## Properties

 - `api` : uri of api server
    
## Constructor

 - `new API(api)` : create new instance API
   
## Methods

 - `getBlock(blockHeight)`
    + Parameters: 
        + block: height of block  
    + Returns: 
        + Success:(Promise) block at height
        + Other: Error
        
        
 - `getTransaction(txHash)`
 
    + Parameters:
        + txHash: hash of transaction.
        
    + Returns:
        + Success:(Promise) The transaction has transaction hash as input. 
        + Other: Error
        
 - `getAccountDetail(address)`
    + Parameters:
        + address: address of account (hex string, length = 40)
    + Returns: 
        + Success: details of account has address as input.
        + Other: Error
        
 - `getGetHistoryTransaction({address, page, limit = 10})`
    + Parameters
        + address: address want to get history
        + page: number of pages
        + limit: default is 10, amount of transactions will be returned in response.
    + Returns:
        + Success:(Promise) transactions of address.
        + Other: Error
         
 - `getSequence(address)`
    + Parameters:
        + address: address of account wants to get sequence number.
    + Returns:
        + Success: (Promise) sequence of address.
        + Other: Error
         
 - `getBalance(address)`
    + Parameters:
        + address: address of account wants to get balance.
    + Returns:
        + Success: (Promise) balance of address.
        + Other: Error
        
 - `getPermission(address)`
    + Parameters:
        + address: address wants to get permission.
    + Returns:
        + Success: (Promise) permission of address.
        + Other: Error
        
 - `getParams(method, body, headers, uri)` : static function
    + Parameters:
        + method: method of request( GET, POST, ...)
        + body: body of request
        + headers: header of request
        + uri: uri of request.
    + Returns:
        + Success: request as a JSON.
        
 - `sendTransaction(tx)`
    + Parameters:
        + tx: transaction will be sent to blockchain network.
    + Returns:
        + Success: (Promise) transaction hash of transaction.
        + Other: Error

 - `getTransactionFee()`
    + Parameters:
    + Returns:
        + Success: (Promise) fee and address of receiver.
        + Other: Error
        
 - `requestAPI(endpoint, method, body, headers)`
    + Parameters: 
        + endpoint: request will be sent to endpoint
        + method: method of request (GET, POST)
        + body: body of request
        + headers: headers of request
    + Returns:
        + Success: response of request
        + Other: Error
        
## Source code
 - [code](#)