TypeError [ERR_INVALID_ARG_TYPE]: The "key" argument must be one of type string, TypedArray, or DataView

Question

Trying to index some data in elasticsearch using AWS Lambda. Stack Trace

TypeError [ERR_INVALID_ARG_TYPE]: The "key" argument must be one of type string, TypedArray, or DataView at new Hmac (internal/crypto/hash.js:84:11) at Object.createHmac (crypto.js:122:10) at Object.hmac (/home/projects/serverless-todo-app/.webpack/service/src/indexer/createIndex.js:698:30) at Object.getSigningKey (/home/projects/serverless-todo-app/.webpack/service/src/indexer/createIndex.js:7109:8) at V4.signature (/home/projects/serverless-app/.webpack/service/src/indexer/createIndex.js:12708:36) at V4.authorization (/home/projects/serverless-app/.webpack/service/src/indexer/createIndex.js:12703:36) at V4.addAuthorization (/home/projects/serverless-app/.webpack/service/src/indexer/createIndex.js:12645:12) at ElasticsearchService.put (/home/projects/serverless-app/.webpack/service/src/indexer/createIndex.js:8150:12) at process (/home/projects/serverless-app/.webpack/service/src/indexer/createIndex.js:8115:24) at BbPromise (/usr/local/lib/node_modules/serverless/lib/plugins/aws/invokeLocal/index.js:567:30) at AwsInvokeLocal.invokeLocalNodeJs (/usr/local/lib/node_modules/serverless/lib/plugins/aws/invokeLocal/index.js:521:12) at AwsInvokeLocal.invokeLocal (/usr/local/lib/node_modules/serverless/lib/plugins/aws/invokeLocal/index.js:152:19) From previous event: at Object.invoke:local:invoke [as hook] (/usr/local/lib/node_modules/serverless/lib/plugins/aws/invokeLocal/index.js:34:10)

const credentials = new AWS.EnvironmentCredentials('AWS');
let signer = new AWS.Signers.V4(this.request, 'es');
signer.addAuthorization(credentials, new Date());

Trying to index some data in elastisearch using AWS Lambda.

Answer 1

You should have an endpoint and have initiated your request. You can do it like below and also check the link pasted after the code.

/* == Globals == */
var esDomain = {
    region: 'us-east-1',
    endpoint: 'my-domain-search-endpoint',
    index: 'myindex',
    doctype: 'mytype'
};
var endpoint = new AWS.Endpoint(esDomain.endpoint);
/*
 * The AWS credentials are picked up from the environment.
 * They belong to the IAM role assigned to the Lambda function.
 * Since the ES requests are signed using these credentials,
 * make sure to apply a policy that allows ES domain operations
 * to the role.
 */
var creds = new AWS.EnvironmentCredentials('AWS');

var req = new AWS.HttpRequest(endpoint);

    req.method = 'POST';
    req.path = path.join('/', esDomain.index, esDomain.doctype);
    req.region = esDomain.region;
    req.headers['presigned-expires'] = false;
    req.headers['Host'] = endpoint.host;
    req.body = doc;

    var signer = new AWS.Signers.V4(req , 'es');  // es: service code
    signer.addAuthorization(creds, new Date());

Inamazon-elasticsearch-lambda-samples check lines 45-55 (Sorry I cannot comment because of low reputation)