fix(types): added readme and removed external type reliance

README.md

@@ -0,0 +1,3 @@
+# valory-adaptor-alb
+Valory adaptor that processes request forwarded from an AWS Application Load Balancer.
+Very small and lightweight, only requires being run in a lambda with the proper permissions.

src/albAdaptor.ts

@@ -1,7 +1,6 @@
 import FMW = require("find-my-way");
-import {Callback, Context} from "aws-lambda";
 import {ApiRequest, ApiResponse, ApiServer, HttpMethod, ValoryMetadata} from "valory-runtime";
-import {ALBRequestEvent, ALBResponse, FormattedRequest} from "./types/alb";
+import {ALBRequestEvent, ALBResponse, Callback, Context, FormattedRequest} from "./types/alb";
 import qs = require("querystring");
 
 const pathReplacer = /{([\S]*?)}/g;

src/types/alb.d.ts

@@ -1,5 +1,3 @@
-import {Context} from "aws-lambda";
-
 export interface ALBRequestEvent {
 	requestContext: {
 		elb: {
@@ -35,4 +33,57 @@ export interface ALBResponse {
 	isBase64Encoded: boolean;
 	headers?: {[key: string]: string};
 	body?: string;
-}
+}
+
+export interface Context {
+	// Properties
+	callbackWaitsForEmptyEventLoop: boolean;
+	functionName: string;
+	functionVersion: string;
+	invokedFunctionArn: string;
+	memoryLimitInMB: number;
+	awsRequestId: string;
+	logGroupName: string;
+	logStreamName: string;
+	identity?: CognitoIdentity;
+	clientContext?: ClientContext;
+
+	// Functions
+	getRemainingTimeInMillis(): number;
+
+	// Functions for compatibility with earlier Node.js Runtime v0.10.42
+	// For more details see http://docs.aws.amazon.com/lambda/latest/dg/nodejs-prog-model-using-old-runtime.html#nodejs-prog-model-oldruntime-context-methods
+	done(error?: Error, result?: any): void;
+	fail(error: Error | string): void;
+	succeed(messageOrObject: any): void;
+	succeed(message: string, object: any): void;
+}
+
+export interface CognitoIdentity {
+	cognitoIdentityId: string;
+	cognitoIdentityPoolId: string;
+}
+
+export interface ClientContext {
+	client: ClientContextClient;
+	custom?: any;
+	env: ClientContextEnv;
+}
+
+export interface ClientContextClient {
+	installationId: string;
+	appTitle: string;
+	appVersionName: string;
+	appVersionCode: string;
+	appPackageName: string;
+}
+
+export interface ClientContextEnv {
+	platformVersion: string;
+	platform: string;
+	make: string;
+	model: string;
+	locale: string;
+}
+
+export type Callback<TResult = any> = (error?: Error | null | string, result?: TResult) => void;