// TODO: imports and functions goes here

/** A high-level interface to a blockchain node */
export class MyBlockchainConnection implements BlockchainConnection {
  public static async establish(myBlockchainParameters):
  Promise<MyBlockchainConnection> {
    // TODO: logic to load blockchain parameters (nethash, chainId, etc)
    return new MyBlockchainConnection(myBlockchainParameters);
  }

  constructor(){
    // TODO: initialize your private variables (url, chainId, etc)
  }

  /** disconect the client */
  public disconnect(): void {
    // TODO: based on your blockchain close the socket or call disconnect, etc
  }

  /** the chain ID this connection is connected to */
  public chainId(): ChainId {
    // TODO: get your chain id
    return myBlockchainChainId;
  }

  /** last block height from node*/
  public async height(): Promise<number> {
    // TODO: get last block height from blockchain node
    return myBlockchainHeight;
  }

  /** current account information or undefined */
  public async getAccount(query: AccountQuery): Promise<Account | undefined> {
    // TODO: based on input query, search the account in the blockchain
    // and get the address, pubkey and balance if exists
    return {address, pubkey, balance}
  }

  /** blockchain parameters */
  public async getAllTickers(): Promise<ReadonlyArray<BcpTicker>> {
    // TODO: use your blockchain constants here
    return { tokenTicker, tokenName, fractionalDigits };
  }

  /** nonce for the next transaction signature */
  public async getNonce(query: AddressQuery | PubkeyQuery): Promise<Nonce> {
    // TODO: calculate the nonce of the account
    return nonceOnMyBlockchain;
  }

  /** post new transaction in the blockchain */
  public async postTx(bytes: PostableBytes): Promise<PostTxResponse> {
    // TODO: send a transaction to your blockchain and wait the
    // confirmation
    return { blockInfo, transactionId }
  }
}