src/blockchain/src/domain/Blockchain.js
/**
   * Validate the container
   *
   * @return {boolean} Whether the chain is valid
   */
Validate the container
@return {boolean} Whether the chain is valid
Validate the container @return { boolean } Whether the chain is valid
isValid() {
    return Success.of(this.height() > 0)
  }
isValid ( ) { return Success . of ( this . height ( ) > 0 ) }
Validate the container
 @return {boolean} Whether the chain is valid
Validate the container @return { boolean } Whether the chain is valid
// Maybe: add to check all block indeces for uniqueness