Client to do all the git things

gitClient.ts

// gitClient.ts
import { Octokit } from '@octokit/rest';

export class GitClient {
  private octokit: Octokit;
  private owner: string;
  private repo: string;

  constructor(baseURL: string, apiToken: string, owner: string, repo: string) {
    this.octokit = new Octokit({
      baseUrl: baseURL,
      auth: apiToken,
    });
    this.owner = owner;
    this.repo = repo;
  }

  async createBranch(branchName: string): Promise<void> {
    const { data: mainBranch } = await this.octokit.git.getRef({
      owner: this.owner,
      repo: this.repo,
      ref: 'heads/main',
    });

    await this.octokit.git.createRef({
      owner: this.owner,
      repo: this.repo,
      ref: `refs/heads/${branchName}`,
      sha: mainBranch.object.sha,
    });
  }

  async commitCode(branchName: string, code: string): Promise<void> {
    const { data: baseTree } = await this.octokit.git.getTree({
      owner: this.owner,
      repo: this.repo,
      tree_sha: 'main',
    });

    const { data: newBlob } = await this.octokit.git.createBlob({
      owner: this.owner,
      repo: this.repo,
      content: code,
      encoding: 'utf-8',
    });

    const { data: newTree } = await this.octokit.git.createTree({
      owner: this.owner,
      repo: this.repo,
      base_tree: baseTree.sha,
      tree: [
        {
          path: 'generated_code.ts',
          mode: '100644',
          type: 'blob',
          sha: newBlob.sha,
        },
      ],
       const { data: newCommit } = await this.octokit.git.createCommit({
      owner: this.owner,
      repo: this.repo,
      message: `Implement ${branchName}`,
      tree: newTree.sha,
      parents: [baseTree.sha],
    });

    await this.octokit.git.updateRef({
      owner: this.owner,
      repo: this.repo,
      ref: `heads/${branchName}`,
      sha: newCommit.sha,
    });
  }

  async createPullRequest(sourceBranch: string, targetBranch: string, title: string): Promise<void> {
    await this.octokit.pulls.create({
      owner: this.owner,
      repo: this.repo,
      head: sourceBranch,
      base: targetBranch,
      title: title,
    });
  }
}