✨ Add CoinGecko-Node

* Add CoinGecko node

* CoinGecko improvements and add events

* ⚡ Small improvements

* ⚡ Improvements to CoinGecko-Node

Co-authored-by: Dokime <jnau5@yahoo.com>
Co-authored-by: ricardo <ricardoespinoza105@gmail.com>

packages/nodes-base/nodes/CoinGecko/GenericFunctions.ts

@@ -0,0 +1,67 @@
+import {
+	OptionsWithUri,
+} from 'request';
+
+import {
+	IExecuteFunctions,
+	IExecuteSingleFunctions,
+	ILoadOptionsFunctions,
+} from 'n8n-core';
+
+import {
+	IDataObject,
+} from 'n8n-workflow';
+
+export async function coinGeckoApiRequest(this: IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions, method: string,
+	endpoint: string, body: any = {}, qs: IDataObject = {}, uri?: string, option: IDataObject = {}): Promise<any> { // tslint:disable-line:no-any
+	let options: OptionsWithUri = {
+		headers: {
+			'Accept': 'application/json',
+			'Content-Type': 'application/json',
+		},
+		method,
+		body,
+		qs,
+		uri: uri || `https://api.coingecko.com/api/v3${endpoint}`,
+		json: true,
+	};
+
+	options = Object.assign({}, options, option);
+
+	try {
+		if (Object.keys(body).length === 0) {
+			delete options.body;
+		}
+
+		//@ts-ignore
+		return await this.helpers.request.call(this, options);
+
+	} catch (error) {
+
+		throw error;
+	}
+}
+
+export async function coinGeckoRequestAllItems(this: IExecuteFunctions | ILoadOptionsFunctions, propertyName: string, method: string, endpoint: string, body: any = {}, query: IDataObject = {}): Promise<any> { // tslint:disable-line:no-any
+
+	const returnData: IDataObject[] = [];
+
+	let responseData;
+	let respData;
+	query.per_page = 250;
+	query.page = 1;
+
+	do {
+		responseData = await coinGeckoApiRequest.call(this, method, endpoint, body, query);
+		query.page++;
+		respData = responseData;
+		if (propertyName !== '') {
+			respData = responseData[propertyName];
+		}
+		returnData.push.apply(returnData, respData);
+	} while (
+		respData.length !== 0
+	);
+
+	return returnData;
+}