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When you need a destination that isn't covered, you write your own.",[583,597,598],{},"Two factories cover every case:",[600,601,602,615],"table",{},[603,604,605],"thead",{},[606,607,608,612],"tr",{},[609,610,611],"th",{},"You have…",[609,613,614],{},"Use",[616,617,618,637],"tbody",{},[606,619,620,629],{},[621,622,623,624,628],"td",{},"An HTTP backend (REST, JSON ingest, vendor ",[625,626,627],"code",{},"\u002Fv1\u002Flogs"," endpoint)",[621,630,631],{},[592,632,634],{"href":633},"#definehttpdrain-the-http-recipe",[625,635,636],{},"defineHttpDrain",[606,638,639,642],{},[621,640,641],{},"A non-HTTP transport (gRPC, WebSocket, vendor SDK, queue, raw socket)",[621,643,644],{},[592,645,647],{"href":646},"#definedrain-non-http-transports",[625,648,649],{},"defineDrain",[583,651,652,653,656],{},"Both come from ",[625,654,655],{},"evlog\u002Ftoolkit"," and are the exact factories every built-in adapter uses.",[658,659,663,666,765],"prompt",{":actions":660,"description":661,"icon":662},"[\"copy\",\"cursor\",\"claude\"]","Build a custom evlog drain","i-lucide-code-2",[583,664,665],{},"Build a custom evlog drain that ships wide events to a backend without a built-in adapter.",[667,668,669,684,695,710,728,743,748,758],"ul",{},[670,671,672,673,676,677,679,680,683],"li",{},"For HTTP backends, use ",[625,674,675],{},"defineHttpDrain({ name, resolve, encode })"," from ",[625,678,655],{},", and never call ",[625,681,682],{},"fetch"," directly",[670,685,686,687,690,691,694],{},"For non-HTTP transports (queue, DB, native SDK, raw socket), use ",[625,688,689],{},"defineDrain({ name, send })"," and implement ",[625,692,693],{},"send(events)"," myself",[670,696,697,698,701,702,705,706,709],{},"Resolve config lazily inside ",[625,699,700],{},"resolve()"," via ",[625,703,704],{},"resolveAdapterConfig(namespace, fields, overrides)"," so users get the standard precedence (overrides → ",[625,707,708],{},"runtimeConfig.evlog.\u003Cns>"," → env)",[670,711,712,713,716,717,720,721,724,725],{},"Use the standardized field names: ",[625,714,715],{},"apiKey"," for bearer secrets, ",[625,718,719],{},"endpoint"," for the base URL, ",[625,722,723],{},"serviceName",", ",[625,726,727],{},"timeout",[670,729,730,731,734,735,738,739,742],{},"Encode batched events into the destination's wire format inside ",[625,732,733],{},"encode(events, config)",", return ",[625,736,737],{},"{ url, headers, body }"," (or ",[625,740,741],{},"null"," to opt out of the batch)",[670,744,745,747],{},[625,746,636],{}," handles retries, timeouts, error isolation, batching, and identity headers. Don't reimplement them",[670,749,750,751,754,755,757],{},"Wire the drain via ",[625,752,753],{},"defineEvlog({ drain: createMyDrain() })"," or my framework's middleware ",[625,756,589],{}," option",[670,759,760,761,764],{},"For production, wrap the result in ",[625,762,763],{},"createDrainPipeline"," for batching + retries",[583,766,767,768,773,774],{},"Docs: ",[592,769,770],{"href":770,"rel":771},"https:\u002F\u002Fwww.evlog.dev\u002Fextend\u002Fcustom-drains",[772],"nofollow","\nPipeline: ",[592,775,776],{"href":776,"rel":777},"https:\u002F\u002Fwww.evlog.dev\u002Fextend\u002Fdrain-pipeline",[772],[779,780,782,784],"h2",{"id":781},"definehttpdrain-the-http-recipe",[625,783,636],{}," (the HTTP recipe)",[583,786,787,788,790,791,793,794,797],{},"The recipe every built-in adapter follows. Two pure functions: ",[625,789,700],{}," returns the config (or ",[625,792,741],{}," to skip), ",[625,795,796],{},"encode()"," returns the HTTP request payload.",[799,800,801],"code-collapse",{},[802,803,809],"pre",{"className":804,"code":805,"filename":806,"language":807,"meta":808,"style":808},"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","",[625,810,811,824,834,842,853,871,878,891,904,915,926,932,937,968,1010,1044,1062,1068,1073,1107,1127,1144,1163,1207,1232,1254,1263,1269,1283,1289,1315,1352,1362,1384,1412,1418,1442,1452,1460],{"__ignoreMap":808},[812,813,816,820],"span",{"class":814,"line":815},"line",1,[812,817,819],{"class":818},"s7zQu","import",[812,821,823],{"class":822},"sMK4o"," {\n",[812,825,827,831],{"class":814,"line":826},2,[812,828,830],{"class":829},"sTEyZ","  defineHttpDrain",[812,832,833],{"class":822},",\n",[812,835,837,840],{"class":814,"line":836},3,[812,838,839],{"class":829},"  resolveAdapterConfig",[812,841,833],{"class":822},[812,843,845,848,851],{"class":814,"line":844},4,[812,846,847],{"class":818},"  type",[812,849,850],{"class":829}," ConfigField",[812,852,833],{"class":822},[812,854,856,859,862,865,868],{"class":814,"line":855},5,[812,857,858],{"class":822},"}",[812,860,861],{"class":818}," from",[812,863,864],{"class":822}," '",[812,866,655],{"class":867},"sfazB",[812,869,870],{"class":822},"'\n",[812,872,874],{"class":814,"line":873},6,[812,875,877],{"emptyLinePlaceholder":876},true,"\n",[812,879,881,885,889],{"class":814,"line":880},7,[812,882,884],{"class":883},"spNyl","interface",[812,886,888],{"class":887},"sBMFI"," MyServiceConfig",[812,890,823],{"class":822},[812,892,894,898,901],{"class":814,"line":893},8,[812,895,897],{"class":896},"swJcz","  apiKey",[812,899,900],{"class":822},":",[812,902,903],{"class":887}," string\n",[812,905,907,910,913],{"class":814,"line":906},9,[812,908,909],{"class":896},"  endpoint",[812,911,912],{"class":822},"?:",[812,914,903],{"class":887},[812,916,918,921,923],{"class":814,"line":917},10,[812,919,920],{"class":896},"  timeout",[812,922,912],{"class":822},[812,924,925],{"class":887}," number\n",[812,927,929],{"class":814,"line":928},11,[812,930,931],{"class":822},"}\n",[812,933,935],{"class":814,"line":934},12,[812,936,877],{"emptyLinePlaceholder":876},[812,938,940,943,946,948,950,953,956,959,962,965],{"class":814,"line":939},13,[812,941,942],{"class":883},"const",[812,944,945],{"class":829}," FIELDS",[812,947,900],{"class":822},[812,949,850],{"class":887},[812,951,952],{"class":822},"\u003C",[812,954,955],{"class":887},"MyServiceConfig",[812,957,958],{"class":822},">",[812,960,961],{"class":829},"[] ",[812,963,964],{"class":822},"=",[812,966,967],{"class":829}," [\n",[812,969,971,974,977,979,981,983,986,989,992,994,997,999,1002,1004,1007],{"class":814,"line":970},14,[812,972,973],{"class":822},"  {",[812,975,976],{"class":896}," key",[812,978,900],{"class":822},[812,980,864],{"class":822},[812,982,715],{"class":867},[812,984,985],{"class":822},"'",[812,987,988],{"class":822},",",[812,990,991],{"class":896}," env",[812,993,900],{"class":822},[812,995,996],{"class":829}," [",[812,998,985],{"class":822},[812,1000,1001],{"class":867},"MYSERVICE_API_KEY",[812,1003,985],{"class":822},[812,1005,1006],{"class":829},"] ",[812,1008,1009],{"class":822},"},\n",[812,1011,1013,1015,1017,1019,1021,1023,1025,1027,1029,1031,1033,1035,1038,1040,1042],{"class":814,"line":1012},15,[812,1014,973],{"class":822},[812,1016,976],{"class":896},[812,1018,900],{"class":822},[812,1020,864],{"class":822},[812,1022,719],{"class":867},[812,1024,985],{"class":822},[812,1026,988],{"class":822},[812,1028,991],{"class":896},[812,1030,900],{"class":822},[812,1032,996],{"class":829},[812,1034,985],{"class":822},[812,1036,1037],{"class":867},"MYSERVICE_ENDPOINT",[812,1039,985],{"class":822},[812,1041,1006],{"class":829},[812,1043,1009],{"class":822},[812,1045,1047,1049,1051,1053,1055,1057,1059],{"class":814,"line":1046},16,[812,1048,973],{"class":822},[812,1050,976],{"class":896},[812,1052,900],{"class":822},[812,1054,864],{"class":822},[812,1056,727],{"class":867},[812,1058,985],{"class":822},[812,1060,1061],{"class":822}," },\n",[812,1063,1065],{"class":814,"line":1064},17,[812,1066,1067],{"class":829},"]\n",[812,1069,1071],{"class":814,"line":1070},18,[812,1072,877],{"emptyLinePlaceholder":876},[812,1074,1076,1079,1082,1086,1089,1093,1095,1098,1100,1102,1105],{"class":814,"line":1075},19,[812,1077,1078],{"class":818},"export",[812,1080,1081],{"class":883}," function",[812,1083,1085],{"class":1084},"s2Zo4"," createMyServiceDrain",[812,1087,1088],{"class":822},"(",[812,1090,1092],{"class":1091},"sHdIc","overrides",[812,1094,912],{"class":822},[812,1096,1097],{"class":887}," Partial",[812,1099,952],{"class":822},[812,1101,955],{"class":887},[812,1103,1104],{"class":822},">)",[812,1106,823],{"class":822},[812,1108,1110,1113,1116,1118,1120,1122,1124],{"class":814,"line":1109},20,[812,1111,1112],{"class":818},"  return",[812,1114,1115],{"class":1084}," defineHttpDrain",[812,1117,952],{"class":822},[812,1119,955],{"class":887},[812,1121,958],{"class":822},[812,1123,1088],{"class":896},[812,1125,1126],{"class":822},"{\n",[812,1128,1130,1133,1135,1137,1140,1142],{"class":814,"line":1129},21,[812,1131,1132],{"class":896},"    name",[812,1134,900],{"class":822},[812,1136,864],{"class":822},[812,1138,1139],{"class":867},"myservice",[812,1141,985],{"class":822},[812,1143,833],{"class":822},[812,1145,1147,1150,1152,1155,1158,1161],{"class":814,"line":1146},22,[812,1148,1149],{"class":1084},"    resolve",[812,1151,900],{"class":822},[812,1153,1154],{"class":883}," async",[812,1156,1157],{"class":822}," ()",[812,1159,1160],{"class":883}," =>",[812,1162,823],{"class":822},[812,1164,1166,1169,1172,1175,1178,1181,1183,1185,1187,1189,1191,1193,1195,1197,1199,1201,1204],{"class":814,"line":1165},23,[812,1167,1168],{"class":883},"      const",[812,1170,1171],{"class":829}," cfg",[812,1173,1174],{"class":822}," =",[812,1176,1177],{"class":818}," await",[812,1179,1180],{"class":1084}," resolveAdapterConfig",[812,1182,952],{"class":822},[812,1184,955],{"class":887},[812,1186,958],{"class":822},[812,1188,1088],{"class":896},[812,1190,985],{"class":822},[812,1192,1139],{"class":867},[812,1194,985],{"class":822},[812,1196,988],{"class":822},[812,1198,945],{"class":829},[812,1200,988],{"class":822},[812,1202,1203],{"class":829}," overrides",[812,1205,1206],{"class":896},")\n",[812,1208,1210,1213,1216,1219,1222,1225,1227,1230],{"class":814,"line":1209},24,[812,1211,1212],{"class":818},"      if",[812,1214,1215],{"class":896}," (",[812,1217,1218],{"class":822},"!",[812,1220,1221],{"class":829},"cfg",[812,1223,1224],{"class":822},".",[812,1226,715],{"class":829},[812,1228,1229],{"class":896},") ",[812,1231,1126],{"class":822},[812,1233,1235,1238,1240,1243,1245,1247,1250,1252],{"class":814,"line":1234},25,[812,1236,1237],{"class":829},"        console",[812,1239,1224],{"class":822},[812,1241,1242],{"class":1084},"error",[812,1244,1088],{"class":896},[812,1246,985],{"class":822},[812,1248,1249],{"class":867},"[evlog\u002Fmyservice] Missing apiKey",[812,1251,985],{"class":822},[812,1253,1206],{"class":896},[812,1255,1257,1260],{"class":814,"line":1256},26,[812,1258,1259],{"class":818},"        return",[812,1261,1262],{"class":822}," null\n",[812,1264,1266],{"class":814,"line":1265},27,[812,1267,1268],{"class":822},"      }\n",[812,1270,1272,1275,1277,1280],{"class":814,"line":1271},28,[812,1273,1274],{"class":818},"      return",[812,1276,1171],{"class":829},[812,1278,1279],{"class":818}," as",[812,1281,1282],{"class":887}," MyServiceConfig\n",[812,1284,1286],{"class":814,"line":1285},29,[812,1287,1288],{"class":822},"    },\n",[812,1290,1292,1295,1297,1299,1302,1304,1306,1309,1311,1313],{"class":814,"line":1291},30,[812,1293,1294],{"class":1084},"    encode",[812,1296,900],{"class":822},[812,1298,1215],{"class":822},[812,1300,1301],{"class":1091},"events",[812,1303,988],{"class":822},[812,1305,1171],{"class":1091},[812,1307,1308],{"class":822},")",[812,1310,1160],{"class":883},[812,1312,1215],{"class":896},[812,1314,1126],{"class":822},[812,1316,1318,1321,1323,1326,1328,1330,1333,1336,1338,1341,1344,1347,1350],{"class":814,"line":1317},31,[812,1319,1320],{"class":896},"      url",[812,1322,900],{"class":822},[812,1324,1325],{"class":822}," `${",[812,1327,1221],{"class":829},[812,1329,1224],{"class":822},[812,1331,1332],{"class":829},"endpoint ",[812,1334,1335],{"class":822},"??",[812,1337,864],{"class":822},[812,1339,1340],{"class":867},"https:\u002F\u002Fapi.myservice.com",[812,1342,1343],{"class":822},"'}",[812,1345,1346],{"class":867},"\u002Fv1\u002Fingest",[812,1348,1349],{"class":822},"`",[812,1351,833],{"class":822},[812,1353,1355,1358,1360],{"class":814,"line":1354},32,[812,1356,1357],{"class":896},"      headers",[812,1359,900],{"class":822},[812,1361,823],{"class":822},[812,1363,1365,1368,1371,1373,1375,1377,1380,1382],{"class":814,"line":1364},33,[812,1366,1367],{"class":822},"        '",[812,1369,1370],{"class":896},"Content-Type",[812,1372,985],{"class":822},[812,1374,900],{"class":822},[812,1376,864],{"class":822},[812,1378,1379],{"class":867},"application\u002Fjson",[812,1381,985],{"class":822},[812,1383,833],{"class":822},[812,1385,1387,1390,1392,1395,1398,1401,1403,1405,1407,1410],{"class":814,"line":1386},34,[812,1388,1389],{"class":896},"        Authorization",[812,1391,900],{"class":822},[812,1393,1394],{"class":822}," `",[812,1396,1397],{"class":867},"Bearer ",[812,1399,1400],{"class":822},"${",[812,1402,1221],{"class":829},[812,1404,1224],{"class":822},[812,1406,715],{"class":829},[812,1408,1409],{"class":822},"}`",[812,1411,833],{"class":822},[812,1413,1415],{"class":814,"line":1414},35,[812,1416,1417],{"class":822},"      },\n",[812,1419,1421,1424,1426,1429,1431,1434,1436,1438,1440],{"class":814,"line":1420},36,[812,1422,1423],{"class":896},"      body",[812,1425,900],{"class":822},[812,1427,1428],{"class":829}," JSON",[812,1430,1224],{"class":822},[812,1432,1433],{"class":1084},"stringify",[812,1435,1088],{"class":896},[812,1437,1301],{"class":829},[812,1439,1308],{"class":896},[812,1441,833],{"class":822},[812,1443,1445,1448,1450],{"class":814,"line":1444},37,[812,1446,1447],{"class":822},"    }",[812,1449,1308],{"class":896},[812,1451,833],{"class":822},[812,1453,1455,1458],{"class":814,"line":1454},38,[812,1456,1457],{"class":822},"  }",[812,1459,1206],{"class":896},[812,1461,1463],{"class":814,"line":1462},39,[812,1464,931],{"class":822},[583,1466,1467,1468,1470,1471,1474,1475,1478,1479,1483,1484,1487],{},"That's it. ",[625,1469,636],{}," handles retries (default 2), timeouts (default 5000ms), error isolation, and the identity headers (",[625,1472,1473],{},"User-Agent: evlog\u002F\u003Cversion>"," + ",[625,1476,1477],{},"X-Evlog-Source: \u003Cname>","). Your app pipeline keeps running even if your destination is down, and when you wrap the drain in ",[592,1480,1481],{"href":509},[625,1482,763],{},", the pipeline takes over retries through the drain's ",[625,1485,1486],{},"raw"," variant.",[1489,1490,1492],"h3",{"id":1491},"a-5-minute-example-internal-loki-drain","A 5-minute example: internal Loki drain",[583,1494,1495],{},"A complete working drain in 25 lines, with no external config helper:",[802,1497,1502],{"className":1498,"code":1499,"filename":1500,"language":1501,"meta":808,"style":808},"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",[625,1503,1504,1524,1528,1567,1597,1612,1626,1659,1688,1696,1719,1743,1751,1769,1791,1795,1811,1836,1874,1934,1944,1953,1961,1967],{"__ignoreMap":808},[812,1505,1506,1508,1511,1513,1516,1518,1520,1522],{"class":814,"line":815},[812,1507,819],{"class":818},[812,1509,1510],{"class":822}," {",[812,1512,1115],{"class":829},[812,1514,1515],{"class":822}," }",[812,1517,861],{"class":818},[812,1519,864],{"class":822},[812,1521,655],{"class":867},[812,1523,870],{"class":822},[812,1525,1526],{"class":814,"line":826},[812,1527,877],{"emptyLinePlaceholder":876},[812,1529,1530,1532,1534,1537,1539,1541,1543,1545,1548,1550,1553,1555,1558,1560,1562,1565],{"class":814,"line":836},[812,1531,1078],{"class":818},[812,1533,1081],{"class":883},[812,1535,1536],{"class":1084}," createLokiDrain",[812,1538,1088],{"class":822},[812,1540,1092],{"class":1091},[812,1542,912],{"class":822},[812,1544,1510],{"class":822},[812,1546,1547],{"class":896}," url",[812,1549,912],{"class":822},[812,1551,1552],{"class":887}," string",[812,1554,988],{"class":822},[812,1556,1557],{"class":896}," token",[812,1559,912],{"class":822},[812,1561,1552],{"class":887},[812,1563,1564],{"class":822}," })",[812,1566,823],{"class":822},[812,1568,1569,1571,1573,1576,1578,1580,1582,1584,1586,1588,1590,1593,1595],{"class":814,"line":844},[812,1570,1112],{"class":818},[812,1572,1115],{"class":1084},[812,1574,1575],{"class":822},"\u003C{",[812,1577,1547],{"class":896},[812,1579,900],{"class":822},[812,1581,1552],{"class":887},[812,1583,988],{"class":822},[812,1585,1557],{"class":896},[812,1587,900],{"class":822},[812,1589,1552],{"class":887},[812,1591,1592],{"class":822}," }>",[812,1594,1088],{"class":896},[812,1596,1126],{"class":822},[812,1598,1599,1601,1603,1605,1608,1610],{"class":814,"line":855},[812,1600,1132],{"class":896},[812,1602,900],{"class":822},[812,1604,864],{"class":822},[812,1606,1607],{"class":867},"loki",[812,1609,985],{"class":822},[812,1611,833],{"class":822},[812,1613,1614,1616,1618,1620,1622,1624],{"class":814,"line":873},[812,1615,1149],{"class":1084},[812,1617,900],{"class":822},[812,1619,1157],{"class":822},[812,1621,1160],{"class":883},[812,1623,1215],{"class":896},[812,1625,1126],{"class":822},[812,1627,1628,1630,1632,1634,1637,1640,1643,1646,1648,1651,1653,1656],{"class":814,"line":880},[812,1629,1320],{"class":896},[812,1631,900],{"class":822},[812,1633,1203],{"class":829},[812,1635,1636],{"class":822},"?.",[812,1638,1639],{"class":829},"url",[812,1641,1642],{"class":822}," ??",[812,1644,1645],{"class":829}," process",[812,1647,1224],{"class":822},[812,1649,1650],{"class":829},"env",[812,1652,1224],{"class":822},[812,1654,1655],{"class":829},"LOKI_URL",[812,1657,1658],{"class":822},"!,\n",[812,1660,1661,1664,1666,1668,1670,1673,1675,1677,1679,1681,1683,1686],{"class":814,"line":893},[812,1662,1663],{"class":896},"      token",[812,1665,900],{"class":822},[812,1667,1203],{"class":829},[812,1669,1636],{"class":822},[812,1671,1672],{"class":829},"token",[812,1674,1642],{"class":822},[812,1676,1645],{"class":829},[812,1678,1224],{"class":822},[812,1680,1650],{"class":829},[812,1682,1224],{"class":822},[812,1684,1685],{"class":829},"LOKI_TOKEN",[812,1687,1658],{"class":822},[812,1689,1690,1692,1694],{"class":814,"line":906},[812,1691,1447],{"class":822},[812,1693,1308],{"class":896},[812,1695,833],{"class":822},[812,1697,1698,1700,1702,1704,1706,1708,1711,1713,1715,1717],{"class":814,"line":917},[812,1699,1294],{"class":1084},[812,1701,900],{"class":822},[812,1703,1215],{"class":822},[812,1705,1301],{"class":1091},[812,1707,988],{"class":822},[812,1709,1710],{"class":1091}," config",[812,1712,1308],{"class":822},[812,1714,1160],{"class":883},[812,1716,1215],{"class":896},[812,1718,1126],{"class":822},[812,1720,1721,1723,1725,1727,1730,1732,1734,1736,1739,1741],{"class":814,"line":928},[812,1722,1320],{"class":896},[812,1724,900],{"class":822},[812,1726,1325],{"class":822},[812,1728,1729],{"class":829},"config",[812,1731,1224],{"class":822},[812,1733,1639],{"class":829},[812,1735,858],{"class":822},[812,1737,1738],{"class":867},"\u002Floki\u002Fapi\u002Fv1\u002Fpush",[812,1740,1349],{"class":822},[812,1742,833],{"class":822},[812,1744,1745,1747,1749],{"class":814,"line":934},[812,1746,1357],{"class":896},[812,1748,900],{"class":822},[812,1750,823],{"class":822},[812,1752,1753,1755,1757,1759,1761,1763,1765,1767],{"class":814,"line":939},[812,1754,1367],{"class":822},[812,1756,1370],{"class":896},[812,1758,985],{"class":822},[812,1760,900],{"class":822},[812,1762,864],{"class":822},[812,1764,1379],{"class":867},[812,1766,985],{"class":822},[812,1768,833],{"class":822},[812,1770,1771,1773,1775,1777,1779,1781,1783,1785,1787,1789],{"class":814,"line":970},[812,1772,1389],{"class":896},[812,1774,900],{"class":822},[812,1776,1394],{"class":822},[812,1778,1397],{"class":867},[812,1780,1400],{"class":822},[812,1782,1729],{"class":829},[812,1784,1224],{"class":822},[812,1786,1672],{"class":829},[812,1788,1409],{"class":822},[812,1790,833],{"class":822},[812,1792,1793],{"class":814,"line":1012},[812,1794,1417],{"class":822},[812,1796,1797,1799,1801,1803,1805,1807,1809],{"class":814,"line":1046},[812,1798,1423],{"class":896},[812,1800,900],{"class":822},[812,1802,1428],{"class":829},[812,1804,1224],{"class":822},[812,1806,1433],{"class":1084},[812,1808,1088],{"class":896},[812,1810,1126],{"class":822},[812,1812,1813,1816,1818,1821,1823,1825,1827,1830,1832,1834],{"class":814,"line":1064},[812,1814,1815],{"class":896}," 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1e6",[812,1916,1308],{"class":896},[812,1918,988],{"class":822},[812,1920,1428],{"class":829},[812,1922,1224],{"class":822},[812,1924,1433],{"class":1084},[812,1926,1088],{"class":896},[812,1928,1829],{"class":829},[812,1930,1931],{"class":896},")]]",[812,1933,833],{"class":822},[812,1935,1936,1939,1942],{"class":814,"line":1109},[812,1937,1938],{"class":822},"        }",[812,1940,1941],{"class":896},"))",[812,1943,833],{"class":822},[812,1945,1946,1949,1951],{"class":814,"line":1129},[812,1947,1948],{"class":822},"      }",[812,1950,1308],{"class":896},[812,1952,833],{"class":822},[812,1954,1955,1957,1959],{"class":814,"line":1146},[812,1956,1447],{"class":822},[812,1958,1308],{"class":896},[812,1960,833],{"class":822},[812,1962,1963,1965],{"class":814,"line":1165},[812,1964,1457],{"class":822},[812,1966,1206],{"class":896},[812,1968,1969],{"class":814,"line":1209},[812,1970,931],{"class":822},[779,1972,1974],{"id":1973},"know-which-config-wins","Know which config wins",[583,1976,1977,1979],{},[625,1978,704],{}," walks the standard chain so users get the same configuration UX as built-in adapters:",[1981,1982,1983,1989,1995,2001],"ol",{},[670,1984,1985,1986,1988],{},"Explicit ",[625,1987,1092],{}," passed to your factory",[670,1990,1991,1994],{},[625,1992,1993],{},"runtimeConfig.evlog.\u003Cnamespace>"," (Nuxt\u002FNitro)",[670,1996,1997,2000],{},[625,1998,1999],{},"runtimeConfig.\u003Cnamespace>"," (legacy Nuxt\u002FNitro)",[670,2002,2003,2006,2007,2010,2011,2014,2015,2017,2018,1308],{},[625,2004,2005],{},"\u003CNS>_\u003CFIELD>"," env vars (list ",[625,2008,2009],{},"NUXT_\u003CNS>_\u003CFIELD>"," in ",[625,2012,2013],{},"ConfigField.env"," for silent Nuxt compat; show only ",[625,2016,2005],{}," in error messages via ",[625,2019,2020],{},"formatPublicEnvKeys",[583,2022,2023,2024,724,2026,724,2028,724,2030,2032,2033,2035,2036,2038,2039,2042,2043,2046,2047,2050],{},"Field names should follow the project conventions: ",[625,2025,715],{},[625,2027,719],{},[625,2029,723],{},[625,2031,727],{},". If you're renaming an existing field (e.g. ",[625,2034,1672],{}," → ",[625,2037,715],{},"), keep both as ",[625,2040,2041],{},"ConfigField"," entries for one major version. See ",[625,2044,2045],{},"axiom.ts"," and ",[625,2048,2049],{},"better-stack.ts"," for the deprecation pattern.",[779,2052,2054],{"id":2053},"wire-the-drain-into-your-framework","Wire the drain into your framework",[583,2056,2057,2058,2061],{},"Once ",[625,2059,2060],{},"createMyServiceDrain()"," returns the drain, wire it like any other:",[2063,2064,2065,2178,2304,2362,2399,2430],"code-group",{},[802,2066,2069],{"className":804,"code":2067,"filename":2068,"language":807,"meta":808,"style":808},"\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",[625,2070,2071,2077,2096,2100,2114,2118,2141,2172],{"__ignoreMap":808},[812,2072,2073],{"class":814,"line":815},[812,2074,2076],{"class":2075},"sHwdD","\u002F\u002F server\u002Fplugins\u002Fevlog-drain.ts\n",[812,2078,2079,2081,2083,2085,2087,2089,2091,2094],{"class":814,"line":826},[812,2080,819],{"class":818},[812,2082,1510],{"class":822},[812,2084,1085],{"class":829},[812,2086,1515],{"class":822},[812,2088,861],{"class":818},[812,2090,864],{"class":822},[812,2092,2093],{"class":867},"~\u002Fserver\u002Futils\u002Fmy-drain",[812,2095,870],{"class":822},[812,2097,2098],{"class":814,"line":836},[812,2099,877],{"emptyLinePlaceholder":876},[812,2101,2102,2104,2107,2109,2111],{"class":814,"line":844},[812,2103,942],{"class":883},[812,2105,2106],{"class":829}," drain ",[812,2108,964],{"class":822},[812,2110,1085],{"class":1084},[812,2112,2113],{"class":829},"()\n",[812,2115,2116],{"class":814,"line":855},[812,2117,877],{"emptyLinePlaceholder":876},[812,2119,2120,2122,2125,2128,2130,2132,2135,2137,2139],{"class":814,"line":873},[812,2121,1078],{"class":818},[812,2123,2124],{"class":818}," default",[812,2126,2127],{"class":1084}," defineNitroPlugin",[812,2129,1088],{"class":829},[812,2131,1088],{"class":822},[812,2133,2134],{"class":1091},"nitroApp",[812,2136,1308],{"class":822},[812,2138,1160],{"class":883},[812,2140,823],{"class":822},[812,2142,2143,2146,2148,2151,2153,2156,2158,2160,2163,2165,2167,2170],{"class":814,"line":880},[812,2144,2145],{"class":829},"  nitroApp",[812,2147,1224],{"class":822},[812,2149,2150],{"class":829},"hooks",[812,2152,1224],{"class":822},[812,2154,2155],{"class":1084},"hook",[812,2157,1088],{"class":896},[812,2159,985],{"class":822},[812,2161,2162],{"class":867},"evlog:drain",[812,2164,985],{"class":822},[812,2166,988],{"class":822},[812,2168,2169],{"class":829}," drain",[812,2171,1206],{"class":896},[812,2173,2174,2176],{"class":814,"line":893},[812,2175,858],{"class":822},[812,2177,1206],{"class":829},[802,2179,2181],{"className":804,"code":2180,"filename":245,"language":807,"meta":808,"style":808},"\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",[625,2182,2183,2188,2208,2227,2231,2268,2284,2298],{"__ignoreMap":808},[812,2184,2185],{"class":814,"line":815},[812,2186,2187],{"class":2075},"\u002F\u002F lib\u002Fevlog.ts\n",[812,2189,2190,2192,2194,2197,2199,2201,2203,2206],{"class":814,"line":826},[812,2191,819],{"class":818},[812,2193,1510],{"class":822},[812,2195,2196],{"class":829}," createEvlog",[812,2198,1515],{"class":822},[812,2200,861],{"class":818},[812,2202,864],{"class":822},[812,2204,2205],{"class":867},"evlog\u002Fnext",[812,2207,870],{"class":822},[812,2209,2210,2212,2214,2216,2218,2220,2222,2225],{"class":814,"line":836},[812,2211,819],{"class":818},[812,2213,1510],{"class":822},[812,2215,1085],{"class":829},[812,2217,1515],{"class":822},[812,2219,861],{"class":818},[812,2221,864],{"class":822},[812,2223,2224],{"class":867},".\u002Fmy-drain",[812,2226,870],{"class":822},[812,2228,2229],{"class":814,"line":844},[812,2230,877],{"emptyLinePlaceholder":876},[812,2232,2233,2235,2238,2240,2243,2245,2248,2250,2253,2255,2258,2260,2262,2264,2266],{"class":814,"line":855},[812,2234,1078],{"class":818},[812,2236,2237],{"class":883}," const",[812,2239,1510],{"class":822},[812,2241,2242],{"class":829}," withEvlog",[812,2244,988],{"class":822},[812,2246,2247],{"class":829}," useLogger",[812,2249,988],{"class":822},[812,2251,2252],{"class":829}," log",[812,2254,988],{"class":822},[812,2256,2257],{"class":829}," createError ",[812,2259,858],{"class":822},[812,2261,1174],{"class":822},[812,2263,2196],{"class":1084},[812,2265,1088],{"class":829},[812,2267,1126],{"class":822},[812,2269,2270,2273,2275,2277,2280,2282],{"class":814,"line":873},[812,2271,2272],{"class":896},"  service",[812,2274,900],{"class":822},[812,2276,864],{"class":822},[812,2278,2279],{"class":867},"my-app",[812,2281,985],{"class":822},[812,2283,833],{"class":822},[812,2285,2286,2289,2291,2293,2296],{"class":814,"line":880},[812,2287,2288],{"class":896},"  drain",[812,2290,900],{"class":822},[812,2292,1085],{"class":1084},[812,2294,2295],{"class":829},"()",[812,2297,833],{"class":822},[812,2299,2300,2302],{"class":814,"line":893},[812,2301,858],{"class":822},[812,2303,1206],{"class":829},[802,2305,2308],{"className":804,"code":2306,"filename":2307,"language":807,"meta":808,"style":808},"import { createMyServiceDrain } from '.\u002Fmy-drain'\napp.use(evlog({ drain: createMyServiceDrain() }))\n","Hono \u002F Express \u002F Elysia",[625,2309,2310,2328],{"__ignoreMap":808},[812,2311,2312,2314,2316,2318,2320,2322,2324,2326],{"class":814,"line":815},[812,2313,819],{"class":818},[812,2315,1510],{"class":822},[812,2317,1085],{"class":829},[812,2319,1515],{"class":822},[812,2321,861],{"class":818},[812,2323,864],{"class":822},[812,2325,2224],{"class":867},[812,2327,870],{"class":822},[812,2329,2330,2333,2335,2338,2340,2343,2345,2348,2350,2352,2354,2357,2359],{"class":814,"line":826},[812,2331,2332],{"class":829},"app",[812,2334,1224],{"class":822},[812,2336,2337],{"class":1084},"use",[812,2339,1088],{"class":829},[812,2341,2342],{"class":1084},"evlog",[812,2344,1088],{"class":829},[812,2346,2347],{"class":822},"{",[812,2349,2169],{"class":896},[812,2351,900],{"class":822},[812,2353,1085],{"class":1084},[812,2355,2356],{"class":829},"() ",[812,2358,858],{"class":822},[812,2360,2361],{"class":829},"))\n",[802,2363,2365],{"className":804,"code":2364,"filename":280,"language":807,"meta":808,"style":808},"await app.register(evlog, { drain: createMyServiceDrain() })\n",[625,2366,2367],{"__ignoreMap":808},[812,2368,2369,2372,2375,2377,2380,2383,2385,2387,2389,2391,2393,2395,2397],{"class":814,"line":815},[812,2370,2371],{"class":818},"await",[812,2373,2374],{"class":829}," app",[812,2376,1224],{"class":822},[812,2378,2379],{"class":1084},"register",[812,2381,2382],{"class":829},"(evlog",[812,2384,988],{"class":822},[812,2386,1510],{"class":822},[812,2388,2169],{"class":896},[812,2390,900],{"class":822},[812,2392,1085],{"class":1084},[812,2394,2356],{"class":829},[812,2396,858],{"class":822},[812,2398,1206],{"class":829},[802,2400,2402],{"className":804,"code":2401,"filename":265,"language":807,"meta":808,"style":808},"EvlogModule.forRoot({ drain: createMyServiceDrain() })\n",[625,2403,2404],{"__ignoreMap":808},[812,2405,2406,2409,2411,2414,2416,2418,2420,2422,2424,2426,2428],{"class":814,"line":815},[812,2407,2408],{"class":829},"EvlogModule",[812,2410,1224],{"class":822},[812,2412,2413],{"class":1084},"forRoot",[812,2415,1088],{"class":829},[812,2417,2347],{"class":822},[812,2419,2169],{"class":896},[812,2421,900],{"class":822},[812,2423,1085],{"class":1084},[812,2425,2356],{"class":829},[812,2427,858],{"class":822},[812,2429,1206],{"class":829},[802,2431,2433],{"className":804,"code":2432,"filename":300,"language":807,"meta":808,"style":808},"import { initLogger } from 'evlog'\nimport { createMyServiceDrain } from '.\u002Fmy-drain'\n\ninitLogger({ drain: createMyServiceDrain() })\n",[625,2434,2435,2454,2472,2476],{"__ignoreMap":808},[812,2436,2437,2439,2441,2444,2446,2448,2450,2452],{"class":814,"line":815},[812,2438,819],{"class":818},[812,2440,1510],{"class":822},[812,2442,2443],{"class":829}," initLogger",[812,2445,1515],{"class":822},[812,2447,861],{"class":818},[812,2449,864],{"class":822},[812,2451,2342],{"class":867},[812,2453,870],{"class":822},[812,2455,2456,2458,2460,2462,2464,2466,2468,2470],{"class":814,"line":826},[812,2457,819],{"class":818},[812,2459,1510],{"class":822},[812,2461,1085],{"class":829},[812,2463,1515],{"class":822},[812,2465,861],{"class":818},[812,2467,864],{"class":822},[812,2469,2224],{"class":867},[812,2471,870],{"class":822},[812,2473,2474],{"class":814,"line":836},[812,2475,877],{"emptyLinePlaceholder":876},[812,2477,2478,2481,2483,2485,2487,2489,2491,2493,2495],{"class":814,"line":844},[812,2479,2480],{"class":1084},"initLogger",[812,2482,1088],{"class":829},[812,2484,2347],{"class":822},[812,2486,2169],{"class":896},[812,2488,900],{"class":822},[812,2490,1085],{"class":1084},[812,2492,2356],{"class":829},[812,2494,858],{"class":822},[812,2496,1206],{"class":829},[583,2498,2499,2500,2504],{},"For production, wrap it once in ",[592,2501,2502],{"href":509},[625,2503,763],{}," so events are batched and retried.",[779,2506,2508],{"id":2507},"filter-or-transform-before-sending","Filter or transform before sending",[583,2510,2511,2513,2514,2517,2518,2520],{},[625,2512,796],{}," receives the full batch of ",[625,2515,2516],{},"WideEvent[]"," plus the resolved config. Filter or transform inline, and returning ",[625,2519,741],{}," is a clean opt-out for that batch:",[802,2522,2524],{"className":804,"code":2523,"language":807,"meta":808,"style":808},"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",[625,2525,2526,2547,2607,2634,2638,2663,2695,2717,2781,2787,2791,2797,2821,2846,2868,2873],{"__ignoreMap":808},[812,2527,2528,2531,2533,2535,2537,2539,2541,2543,2545],{"class":814,"line":815},[812,2529,2530],{"class":887},"encode",[812,2532,900],{"class":822},[812,2534,1215],{"class":822},[812,2536,1301],{"class":1091},[812,2538,988],{"class":822},[812,2540,1171],{"class":1091},[812,2542,1308],{"class":822},[812,2544,1160],{"class":883},[812,2546,823],{"class":822},[812,2548,2549,2552,2555,2557,2559,2561,2564,2566,2568,2570,2572,2574,2576,2579,2581,2583,2585,2588,2590,2592,2595,2598,2600,2603,2605],{"class":814,"line":826},[812,2550,2551],{"class":883},"  const",[812,2553,2554],{"class":829}," filtered",[812,2556,1174],{"class":822},[812,2558,1820],{"class":829},[812,2560,1224],{"class":822},[812,2562,2563],{"class":1084},"filter",[812,2565,1088],{"class":896},[812,2567,1829],{"class":1091},[812,2569,1160],{"class":883},[812,2571,1852],{"class":829},[812,2573,1224],{"class":822},[812,2575,1871],{"class":829},[812,2577,2578],{"class":822}," ===",[812,2580,864],{"class":822},[812,2582,1242],{"class":867},[812,2584,985],{"class":822},[812,2586,2587],{"class":822}," &&",[812,2589,1852],{"class":829},[812,2591,1224],{"class":822},[812,2593,2594],{"class":829},"path",[812,2596,2597],{"class":822}," !==",[812,2599,864],{"class":822},[812,2601,2602],{"class":867},"\u002Fhealth",[812,2604,985],{"class":822},[812,2606,1206],{"class":896},[812,2608,2609,2612,2614,2617,2619,2622,2624,2627,2629,2632],{"class":814,"line":836},[812,2610,2611],{"class":818},"  if",[812,2613,1215],{"class":896},[812,2615,2616],{"class":829},"filtered",[812,2618,1224],{"class":822},[812,2620,2621],{"class":829},"length",[812,2623,2578],{"class":822},[812,2625,2626],{"class":1913}," 0",[812,2628,1229],{"class":896},[812,2630,2631],{"class":818},"return",[812,2633,1262],{"class":822},[812,2635,2636],{"class":814,"line":844},[812,2637,877],{"emptyLinePlaceholder":876},[812,2639,2640,2642,2645,2647,2649,2651,2653,2655,2657,2659,2661],{"class":814,"line":855},[812,2641,2551],{"class":883},[812,2643,2644],{"class":829}," payload",[812,2646,1174],{"class":822},[812,2648,2554],{"class":829},[812,2650,1224],{"class":822},[812,2652,99],{"class":1084},[812,2654,1088],{"class":896},[812,2656,1829],{"class":1091},[812,2658,1160],{"class":883},[812,2660,1215],{"class":896},[812,2662,1126],{"class":822},[812,2664,2665,2668,2670,2673,2676,2678,2680,2682,2684,2686,2688,2691,2693],{"class":814,"line":873},[812,2666,2667],{"class":896},"    ts",[812,2669,900],{"class":822},[812,2671,2672],{"class":822}," new",[812,2674,2675],{"class":1084}," Date",[812,2677,1088],{"class":896},[812,2679,1829],{"class":829},[812,2681,1224],{"class":822},[812,2683,1905],{"class":829},[812,2685,1308],{"class":896},[812,2687,1224],{"class":822},[812,2689,2690],{"class":1084},"getTime",[812,2692,2295],{"class":896},[812,2694,833],{"class":822},[812,2696,2697,2700,2702,2704,2706,2708,2710,2713,2715],{"class":814,"line":880},[812,2698,2699],{"class":896},"    severity",[812,2701,900],{"class":822},[812,2703,1852],{"class":829},[812,2705,1224],{"class":822},[812,2707,1871],{"class":829},[812,2709,1224],{"class":822},[812,2711,2712],{"class":1084},"toUpperCase",[812,2714,2295],{"class":896},[812,2716,833],{"class":822},[812,2718,2719,2722,2724,2726,2729,2731,2733,2735,2738,2740,2743,2745,2747,2749,2751,2753,2756,2758,2760,2762,2765,2767,2770,2772,2774,2776,2779],{"class":814,"line":893},[812,2720,2721],{"class":896},"    attributes",[812,2723,900],{"class":822},[812,2725,1510],{"class":822},[812,2727,2728],{"class":896}," method",[812,2730,900],{"class":822},[812,2732,1852],{"class":829},[812,2734,1224],{"class":822},[812,2736,2737],{"class":829},"method",[812,2739,988],{"class":822},[812,2741,2742],{"class":896}," path",[812,2744,900],{"class":822},[812,2746,1852],{"class":829},[812,2748,1224],{"class":822},[812,2750,2594],{"class":829},[812,2752,988],{"class":822},[812,2754,2755],{"class":896}," status",[812,2757,900],{"class":822},[812,2759,1852],{"class":829},[812,2761,1224],{"class":822},[812,2763,2764],{"class":829},"status",[812,2766,988],{"class":822},[812,2768,2769],{"class":896}," durationMs",[812,2771,900],{"class":822},[812,2773,1852],{"class":829},[812,2775,1224],{"class":822},[812,2777,2778],{"class":829},"durationMs",[812,2780,1061],{"class":822},[812,2782,2783,2785],{"class":814,"line":906},[812,2784,1457],{"class":822},[812,2786,2361],{"class":896},[812,2788,2789],{"class":814,"line":917},[812,2790,877],{"emptyLinePlaceholder":876},[812,2792,2793,2795],{"class":814,"line":928},[812,2794,1112],{"class":818},[812,2796,823],{"class":822},[812,2798,2799,2802,2804,2806,2808,2810,2812,2814,2817,2819],{"class":814,"line":934},[812,2800,2801],{"class":896},"    url",[812,2803,900],{"class":822},[812,2805,1325],{"class":822},[812,2807,1221],{"class":829},[812,2809,1224],{"class":822},[812,2811,719],{"class":829},[812,2813,858],{"class":822},[812,2815,2816],{"class":867},"\u002Fv1\u002Fpush",[812,2818,1349],{"class":822},[812,2820,833],{"class":822},[812,2822,2823,2826,2828,2830,2832,2834,2836,2838,2840,2842,2844],{"class":814,"line":939},[812,2824,2825],{"class":896},"    headers",[812,2827,900],{"class":822},[812,2829,1510],{"class":822},[812,2831,864],{"class":822},[812,2833,1370],{"class":896},[812,2835,985],{"class":822},[812,2837,900],{"class":822},[812,2839,864],{"class":822},[812,2841,1379],{"class":867},[812,2843,985],{"class":822},[812,2845,1061],{"class":822},[812,2847,2848,2851,2853,2855,2857,2859,2861,2864,2866],{"class":814,"line":970},[812,2849,2850],{"class":896},"    body",[812,2852,900],{"class":822},[812,2854,1428],{"class":829},[812,2856,1224],{"class":822},[812,2858,1433],{"class":1084},[812,2860,1088],{"class":896},[812,2862,2863],{"class":829},"payload",[812,2865,1308],{"class":896},[812,2867,833],{"class":822},[812,2869,2870],{"class":814,"line":1012},[812,2871,2872],{"class":822},"  }\n",[812,2874,2875],{"class":814,"line":1046},[812,2876,931],{"class":822},[779,2878,2880,2882],{"id":2879},"definedrain-non-http-transports",[625,2881,649],{}," (non-HTTP transports)",[583,2884,2885,2886,2888],{},"If your destination requires gRPC, a vendor SDK, a queue client, a WebSocket, or a raw socket, drop one level lower with ",[625,2887,649],{},". You own the transport; the toolkit still gives you config resolution, error isolation, and a consistent shape.",[802,2890,2892],{"className":804,"code":2891,"language":807,"meta":808,"style":808},"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",[625,2893,2894,2913,2917,2933,2953,2968,3007,3030,3065,3069],{"__ignoreMap":808},[812,2895,2896,2898,2900,2903,2905,2907,2909,2911],{"class":814,"line":815},[812,2897,819],{"class":818},[812,2899,1510],{"class":822},[812,2901,2902],{"class":829}," defineDrain",[812,2904,1515],{"class":822},[812,2906,861],{"class":818},[812,2908,864],{"class":822},[812,2910,655],{"class":867},[812,2912,870],{"class":822},[812,2914,2915],{"class":814,"line":826},[812,2916,877],{"emptyLinePlaceholder":876},[812,2918,2919,2921,2923,2926,2928,2930],{"class":814,"line":836},[812,2920,1078],{"class":818},[812,2922,2237],{"class":883},[812,2924,2925],{"class":829}," createCustomTransportDrain ",[812,2927,964],{"class":822},[812,2929,1157],{"class":822},[812,2931,2932],{"class":883}," =>\n",[812,2934,2935,2938,2940,2943,2945,2947,2949,2951],{"class":814,"line":844},[812,2936,2937],{"class":1084},"  defineDrain",[812,2939,1575],{"class":822},[812,2941,2942],{"class":896}," apiKey",[812,2944,900],{"class":822},[812,2946,1552],{"class":887},[812,2948,1592],{"class":822},[812,2950,1088],{"class":829},[812,2952,1126],{"class":822},[812,2954,2955,2957,2959,2961,2964,2966],{"class":814,"line":855},[812,2956,1132],{"class":896},[812,2958,900],{"class":822},[812,2960,864],{"class":822},[812,2962,2963],{"class":867},"custom",[812,2965,985],{"class":822},[812,2967,833],{"class":822},[812,2969,2970,2972,2974,2976,2978,2980,2982,2984,2986,2988,2990,2992,2994,2996,2999,3001,3003,3005],{"class":814,"line":873},[812,2971,1149],{"class":1084},[812,2973,900],{"class":822},[812,2975,1154],{"class":883},[812,2977,1157],{"class":822},[812,2979,1160],{"class":883},[812,2981,1215],{"class":829},[812,2983,2347],{"class":822},[812,2985,2942],{"class":896},[812,2987,900],{"class":822},[812,2989,1645],{"class":829},[812,2991,1224],{"class":822},[812,2993,1650],{"class":829},[812,2995,1224],{"class":822},[812,2997,2998],{"class":829},"MY_KEY",[812,3000,1218],{"class":822},[812,3002,1515],{"class":822},[812,3004,1308],{"class":829},[812,3006,833],{"class":822},[812,3008,3009,3012,3014,3016,3018,3020,3022,3024,3026,3028],{"class":814,"line":880},[812,3010,3011],{"class":1084},"    send",[812,3013,900],{"class":822},[812,3015,1154],{"class":883},[812,3017,1215],{"class":822},[812,3019,1301],{"class":1091},[812,3021,988],{"class":822},[812,3023,1171],{"class":1091},[812,3025,1308],{"class":822},[812,3027,1160],{"class":883},[812,3029,823],{"class":822},[812,3031,3032,3035,3038,3040,3043,3045,3047,3049,3051,3053,3055,3057,3059,3061,3063],{"class":814,"line":893},[812,3033,3034],{"class":818},"      await",[812,3036,3037],{"class":829}," myVendorSdk",[812,3039,1224],{"class":822},[812,3041,3042],{"class":1084},"publish",[812,3044,1088],{"class":896},[812,3046,1301],{"class":829},[812,3048,988],{"class":822},[812,3050,1510],{"class":822},[812,3052,1557],{"class":896},[812,3054,900],{"class":822},[812,3056,1171],{"class":829},[812,3058,1224],{"class":822},[812,3060,715],{"class":829},[812,3062,1515],{"class":822},[812,3064,1206],{"class":896},[812,3066,3067],{"class":814,"line":906},[812,3068,1288],{"class":822},[812,3070,3071,3073],{"class":814,"line":917},[812,3072,1457],{"class":822},[812,3074,1206],{"class":829},[583,3076,3077,3078,3081,3082,3084,3085,3087,3088,3091,3092,3095,3096,3098],{},"Let ",[625,3079,3080],{},"send"," throw on failure. ",[625,3083,649],{}," handles the isolation: a direct call swallows the error and logs it with your drain's name, while the ",[625,3086,1486],{}," variant on the returned function rejects, which is how ",[592,3089,3090],{"href":509},"the pipeline","'s retry and ",[625,3093,3094],{},"onDropped"," observe failures. A ",[625,3097,3080],{}," that swallows its own errors makes your drain unretryable.",[779,3100,3102],{"id":3101},"what-a-draincontext-carries","What a DrainContext carries",[583,3104,3105,3106,3108,3109,3112],{},"When evlog calls your drain through ",[625,3107,2162],{},", it passes a ",[625,3110,3111],{},"DrainContext"," per event:",[802,3114,3117],{"className":804,"code":3115,"filename":3116,"language":807,"meta":808,"style":808},"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",[625,3118,3119,3128,3133,3143,3147,3152,3161,3170,3179,3188,3192,3196,3201,3223,3227,3231,3240,3249,3290,3298,3307,3316,3325,3334,3343,3348,3368],{"__ignoreMap":808},[812,3120,3121,3123,3126],{"class":814,"line":815},[812,3122,884],{"class":883},[812,3124,3125],{"class":887}," DrainContext",[812,3127,823],{"class":822},[812,3129,3130],{"class":814,"line":826},[812,3131,3132],{"class":2075},"  \u002F** The complete wide event with all accumulated context *\u002F\n",[812,3134,3135,3138,3140],{"class":814,"line":836},[812,3136,3137],{"class":896},"  event",[812,3139,900],{"class":822},[812,3141,3142],{"class":887}," WideEvent\n",[812,3144,3145],{"class":814,"line":844},[812,3146,877],{"emptyLinePlaceholder":876},[812,3148,3149],{"class":814,"line":855},[812,3150,3151],{"class":2075},"  \u002F** Request metadata *\u002F\n",[812,3153,3154,3157,3159],{"class":814,"line":873},[812,3155,3156],{"class":896},"  request",[812,3158,912],{"class":822},[812,3160,823],{"class":822},[812,3162,3163,3166,3168],{"class":814,"line":880},[812,3164,3165],{"class":896},"    method",[812,3167,900],{"class":822},[812,3169,903],{"class":887},[812,3171,3172,3175,3177],{"class":814,"line":893},[812,3173,3174],{"class":896},"    path",[812,3176,900],{"class":822},[812,3178,903],{"class":887},[812,3180,3181,3184,3186],{"class":814,"line":906},[812,3182,3183],{"class":896},"    requestId",[812,3185,900],{"class":822},[812,3187,903],{"class":887},[812,3189,3190],{"class":814,"line":917},[812,3191,2872],{"class":822},[812,3193,3194],{"class":814,"line":928},[812,3195,877],{"emptyLinePlaceholder":876},[812,3197,3198],{"class":814,"line":934},[812,3199,3200],{"class":2075},"  \u002F** Safe HTTP headers (sensitive headers filtered) *\u002F\n",[812,3202,3203,3206,3208,3211,3213,3216,3218,3220],{"class":814,"line":939},[812,3204,3205],{"class":896},"  headers",[812,3207,912],{"class":822},[812,3209,3210],{"class":887}," Record",[812,3212,952],{"class":822},[812,3214,3215],{"class":887},"string",[812,3217,988],{"class":822},[812,3219,1552],{"class":887},[812,3221,3222],{"class":822},">\n",[812,3224,3225],{"class":814,"line":970},[812,3226,931],{"class":822},[812,3228,3229],{"class":814,"line":1012},[812,3230,877],{"emptyLinePlaceholder":876},[812,3232,3233,3235,3238],{"class":814,"line":1046},[812,3234,884],{"class":883},[812,3236,3237],{"class":887}," WideEvent",[812,3239,823],{"class":822},[812,3241,3242,3245,3247],{"class":814,"line":1064},[812,3243,3244],{"class":896},"  timestamp",[812,3246,900],{"class":822},[812,3248,903],{"class":887},[812,3250,3251,3254,3256,3258,3261,3263,3266,3268,3271,3273,3275,3277,3280,3282,3284,3286,3288],{"class":814,"line":1070},[812,3252,3253],{"class":896},"  level",[812,3255,900],{"class":822},[812,3257,864],{"class":822},[812,3259,3260],{"class":867},"debug",[812,3262,985],{"class":822},[812,3264,3265],{"class":822}," |",[812,3267,864],{"class":822},[812,3269,3270],{"class":867},"info",[812,3272,985],{"class":822},[812,3274,3265],{"class":822},[812,3276,864],{"class":822},[812,3278,3279],{"class":867},"warn",[812,3281,985],{"class":822},[812,3283,3265],{"class":822},[812,3285,864],{"class":822},[812,3287,1242],{"class":867},[812,3289,870],{"class":822},[812,3291,3292,3294,3296],{"class":814,"line":1075},[812,3293,2272],{"class":896},[812,3295,900],{"class":822},[812,3297,903],{"class":887},[812,3299,3300,3303,3305],{"class":814,"line":1109},[812,3301,3302],{"class":896},"  environment",[812,3304,912],{"class":822},[812,3306,903],{"class":887},[812,3308,3309,3312,3314],{"class":814,"line":1129},[812,3310,3311],{"class":896},"  version",[812,3313,912],{"class":822},[812,3315,903],{"class":887},[812,3317,3318,3321,3323],{"class":814,"line":1146},[812,3319,3320],{"class":896},"  region",[812,3322,912],{"class":822},[812,3324,903],{"class":887},[812,3326,3327,3330,3332],{"class":814,"line":1165},[812,3328,3329],{"class":896},"  commitHash",[812,3331,912],{"class":822},[812,3333,903],{"class":887},[812,3335,3336,3339,3341],{"class":814,"line":1209},[812,3337,3338],{"class":896},"  requestId",[812,3340,912],{"class":822},[812,3342,903],{"class":887},[812,3344,3345],{"class":814,"line":1234},[812,3346,3347],{"class":2075},"  \u002F\u002F ... plus all fields added via log.set()\n",[812,3349,3350,3353,3356,3358,3360,3363,3365],{"class":814,"line":1256},[812,3351,3352],{"class":829},"  [",[812,3354,3355],{"class":1091},"key",[812,3357,900],{"class":822},[812,3359,1552],{"class":887},[812,3361,3362],{"class":829},"]",[812,3364,900],{"class":822},[812,3366,3367],{"class":887}," unknown\n",[812,3369,3370],{"class":814,"line":1265},[812,3371,931],{"class":822},[583,3373,3374,3375,3377,3378,3381,3382,3384,3385,3388],{},"In the batched form your ",[625,3376,796],{}," \u002F ",[625,3379,3380],{},"send()"," receives, you get ",[625,3383,2516],{}," directly (the toolkit unwraps ",[625,3386,3387],{},"event"," from each context).",[779,3390,3392],{"id":3391},"reach-for-a-toolkit-helper","Reach for a toolkit helper",[583,3394,3395,3397],{},[625,3396,655],{}," exposes the same helpers every built-in adapter uses. The ones relevant to drains:",[600,3399,3400,3410],{},[603,3401,3402],{},[606,3403,3404,3407],{},[609,3405,3406],{},"Export",[609,3408,3409],{},"Purpose",[616,3411,3412,3422,3432,3444,3454,3467,3477,3491],{},[606,3413,3414,3419],{},[621,3415,3416],{},[625,3417,3418],{},"defineHttpDrain(spec)",[621,3420,3421],{},"The HTTP recipe — auto retries, timeouts, identity headers, error isolation",[606,3423,3424,3429],{},[621,3425,3426],{},[625,3427,3428],{},"defineDrain(spec)",[621,3430,3431],{},"Same contract for non-HTTP transports",[606,3433,3434,3439],{},[621,3435,3436],{},[625,3437,3438],{},"resolveAdapterConfig(ns, fields, overrides)",[621,3440,3441,3442,709],{},"Standard config priority chain (overrides → ",[625,3443,708],{},[606,3445,3446,3451],{},[621,3447,3448],{},[625,3449,3450],{},"httpPost(opts)",[621,3452,3453],{},"The retried POST helper used by every built-in HTTP adapter — handles timeout, retries, redacted error messages",[606,3455,3456,3461],{},[621,3457,3458],{},[625,3459,3460],{},"composeDrains(drains)",[621,3462,3463,3464,1308],{},"Combine multiple drains into one (errors isolated, runs concurrently with ",[625,3465,3466],{},"Promise.allSettled",[606,3468,3469,3474],{},[621,3470,3471],{},[625,3472,3473],{},"toTypedAttributeValue(value)",[621,3475,3476],{},"Convert any value to the typed attribute shape used by Axiom \u002F Sentry",[606,3478,3479,3484],{},[621,3480,3481],{},[625,3482,3483],{},"toOtlpAttributeValue(value)",[621,3485,3486,3487,3490],{},"Convert any value to the OTLP ",[625,3488,3489],{},"AnyValue"," shape (used by OTLP \u002F HyperDX \u002F PostHog logs)",[606,3492,3493,3501],{},[621,3494,3495,724,3498],{},[625,3496,3497],{},"OTEL_SEVERITY_NUMBER",[625,3499,3500],{},"OTEL_SEVERITY_TEXT",[621,3502,3503],{},"OTEL log severity tables",[779,3505,3507],{"id":3506},"identify-your-traffic-to-the-receiver","Identify your traffic to the receiver",[583,3509,3510,3512],{},[625,3511,636],{}," automatically tags every request with two headers so receivers can identify the traffic:",[600,3514,3515,3525],{},[603,3516,3517],{},[606,3518,3519,3522],{},[609,3520,3521],{},"Header",[609,3523,3524],{},"Value",[616,3526,3527,3540],{},[606,3528,3529,3534],{},[621,3530,3531],{},[625,3532,3533],{},"User-Agent",[621,3535,3536,3539],{},[625,3537,3538],{},"evlog\u002F\u003Cversion>"," (Node \u002F server runtimes only — browsers strip this header)",[606,3541,3542,3547],{},[621,3543,3544],{},[625,3545,3546],{},"X-Evlog-Source",[621,3548,3549,3550,3553],{},"The drain ",[625,3551,3552],{},"name"," you provided",[583,3555,3556,3557,3560,3561,1224],{},"If you build a drain on top of ",[625,3558,3559],{},"httpPost"," directly, you can override or suppress them. See ",[592,3562,498],{"href":499},[779,3564,3566],{"id":3565},"errors-are-already-handled-for-you","Errors are already handled for you",[583,3568,3569,3571],{},[625,3570,636],{}," enforces every best practice automatically:",[1981,3573,3574,3584,3594,3602],{},[670,3575,3576,3579,3580,3583],{},[587,3577,3578],{},"Never throws",": failures are caught and logged with the ",[625,3581,3582],{},"[evlog\u002F\u003Cname>]"," prefix.",[670,3585,3586,3589,3590,3593],{},[587,3587,3588],{},"Retries",": defaults to 2 attempts on transient errors (configurable via ",[625,3591,3592],{},"retries",").",[670,3595,3596,3599,3600,3593],{},[587,3597,3598],{},"Timeouts",": defaults to 5000ms (configurable via ",[625,3601,727],{},[670,3603,3604,3607,3608,3610,3611,3613],{},[587,3605,3606],{},"Graceful degradation",": ",[625,3609,700],{}," returning ",[625,3612,741],{}," makes the drain a no-op.",[583,3615,3616,3617,3619],{},"If you fall back to ",[625,3618,649],{},", follow the same rules manually.",[779,3621,3623],{"id":3622},"publish-it-as-a-community-package","Publish it as a community package",[583,3625,3626],{},"Recommended structure for a community drain:",[802,3628,3633],{"className":3629,"code":3631,"language":3632,"meta":808},[3630],"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",[625,3634,3631],{"__ignoreMap":808},[583,3636,3637,3638,3640,3641,3644,3645,3648],{},"Add ",[625,3639,2342],{}," as a ",[625,3642,3643],{},"peerDependency"," (not a ",[625,3646,3647],{},"dependency","), so your package will not pull in a copy of evlog at install time.",[3650,3651,3654,3655,3660],"callout",{"color":3652,"icon":3653},"neutral","i-lucide-heart","Built something great? ",[592,3656,3659],{"href":3657,"rel":3658},"https:\u002F\u002Fgithub.com\u002Fevloghq\u002Fevlog\u002Fpulls",[772],"Open a PR"," to add a row to the Adapters table. The community will thank you.",[779,3662,3664],{"id":3663},"next-steps","Next steps",[667,3666,3667,3673,3681,3687,3693],{},[670,3668,3669,3672],{},[592,3670,3671],{"href":509},"Drain Pipeline",": wrap your drain in batch + retry + fanout for production",[670,3674,3675,3678,3679],{},[592,3676,3677],{"href":153},"Adapters Overview",": see how the built-in adapters use ",[625,3680,636],{},[670,3682,3683,3686],{},[592,3684,3685],{"href":491},"Custom Enrichers",": same toolkit shape for derived event fields",[670,3688,3689,3692],{},[592,3690,3691],{"href":469},"Custom Framework Integration",": same toolkit shape for HTTP frameworks",[670,3694,3695,3697],{},[592,3696,534],{"href":535},": security and production tips",[3699,3700,3701],"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":808,"searchDepth":826,"depth":826,"links":3703},[3704,3708,3709,3710,3711,3713,3714,3715,3716,3717,3718],{"id":781,"depth":826,"text":3705,"children":3706},"defineHttpDrain (the HTTP recipe)",[3707],{"id":1491,"depth":836,"text":1492},{"id":1973,"depth":826,"text":1974},{"id":2053,"depth":826,"text":2054},{"id":2507,"depth":826,"text":2508},{"id":2879,"depth":826,"text":3712},"defineDrain (non-HTTP transports)",{"id":3101,"depth":826,"text":3102},{"id":3391,"depth":826,"text":3392},{"id":3506,"depth":826,"text":3507},{"id":3565,"depth":826,"text":3566},{"id":3622,"depth":826,"text":3623},{"id":3663,"depth":826,"text":3664},"Build a drain for any backend without a built-in adapter. Config resolution, retries, timeouts, and identity headers are handled for you.","md",[3722,3724,3726],{"label":3671,"icon":511,"to":509,"color":3652,"variant":3723},"subtle",{"label":3677,"icon":3725,"to":153,"color":3652,"variant":3723},"i-custom-plug",{"label":534,"icon":388,"to":535,"color":3652,"variant":3723},{},{"title":503,"icon":506},{"title":578,"description":3719},"XGMOW-7l8wIirfkZ15TEiwYBU1P1QsYImUOpKVss9RU",[3732,3734],{"title":498,"path":499,"stem":500,"description":3733,"icon":501,"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":508,"path":509,"stem":510,"description":3735,"icon":511,"children":-1},"The pipeline wraps every drain: it batches events, retries on failure, fans out to several destinations, and ships browser logs.",1790280247018]