metamask-extension/development/mock-3box.js

function delay(time) {
  return new Promise((resolve) => setTimeout(resolve, time));
}

async function loadFromMock3Box(key) {
  const res = await window.fetch(`http://localhost:8889?key=${key}`);
  const text = await res.text();
  return text.length ? JSON.parse(text) : null;
}

async function saveToMock3Box(key, newDataAtKey) {
  const res = await window.fetch('http://localhost:8889', {
    method: 'POST',
    body: JSON.stringify({
      key,
      data: newDataAtKey,
    }),
  });

  return res.text();
}

class Mock3Box {
  static openBox(address) {
    this.address = address;
    return Promise.resolve({
      onSyncDone: (cb) => {
        setTimeout(cb, 200);
      },
      openSpace: async (spaceName, config) => {
        const { onSyncDone } = config;
        this.spaceName = spaceName;

        setTimeout(onSyncDone, 150);

        await delay(50);

        return {
          private: {
            get: async (key) => {
              await delay(50);
              const res = await loadFromMock3Box(
                `${this.address}-${this.spaceName}-${key}`,
              );
              return res;
            },
            set: async (key, data) => {
              await saveToMock3Box(
                `${this.address}-${this.spaceName}-${key}`,
                data,
              );
              await delay(50);
              return null;
            },
          },
        };
      },
      logout: () => undefined,
    });
  }

  static async getConfig(address) {
    const backup = await loadFromMock3Box(`${address}-metamask-metamaskBackup`);
    return backup ? { spaces: { metamask: {} } } : {};
  }
}

module.exports = Mock3Box;