JSON.stringify(payload),\n }\n}\n",[647,2547,2548,2569,2629,2656,2660,2685,2717,2739,2803,2809,2813,2819,2843,2868,2890,2895],{"__ignoreMap":830},[834,2549,2550,2553,2555,2557,2559,2561,2563,2565,2567],{"class":836,"line":837},[834,2551,2552],{"class":909},"encode",[834,2554,922],{"class":844},[834,2556,1237],{"class":844},[834,2558,1323],{"class":1113},[834,2560,1010],{"class":844},[834,2562,1193],{"class":1113},[834,2564,1330],{"class":844},[834,2566,1182],{"class":905},[834,2568,845],{"class":844},[834,2570,2571,2574,2577,2579,2581,2583,2586,2588,2590,2592,2594,2596,2598,2601,2603,2605,2607,2610,2612,2614,2617,2620,2622,2625,2627],{"class":836,"line":848},[834,2572,2573],{"class":905}," const",[834,2575,2576],{"class":851}," 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url",[834,2825,922],{"class":844},[834,2827,1347],{"class":844},[834,2829,1243],{"class":851},[834,2831,1246],{"class":844},[834,2833,741],{"class":851},[834,2835,880],{"class":844},[834,2837,2838],{"class":889},"\u002Fv1\u002Fpush",[834,2840,1371],{"class":844},[834,2842,855],{"class":844},[834,2844,2845,2848,2850,2852,2854,2856,2858,2860,2862,2864,2866],{"class":836,"line":961},[834,2846,2847],{"class":918}," headers",[834,2849,922],{"class":844},[834,2851,1532],{"class":844},[834,2853,886],{"class":844},[834,2855,1392],{"class":918},[834,2857,1007],{"class":844},[834,2859,922],{"class":844},[834,2861,886],{"class":844},[834,2863,1401],{"class":889},[834,2865,1007],{"class":844},[834,2867,1083],{"class":844},[834,2869,2870,2873,2875,2877,2879,2881,2883,2886,2888],{"class":836,"line":992},[834,2871,2872],{"class":918}," body",[834,2874,922],{"class":844},[834,2876,1450],{"class":851},[834,2878,1246],{"class":844},[834,2880,1455],{"class":1106},[834,2882,1110],{"class":918},[834,2884,2885],{"class":851},"payload",[834,2887,1330],{"class":918},[834,2889,855],{"class":844},[834,2891,2892],{"class":836,"line":1034},[834,2893,2894],{"class":844}," }\n",[834,2896,2897],{"class":836,"line":1068},[834,2898,953],{"class":844},[801,2900,2902,2904],{"id":2901},"definedrain-non-http-transports",[647,2903,671],{}," (non-HTTP transports)",[605,2906,2907,2908,2910],{},"If your destination requires gRPC, a vendor SDK, a queue client, a WebSocket, or a raw socket, drop one level lower with ",[647,2909,671],{},". You own the transport; the toolkit still gives you config resolution, error isolation, and a consistent shape.",[824,2912,2914],{"className":826,"code":2913,"language":829,"meta":830,"style":830},"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",[647,2915,2916,2935,2939,2955,2975,2990,3029,3052,3087,3091],{"__ignoreMap":830},[834,2917,2918,2920,2922,2925,2927,2929,2931,2933],{"class":836,"line":837},[834,2919,841],{"class":840},[834,2921,1532],{"class":844},[834,2923,2924],{"class":851}," defineDrain",[834,2926,1537],{"class":844},[834,2928,883],{"class":840},[834,2930,886],{"class":844},[834,2932,677],{"class":889},[834,2934,892],{"class":844},[834,2936,2937],{"class":836,"line":848},[834,2938,899],{"emptyLinePlaceholder":898},[834,2940,2941,2943,2945,2948,2950,2952],{"class":836,"line":858},[834,2942,1100],{"class":840},[834,2944,2259],{"class":905},[834,2946,2947],{"class":851}," createCustomTransportDrain ",[834,2949,986],{"class":844},[834,2951,1179],{"class":844},[834,2953,2954],{"class":905}," =>\n",[834,2956,2957,2960,2962,2965,2967,2969,2971,2973],{"class":836,"line":866},[834,2958,2959],{"class":1106}," defineDrain",[834,2961,1597],{"class":844},[834,2963,2964],{"class":918}," apiKey",[834,2966,922],{"class":844},[834,2968,1574],{"class":909},[834,2970,1614],{"class":844},[834,2972,1110],{"class":851},[834,2974,1148],{"class":844},[834,2976,2977,2979,2981,2983,2986,2988],{"class":836,"line":877},[834,2978,1154],{"class":918},[834,2980,922],{"class":844},[834,2982,886],{"class":844},[834,2984,2985],{"class":889},"custom",[834,2987,1007],{"class":844},[834,2989,855],{"class":844},[834,2991,2992,2994,2996,2998,3000,3002,3004,3006,3008,3010,3012,3014,3016,3018,3021,3023,3025,3027],{"class":836,"line":895},[834,2993,1171],{"class":1106},[834,2995,922],{"class":844},[834,2997,1176],{"class":905},[834,2999,1179],{"class":844},[834,3001,1182],{"class":905},[834,3003,1237],{"class":851},[834,3005,2369],{"class":844},[834,3007,2964],{"class":918},[834,3009,922],{"class":844},[834,3011,1667],{"class":851},[834,3013,1246],{"class":844},[834,3015,1672],{"class":851},[834,3017,1246],{"class":844},[834,3019,3020],{"class":851},"MY_KEY",[834,3022,1240],{"class":844},[834,3024,1537],{"class":844},[834,3026,1330],{"class":851},[834,3028,855],{"class":844},[834,3030,3031,3034,3036,3038,3040,3042,3044,3046,3048,3050],{"class":836,"line":902},[834,3032,3033],{"class":1106}," send",[834,3035,922],{"class":844},[834,3037,1176],{"class":905},[834,3039,1237],{"class":844},[834,3041,1323],{"class":1113},[834,3043,1010],{"class":844},[834,3045,1193],{"class":1113},[834,3047,1330],{"class":844},[834,3049,1182],{"class":905},[834,3051,845],{"class":844},[834,3053,3054,3057,3060,3062,3065,3067,3069,3071,3073,3075,3077,3079,3081,3083,3085],{"class":836,"line":915},[834,3055,3056],{"class":840}," await",[834,3058,3059],{"class":851}," myVendorSdk",[834,3061,1246],{"class":844},[834,3063,3064],{"class":1106},"publish",[834,3066,1110],{"class":918},[834,3068,1323],{"class":851},[834,3070,1010],{"class":844},[834,3072,1532],{"class":844},[834,3074,1579],{"class":918},[834,3076,922],{"class":844},[834,3078,1193],{"class":851},[834,3080,1246],{"class":844},[834,3082,737],{"class":851},[834,3084,1537],{"class":844},[834,3086,1228],{"class":918},[834,3088,3089],{"class":836,"line":928},[834,3090,1310],{"class":844},[834,3092,3093,3095],{"class":836,"line":939},[834,3094,1479],{"class":844},[834,3096,1228],{"class":851},[605,3098,3099,3100,3103,3104,3106,3107,3109,3110,3113,3114,3117,3118,3120],{},"Let ",[647,3101,3102],{},"send"," throw on failure. ",[647,3105,671],{}," handles the isolation: a direct call swallows the error and logs it with your drain's name, while the ",[647,3108,1508],{}," variant on the returned function rejects, which is how ",[614,3111,3112],{"href":531},"the pipeline","'s retry and ",[647,3115,3116],{},"onDropped"," observe failures. A ",[647,3119,3102],{}," that swallows its own errors makes your drain unretryable.",[801,3122,3124],{"id":3123},"what-a-draincontext-carries","What a DrainContext carries",[605,3126,3127,3128,3130,3131,3134],{},"When evlog calls your drain through ",[647,3129,2184],{},", it passes a ",[647,3132,3133],{},"DrainContext"," per event:",[824,3136,3139],{"className":826,"code":3137,"filename":3138,"language":829,"meta":830,"style":830},"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",[647,3140,3141,3150,3155,3165,3169,3174,3183,3192,3201,3210,3214,3218,3223,3245,3249,3253,3262,3271,3312,3320,3329,3338,3347,3356,3365,3370,3390],{"__ignoreMap":830},[834,3142,3143,3145,3148],{"class":836,"line":837},[834,3144,906],{"class":905},[834,3146,3147],{"class":909}," DrainContext",[834,3149,845],{"class":844},[834,3151,3152],{"class":836,"line":848},[834,3153,3154],{"class":2097}," \u002F** The complete wide event with all accumulated context *\u002F\n",[834,3156,3157,3160,3162],{"class":836,"line":858},[834,3158,3159],{"class":918}," event",[834,3161,922],{"class":844},[834,3163,3164],{"class":909}," WideEvent\n",[834,3166,3167],{"class":836,"line":866},[834,3168,899],{"emptyLinePlaceholder":898},[834,3170,3171],{"class":836,"line":877},[834,3172,3173],{"class":2097}," \u002F** Request metadata *\u002F\n",[834,3175,3176,3179,3181],{"class":836,"line":895},[834,3177,3178],{"class":918}," request",[834,3180,934],{"class":844},[834,3182,845],{"class":844},[834,3184,3185,3188,3190],{"class":836,"line":902},[834,3186,3187],{"class":918}," method",[834,3189,922],{"class":844},[834,3191,925],{"class":909},[834,3193,3194,3197,3199],{"class":836,"line":915},[834,3195,3196],{"class":918}," path",[834,3198,922],{"class":844},[834,3200,925],{"class":909},[834,3202,3203,3206,3208],{"class":836,"line":928},[834,3204,3205],{"class":918}," requestId",[834,3207,922],{"class":844},[834,3209,925],{"class":909},[834,3211,3212],{"class":836,"line":939},[834,3213,2894],{"class":844},[834,3215,3216],{"class":836,"line":950},[834,3217,899],{"emptyLinePlaceholder":898},[834,3219,3220],{"class":836,"line":956},[834,3221,3222],{"class":2097}," \u002F** Safe HTTP headers (sensitive headers filtered) *\u002F\n",[834,3224,3225,3228,3230,3233,3235,3238,3240,3242],{"class":836,"line":961},[834,3226,3227],{"class":918}," headers",[834,3229,934],{"class":844},[834,3231,3232],{"class":909}," Record",[834,3234,974],{"class":844},[834,3236,3237],{"class":909},"string",[834,3239,1010],{"class":844},[834,3241,1574],{"class":909},[834,3243,3244],{"class":844},">\n",[834,3246,3247],{"class":836,"line":992},[834,3248,953],{"class":844},[834,3250,3251],{"class":836,"line":1034},[834,3252,899],{"emptyLinePlaceholder":898},[834,3254,3255,3257,3260],{"class":836,"line":1068},[834,3256,906],{"class":905},[834,3258,3259],{"class":909}," WideEvent",[834,3261,845],{"class":844},[834,3263,3264,3267,3269],{"class":836,"line":1086},[834,3265,3266],{"class":918}," timestamp",[834,3268,922],{"class":844},[834,3270,925],{"class":909},[834,3272,3273,3276,3278,3280,3283,3285,3288,3290,3293,3295,3297,3299,3302,3304,3306,3308,3310],{"class":836,"line":1092},[834,3274,3275],{"class":918}," level",[834,3277,922],{"class":844},[834,3279,886],{"class":844},[834,3281,3282],{"class":889},"debug",[834,3284,1007],{"class":844},[834,3286,3287],{"class":844}," |",[834,3289,886],{"class":844},[834,3291,3292],{"class":889},"info",[834,3294,1007],{"class":844},[834,3296,3287],{"class":844},[834,3298,886],{"class":844},[834,3300,3301],{"class":889},"warn",[834,3303,1007],{"class":844},[834,3305,3287],{"class":844},[834,3307,886],{"class":844},[834,3309,1264],{"class":889},[834,3311,892],{"class":844},[834,3313,3314,3316,3318],{"class":836,"line":1097},[834,3315,2294],{"class":918},[834,3317,922],{"class":844},[834,3319,925],{"class":909},[834,3321,3322,3325,3327],{"class":836,"line":1131},[834,3323,3324],{"class":918}," environment",[834,3326,934],{"class":844},[834,3328,925],{"class":909},[834,3330,3331,3334,3336],{"class":836,"line":1151},[834,3332,3333],{"class":918}," version",[834,3335,934],{"class":844},[834,3337,925],{"class":909},[834,3339,3340,3343,3345],{"class":836,"line":1168},[834,3341,3342],{"class":918}," region",[834,3344,934],{"class":844},[834,3346,925],{"class":909},[834,3348,3349,3352,3354],{"class":836,"line":1187},[834,3350,3351],{"class":918}," commitHash",[834,3353,934],{"class":844},[834,3355,925],{"class":909},[834,3357,3358,3361,3363],{"class":836,"line":1231},[834,3359,3360],{"class":918}," requestId",[834,3362,934],{"class":844},[834,3364,925],{"class":909},[834,3366,3367],{"class":836,"line":1256},[834,3368,3369],{"class":2097}," \u002F\u002F ... plus all fields added via log.set()\n",[834,3371,3372,3375,3378,3380,3382,3385,3387],{"class":836,"line":1278},[834,3373,3374],{"class":851}," [",[834,3376,3377],{"class":1113},"key",[834,3379,922],{"class":844},[834,3381,1574],{"class":909},[834,3383,3384],{"class":851},"]",[834,3386,922],{"class":844},[834,3388,3389],{"class":909}," unknown\n",[834,3391,3392],{"class":836,"line":1287},[834,3393,953],{"class":844},[605,3395,3396,3397,3399,3400,3403,3404,3406,3407,3410],{},"In the batched form your ",[647,3398,818],{}," \u002F ",[647,3401,3402],{},"send()"," receives, you get ",[647,3405,2538],{}," directly (the toolkit unwraps ",[647,3408,3409],{},"event"," from each context).",[801,3412,3414],{"id":3413},"reach-for-a-toolkit-helper","Reach for a toolkit helper",[605,3416,3417,3419],{},[647,3418,677],{}," exposes the same helpers every built-in adapter uses. The ones relevant to drains:",[622,3421,3422,3432],{},[625,3423,3424],{},[628,3425,3426,3429],{},[631,3427,3428],{},"Export",[631,3430,3431],{},"Purpose",[638,3433,3434,3444,3454,3466,3476,3489,3499,3513],{},[628,3435,3436,3441],{},[643,3437,3438],{},[647,3439,3440],{},"defineHttpDrain(spec)",[643,3442,3443],{},"The HTTP recipe — auto retries, timeouts, identity headers, error isolation",[628,3445,3446,3451],{},[643,3447,3448],{},[647,3449,3450],{},"defineDrain(spec)",[643,3452,3453],{},"Same contract for non-HTTP transports",[628,3455,3456,3461],{},[643,3457,3458],{},[647,3459,3460],{},"resolveAdapterConfig(ns, fields, overrides)",[643,3462,3463,3464,731],{},"Standard config priority chain (overrides → ",[647,3465,730],{},[628,3467,3468,3473],{},[643,3469,3470],{},[647,3471,3472],{},"httpPost(opts)",[643,3474,3475],{},"The retried POST helper used by every built-in HTTP adapter — handles timeout, retries, redacted error messages",[628,3477,3478,3483],{},[643,3479,3480],{},[647,3481,3482],{},"composeDrains(drains)",[643,3484,3485,3486,1330],{},"Combine multiple drains into one (errors isolated, runs concurrently with ",[647,3487,3488],{},"Promise.allSettled",[628,3490,3491,3496],{},[643,3492,3493],{},[647,3494,3495],{},"toTypedAttributeValue(value)",[643,3497,3498],{},"Convert any value to the typed attribute shape used by Axiom \u002F Sentry",[628,3500,3501,3506],{},[643,3502,3503],{},[647,3504,3505],{},"toOtlpAttributeValue(value)",[643,3507,3508,3509,3512],{},"Convert any value to the OTLP ",[647,3510,3511],{},"AnyValue"," shape (used by OTLP \u002F HyperDX \u002F PostHog logs)",[628,3514,3515,3523],{},[643,3516,3517,746,3520],{},[647,3518,3519],{},"OTEL_SEVERITY_NUMBER",[647,3521,3522],{},"OTEL_SEVERITY_TEXT",[643,3524,3525],{},"OTEL log severity tables",[801,3527,3529],{"id":3528},"identify-your-traffic-to-the-receiver","Identify your traffic to the receiver",[605,3531,3532,3534],{},[647,3533,658],{}," automatically tags every request with two headers so receivers can identify the traffic:",[622,3536,3537,3547],{},[625,3538,3539],{},[628,3540,3541,3544],{},[631,3542,3543],{},"Header",[631,3545,3546],{},"Value",[638,3548,3549,3562],{},[628,3550,3551,3556],{},[643,3552,3553],{},[647,3554,3555],{},"User-Agent",[643,3557,3558,3561],{},[647,3559,3560],{},"evlog\u002F\u003Cversion>"," (Node \u002F server runtimes only — browsers strip this header)",[628,3563,3564,3569],{},[643,3565,3566],{},[647,3567,3568],{},"X-Evlog-Source",[643,3570,3571,3572,3575],{},"The drain ",[647,3573,3574],{},"name"," you provided",[605,3577,3578,3579,3582,3583,1246],{},"If you build a drain on top of ",[647,3580,3581],{},"httpPost"," directly, you can override or suppress them. See ",[614,3584,520],{"href":521},[801,3586,3588],{"id":3587},"errors-are-already-handled-for-you","Errors are already handled for you",[605,3590,3591,3593],{},[647,3592,658],{}," enforces every best practice automatically:",[2003,3595,3596,3606,3616,3624],{},[692,3597,3598,3601,3602,3605],{},[609,3599,3600],{},"Never throws",": failures are caught and logged with the ",[647,3603,3604],{},"[evlog\u002F\u003Cname>]"," prefix.",[692,3607,3608,3611,3612,3615],{},[609,3609,3610],{},"Retries",": defaults to 2 attempts on transient errors (configurable via ",[647,3613,3614],{},"retries",").",[692,3617,3618,3621,3622,3615],{},[609,3619,3620],{},"Timeouts",": defaults to 5000ms (configurable via ",[647,3623,749],{},[692,3625,3626,3629,3630,3632,3633,3635],{},[609,3627,3628],{},"Graceful degradation",": ",[647,3631,722],{}," returning ",[647,3634,763],{}," makes the drain a no-op.",[605,3637,3638,3639,3641],{},"If you fall back to ",[647,3640,671],{},", follow the same rules manually.",[801,3643,3645],{"id":3644},"publish-it-as-a-community-package","Publish it as a community package",[605,3647,3648],{},"Recommended structure for a community drain:",[824,3650,3655],{"className":3651,"code":3653,"language":3654,"meta":830},[3652],"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",[647,3656,3653],{"__ignoreMap":830},[605,3658,3659,3660,3662,3663,3666,3667,3670],{},"Add ",[647,3661,2364],{}," as a ",[647,3664,3665],{},"peerDependency"," (not a ",[647,3668,3669],{},"dependency","), so your package will not pull in a copy of evlog at install time.",[3672,3673,3676,3677,3682],"callout",{"color":3674,"icon":3675},"neutral","i-lucide-heart","Built something great? ",[614,3678,3681],{"href":3679,"rel":3680},"https:\u002F\u002Fgithub.com\u002Fevloghq\u002Fevlog\u002Fpulls",[794],"Open a PR"," to add a row to the Adapters table. The community will thank you.",[801,3684,3686],{"id":3685},"next-steps","Next steps",[689,3688,3689,3695,3703,3709,3715],{},[692,3690,3691,3694],{},[614,3692,3693],{"href":531},"Drain Pipeline",": wrap your drain in batch + retry + fanout for production",[692,3696,3697,3700,3701],{},[614,3698,3699],{"href":153},"Adapters Overview",": see how the built-in adapters use ",[647,3702,658],{},[692,3704,3705,3708],{},[614,3706,3707],{"href":513},"Custom Enrichers",": same toolkit shape for derived event fields",[692,3710,3711,3714],{},[614,3712,3713],{"href":491},"Custom Framework Integration",": same toolkit shape for HTTP frameworks",[692,3716,3717,3719],{},[614,3718,556],{"href":557},": security and production tips",[3721,3722,3723],"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":830,"searchDepth":848,"depth":848,"links":3725},[3726,3730,3731,3732,3733,3735,3736,3737,3738,3739,3740],{"id":803,"depth":848,"text":3727,"children":3728},"defineHttpDrain (the HTTP recipe)",[3729],{"id":1513,"depth":858,"text":1514},{"id":1995,"depth":848,"text":1996},{"id":2075,"depth":848,"text":2076},{"id":2529,"depth":848,"text":2530},{"id":2901,"depth":848,"text":3734},"defineDrain (non-HTTP transports)",{"id":3123,"depth":848,"text":3124},{"id":3413,"depth":848,"text":3414},{"id":3528,"depth":848,"text":3529},{"id":3587,"depth":848,"text":3588},{"id":3644,"depth":848,"text":3645},{"id":3685,"depth":848,"text":3686},"Build a drain for any backend without a built-in adapter. Config resolution, retries, timeouts, and identity headers are handled for you.","md",[3744,3746,3748],{"label":3693,"icon":533,"to":531,"color":3674,"variant":3745},"subtle",{"label":3699,"icon":3747,"to":153,"color":3674,"variant":3745},"i-custom-plug",{"label":556,"icon":388,"to":557,"color":3674,"variant":3745},{},{"title":525,"icon":528},{"title":600,"description":3741},"QpkJfwzYMd7cLubLbXs0hQvGPKNYWlw0kmpZ8V8qW5w",[3754,3756],{"title":520,"path":521,"stem":522,"description":3755,"icon":523,"children":-1},"Every drain request carries User-Agent and X-Evlog-Source so receivers can triage the traffic. Override or suppress them when you need to.",{"title":530,"path":531,"stem":532,"description":3757,"icon":533,"children":-1},"The pipeline wraps every drain: it batches events, retries on failure, fans out to several destinations, and ships browser logs.",1789076916439]