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Install",[654,655,656,681,695,709],"code-group",{},[657,658,664],"pre",{"className":659,"code":660,"filename":661,"language":662,"meta":663,"style":663},"language-bash shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","pnpm add evlog\n","pnpm","bash","",[540,665,666],{"__ignoreMap":663},[667,668,671,674,678],"span",{"class":669,"line":670},"line",1,[667,672,661],{"class":673},"sBMFI",[667,675,677],{"class":676},"sfazB"," add",[667,679,680],{"class":676}," evlog\n",[657,682,685],{"className":659,"code":683,"filename":684,"language":662,"meta":663,"style":663},"bun add evlog\n","bun",[540,686,687],{"__ignoreMap":663},[667,688,689,691,693],{"class":669,"line":670},[667,690,684],{"class":673},[667,692,677],{"class":676},[667,694,680],{"class":676},[657,696,699],{"className":659,"code":697,"filename":698,"language":662,"meta":663,"style":663},"yarn add evlog\n","yarn",[540,700,701],{"__ignoreMap":663},[667,702,703,705,707],{"class":669,"line":670},[667,704,698],{"class":673},[667,706,677],{"class":676},[667,708,680],{"class":676},[657,710,713],{"className":659,"code":711,"filename":712,"language":662,"meta":663,"style":663},"npm install evlog\n","npm",[540,714,715],{"__ignoreMap":663},[667,716,717,719,722],{"class":669,"line":670},[667,718,712],{"class":673},[667,720,721],{"class":676}," install",[667,723,680],{"class":676},[649,725,727],{"id":726},"_2-initialize-once-log-per-invocation","2. Initialize once, log per invocation",[657,729,734],{"className":730,"code":731,"filename":732,"language":733,"meta":663,"style":663},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","import type { SQSEvent } from 'aws-lambda'\nimport { initLogger, createLogger } from 'evlog'\n\ninitLogger({\n  env: { service: 'sqs-consumer', environment: process.env.NODE_ENV },\n})\n\nexport async function handler(event: SQSEvent) {\n  for (const record of event.Records) {\n    const log = createLogger({\n      messageId: record.messageId,\n      approximateReceiveCount: record.attributes?.ApproximateReceiveCount,\n    })\n\n    try {\n      log.set({ queue: { name: record.eventSourceARN } })\n      \u002F\u002F … parse record.body and process the message\n      log.set({ status: 'ok' })\n    } catch (error) {\n      log.error(error instanceof Error ? error : new Error(String(error)))\n      log.set({ status: 'error' })\n      throw error\n    } finally {\n      log.emit()\n    }\n  }\n}\n","src\u002Fhandler.ts","typescript",[540,735,736,768,795,802,815,864,873,878,910,941,959,977,1000,1008,1013,1021,1062,1069,1098,1115,1160,1187,1196,1206,1219,1225,1231],{"__ignoreMap":663},[667,737,738,742,745,749,753,756,759,762,765],{"class":669,"line":670},[667,739,741],{"class":740},"s7zQu","import",[667,743,744],{"class":740}," type",[667,746,748],{"class":747},"sMK4o"," {",[667,750,752],{"class":751},"sTEyZ"," SQSEvent",[667,754,755],{"class":747}," }",[667,757,758],{"class":740}," from",[667,760,761],{"class":747}," '",[667,763,764],{"class":676},"aws-lambda",[667,766,767],{"class":747},"'\n",[667,769,771,773,775,778,781,784,786,788,790,793],{"class":669,"line":770},2,[667,772,741],{"class":740},[667,774,748],{"class":747},[667,776,777],{"class":751}," initLogger",[667,779,780],{"class":747},",",[667,782,783],{"class":751}," createLogger",[667,785,755],{"class":747},[667,787,758],{"class":740},[667,789,761],{"class":747},[667,791,792],{"class":676},"evlog",[667,794,767],{"class":747},[667,796,798],{"class":669,"line":797},3,[667,799,801],{"emptyLinePlaceholder":800},true,"\n",[667,803,805,809,812],{"class":669,"line":804},4,[667,806,808],{"class":807},"s2Zo4","initLogger",[667,810,811],{"class":751},"(",[667,813,814],{"class":747},"{\n",[667,816,818,822,825,827,830,832,834,837,840,842,845,847,850,853,856,858,861],{"class":669,"line":817},5,[667,819,821],{"class":820},"swJcz","  env",[667,823,824],{"class":747},":",[667,826,748],{"class":747},[667,828,829],{"class":820}," service",[667,831,824],{"class":747},[667,833,761],{"class":747},[667,835,836],{"class":676},"sqs-consumer",[667,838,839],{"class":747},"'",[667,841,780],{"class":747},[667,843,844],{"class":820}," environment",[667,846,824],{"class":747},[667,848,849],{"class":751}," process",[667,851,852],{"class":747},".",[667,854,855],{"class":751},"env",[667,857,852],{"class":747},[667,859,860],{"class":751},"NODE_ENV ",[667,862,863],{"class":747},"},\n",[667,865,867,870],{"class":669,"line":866},6,[667,868,869],{"class":747},"}",[667,871,872],{"class":751},")\n",[667,874,876],{"class":669,"line":875},7,[667,877,801],{"emptyLinePlaceholder":800},[667,879,881,884,888,891,894,896,900,902,904,907],{"class":669,"line":880},8,[667,882,883],{"class":740},"export",[667,885,887],{"class":886},"spNyl"," async",[667,889,890],{"class":886}," function",[667,892,893],{"class":807}," handler",[667,895,811],{"class":747},[667,897,899],{"class":898},"sHdIc","event",[667,901,824],{"class":747},[667,903,752],{"class":673},[667,905,906],{"class":747},")",[667,908,909],{"class":747}," {\n",[667,911,913,916,919,922,925,928,931,933,936,939],{"class":669,"line":912},9,[667,914,915],{"class":740},"  for",[667,917,918],{"class":820}," (",[667,920,921],{"class":886},"const",[667,923,924],{"class":751}," record",[667,926,927],{"class":747}," of",[667,929,930],{"class":751}," event",[667,932,852],{"class":747},[667,934,935],{"class":751},"Records",[667,937,938],{"class":820},") ",[667,940,814],{"class":747},[667,942,944,947,950,953,955,957],{"class":669,"line":943},10,[667,945,946],{"class":886},"    const",[667,948,949],{"class":751}," log",[667,951,952],{"class":747}," =",[667,954,783],{"class":807},[667,956,811],{"class":820},[667,958,814],{"class":747},[667,960,962,965,967,969,971,974],{"class":669,"line":961},11,[667,963,964],{"class":820},"      messageId",[667,966,824],{"class":747},[667,968,924],{"class":751},[667,970,852],{"class":747},[667,972,973],{"class":751},"messageId",[667,975,976],{"class":747},",\n",[667,978,980,983,985,987,989,992,995,998],{"class":669,"line":979},12,[667,981,982],{"class":820},"      approximateReceiveCount",[667,984,824],{"class":747},[667,986,924],{"class":751},[667,988,852],{"class":747},[667,990,991],{"class":751},"attributes",[667,993,994],{"class":747},"?.",[667,996,997],{"class":751},"ApproximateReceiveCount",[667,999,976],{"class":747},[667,1001,1003,1006],{"class":669,"line":1002},13,[667,1004,1005],{"class":747},"    }",[667,1007,872],{"class":820},[667,1009,1011],{"class":669,"line":1010},14,[667,1012,801],{"emptyLinePlaceholder":800},[667,1014,1016,1019],{"class":669,"line":1015},15,[667,1017,1018],{"class":740},"    try",[667,1020,909],{"class":747},[667,1022,1024,1027,1029,1032,1034,1037,1040,1042,1044,1047,1049,1051,1053,1056,1058,1060],{"class":669,"line":1023},16,[667,1025,1026],{"class":751},"      log",[667,1028,852],{"class":747},[667,1030,1031],{"class":807},"set",[667,1033,811],{"class":820},[667,1035,1036],{"class":747},"{",[667,1038,1039],{"class":820}," queue",[667,1041,824],{"class":747},[667,1043,748],{"class":747},[667,1045,1046],{"class":820}," name",[667,1048,824],{"class":747},[667,1050,924],{"class":751},[667,1052,852],{"class":747},[667,1054,1055],{"class":751},"eventSourceARN",[667,1057,755],{"class":747},[667,1059,755],{"class":747},[667,1061,872],{"class":820},[667,1063,1065],{"class":669,"line":1064},17,[667,1066,1068],{"class":1067},"sHwdD","      \u002F\u002F … parse record.body and process the message\n",[667,1070,1072,1074,1076,1078,1080,1082,1085,1087,1089,1092,1094,1096],{"class":669,"line":1071},18,[667,1073,1026],{"class":751},[667,1075,852],{"class":747},[667,1077,1031],{"class":807},[667,1079,811],{"class":820},[667,1081,1036],{"class":747},[667,1083,1084],{"class":820}," status",[667,1086,824],{"class":747},[667,1088,761],{"class":747},[667,1090,1091],{"class":676},"ok",[667,1093,839],{"class":747},[667,1095,755],{"class":747},[667,1097,872],{"class":820},[667,1099,1101,1103,1106,1108,1111,1113],{"class":669,"line":1100},19,[667,1102,1005],{"class":747},[667,1104,1105],{"class":740}," catch",[667,1107,918],{"class":820},[667,1109,1110],{"class":751},"error",[667,1112,938],{"class":820},[667,1114,814],{"class":747},[667,1116,1118,1120,1122,1124,1126,1128,1131,1134,1137,1140,1143,1146,1148,1150,1153,1155,1157],{"class":669,"line":1117},20,[667,1119,1026],{"class":751},[667,1121,852],{"class":747},[667,1123,1110],{"class":807},[667,1125,811],{"class":820},[667,1127,1110],{"class":751},[667,1129,1130],{"class":747}," instanceof",[667,1132,1133],{"class":673}," Error",[667,1135,1136],{"class":747}," ?",[667,1138,1139],{"class":751}," error",[667,1141,1142],{"class":747}," :",[667,1144,1145],{"class":747}," new",[667,1147,1133],{"class":807},[667,1149,811],{"class":820},[667,1151,1152],{"class":807},"String",[667,1154,811],{"class":820},[667,1156,1110],{"class":751},[667,1158,1159],{"class":820},")))\n",[667,1161,1163,1165,1167,1169,1171,1173,1175,1177,1179,1181,1183,1185],{"class":669,"line":1162},21,[667,1164,1026],{"class":751},[667,1166,852],{"class":747},[667,1168,1031],{"class":807},[667,1170,811],{"class":820},[667,1172,1036],{"class":747},[667,1174,1084],{"class":820},[667,1176,824],{"class":747},[667,1178,761],{"class":747},[667,1180,1110],{"class":676},[667,1182,839],{"class":747},[667,1184,755],{"class":747},[667,1186,872],{"class":820},[667,1188,1190,1193],{"class":669,"line":1189},22,[667,1191,1192],{"class":740},"      throw",[667,1194,1195],{"class":751}," error\n",[667,1197,1199,1201,1204],{"class":669,"line":1198},23,[667,1200,1005],{"class":747},[667,1202,1203],{"class":740}," finally",[667,1205,909],{"class":747},[667,1207,1209,1211,1213,1216],{"class":669,"line":1208},24,[667,1210,1026],{"class":751},[667,1212,852],{"class":747},[667,1214,1215],{"class":807},"emit",[667,1217,1218],{"class":820},"()\n",[667,1220,1222],{"class":669,"line":1221},25,[667,1223,1224],{"class":747},"    }\n",[667,1226,1228],{"class":669,"line":1227},26,[667,1229,1230],{"class":747},"  }\n",[667,1232,1234],{"class":669,"line":1233},27,[667,1235,1236],{"class":747},"}\n",[526,1238,1239,1240,621,1243,1245],{},"If you process the whole batch as one logical unit, use a ",[530,1241,1242],{},"single",[540,1244,550],{}," per handler invocation with batch metadata instead of one logger per record.",[597,1247,1249,1250],{"id":1248},"stdout-and-silent","Stdout and ",[540,1251,1252],{},"silent",[526,1254,1255,1256,1259,1260,1263,1264,1267,1268,852],{},"Many teams ingest Lambda logs from ",[530,1257,1258],{},"CloudWatch"," via stdout. If you use a ",[530,1261,1262],{},"drain adapter"," (OTLP, Datadog, Axiom, etc.) and want JSON or platform-specific formatting without duplicate console noise, set ",[540,1265,1266],{},"silent: true"," in production—see ",[535,1269,495],{"href":1270},"\u002Freference\u002Fconfiguration#silent-mode",[657,1272,1274],{"className":730,"code":1273,"filename":732,"language":733,"meta":663,"style":663},"import { createAxiomDrain } from 'evlog\u002Faxiom'\nimport { initLogger } from 'evlog'\n\ninitLogger({\n  env: { service: 'sqs-consumer' },\n  silent: process.env.NODE_ENV === 'production',\n  drain: createAxiomDrain(),\n})\n",[540,1275,1276,1296,1314,1318,1326,1347,1376,1390],{"__ignoreMap":663},[667,1277,1278,1280,1282,1285,1287,1289,1291,1294],{"class":669,"line":670},[667,1279,741],{"class":740},[667,1281,748],{"class":747},[667,1283,1284],{"class":751}," createAxiomDrain",[667,1286,755],{"class":747},[667,1288,758],{"class":740},[667,1290,761],{"class":747},[667,1292,1293],{"class":676},"evlog\u002Faxiom",[667,1295,767],{"class":747},[667,1297,1298,1300,1302,1304,1306,1308,1310,1312],{"class":669,"line":770},[667,1299,741],{"class":740},[667,1301,748],{"class":747},[667,1303,777],{"class":751},[667,1305,755],{"class":747},[667,1307,758],{"class":740},[667,1309,761],{"class":747},[667,1311,792],{"class":676},[667,1313,767],{"class":747},[667,1315,1316],{"class":669,"line":797},[667,1317,801],{"emptyLinePlaceholder":800},[667,1319,1320,1322,1324],{"class":669,"line":804},[667,1321,808],{"class":807},[667,1323,811],{"class":751},[667,1325,814],{"class":747},[667,1327,1328,1330,1332,1334,1336,1338,1340,1342,1344],{"class":669,"line":817},[667,1329,821],{"class":820},[667,1331,824],{"class":747},[667,1333,748],{"class":747},[667,1335,829],{"class":820},[667,1337,824],{"class":747},[667,1339,761],{"class":747},[667,1341,836],{"class":676},[667,1343,839],{"class":747},[667,1345,1346],{"class":747}," },\n",[667,1348,1349,1352,1354,1356,1358,1360,1362,1364,1367,1369,1372,1374],{"class":669,"line":866},[667,1350,1351],{"class":820},"  silent",[667,1353,824],{"class":747},[667,1355,849],{"class":751},[667,1357,852],{"class":747},[667,1359,855],{"class":751},[667,1361,852],{"class":747},[667,1363,860],{"class":751},[667,1365,1366],{"class":747},"===",[667,1368,761],{"class":747},[667,1370,1371],{"class":676},"production",[667,1373,839],{"class":747},[667,1375,976],{"class":747},[667,1377,1378,1381,1383,1385,1388],{"class":669,"line":875},[667,1379,1380],{"class":820},"  drain",[667,1382,824],{"class":747},[667,1384,1284],{"class":807},[667,1386,1387],{"class":751},"()",[667,1389,976],{"class":747},[667,1391,1392,1394],{"class":669,"line":880},[667,1393,869],{"class":747},[667,1395,872],{"class":751},[1397,1398,1401,1402,1404,1405,1408],"callout",{"color":1399,"icon":1400},"warning","i-lucide-alert-triangle","If ",[540,1403,1252],{}," is enabled without a ",[540,1406,1407],{},"drain",", events may not be visible anywhere. See the configuration docs for details.",[597,1410,1412],{"id":1411},"error-handling","Error handling",[526,1414,1415,1416,1419,1420,1423,1424,1423,1427,1430],{},"Use ",[540,1417,1418],{},"createError"," where you want structured fields (",[540,1421,1422],{},"why",", ",[540,1425,1426],{},"fix",[540,1428,1429],{},"link","). Map failures to your Lambda return or rethrow so SQS retry\u002FDLQ behavior stays correct—evlog does not replace AWS error semantics.",[657,1432,1434],{"className":730,"code":1433,"filename":732,"language":733,"meta":663,"style":663},"import { createError } from 'evlog'\n\nthrow createError({\n  message: 'Invalid payload',\n  status: 400,\n  why: 'Required field missing',\n  fix: 'Include orderId in the message body',\n})\n",[540,1435,1436,1455,1459,1470,1486,1499,1515,1531],{"__ignoreMap":663},[667,1437,1438,1440,1442,1445,1447,1449,1451,1453],{"class":669,"line":670},[667,1439,741],{"class":740},[667,1441,748],{"class":747},[667,1443,1444],{"class":751}," createError",[667,1446,755],{"class":747},[667,1448,758],{"class":740},[667,1450,761],{"class":747},[667,1452,792],{"class":676},[667,1454,767],{"class":747},[667,1456,1457],{"class":669,"line":770},[667,1458,801],{"emptyLinePlaceholder":800},[667,1460,1461,1464,1466,1468],{"class":669,"line":797},[667,1462,1463],{"class":740},"throw",[667,1465,1444],{"class":807},[667,1467,811],{"class":751},[667,1469,814],{"class":747},[667,1471,1472,1475,1477,1479,1482,1484],{"class":669,"line":804},[667,1473,1474],{"class":820},"  message",[667,1476,824],{"class":747},[667,1478,761],{"class":747},[667,1480,1481],{"class":676},"Invalid payload",[667,1483,839],{"class":747},[667,1485,976],{"class":747},[667,1487,1488,1491,1493,1497],{"class":669,"line":817},[667,1489,1490],{"class":820},"  status",[667,1492,824],{"class":747},[667,1494,1496],{"class":1495},"sbssI"," 400",[667,1498,976],{"class":747},[667,1500,1501,1504,1506,1508,1511,1513],{"class":669,"line":866},[667,1502,1503],{"class":820},"  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