import { IHookFunctions, IWebhookFunctions, } from 'n8n-core'; import { IDataObject, ILoadOptionsFunctions, INodeType, INodeTypeDescription, IWebhookResponseData, } from 'n8n-workflow'; import { getTriggerName, livePublicKey, Profile, testPublicKey, wiseApiRequest, } from './GenericFunctions'; import { createVerify, } from 'crypto'; export class WiseTrigger implements INodeType { description: INodeTypeDescription = { displayName: 'Wise Trigger', name: 'wiseTrigger', icon: 'file:wise.svg', group: ['trigger'], version: 1, subtitle: '={{$parameter["event"]}}', description: 'Handle Wise events via webhooks', defaults: { name: 'Wise Trigger', color: '#37517e', }, inputs: [], outputs: ['main'], credentials: [ { name: 'wiseApi', required: true, }, ], webhooks: [ { name: 'default', httpMethod: 'POST', responseMode: 'onReceived', path: 'webhook', }, ], properties: [ { displayName: 'Profile', name: 'profileId', type: 'options', required: true, typeOptions: { loadOptionsMethod: 'getProfiles', }, default: '', }, { displayName: 'Event', name: 'event', type: 'options', required: true, default: '', options: [ { name: 'Balance Credit', value: 'balanceCredit', description: 'Triggered every time a balance account is credited.', }, { name: 'Transfer Active Case', value: 'transferActiveCases', description: `Triggered every time a transfer's list of active cases is updated.`, }, { name: 'Transfer State Changed', value: 'tranferStateChange', description: `Triggered every time a transfer's status is updated.`, }, ], }, ], }; methods = { loadOptions: { async getProfiles(this: ILoadOptionsFunctions) { const profiles = await wiseApiRequest.call(this, 'GET', 'v1/profiles'); return profiles.map(({ id, type }: Profile) => ({ name: type.charAt(0).toUpperCase() + type.slice(1), value: id, })); }, }, }; // @ts-ignore webhookMethods = { default: { async checkExists(this: IHookFunctions): Promise { const webhookData = this.getWorkflowStaticData('node'); const webhookUrl = this.getNodeWebhookUrl('default'); const profileId = this.getNodeParameter('profileId') as string; const event = this.getNodeParameter('event') as string; const webhooks = await wiseApiRequest.call(this, 'GET', `v3/profiles/${profileId}/subscriptions`); const trigger = getTriggerName(event); for (const webhook of webhooks) { if (webhook.delivery.url === webhookUrl && webhook.scope.id === profileId && webhook.trigger_on === trigger) { webhookData.webhookId = webhook.id; return true; } } return false; }, async create(this: IHookFunctions): Promise { const webhookUrl = this.getNodeWebhookUrl('default'); const webhookData = this.getWorkflowStaticData('node'); const profileId = this.getNodeParameter('profileId') as string; const event = this.getNodeParameter('event') as string; const trigger = getTriggerName(event); const body: IDataObject = { name: `n8n Webhook`, trigger_on: trigger, delivery: { version: '2.0.0', url: webhookUrl, }, }; const webhook = await wiseApiRequest.call(this, 'POST', `v3/profiles/${profileId}/subscriptions`, body); webhookData.webhookId = webhook.id; return true; }, async delete(this: IHookFunctions): Promise { const webhookData = this.getWorkflowStaticData('node'); const profileId = this.getNodeParameter('profileId') as string; try { await wiseApiRequest.call(this, 'DELETE', `v3/profiles/${profileId}/subscriptions/${webhookData.webhookId}`); } catch (error) { return false; } delete webhookData.webhookId; return true; }, }, }; async webhook(this: IWebhookFunctions): Promise { const req = this.getRequestObject(); const headers = this.getHeaderData() as IDataObject; const credentials = this.getCredentials('wiseApi') as IDataObject; if (headers['x-test-notification'] === 'true') { const res = this.getResponseObject(); res.status(200).end(); return { noWebhookResponse: true, }; } const signature = headers['x-signature'] as string; const publicKey = (credentials.environment === 'test') ? testPublicKey : livePublicKey as string; //@ts-ignore const sig = createVerify('RSA-SHA1').update(req.rawBody); const verified = sig.verify( publicKey, signature, 'base64', ); if (verified === false) { return {}; } return { workflowData: [ this.helpers.returnJsonArray(req.body), ], }; } }