Invoke Transaction to Query Data - Development Guide| Alibaba Cloud Documentation Center

Invoke the smart contract to query the data in the blockchain network.

API

POST /api/v1/networks/{network}/transactions/query

Url Path Args	Description
network	Fabric channel name

Request Parameter

URL Query

URL Query Args	Type	Required	Description
timeout	Integer	False	Maximum wait time in seconds to confirm whether submitted transaction is success(valid) or not. Default is 180.

Body

Content-Type: application/json

Name	Type	Required	Description
chaincode	String	True	The Name of target smart contract
args	List<String>	False	The arguments list of the smart contract call. When this parameter(args) is not empty, the function and byte_args parameters are ignored.
function	String	False	The name of smart contract function to call
byte_args	List<String>	False	Base64-encoded smart contract call arguments (without function name)
transient	Map<String, String>	False	The transient map of this call, Key is the name, and Value is data
byte_transient	Map<String, String>	False	The transient map of this call, Key is the name, and Value is base64-encoded data(this parameter will merge with transient and overrides the Key in it)

Response

Name	Type	Description
Success	Boolean	Indicating if the request was successful.
Error	Error	-
Result	Response	-

Error

Name	Type	Description
code	Integer	Error code
message	String	Error description
request_id	String	The id of this request

Response

Name	Type	Description
id	String	Transaction ID
status	String	Status code returned by smart contract
event	List<Event>	List of blockchain events generated by the transaction
data	String	Base64-encoded data returned by smart contract

Event

Name	Type	Description
id	String	Event ID, unique within the channel
name	String	Event name
type	EventType	Event type(“Tx”, “Config”, “Contract”, “Block”), here is always “Contract”
content	String	When EventType is “Contract”, it is Base64 encoded event content

Examples

Request Example

 
  curl -X POST "http://your.gateway.endpoint/api/v1/networks/channel3/transactions/query" -H "accept: application/json" -H "Authorization: Bearer <Your Access Token>" -H "Content-Type: application/json" -d "{\"chaincode\":\"sacc\",\"args\":[\"get\",\"provider\"],\"transients\":{\"key\":\"value\"}}"

Example of Normal Return

 
  {
    "Success": true,
    "Result": {
      "id": "3f850796a57db7178f8e367cce736a228a8e77544ef5c92a564f9cf0ad8893c4",
      "status": "200",
      "events": [],
      "data": "YWxpeXVuMQ=="
    },
    "Error": {
      "code": 200,
      "message": "Success",
      "request_id": "5640793d-219e-4e2f-9725-988ce11ee6b6"
    }
  }

Error Code

Please refer to Error Code