fix(InvoiceNinja Node): added support for v5

packages/nodes-base/credentials/InvoiceNinjaApi.credentials.ts

@@ -1,4 +1,10 @@
-import { ICredentialType, INodeProperties } from 'n8n-workflow';
+import {
+	ICredentialDataDecryptedObject,
+	ICredentialTestRequest,
+	ICredentialType,
+	IHttpRequestOptions,
+	INodeProperties,
+} from 'n8n-workflow';
 
 export class InvoiceNinjaApi implements ICredentialType {
 	name = 'invoiceNinjaApi';
@@ -9,7 +15,8 @@ export class InvoiceNinjaApi implements ICredentialType {
 			displayName: 'URL',
 			name: 'url',
 			type: 'string',
-			default: 'https://app.invoiceninja.com',
+			default: '',
+			hint: 'Default URL for v4 is https://app.invoiceninja.com, for v5 it is https://invoicing.co',
 		},
 		{
 			displayName: 'API Token',
@@ -17,5 +24,42 @@ export class InvoiceNinjaApi implements ICredentialType {
 			type: 'string',
 			default: '',
 		},
+		{
+			displayName: 'Secret',
+			name: 'secret',
+			type: 'string',
+			default: '',
+			hint: 'This is optional, enter only if you did set a secret in your app and only if you are using v5',
+		},
 	];
+	test: ICredentialTestRequest = {
+		request: {
+			baseURL: '={{$credentials?.url}}',
+			url: '/api/v1/clients',
+			method: 'GET',
+		},
+	};
+	async authenticate(
+		credentials: ICredentialDataDecryptedObject,
+		requestOptions: IHttpRequestOptions,
+	): Promise<IHttpRequestOptions> {
+		const VERSION_5_TOKEN_LENGTH = 64;
+		const { apiToken, secret } = credentials;
+		const tokenLength = (apiToken as string).length;
+
+		if (tokenLength < VERSION_5_TOKEN_LENGTH) {
+			requestOptions.headers = {
+				Accept: 'application/json',
+				'X-Ninja-Token': apiToken,
+			};
+		} else {
+			requestOptions.headers = {
+				'Content-Type': 'application/json',
+				'X-API-TOKEN': apiToken,
+				'X-Requested-With': 'XMLHttpRequest',
+				'X-API-SECRET': secret || '',
+			};
+		}
+		return requestOptions;
+	}
 }