export class ReadOnlyProvider implements Provider {
  constructor(public client: PublicAPI) {}
  /**
   * Upgrades the provider to a Web3Provider by connecting an account
   * @param account - Account to connect to the provider
   * @returns The created Web3Provider
   */
  connectAccount(account: Account): Web3Provider {
    return new Web3Provider(this.client, account)
  }

  private readonly _providerName: string = 'Massa web3 ReadOnlyProvider'
  private readonly _accountRequiredError = `This method is not available in ReadOnlyProvider. Please use the "connectAccount" method to upgrade the class to a "Web3Provider".`

  get address(): string {
    throw new Error(this._accountRequiredError)
  }
  get accountName(): string {
    throw new Error(this._accountRequiredError)
  }
  get providerName(): string {
    return this._providerName
  }
...