Create or obtain values from the AWS Parameter store with Typescript/node

parameterStore.ts

import { SSM } from 'aws-sdk';

/**
 * Get the value for a parameter in SSM Parameter Store. By default, decrypt
 * the value as we assume it is stored as a "SecretString"
 *
 * Ref: https://gist.github.com/cbschuld/938190f81d00934f7a158ff223fb5e02
 *
 * @param ssm The SSM client
 * @param name Name of the parameter
 * @param decrypt True to decrypt a secret parameter (default is true)
 * @returns The parameter value
 */
export const getParamValue = async (
    ssm: SSM,
    name: string,
    decrypt: boolean = true
): Promise<string> => {
    const params: SSM.GetParameterRequest = {
        Name: name,
        WithDecryption: decrypt,
    };

    const res = await ssm.getParameter(params).promise();
    return res.Parameter?.Value!;
};

/**
 * Create a parameter in SSM Parameter Store.
 *
 * @param ssm The SSM client
 * @param name Name of the parameter
 * @param value Value of the parameter
 * @param type Type of the parameter, defaults to "SecretString" so the value
 * is encrypted.
 * @returns The parameter value
 */
export const createParamValue = (
    ssm: SSM,
    name: string,
    value: string,
    type: string = 'SecureString'
) => {
    const params: SSM.PutParameterRequest = {
        Type: type,
        Name: name,
        Value: value,
    };

    ssm.putParameter(params).send();
};