Added langfuse-langchain and langfuse int as options

packages/@n8n/nodes-langchain/nodes/llms/LMChatOllama/LmChatOllama.node.ts

@@ -15,6 +15,7 @@ import { getConnectionHintNoticeField } from '@utils/sharedFields';
 import { ollamaModel, ollamaOptions, ollamaDescription } from '../LMOllama/description';
 import { makeN8nLlmFailedAttemptHandler } from '../n8nLlmFailedAttemptHandler';
 import { N8nLlmTracing } from '../N8nLlmTracing';
+import { CallbackHandler } from 'langfuse-langchain';
 
 export class LmChatOllama implements INodeType {
 	description: INodeTypeDescription = {
@@ -61,12 +62,27 @@ export class LmChatOllama implements INodeType {
 		const modelName = this.getNodeParameter('model', itemIndex) as string;
 		const options = this.getNodeParameter('options', itemIndex, {}) as ChatOllamaInput;
 
+		const { langfuse } = options as {
+			langfuse?: {
+				baseUrl: string;
+				publicKey: string;
+				secretKey: string;
+			};
+		};
+
+		const langfuseHandler = new CallbackHandler({
+			sessionId: this.getExecutionId(),
+			publicKey: langfuse?.publicKey ?? process.env.LANGFUSE_PUBLIC_KEY,
+			secretKey: langfuse?.secretKey ?? process.env.LANGFUSE_SECRET_KEY,
+			baseUrl: langfuse?.baseUrl ?? process.env.LANGFUSE_HOST,
+		});
+
 		const model = new ChatOllama({
 			...options,
 			baseUrl: credentials.baseUrl as string,
 			model: modelName,
 			format: options.format === 'default' ? undefined : options.format,
-			callbacks: [new N8nLlmTracing(this)],
+			callbacks: [new N8nLlmTracing(this), langfuseHandler],
 			onFailedAttempt: makeN8nLlmFailedAttemptHandler(this),
 		});
 

packages/@n8n/nodes-langchain/nodes/llms/LMOllama/LmOllama.node.ts

@@ -14,6 +14,7 @@ import { getConnectionHintNoticeField } from '@utils/sharedFields';
 import { ollamaDescription, ollamaModel, ollamaOptions } from './description';
 import { makeN8nLlmFailedAttemptHandler } from '../n8nLlmFailedAttemptHandler';
 import { N8nLlmTracing } from '../N8nLlmTracing';
+import { CallbackHandler } from 'langfuse-langchain';
 
 export class LmOllama implements INodeType {
 	description: INodeTypeDescription = {
@@ -60,11 +61,26 @@ export class LmOllama implements INodeType {
 		const modelName = this.getNodeParameter('model', itemIndex) as string;
 		const options = this.getNodeParameter('options', itemIndex, {}) as object;
 
+		const { langfuse } = options as {
+			langfuse?: {
+				baseUrl: string;
+				publicKey: string;
+				secretKey: string;
+			};
+		};
+
+		const langfuseHandler = new CallbackHandler({
+			sessionId: this.getExecutionId(),
+			publicKey: langfuse?.publicKey ?? process.env.LANGFUSE_PUBLIC_KEY,
+			secretKey: langfuse?.secretKey ?? process.env.LANGFUSE_SECRET_KEY,
+			baseUrl: langfuse?.baseUrl ?? process.env.LANGFUSE_HOST,
+		});
+
 		const model = new Ollama({
 			baseUrl: credentials.baseUrl as string,
 			model: modelName,
 			...options,
-			callbacks: [new N8nLlmTracing(this)],
+			callbacks: [new N8nLlmTracing(this), langfuseHandler],
 			onFailedAttempt: makeN8nLlmFailedAttemptHandler(this),
 		});
 

packages/@n8n/nodes-langchain/nodes/llms/LMOllama/description.ts

@@ -114,6 +114,41 @@ export const ollamaOptions: INodeProperties = {
 			description:
 				'Specifies the duration to keep the loaded model in memory after use. Useful for frequently used models. Format: 1h30m (1 hour 30 minutes).',
 		},
+		{
+			displayName: 'Langfuse',
+			name: 'langfuse',
+			placeholder: 'Add Langfuse Options',
+			description: 'Options for Langfuse tracing',
+			type: 'collection',
+			default: {},
+			options: [
+				{
+					displayName: 'Public Key',
+					name: 'publicKey',
+					type: 'string',
+					default: '',
+					description:
+						'Your Langfuse public key. Falls back to LANGFUSE_PUBLIC_KEY environment variable if not set.',
+				},
+				{
+					displayName: 'Secret Key',
+					name: 'secretKey',
+					type: 'string',
+					typeOptions: { password: true },
+					default: '',
+					description:
+						'Your Langfuse secret key. Falls back to LANGFUSE_SECRET_KEY environment variable if not set.',
+				},
+				{
+					displayName: 'Host',
+					name: 'baseUrl',
+					type: 'string',
+					default: '',
+					description:
+						'Your Langfuse host URL. Falls back to LANGFUSE_HOST environment variable if not set.',
+				},
+			],
+		},
 		{
 			displayName: 'Low VRAM Mode',
 			name: 'lowVram',

packages/@n8n/nodes-langchain/package.json

@@ -169,6 +169,7 @@
     "html-to-text": "9.0.5",
     "jsdom": "23.0.1",
     "langchain": "0.3.6",
+    "langfuse-langchain": "^3.32.0",
     "lodash": "catalog:",
     "mammoth": "1.7.2",
     "mime-types": "2.1.35",