n8n/packages/nodes-base/nodes/CoinGecko/CoinGecko.node.ts

import {
	IExecuteFunctions,
} from 'n8n-core';

import {
	IDataObject,
	ILoadOptionsFunctions,
	INodeExecutionData,
	INodePropertyOptions,
	INodeType,
	INodeTypeDescription,
} from 'n8n-workflow';

import {
	coinFields,
	coinOperations,
} from './CoinDescription';

import {
	eventFields,
	eventOperations,
} from './EventDescription';

import {
	coinGeckoApiRequest,
	coinGeckoRequestAllItems,
} from './GenericFunctions';

import * as moment from 'moment-timezone';

export class CoinGecko implements INodeType {
	description: INodeTypeDescription = {
		displayName: 'CoinGecko',
		name: 'coinGecko',
		icon: 'file:coinGecko.png',
		group: ['output'],
		version: 1,
		description: 'Consume CoinGecko API',
		subtitle: '={{$parameter["operation"] + ": " + $parameter["resource"]}}',
		defaults: {
			name: 'CoinGecko',
			color: '#8bc53f',
		},
		inputs: ['main'],
		outputs: ['main'],
		properties: [
			{
				displayName: 'Resource',
				name: 'resource',
				type: 'options',
				options: [
					{
						name: 'Coin',
						value: 'coin',
					},
					{
						name: 'Event',
						value: 'event',
					},
				],
				default: 'coin',
			},
			...coinOperations,
			...coinFields,
			...eventOperations,
			...eventFields,
		],
	};

	methods = {
		loadOptions: {
			async getCurrencies(this: ILoadOptionsFunctions): Promise<INodePropertyOptions[]> {
				const returnData: INodePropertyOptions[] = [];
				const currencies = await coinGeckoApiRequest.call(
					this,
					'GET',
					'/simple/supported_vs_currencies',
				);
				currencies.sort();
				for (const currency of currencies) {
					returnData.push({
						name: currency.toUpperCase(),
						value: currency,
					});
				}
				return returnData;
			},

			async getCoins(this: ILoadOptionsFunctions): Promise<INodePropertyOptions[]> {
				const returnData: INodePropertyOptions[] = [];
				const coins = await coinGeckoApiRequest.call(
					this,
					'GET',
					'/coins/list',
				);
				for (const coin of coins) {
					returnData.push({
						name: coin.symbol.toUpperCase(),
						value: coin.id,
					});
				}
				returnData.sort((a, b) => {
					if (a.name < b.name) { return -1; }
					if (a.name > b.name) { return 1; }
					return 0;
				});
				return returnData;
			},

			async getExchanges(this: ILoadOptionsFunctions): Promise<INodePropertyOptions[]> {
				const returnData: INodePropertyOptions[] = [];
				const exchanges = await coinGeckoApiRequest.call(
					this,
					'GET',
					'/exchanges/list',
				);
				for (const exchange of exchanges) {
					returnData.push({
						name: exchange.name,
						value: exchange.id,
					});
				}
				return returnData;
			},

			async getEventCountryCodes(this: ILoadOptionsFunctions): Promise<INodePropertyOptions[]> {
				const returnData: INodePropertyOptions[] = [];
				const countryCodes = await coinGeckoApiRequest.call(
					this,
					'GET',
					'/events/countries',
				);
				for (const code of countryCodes.data) {
					if (!code.code) {
						continue;
					}
					returnData.push({
						name: code.country,
						value: code.code,
					});
				}
				return returnData;
			},

			async getEventTypes(this: ILoadOptionsFunctions): Promise<INodePropertyOptions[]> {
				const returnData: INodePropertyOptions[] = [];
				const eventTypes = await coinGeckoApiRequest.call(
					this,
					'GET',
					'/events/types',
				);
				for (const type of eventTypes.data) {
					returnData.push({
						name: type,
						value: type,
					});
				}
				return returnData;
			},
		},
	};

	async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
		const items = this.getInputData();
		const returnData: IDataObject[] = [];
		const length = (items.length as unknown) as number;
		const qs: IDataObject = {};
		let responseData;
		const resource = this.getNodeParameter('resource', 0) as string;
		const operation = this.getNodeParameter('operation', 0) as string;
		for (let i = 0; i < length; i++) {

			if (resource === 'coin') {
				//https://www.coingecko.com/api/documentations/v3#/coins/get_coins__id_
				//https://www.coingecko.com/api/documentations/v3#/contract/get_coins__id__contract__contract_address_
				if (operation === 'get') {

					const options = this.getNodeParameter('options', i) as IDataObject;

					qs.community_data = false;
					qs.developer_data = false;
					qs.localization = false;
					qs.market_data = false;
					qs.sparkline = false;
					qs.tickers = false;

					Object.assign(qs, options);

					const searchBy = this.getNodeParameter('searchBy', i) as string;

					if (searchBy === 'coinId') {
						const coinId = this.getNodeParameter('coinId', i) as string;

						responseData = await coinGeckoApiRequest.call(
							this,
							'GET',
							`/coins/${coinId}`,
							{},
							qs,
						);
					}

					if (searchBy === 'contractAddress') {
						const platformId = this.getNodeParameter('platformId', i) as string;
						const contractAddress = this.getNodeParameter('contractAddress', i) as string;

						responseData = await coinGeckoApiRequest.call(
							this,
							'GET',
							`/coins/${platformId}/contract/${contractAddress}`,
							{},
							qs,
						);
					}
				}
				//https://www.coingecko.com/api/documentations/v3#/coins/get_coins_list
				if (operation === 'getAll') {

					const returnAll = this.getNodeParameter('returnAll', i) as boolean;

					let limit;

					responseData = await coinGeckoApiRequest.call(
						this,
						'GET',
						'/coins/list',
						{},
						qs,
					);

					if (returnAll === false) {
						limit = this.getNodeParameter('limit', i) as number;
						responseData = responseData.splice(0, limit);
					}
				}

				//https://www.coingecko.com/api/documentations/v3#/coins/get_coins_list
				if (operation === 'market') {

					const returnAll = this.getNodeParameter('returnAll', i) as boolean;
					const baseCurrency = this.getNodeParameter('baseCurrency', i) as string;
					const options = this.getNodeParameter('options', i) as IDataObject;

					qs.vs_currency = baseCurrency;

					Object.assign(qs, options);

					if (options.price_change_percentage) {
						qs.price_change_percentage = (options.price_change_percentage as string[]).join(',');
					}

					if (returnAll) {
						responseData = await coinGeckoRequestAllItems.call(
							this,
							'',
							'GET',
							`/coins/markets`,
							{},
							qs,
						);
					} else {
						const limit = this.getNodeParameter('limit', i) as number;

						qs.per_page = limit;

						responseData = await coinGeckoApiRequest.call(
							this,
							'GET',
							`/coins/markets`,
							{},
							qs,
						);
					}
				}

				//https://www.coingecko.com/api/documentations/v3#/simple/get_simple_price
				//https://www.coingecko.com/api/documentations/v3#/simple/get_simple_token_price__id_
				if (operation === 'price') {

					const searchBy = this.getNodeParameter('searchBy', i) as string;
					const quoteCurrencies = this.getNodeParameter('quoteCurrencies', i) as string[];
					const options = this.getNodeParameter('options', i) as IDataObject;

					qs.vs_currencies = quoteCurrencies.join(',');

					Object.assign(qs, options);

					if (searchBy === 'coinId') {
						const baseCurrencies = this.getNodeParameter('baseCurrencies', i) as string[];

						qs.ids = baseCurrencies.join(',');

						responseData = await coinGeckoApiRequest.call(
							this,
							'GET',
							'/simple/price',
							{},
							qs,
						);
					}

					if (searchBy === 'contractAddress') {
						const platformId = this.getNodeParameter('platformId', i) as string;
						const contractAddresses = this.getNodeParameter('contractAddresses', i) as string;

						qs.contract_addresses = contractAddresses;

						responseData = await coinGeckoApiRequest.call(
							this,
							'GET',
							`/simple/token_price/${platformId}`,
							{},
							qs,
						);
					}
				}

				//https://www.coingecko.com/api/documentations/v3#/coins/get_coins__id__tickers
				if (operation === 'ticker') {

					const returnAll = this.getNodeParameter('returnAll', i) as boolean;
					const coinId = this.getNodeParameter('coinId', i) as string;
					const options = this.getNodeParameter('options', i) as IDataObject;

					Object.assign(qs, options);

					if (options.exchange_ids) {
						qs.exchange_ids = (options.exchange_ids as string[]).join(',');
					}

					if (returnAll) {

						responseData = await coinGeckoRequestAllItems.call(
							this,
							'tickers',
							'GET',
							`/coins/${coinId}/tickers`,
							{},
							qs,
						);
					} else {
						const limit = this.getNodeParameter('limit', i) as number;

						responseData = await coinGeckoApiRequest.call(
							this,
							'GET',
							`/coins/${coinId}/tickers`,
							{},
							qs,
						);

						responseData = responseData.tickers;
						responseData = responseData.splice(0, limit);
					}
				}

				//https://www.coingecko.com/api/documentations/v3#/coins/get_coins__id__history
				if (operation === 'history') {

					const coinId = this.getNodeParameter('coinId', i) as string;
					const date = this.getNodeParameter('date', i) as string;
					const options = this.getNodeParameter('options', i) as IDataObject;

					Object.assign(qs, options);

					qs.date = moment(date).format('DD-MM-YYYY');

					responseData = await coinGeckoApiRequest.call(
						this,
						'GET',
						`/coins/${coinId}/history`,
						{},
						qs,
					);
				}

				//https://www.coingecko.com/api/documentations/v3#/coins/get_coins__id__market_chart
				//https://www.coingecko.com/api/documentations/v3#/contract/get_coins__id__contract__contract_address__market_chart_
				if (operation === 'marketChart') {

					let respData;

					const searchBy = this.getNodeParameter('searchBy', i) as string;
					const quoteCurrency = this.getNodeParameter('quoteCurrency', i) as string;
					const days = this.getNodeParameter('days', i) as string;

					qs.vs_currency = quoteCurrency;
					qs.days = days;

					if (searchBy === 'coinId') {
						const coinId = this.getNodeParameter('baseCurrency', i) as string;

						respData = await coinGeckoApiRequest.call(
							this,
							'GET',
							`/coins/${coinId}/market_chart`,
							{},
							qs,
						);
					}

					if (searchBy === 'contractAddress') {
						const platformId = this.getNodeParameter('platformId', i) as string;
						const contractAddress = this.getNodeParameter('contractAddress', i) as string;

						respData = await coinGeckoApiRequest.call(
							this,
							'GET',
							`/coins/${platformId}/contract/${contractAddress}/market_chart`,
							{},
							qs,
						);
					}

					responseData = [];
					for (let idx = 0; idx < respData.prices.length; idx++) {
						const [time, price] = respData.prices[idx];
						const marketCaps = respData.market_caps[idx][1];
						const totalVolume = respData.total_volumes[idx][1];
						responseData.push({ time: moment(time).toISOString(), price, marketCaps, totalVolume } as IDataObject);
					}
				}

				//https://www.coingecko.com/api/documentations/v3#/coins/get_coins__id__ohlc
				if (operation === 'candlestick') {

					const baseCurrency = this.getNodeParameter('baseCurrency', i) as string;
					const quoteCurrency = this.getNodeParameter('quoteCurrency', i) as string;
					const days = this.getNodeParameter('days', i) as string;

					qs.vs_currency = quoteCurrency;
					qs.days = days;

					responseData = await coinGeckoApiRequest.call(
						this,
						'GET',
						`/coins/${baseCurrency}/ohlc`,
						{},
						qs,
					);

					for (let idx = 0; idx < responseData.length; idx++) {
						const [time, open, high, low, close] = responseData[idx];
						responseData[idx] = { time: moment(time).toISOString(), open, high, low, close } as IDataObject;
					}
				}
			}

			if (resource === 'event') {
				//https://www.coingecko.com/api/documentations/v3#/events/get_events
				if (operation === 'getAll') {

					const returnAll = this.getNodeParameter('returnAll', i) as boolean;
					const options = this.getNodeParameter('options', i) as IDataObject;

					Object.assign(qs, options);

					if (returnAll) {
						responseData = await coinGeckoRequestAllItems.call(
							this,
							'data',
							'GET',
							'/events',
							{},
							qs,
						);
					} else {
						const limit = this.getNodeParameter('limit', i) as number;

						qs.per_page = limit;

						responseData = await coinGeckoApiRequest.call(
							this,
							'GET',
							'/events',
							{},
							qs,
						);
						responseData = responseData.data;
					}
				}
			}

			if (resource === 'simple') {
				//https://www.coingecko.com/api/documentations/v3#/simple/get_simple_price
				if (operation === 'price') {

					const ids = this.getNodeParameter('ids', i) as string;
					const currencies = this.getNodeParameter('currencies', i) as string[];
					const options = this.getNodeParameter('options', i) as IDataObject;

					qs.ids = ids,
						qs.vs_currencies = currencies.join(',');

					Object.assign(qs, options);

					responseData = await coinGeckoApiRequest.call(
						this,
						'GET',
						'/simple/price',
						{},
						qs,
					);
				}

				//https://www.coingecko.com/api/documentations/v3#/simple/get_simple_token_price__id_
				if (operation === 'tokenPrice') {

					const id = this.getNodeParameter('id', i) as string;
					const contractAddresses = this.getNodeParameter('contractAddresses', i) as string;
					const currencies = this.getNodeParameter('currencies', i) as string[];
					const options = this.getNodeParameter('options', i) as IDataObject;

					qs.contract_addresses = contractAddresses;
					qs.vs_currencies = currencies.join(',');

					Object.assign(qs, options);

					responseData = await coinGeckoApiRequest.call(
						this,
						'GET',
						`/simple/token_price/${id}`,
						{},
						qs,
					);
				}
			}

		}
		if (Array.isArray(responseData)) {
			returnData.push.apply(returnData, responseData as IDataObject[]);
		} else if (responseData !== undefined) {
			returnData.push(responseData as IDataObject);
		}
		return [this.helpers.returnJsonArray(returnData)];
	}
}