GitHub | Thinkium Developer Hub

# GitHub

Url address：https://github.com/ThinkiumGroup/web3j

# Env

JDK version: 1.8

Before performing all on-chain interaction interfaces, get the connection instance web3j firstly. The httpService parameter is the RPC address (note that version V2 is used).

protected static final Web3j web3j = Web3j.load(new HttpService("http://test.thinkiumrpc.net/v2"));

# base-chain-id

before use, speicify base-chain-id via following codes

Transaction.chainIdBase = 60000L; // in test environment
Transaction.chainIdBase = 70000; // in production environment

# 1. Get account balance(web3.GetAccount)

Request parameter:

name	type	required	description
chainId	int	true	chainId
address	string	true	The account address

Response parameters:

name	type	required	description
address	string	true	The account address
nonce	int	true	The number of previous transactions till now
balance	bigint	true	balance of account
storageRoot	string	false	Hash of storage data of contract(No contract returns null)
codeHash	string	false	The hash of the contract code(No contract returns null)

Example:

String chainId="2";
String address="0x2c7536e3605d9c16a7a3d7b1898e529396a65c23";
Map map=web3.GetAccount(chainId,address);
System.out.println(map);

Response:

{
  "address": "0x2c7536e3605d9c16a7a3d7b1898e529396a65c23",
  "balance": 1e+27,
  "codeHash": null,
  "nonce": 8,
  "storageRoot": null
}

# 2. Execute a Transaction on Chain(web3.SendTX)

Request parameter:：

name	type	required	description
chainId	string	true	chainId
fromChainId	string	true	The chain ID of the transaction sent
toChainId	string	true	The chain ID of the transaction accepted
from	string	true	The account address of transaction sent
to	string	true	The account address of transaction accepted
nonce	string	true	The number of previous transactions till now
value	string	true	transfer amount
input	string	true	arguments when the contract is called
sig	string	true	transaction signature
pub	string	true	public key

Response parameter :

name	type	required	description
TXhash	string	true	transaction hash

Sample request:

String chainId22="2";
String fromChainId="2";
String toChainId="2";
//Using the signature method
String sig="0x3c0c75b4dea8c8335475d462bd12dae9e746e3532c6a6b2791cafca565c6610a429fb7260e2f3c64b8e6eb090ee123db700ed2c5f0a4d9a314152f721f0a847101";
String pub="0x044e3b81af9c2234cad09d679ce6035ed1392347ce64ce405f5dcd36228a25de6e47fd35c4215d1edf53e6f83de344615ce719bdb0fd878f6ed76f06dd277956de";
String from="0x2c7536e3605d9c16a7a3d7b1898e529396a65c23";
String to="0x6ea0fefc17c877c7a4b0f139728ed39dc134a967";
String nonce="33";
String value="2333";
String input="";
int ExpireHeight=0;
Map mapresult=web3.SendTx(chainId22,fromChainId,toChainId,sig,pub,from,to,nonce,value,input,ExpireHeight);
System.out.println(mapresult);

Response:

response:
{
	"TXhash": "0x22024c2e429196ac76d0e557ac0cf6141f5b500c56fde845582b837c9dab236b"
}

# 3. Get the transaction detail by transaction hash(web3.GetTransactionByHash)

Request parameter:：

name	type	required	description
chainId	string	true	chainId
hash	string	true	transaction hash

Response parameter:

name	type	required	description
Transaction	dict	true	transaction detail
root	string	true	the current state of the account when the Receipt object was created
status	int	true	transaction Status: 1: Success, 0: Failure
logs	array[dict]	false	A group of log generated by this transaction
transactionHash	string	true	transaction hash
contractAddress	string	true	contract account address
out	string	true	the return data of calling

Transaction:

name	type	required	description
chainID	int	true	chainID
from	string	true	The account address of transaction sent
to	string	true	The account address of transaction accepted
nonce	string	true	The number of previous transactions till now
val	string	true	transfer amount
input	string	true	arguments when the contract is called

Sample request:

chainId="3";
String hash="0xb298a034848ea3fccf421824c9bc42d1525994843fcda67fd01ca66f16128ebe";
Map maptx=web3.GetTransactionByHash(chainId,hash);
System.out.println(maptx);

Response:

{
  "Transaction": {
    "chainID": 3,
    "from": "0x2c7536e3605d9c16a7a3d7b1898e529396a65c23",
    "input": "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",
    "nonce": 17,
    "to": "0x0000000000000000000000000000000000030000",
    "value": 0
  },
  "blockHeight": 280293,
  "contractAddress": "0x0000000000000000000000000000000000000000",
  "logs": null,
  "out": "0x3d8e3f6a5bf468075826c85d00b1c83ff3b1268f6e8fcbf4b1b090fc02a06021",
  "root": null,
  "status": 1,
  "transactionHash": "0x265954c4863005eba23c57d3fb321626979e3c34d84e3b8ae967719f7b3192e4"
}

# 4. Get the chain information(web3.getStats)

Request parameter:

name	type	required	description
chainId	string	true	chainId

Response parameter:

name	type	required	description
currentheight	bigint	true	the current height of blockchain
txcount	int	true	the total number of transactions
tps	int	true	transactions per second
tpsLastEpoch	int	true	transactions per seconds in the previous Epoch
lives	int	true	the lived duration of chain
accountcount	int	true	account number
epochlength	int	true	the number of blocks that current epoch contains
epochduration	int	true	the current epoch duration lasts
lastepochduration	int	true	the previous epoch duration lasts
currentcomm	array	true	the current committee member of this chain

Sample request:

ChainId="2";
Map mapstas=web3.GetStats(chainId);
System.out.println(mapstas);

Response:

{
  "accountcount": 0,
  "currentcomm": [
  "0x6e4a2f626a7d6dd082b713acdd3be49872097ab79f664f807095f665a50c68803688d1a242c8580ce6e8355468f666d1d43e3bdb0deebd0df17f97e1ea397355",
  "0xd1f889690f8c75bbada89a4c8893b8bf6fe29be3b5c3d8a2d772024a340d59d375f39ed88498666a57da10af885ad63a414f8a10153fb739eb1ebfcef57cc883",
  "0xa9d8dd87c9ece1787cbb16ba179df6d1d4b29580c03ae1da6e4634b154f8e2feb052fc1c07ca1e362f9b3e2b5f43822df9dd6578e782701de83afeca91a7b453"
  ],
  "currentheight": 280413,
  "epochduration": 202,
  "epochlength": 80,
  "lastepochduration": 202,
  "lives": 64362,
  "tps": 0,
  "tpsLastEpoch": 0,
  "txcount": 10
}

# 5. Gets the transactions of one account in a certain range height of chain (web3.GetTransactions)

Request parameter:

name	type	required	description
chainId	string	true	chainId
address	string	true	account address
startHeight	string	true	the start block height of the query
endHeight	string	true	the end block height of the query

Response parameter :

name	type	required	description
chainId	int	true	chainId
from	string	true	the account address of transaction sent
to	string	true	the account address of transaction accepted
nonce	int	true	the number of previous transactions till now
value	int	true	transfer amount
timestamp	int	true	the timestamp of the transaction
input	string	true	arguments when the contract is called
hash	string	true	transaction hash

Sample request:

String  chainIdtxs="2";
String  address_gettx="0x2c7536e3605d9c16a7a3d7b1898e529396a65c23";
String  startHeight="50";
String  endHeight="100";
JSONArray arr=web3.GetTransactions(chainIdtxs,address_gettx,startHeight,endHeight);
System.out.println(arr);

Response:

[
    {
        "chainId": 2,
        "from": "0x2c7536e3605d9c16a7a3d7b1898e529396a65c23",
        "to": "0x4b69a38eed4c24fb85ca79146d7c07392136e178",
        "nonce": 0,
        "value": 100000,
        "input": "0x",
        "hash": "0x473de49860222d0eb72a94544d31b87ecf5079f51f7dc619a61828ff8e903a0e",
        "timestamp": 1563332880
    }
]

# 6. Call Transaction（web3.CallTransaction）

Request parameter:

name	type	required	description
chainId	string	true	chainId
fromChainId	string	true	the chain ID of the The account address of transaction sent
toChainId	string	true	the chain ID address of the transaction acceptance account
from	string	true	the account address of transaction sent
to	string	true	the account address of transaction accepted
nonce	int	true	the number of previous transactions till now
value	int	true	transfer amount
input	string	true	arguments when the contract is called

Response parameter:

name	type	required	description
chainId	int	true	chainId
from	string	true	the account address of transaction sent
to	string	true	the account address of transaction accepted
nonce	int	true	the number of previous transactions till now
value	int	true	transfer amount
input	string	true	arguments when the contract is called
hash	string	true	transaction hash
timestamp	int	true	timestamp
root	string	true	the current state of the Account when the Receipt object was created
status	int	true	transaction status: 1: Success, 0: Failure
logs	array[dict]	true	a group of logs generated by this transaction
transactionHash	string	true	transaction hash
contractAddress	string	true	contract account address
out	string	true	the return data of calling
blockHeight	int	true	block height

Sample request:

Transaction info_call=new Transaction();
info_call.setChainId("2");
info_call.setFrom("0x0000000000000000000000000000000000000000");
info_call.setTo("0x0e50cea0402d2a396b0db1c5d08155bd219cc52e");
info_call.setNonce("15");
info_call.setValue("0");
info_call.setInput("0xdfc02018");
info_call.setFromChainId("2");
info_call.setToChainId("2");
Map calltrResult=web3.CallTransaction(info_call);
System.out.println(calltrResult);

Response:

{
  "Transaction":{
    "input":"0xdfc02018",
    "chainId":2,
    "from":"0x0000000000000000000000000000000000000000",
    "to":"0x0e50cea0402d2a396b0db1c5d08155bd219cc52e",
    "nonce":0,
    "value":0,
    "hash":"",
    "timestamp":0
  },
  "blockHeight":0,
  "root":"",
  "contractAddress":"0x0000000000000000000000000000000000000000",
  "logs":"",
  "transactionHash":"0xb5a31778f88df4816701e73d1cd67df8b836881766aeb93f3ba8c36bb37f7808",
  "status":1,
  "out":"0x"
}

# 7. Get the height of block(web3.GetBlockHeader)

Request parameter:

name	type	required	description
chainId	string	true	chainId
height	string	true	the block height of query

Response parameter:

name	type	required	description
hash	string	true	the hash of this block
previoushash	string	true	the hash of the parent block
chainid	int	true	chainid
height	int	true	block height of query
mergeroot	string	true	root hash of merging other chain transfered data
deltaroot	string	true	root hash of cross-chain transfered data
stateroot	string	true	root hash of state
txcount	int	true	the total number of transactions
timestamp	int	true	timestamp

Sample request:

String  height="30";
Map mapHeightr=web3.GetBlockHeader(chainId2,height);
System.out.println(mapHeightr);

Response:

{
  "hash": "0x71603186004fd46d32cda0780c4f4cf77ce13b396b1b8132b2c632173441b9d2",
  "previoushash": "0xd0f6e9c89eb6be655632911e3743b5a994423c3526653dc55b62ebea3ff56c43",
  "chainid": 2,
  "height": 30,
  "mergeroot": "0xdddfde85423a0d7da064c1b5a8cc1ff18d4a209027ef95ecceae0e6ed8f7c1af",
  "deltaroot": "0xdddfde85423a0d7da064c1b5a8cc1ff18d4a209027ef95ecceae0e6ed8f7c1af",
  "stateroot": "0x0b672749b02da6bf8f3aa50238140ce7fae5af3e926d4eb06d4cfb707a90702e",
  "txcount": 1,
  "timestamp": 1547777358
}

# 8. Gets the transaction of specified block(web3.getBlockTxs)

Request parameter:：

name	type	required	description
chainId	string	true	chainId
height	string	true	the block height of query
page	string	true	page number
size	string	true	the size of the page

Response parameter ：

name	type	required	description
elections	dict	true
accountchanges	array	true	information

accountchanges:

name	type	required	description
chainId	string	true	chainId
height	int	true	the starting block height of the query
from	string	true	the account address of transaction sent
to	string	true	the account address of transaction accepted
nonce	int	true	the number of previous transactions till now
value	int	true	transfer amount
timestamp	int	true	the timestamp of the transaction

Sample request:

String  height84="84";
String  page="1";
String  size="10";
Map maptxs=web3.GetBlockTxs(chainId2,height84,page,size);
System.out.println(maptxs);

Response:

{
  "elections": null,
  "accountchanges": [
    {
      "chainid": 2,
      "height": 30,
      "from": "0x4fa1c4e6182b6b7f3bca273390cf587b50b47311",
      "to": "0x4fa1c4e6182b6b7f3bca273390cf587b50b47311",
      "nonce": 30,
      "value": 1,
      "timestamp": 1547777358
    }
  ]
}

# 9 Call Contract Functions

//Generate：abi and bin Command：solc Greeter.sol --bin --abi --optimize -o ./output/ Solc Tool Download Address: https://github.com/ethereum/solidity/releases/tag/v0.4.25 Output Generated Directory : .abi and .bin

# 9.1 Deploy Contract(Contract.Deploy)

Request parameter:：

name	type	required	description
Transaction	Transaction	true	transaction entity model
binContent	string	true	the content of the generated bin file
parameters	List:Type	true	input parameters

Response parameter：

name	type	required	description
TXhash	string	true	transaction hash

Sample request:

//Deploy the contract
Map result= Contract.Deploy(info,binContent, Collections.emptyList());
System.out.println("sendtx result :" +result);
Thread.sleep(5000);    //Delay for 5 seconds

Response:

{
	"TXhash":"0xbcf864ce51279dbe23866c216a22e4cda4bde5464fb35f68ee9efca0c040e2e5"
}

# 9.2 Contract Tx Send -require consensus and modify the data state (Contract.Send)

Request parameter:：

name	type	required	description
Transaction	Transaction	true	transaction entity model
function	Function	true	function

Response parameter：

name	type	required	description
TXhash	string	true	transaction hash

Sample request:

Map resultSend= Contract.Send(info,function1);
System.out.println("resultSend : "+resultSend);

Response:

{
	"TXhash":"0xbcf864ce51279dbe23866c216a22e4cda4bde5464fb35f68ee9efca0c040e2e5"
}

# 9.3 contract call - get data from a local node(Contract.Call)

Request parameter:：

name	type	required	description
Transaction	Transaction	true	transaction entity model
function	Function	true	function

Response parameter：

name	type	required	description
Transaction	Transaction	true	transaction entity model
blockHeight	int	true	block height
root	string	true	the current state of the account when the Receipt object was created
contractAddress	string	true	contract address
logs	string	true	log
transactionHash	string	true	transaction hash
status	int	true	transation status: 1 success 0 failure
out	string	true	the return data of calling

Transaction:

name	type	required	description
chainId	string	true	chainId
from	string	true	the account address of transaction sent
to	string	true	the account address of transaction accepted
nonce	int	true	the number of previous transactions till now
value	int	true	transfer amount
timestamp	int	true	the timestamp of the transaction
input	string	true	arguments when the contract is called
hash	string	true	transaction hash

Sample request:

Map resultCall= Contract.Call(info,function);
System.out.println(resultCall);

Response:

{
  "Transaction":{
    "input":"0xcfae3217",
    "chainId":2,
    "from":"0x2c7536e3605d9c16a7a3d7b1898e529396a65c23",
    "to":"0xd39df28bd62f487a2272ce9df499167de16373bb",
    "nonce":345,
    "value":0,
    "hash":"",
    "timestamp":0
  },
  "blockHeight":0,
  "root":"",
  "contractAddress":"0x0000000000000000000000000000000000000000",
  "logs":"",
  "transactionHash":"0x06990881f0b8af53d4a8bdf386531c55373ceb043456c536250b3ea4f5160b33",
  "status":1,  		 		"out":"0x0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000a4772656574696e67732100000000000000000000000000000000000000000000"
}

# 10.web3.Ping

Request parameter:

name	type	required	description
address	string	true	ip+port

Response parameter:

name	type	required	description
nodeId	string	true	nodeId
version	string	true	versions
isDataNode	bool	true	if it's a data node
dataNodeOf	int	true	data node
lastMsgTime	int64	true	last information time
lastEventTime	int64	true	last event time
lastBlockTime	int64	true	last block time
overflow	bool	true	overflow
lastBlocks	map	true	the last block
opTypes	map	true	type

Sample request:

String ipAddress="192.168.1.7:22007";
Map mapPing=web3.Ping(ipAddress);
System.out.println(mapPing);

Response:

{
    "nodeId": "0x84385cc16d8e0a47909ee998d51370e5f56d7c85716e045c99760bedb180346da7d00b575ba23b76ffcd0969ae84e1e6b6943ec408f40b44825128577d8a895d",
    "version": "V1.0.0",
    "isDataNode": false,
    "dataNodeOf": 0,
    "lastMsgTime": 1563351861,
    "lastEventTime": 1563351861,
    "lastBlockTime": 1563351860,
    "overflow": false,
    "lastBlocks": {
        "0": 6889,
        "1": 6899,
        "2": 4176,
        "3": 5323,
        "4": 3299,
        "5": 4993,
        "6": 1199
    },
    "opTypes": {
        "0": [
            "SPEC"
        ],
        "2": [
            "SPEC"
        ],
        "3": [
            "COMM"
        ],
        "5": [
            "COMM"
        ]
    }
}

# 11. Proof of generation of cheque (web3.RpcMakeVccProof)

Request parameter:

name	type	required	description
chainId	string	true	chainId
fromChainId	string	true	the chainID of the The account address of transaction sent
toChainId	string	true	the ChainID of the The account address of transaction accepted
from	string	true	the account address of transaction sent
to	string	true	the account address of transaction accepted
nonce	string	true	the number of previous transactions till now
value	string	true	transfer amount
ExpireHeight	int	true	overdue height

Response parameter:

name	type	required	description
input	string	true	proof of the check

Sample request:

RpcMakeVccProof rpcInfo=new RpcMakeVccProof();
rpcInfo.setChainId("3");
rpcInfo.setFrom("0x2c7536e3605d9c16a7a3d7b1898e529396a65c23");
rpcInfo.setTo("0x4fa1c4e6182b6b7f3bca273390cf587b50b47311");
rpcInfo.setFromChainId("2");
rpcInfo.setToChainId("3");
rpcInfo.setValue("1");
rpcInfo.setExpireheight("284228");
rpcInfo.setNonce("10");
Map mapVccResult=web3.RpcMakeVccProoff(rpcInfo);
System.out.println(mapVccResult);

Response:

{
    "input": "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"
}

# 12. Proof of cancellation of cheque(web3.MakeCCCExistenceProof)

Request parameter:

name	type	required	description
chainId	string	true	chainId
fromChainId	string	true	the chainID of the The account address of transaction sent
toChainId	string	true	the ChainID of the The account address of transaction accepted
from	string	true	the account address of transaction sent
to	string	true	the account address of transaction accepted
nonce	string	true	the number of previous transactions till now
value	string	true	transfer amount
ExpireHeight	int	true	overdue height

Response parameter:

name	type	required	description
input	string	true	arguments when the contract is called
existence	bool	true	if cheque exists

Sample request:

MakeCCCExistenceProof parInfo=new MakeCCCExistenceProof();
parInfo.setChainId("3");
parInfo.setFrom("0x2c7536e3605d9c16a7a3d7b1898e529396a65c23");
parInfo.setTo("0x4fa1c4e6182b6b7f3bca273390cf587b50b47311");
parInfo.setFromChainId("3");
parInfo.setToChainId("3");
parInfo.setValue("1");
parInfo.setExpireheight("33772");
parInfo.setNonce("9");
Map mapccc=web3.MakeCCCExistenceProof(parInfo);
System.out.println(mapccc);

Response:

{
    "existence": false,
    "input": "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"
}

# 13.Get chain structure（web3.GetChainInfo）

Request parameter:

name	type	required	description
chainIds	[]int	true	chainId（tip：null will return all）

Response parameter:

name	type	required	description
[]	[]chainInfo	true	chain information array

chainInfo：

name	type	required	description
chainId	int	true	chainId
datanodes	[]dataNode	true	data node group
mode	int	true	mode
parent	int	true	parent

dataNode：

name	type	required	description
dataNodeId	int	true	data node id
dataNodeIp	string	true	data node IP
dataNodePort	int	true	data node port

Sample request:

JSONArray result_ChainInfo=web3.GetChainInfo();
System.out.println(result_ChainInfo);

Response:

[
  {
    "chainId": 0,
    "datanodes": [
      {
      "dataNodeId": "0x5e17128ba224a96d6e84be0c7f899febea26c55c78940610d78a0d22dbd0ab03cc3233491de0b5eb770dbf850b509bd191723df4fc40520bcbab565d46543d6e",
      "dataNodeIp": "192.168.1.13",
      "dataNodePort": 22010
      }
    ],
    "mode": 5,
    "parent": 1048576
  },
  {
    "chainId": 1,
    "datanodes": [
      {
        "dataNodeId": "0x96dc94580e0eadd78691807f6eac9759b9964daa8b46da4378902b040e0eb102cb48413308d2131e9e5557321f30ba9287794f689854e6d2e63928a082e79286",
        "dataNodeIp": "192.168.1.13",
        "dataNodePort": 22014
      }
    ],
    "mode": 6,
    "parent": 0
  },
  {
    "chainId": 2,
    "datanodes": [
      {
        "dataNodeId": "0xa93b150f11c422d8700554859281be8e34a91a859e0e021af186002c7e4a2661ea2467a63b417030d68e2fdddeb4342943dff13225da77124abf912fd092f71f",
        "dataNodeIp": "192.168.1.13",
        "dataNodePort": 22018
      }
    ],
    "mode": 6,
    "parent": 0
  },
  {
    "chainId": 3,
    "datanodes": [
      {
        "dataNodeId": "0x783f4b2490461ecfd8ee8d3451e434de06bacb0ffff56de53a33fe545589094fa0b929eeaa62dc5203d1e831ccdd37d206d0b85b193921efb223bf0cb2f37b4c",
        "dataNodeIp": "192.168.1.13",
        "dataNodePort": 22022
      }
    ],
    "mode": 7,
    "parent": 1
  },
  {
    "chainId": 4,
    "datanodes": [
      {
        "dataNodeId": "0x44c98ab831f3ca4553e491bba06753e959ceb55d43e18bc76539572feb1e0dbaf2fbfc19f571d6544e82be1c7c39760f6a023d4be4dcb9473dd580c731d03926",
        "dataNodeIp": "192.168.1.13",
        "dataNodePort": 22026
      }
    ],
    "mode": 7,
    "parent": 1
  }
]

# 14.Get information of committee members(web3.GetCommittee）

Request parameter:

name	type	required	description
chainId	string	true	chainId
epoch	string	true	Epoch rounds

Response parameter:

name	type	required	description
chainId	int	true	chainId
MemberDetails	[]string	true	details of the committee
Epoch	int	true	epoch rounds

Sample request:

String epoch="1";
String chainId3="3";
JSONArray result_CommitteeInfo=web3.GetCommittee(chainId3,epoch);
System.out.println(result_CommitteeInfo);

Response:

[       "0xfbcd643db7f1812d71f7fb66a9b6c7b877d4b44e707b5788ca041003e7f671c85f88ee79d0642fbd1294b2140e3ef5414b3bb125b92dab11696788a66f949a91",
          "0x79d260d785858034d64641b9a5867bd08e3f6cae9a3f18e09dfd1a238808b97093d74a8f1a15d9cbab68b005383a2637cce73110f3dfb5faea0a7c371f0976b9",
          "0x7f17a336b3005ef9fed2baabcdc08b31cfcd72ea84acd34b4b468d4b527d0628978ab0e541c5fe1e04d0ad01a7d892ece8920f90e12b8a55c79933167786a196",
          "0x6b81e535a8f7b0a3ed746d46e6e1248ebf001650c078f27056a20f00a2c9d3c369865872ba01dcf95485b3dfcfd921a6239b6690166e47ec47ade0e6aea593c1"
]

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