diff --git a/SecretsManagerRotationTemplate/lambda_function.ts b/SecretsManagerRotationTemplate/lambda_function.ts
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+++ b/SecretsManagerRotationTemplate/lambda_function.ts
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+import * as AWS from "aws-sdk";
+
+/**
+ * This is a template for creating an AWS Secrets Manager rotation lambda
+ * Mostly a translation of https://github.com/aws-samples/aws-secrets-manager-rotation-lambdas/blob/master/SecretsManagerRotationTemplate/lambda_function.py
+ *
+ * @summary Secrets Manager Rotation Template
+ * @param {string} event Lambda dictionary of event parameters. These keys must include the following:
+ *          - SecretId: The secret ARN or identifier
+ *          - ClientRequestToken: The ClientRequestToken of the secret version
+ *          - Step: The rotation step (one of createSecret, setSecret, testSecret, or finishSecret)
+ * @param {LambdaContext} context The Lambda runtime information
+ *
+ * @throws {ValueError} If the secret is not properly configured for rotation
+ * @throws {AWS.AWSError} If the secret with the specified arn and stage does not exist
+ */
+exports.handler = async (event: any, context: any, callback: any) => {
+  const parsedEvent = JSON.parse(event);
+  const arn = parsedEvent.SecretId;
+  const token = parsedEvent.ClientRequestToken;
+  const step = parsedEvent.Step;
+
+  // Setup the client
+  const secretsClient = new AWS.SecretsManager();
+
+  // Make sure the version is staged correctly
+  const metadata = await secretsClient
+    .describeSecret({
+      SecretId: arn,
+    })
+    .promise();
+
+  if (!metadata["RotationEnabled"]) {
+    console.log(`Secret ${arn} is not enabled for rotation`);
+    const error = new ValueError(`Secret ${arn} is not enabled for rotation`);
+  }
+
+  const versions = metadata.VersionIdsToStages;
+  if (!versions[token]) {
+    console.log(
+      `Secret version ${token} has no stage for rotation of secret ${arn}.`
+    );
+    throw new ValueError(
+      `Secret version ${token} has no stage for rotation of secret ${arn}.`
+    );
+  }
+
+  if (versions[token].find((v) => v === "AWSCURRENT")) {
+    console.log(
+      `Secret version ${token} already set as AWSCURRENT for secret ${arn}.`
+    );
+    return;
+  } else if (!versions[token].find((v) => v === "AWSPENDING")) {
+    console.log(
+      `Secret version ${token} not set as AWSPENDING for rotation of secret ${arn}.`
+    );
+    throw new ValueError(
+      `Secret version ${token} not set as AWSPENDING for rotation of secret ${arn}.`
+    );
+  }
+
+  switch (step) {
+    case "createSecret":
+      await createSecret(secretsClient, arn, token);
+      return;
+    case "setSecret":
+      await setSecret(secretsClient, arn, token);
+      return;
+    case "testSecret":
+      await testSecret(secretsClient, arn, token);
+      return;
+    case "finishSecret":
+      await finishSecret(secretsClient, arn, token);
+      return;
+  }
+
+  throw new ValueError("Invalid step parameter");
+};
+
+/**
+ * This method first checks for the existence of a secret for the passed in token. If one does not exist, it will generate a
+ * new secret and put it with the passed in token.
+ *
+ * @summary Create the secret
+ * @param {AWS.SecretsManager} secretsClient The secrets manager service client
+ * @param {string} arn The secret ARN or other identifier
+ * @param {string} token The ClientRequestToken associated with the secret version
+ * @throws {AWS.AWSError} If the secret with the specified arn and stage does not exist
+ */
+async function createSecret(
+  secretsClient: AWS.SecretsManager,
+  arn: string,
+  token: string
+) {
+  // Make sure the current secret exists
+  await secretsClient
+    .getSecretValue({
+      SecretId: arn,
+      VersionStage: "AWSCURRENT",
+    })
+    .promise();
+
+  // Now try to get the secret version, if that fails, put a new secret
+  try {
+    await secretsClient.getSecretValue({
+      SecretId: arn,
+      VersionId: token,
+      VersionStage: "AWSPENDING",
+    });
+    console.log(`createSecret: Successfully retrieved secret for ${arn}.`);
+  } catch (e) {
+    // Get exclude characters from environment variable
+    const ExcludeCharacters = process.env.EXCLUDE_CHARACTERS || "/@\"'\\";
+    // Generate a random password
+    const password = await secretsClient
+      .getRandomPassword({
+        ExcludeCharacters,
+      })
+      .promise();
+
+    // Put the secret
+    secretsClient
+      .putSecretValue({
+        SecretId: arn,
+        ClientRequestToken: token,
+        SecretString: password.RandomPassword,
+        VersionStages: ["AWSPENDING"],
+      })
+      .promise();
+    console.log(
+      `createSecret: Successfully put secret for ARN ${arn} and version ${token}.`
+    );
+  }
+}
+
+/**
+ * This method should set the AWSPENDING secret in the service that the secret belongs to. For example, if the secret is a database
+ * credential, this method should take the value of the AWSPENDING secret and set the user's password to this value in the database.
+ *
+ * @summary Set the secret
+ * @param {AWS.SecretsManager} secretsClient - The secrets manager service client
+ * @param {string} arn - The secret ARN or other identifier
+ * @param {string} token - The ClientRequestToken associated with the secret version
+ */
+function setSecret(
+  secretsClient: AWS.SecretsManager,
+  arn: string,
+  token: string
+) {
+  // This is where the secret should be set in the service
+  throw new NotImplementedError();
+}
+
+/**
+ * This method should validate that the AWSPENDING secret works in the service that the secret belongs to. For example, if the secret
+ * is a database credential, this method should validate that the user can login with the password in AWSPENDING and that the user has
+ * all of the expected permissions against the database.
+ *
+ * @summary Test the secret
+ * @param {AWS.SecretsManager} secretsClient - The secrets manager service client
+ * @param {string} arn - The secret ARN or other identifier
+ * @param {string} token - The ClientRequestToken associated with the secret version
+ */
+function testSecret(
+  secretsClient: AWS.SecretsManager,
+  arn: string,
+  token: string
+) {
+  // This is where the secret should be tested against the service
+  throw new NotImplementedError();
+}
+
+/**
+ * This method finalizes the rotation process by marking the secret version passed in as the AWSCURRENT secret.
+ *
+ * @summary Finish the secret
+ * @param {AWS.SecretsManager} secretsClient - The secrets manager service client
+ * @param {string} arn - The secret ARN or other identifier
+ * @param {string} token - The ClientRequestToken associated with the secret version
+ * @throws {AWS.AWSError} If the secret with the specified arn does not exist
+ */
+async function finishSecret(
+  secretsClient: AWS.SecretsManager,
+  arn: string,
+  token: string
+) {
+  // First describe the secret to get the current version
+  const metadata = await secretsClient
+    .describeSecret({
+      SecretId: arn,
+    })
+    .promise();
+  let currentVersion;
+  for (let version of Object.keys(metadata.VersionIdsToStages)) {
+    if (metadata.VersionIdsToStages[version].find(v => v === "AWSCURRENT")) {
+      if (version == token) {
+        // The correct version is already marked as current, return
+        console.info(
+          `finishSecret: Version ${version} already marked as AWSCURRENT for ${arn}`
+        );
+        return;
+      }
+      currentVersion = version;
+      break;
+    }
+  }
+
+  // Finalize by staging the secret version current
+  await secretsClient.updateSecretVersionStage({
+    SecretId: arn,
+    VersionStage: "AWSCURRENT",
+    MoveToVersionId: token,
+    RemoveFromVersionId: currentVersion
+  }).promise();
+  console.info(
+    `finishSecret: Successfully set AWSCURRENT stage to version ${token} for secret ${arn}.`
+  );
+}
+
+//#region Custom error impls to match original python code
+class ValueError extends Error {
+  constructor(message?: string) {
+    super(message);
+    this.name = "ValueError";
+  }
+}
+
+class NotImplementedError extends Error {
+  constructor(message?: string) {
+    super(message);
+    this.name = "NotImplementedError";
+  }
+}
+//#endregion