62 lines
1.7 KiB
TypeScript
62 lines
1.7 KiB
TypeScript
import { INode, INodeData, INodeParams } from '../../../src/Interface'
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import { getBaseClasses } from '../../../src/utils'
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class LLMChain_Chains implements INode {
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label: string
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name: string
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type: string
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icon: string
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category: string
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baseClasses: string[]
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description: string
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inputs: INodeParams[]
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constructor() {
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this.label = 'LLM Chain'
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this.name = 'llmChain'
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this.type = 'LLMChain'
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this.icon = 'chain.svg'
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this.category = 'Chains'
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this.description = 'Chain to run queries against LLMs'
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this.inputs = [
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{
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label: 'LLM',
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name: 'llm',
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type: 'BaseLanguageModel'
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},
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{
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label: 'Prompt',
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name: 'prompt',
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type: 'BasePromptTemplate'
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}
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]
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}
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async getBaseClasses(): Promise<string[]> {
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const { LLMChain } = await import('langchain/chains')
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return getBaseClasses(LLMChain)
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}
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async init(nodeData: INodeData): Promise<any> {
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const { LLMChain } = await import('langchain/chains')
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const llm = nodeData.inputs?.llm
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const prompt = nodeData.inputs?.prompt
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const chain = new LLMChain({ llm, prompt })
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return chain
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}
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async run(nodeData: INodeData, input: string): Promise<string> {
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const prompt = nodeData.instance.prompt.inputVariables // ["product"]
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if (prompt.length > 1) throw new Error('Prompt can only contains 1 literal string {}. Multiples are found')
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const chain = nodeData.instance
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const res = await chain.run(input)
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return res
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}
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}
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module.exports = { nodeClass: LLMChain_Chains }
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