Luma API Quickstart

class LumaAPI {
  constructor(apiKey) {
    this.apiKey = apiKey;
    this.baseUrl = 'https://api.kie.ai/api/v1/modify';
  }
  
  async modifyVideo(prompt, videoUrl, options = {}) {
    const response = await fetch(`${this.baseUrl}/generate`, {
      method: 'POST',
      headers: {
        'Authorization': `Bearer ${this.apiKey}`,
        'Content-Type': 'application/json'
      },
      body: JSON.stringify({
        prompt,
        videoUrl,
        callBackUrl: options.callBackUrl,
        watermark: options.watermark,
        ...options
      })
    });
    
    const result = await response.json();
    if (!response.ok || result.code !== 200) {
      throw new Error(`Generation failed: ${result.msg || 'Unknown error'}`);
    }
    
    return result.data.taskId;
  }
  
  async waitForCompletion(taskId, maxWaitTime = 900000) { // 15 minutes max
    const startTime = Date.now();
    
    while (Date.now() - startTime < maxWaitTime) {
      const status = await this.getTaskStatus(taskId);
      
      switch (status.successFlag) {
        case 0:
          console.log('Task is generating, continue waiting...');
          break;
          
        case 1:
          console.log('Generation completed successfully!');
          return status.response;
          
        case 4:
          console.log('Generation succeeded but callback failed');
          return status.response;
          
        case 2:
          const createError = status.errorMessage || 'Task creation failed';
          console.error('Task creation failed:', createError);
          if (status.errorCode) {
            console.error('Error code:', status.errorCode);
          }
          throw new Error(createError);
          
        case 3:
          const generateError = status.errorMessage || 'Task created successfully but generation failed';
          console.error('Generation failed:', generateError);
          if (status.errorCode) {
            console.error('Error code:', status.errorCode);
          }
          throw new Error(generateError);
          
        default:
          console.log(`Unknown status: ${status.successFlag}`);
          if (status.errorMessage) {
            console.error('Error message:', status.errorMessage);
          }
          break;
      }
      
      // Wait 10 seconds before next check
      await new Promise(resolve => setTimeout(resolve, 10000));
    }
    
    throw new Error('Generation timeout');
  }
  
  async getTaskStatus(taskId) {
    const response = await fetch(`${this.baseUrl}/record-info?taskId=${taskId}`, {
      method: 'GET',
      headers: {
        'Authorization': `Bearer ${this.apiKey}`
      }
    });
    
    const result = await response.json();
    if (!response.ok || result.code !== 200) {
      throw new Error(`Status check failed: ${result.msg || 'Unknown error'}`);
    }
    
    return result.data;
  }
}

// Usage Example
async function main() {
  const api = new LumaAPI('YOUR_API_KEY');
  
  try {
    // Video Modification
    console.log('Starting video modification...');
    const taskId = await api.modifyVideo(
      'A futuristic cityscape at night with towering glass spires reaching into a starry sky. Neon lights in blue and purple illuminate the buildings while flying vehicles glide silently between the structures. Holographic advertisements flicker and change on building facades.',
      'https://example.com/input-video.mp4',
      { 
        callBackUrl: 'https://your-callback-url.com/luma-callback',
        watermark: 'your-watermark-id'
      }
    );
    
    // Wait for completion
    console.log(`Task ID: ${taskId}. Waiting for completion...`);
    const result = await api.waitForCompletion(taskId);
    
    console.log('Video modified successfully!');
    console.log('Result Video URLs:', result.resultUrls);
    console.log('Original Video URLs:', result.originUrls);
    
  } catch (error) {
    console.error('Error:', error.message);
  }
}

main();