BAU: bump aws sdk from v2 to v3

AWS SDK for js is being deprecated and is entering maintenance mode in September, 2024.

The bump required some code changes as the implementation of some features have been changed/removed.

Also deleted aws.ts as none of the functions in this file were used.

package.json

@@ -63,12 +63,12 @@
   },
   "dependencies": {
     "@aws-sdk/client-kms": "^3.366.0",
+    "@aws-sdk/client-ssm": "^3.366.0",
     "@govuk-one-login/frontend-language-toggle": "^1.1.0",
     "@govuk-one-login/frontend-passthrough-headers": "^0.0.3",
     "@govuk-one-login/frontend-analytics": "1.0.3",
     "@otplib/core": "^12.0.1",
     "@otplib/plugin-base32-enc-dec": "^12.0.1",
-    "aws-sdk": "^2.1356.0",
     "axios": "^1.6.8",
     "connect-redis": "^7.1.1",
     "cookie-parser": "^1.4.5",

src/config.ts

@@ -1,6 +1,6 @@
 import { RedisConfig } from "./utils/types";
 import ssm from "./utils/ssm";
-import { Parameter } from "aws-sdk/clients/ssm";
+import { Parameter } from "@aws-sdk/client-ssm";
 import { ENVIRONMENT_NAME } from "./app.constants";
 
 export function getLogLevel(): string {
@@ -74,7 +74,7 @@ export async function getRedisConfig(): Promise<RedisConfig> {
     WithDecryption: true,
   };
 
-  const result = await ssm.getParameters(params).promise();
+  const result = await ssm.getParameters(params);
 
   if (result.InvalidParameters && result.InvalidParameters.length > 0) {
     throw Error("Invalid SSM config values for redis");

src/utils/ssm.ts

@@ -1,3 +1,3 @@
-const AWS = require("aws-sdk");
+const { SSM } = require("@aws-sdk/client-ssm");
 
-export default new AWS.SSM();
+export default new SSM();