aelf-sdk.php - AELF PHP API

Introduction

aelf-sdk.php for aelf is like web.js for ethereum.

aelf-sdk.php is a collection of libraries which allow you to interact with a local or remote aelf node, using a HTTP connection.

The following documentation will guide you through installing and running aelf-sdk.php, as well as providing a API reference documentation with examples.

If you need more information you can check out the repo : aelf-sdk.php)

Adding AElf php SDK

In order to install this library via composer run the following command in the console:

$ composer require aelf/aelf-sdk dev-dev

composer require curl/curl

If you directly clone the sdk You must install composer and execute it in the root directory

"aelf/aelf-sdk": "dev-dev"

Examples

You can also see full examples in ./test;

1. Create instance

Create a new instance of AElf, connect to an AELF chain node. Using this instance, you can call the APIs on AElf.

require_once 'vendor/autoload.php';
use AElf\AElf;
$url = '127.0.0.1:8000';
$aelf = new AElf($url);

2. Get a system contract address

Get a system contract address, take AElf.ContractNames.Token as an example

require_once 'vendor/autoload.php';
use AElf\AElf;
$url = '127.0.0.1:8000';
$aelf = new AElf($url);

$privateKey = 'cd86ab6347d8e52bbbe8532141fc59ce596268143a308d1d40fedf385528b458';
$bytes = new Hash();
$bytes->setValue(hex2bin(hash('sha256', 'AElf.ContractNames.Token')));
$contractAddress = $aelf->GetContractAddressByName($privateKey, $bytes);

3. Send a transaction

Get the contract address, and then send the transaction.

require_once 'vendor/autoload.php';
use AElf\AElf;
$url = '127.0.0.1:8000';
// create a new instance of AElf
$aelf = new AElf($url);

// private key
$privateKey = 'cd86ab6347d8e52bbbe8532141fc59ce596268143a308d1d40fedf385528b458';

$aelfEcdsa = new BitcoinECDSA();
$aelfEcdsa->setPrivateKey($privateKey);
$publicKey = $aelfEcdsa->getUncompressedPubKey();
$address = $aelfEcdsa->hash256(hex2bin($publicKey));
$address = $address . substr($aelfEcdsa->hash256(hex2bin($address)), 0, 8);
// sender address
$base58Address = $aelfEcdsa->base58_encode($address);

// transaction input
$params = new Hash();
$params->setValue(hex2bin(hash('sha256', 'AElf.ContractNames.Vote')));

// transaction method name
$methodName = "GetContractAddressByName";

// transaction contract address
$toAddress = $aelf->getGenesisContractAddress();

// generate a transaction
$transactionObj = aelf->generateTransaction($base58Address, $toAddress, $methodName, $params);

//signature
$signature = $aelf->signTransaction($privateKey, $transactionObj);
$transactionObj->setSignature(hex2bin($signature));

// obj Dto
$executeTransactionDtoObj = ['RawTransaction' => bin2hex($transaction->serializeToString())];

$result = $aelf->sendTransaction($executeTransactionDtoObj);
print_r($result);

Web API

You can see how the Web Api of the node works in ``{chainAddress}/swagger/index.html``

tip: for an example, my local address: ‘http://127.0.0.1:1235/swagger/index.html’

The usage of these methods is based on the AElf instance, so if you don’t have one please create it:

require_once 'vendor/autoload.php';
use AElf\AElf;
$url = '127.0.0.1:8000';
// create a new instance of AElf
$aelf = new AElf($url);

1. getChainStatus

Get the current status of the block chain.

Web API path

/api/blockChain/chainStatus

Parameters

Empty

Returns

Array
- ChainId - String
- Branches - Array
- NotLinkedBlocks - Array
- LongestChainHeight - Integer
- LongestChainHash - String
- GenesisBlockHash - String
- GenesisContractAddress - String
- LastIrreversibleBlockHash - String
- LastIrreversibleBlockHeight - Integer
- BestChainHash - String
- BestChainHeight - Integer

Example

// create a new instance of AElf
$aelf = new AElf($url);

$chainStatus = $aelf->getChainStatus();
print_r($chainStatus);

2. getBlockHeight

Get current best height of the chain.

Web API path

/api/blockChain/blockHeight

Parameters

Empty

Returns

Integer

Example

$aelf = new AElf($url);

$height = $aelfClient->GetBlockHeight();
print($height);

3. getBlock

Get block information by block hash.

Web API path

/api/blockChain/block

Parameters

block_hash - String
include_transactions - Boolean :
- true require transaction ids list in the block
- false Doesn’t require transaction ids list in the block

Returns

Array
- BlockHash - String
- Header - Array
  - PreviousBlockHash - String
  - MerkleTreeRootOfTransactions - String
  - MerkleTreeRootOfWorldState - String
  - Extra - List
  - Height - Integer
  - Time - String
  - ChainId - String
  - Bloom - String
  - SignerPubkey - String
- Body - Array
  - TransactionsCount - Integer
  - Transactions - Array
    - transactionId - String

Example

$aelf = new AElf($url);

$block = $aelf->getBlockByHeight(1, true);
$block2 = $aelf->getBlockByHash($block['BlockHash'], false);
print_r($block2);

4. getBlockByHeight

Web API path

/api/blockChain/blockByHeight

Get block information by block height.

Parameters

block_height - Number
include_transactions - Boolean :
- true require transaction ids list in the block
- false Doesn’t require transaction ids list in the block

Returns

Array
- BlockHash - String
- Header - Array
  - PreviousBlockHash - String
  - MerkleTreeRootOfTransactions - String
  - MerkleTreeRootOfWorldState - String
  - Extra - List
  - Height - Integer
  - Time - String
  - ChainId - String
  - Bloom - String
  - SignerPubkey - String
- Body - Array
  - TransactionsCount - Integer
  - Transactions - Array
    - transactionId - String

Example

$aelf = new AElf($url);

$block = $aelf->getBlockByHeight(1, true);
print_r($block);

5. getTransactionResult

Get the result of a transaction

Web API path

/api/blockChain/transactionResult

Parameters

transactionId - String

Returns

Object
- TransactionId - String
- Status - String
- Logs - Array
  - Address - String
  - Name - String
  - Indexed - Array
  - NonIndexed - String
- Bloom - String
- BlockNumber - Integer
- Transaction - Array
  - From - String
  - To - String
  - RefBlockNumber - Integer
  - RefBlockPrefix - String
  - MethodName - String
  - Params - json
  - Signature - String
- ReadableReturnValue - String
- Error - String

Example

$aelf = new AElf($url);

$block = $aelf->getBlockByHeight(1, true);
$transactionResult = $aelf->getTransactionResult($block['Body']['Transactions'][0]);
print_r('# get_transaction_result');
print_r($transactionResult);

6. getTransactionResults

Get multiple transaction results in a block

Web API path

/api/blockChain/transactionResults

Parameters

blockHash - String
offset - Number
limit - Number

Returns

List - The array of method descriptions:
- the transaction result object

Example

$aelf = new AElf($url);

$block = $aelf->getBlockByHeight(1, true);
$transactionResults = $aelf->getTransactionResults($block['Body']);
print_r($transactionResults);

7. getTransactionPoolStatus

Get the transaction pool status.

Web API path

/api/blockChain/transactionPoolStatus

Example

$aelf = new AElf($url);

$status = $aelf->getTransactionPoolStatus();
print_r($status);

8. sendTransaction

Broadcast a transaction

Web API path

/api/blockChain/sendTransaction

POST

Parameters

transaction - String - Serialization of data into String

Example

$aelf = new AElf($url);

$params = new Hash();
$params->setValue(hex2bin(hash('sha256', 'AElf.ContractNames.Vote')));
$transaction = buildTransaction($aelf->getGenesisContractAddress(), 'GetContractAddressByName', $params);
$executeTransactionDtoObj = ['RawTransaction' => bin2hex($transaction->serializeToString())];
$result = $aelf->sendTransaction($executeTransactionDtoObj);
print_r($result);

9. sendTransactions

Broadcast multiple transactions

Web API path

/api/blockChain/sendTransaction

POST

Parameters

transactions - String - Serialization of data into String

Example

$aelf = new AElf($url);

$paramsList = [$params1, $params2];
$rawTransactionsList = [];
foreach ($paramsList as $param) {
    $transactionObj = buildTransaction($toAddress, $methodName, $param);
    $rawTransactions = bin2hex($transactionObj->serializeToString());
    array_push($rawTransactionsList, $rawTransactions);
}
$sendTransactionsInputs = ['RawTransactions' => implode(',', $rawTransactionsList)];
$listString = $this->aelf->sendTransactions($sendTransactionsInputs);
print_r($listString);

10. getPeers

Get peer info about the connected network nodes

Web API path

/api/net/peers

Example

$aelf = new AElf($url);

print_r($aelf->getPeers(true));

11. addPeer

Attempts to add a node to the connected network nodes

Web API path

/api/net/peer

POST

Parameters

peer_address - String - peer’s endpoint

Example

$aelf = new AElf($url);

$aelf->addPeer($url);

12. removePeer

Attempts to remove a node from the connected network nodes

Web API path

/api/net/peer?address=

POST

Parameters

peer_address - String - peer’s endpoint

Example

$aelf = new AElf($url);

$aelf->removePeer($url);

13. createRawTransaction

create a raw transaction

Web API path

/api/blockchain/rawTransaction

POST

Parameters

transaction - Array

Returns

Array
- RawTransaction - hex string bytes generated by transaction information

Example

$aelf = new AElf($url);

$status = $aelf->getChainStatus();
$params = base64_encode(hex2bin(hash('sha256', 'AElf.ContractNames.Consensus')));
$param = array('value' => $params);
$transaction = [
    "from" => $aelf->getAddressFromPrivateKey($privateKey),
    "to" => $aelf->getGenesisContractAddress(),
    "refBlockNumber" => $status['BestChainHeight'],
    "refBlockHash" => $status['BestChainHash'],
    "methodName" => "GetContractAddressByName",
    "params" => json_encode($param)
];
$rawTransaction = $aelf->createRawTransaction($transaction);
print_r($rawTransaction);

14. sendRawTransaction

send raw transactions

Web API path

/api/blockchain/sendRawTransaction

Parameters

Transaction - raw transaction
Signature - signature
ReturnTransaction - indicates whether to return transaction

Example

$aelf = new AElf($url);

$rawTransaction = $aelf->createRawTransaction($transaction);
$transactionId = hash('sha256', hex2bin($rawTransaction['RawTransaction']));
$sign = $aelf->getSignatureWithPrivateKey($privateKey, $transactionId);
$transaction = array('Transaction' => $rawTransaction['RawTransaction'], 'signature' => $sign, 'returnTransaction' => true);
$execute = $aelf->sendRawTransaction($transaction);
print_r($execute);

15. executeRawTransaction

execute raw transactions

Web API path

/api/blockchain/executeRawTransaction

Post

Parameters

RawTransaction - raw transaction
Signature - signature

Example

$aelf = new AElf($url);

$rawTransaction = $aelf->createRawTransaction($transaction);
$transactionId = hash('sha256', hex2bin($rawTransaction['RawTransaction']));
$sign = $aelf->getSignatureWithPrivateKey($privateKey, $transactionId);
$transaction = array('RawTransaction' => $rawTransaction['RawTransaction'], 'signature' => $sign);
$execute = $aelf->executeRawTransaction($transaction);
print_r($execute);

16. getMerklePathByTransactionId

get merkle path

Web API path

/api/blockchain/merklePathByTransactionId?transactionId=

Parameters

transactionId - String

Example

$aelf = new AElf($url);

$block = $aelf->getBlockByHeight(1, true);
$merklePath = $aelf->getMerklePathByTransactionId($block['Body']['Transactions'][0]);

17. calculateTransactionFee

Estimate transaction fee

Web API path

/api/blockChain/calculateTransactionFee

POST

Parameters

CalculateTransactionFeeInput - Object - The object with the following structure :
- RawTransaction - String

Returns

CalculateTransactionFeeOutput - Object - The object with the following structure :
- Success - Bool
- TransactionFee - Array
- ResourceFee - Array

Example

$aelf = new AElf($url);
$calculateTransactionFeeInputParam = [
    "rawTransaction" => $rawTransactionInput,
];
$result = $this->aelf->calculateTransactionFee($calculateTransactionFeeInputParam);
print_r($result);

18. getNetworkInfo

get network information

Web API path

/api/net/networkInfo

Example

$aelf = new AElf($url);

print_r($aelf->getNetworkInfo());

19. getContractFileDescriptorSet

get contract file descriptor set

Web API path

/api/blockChain/contractFileDescriptorSet

Example

$aelf = new AElf($url);

$blockDto = $aelf->getBlockByHeight($blockHeight, false);
$transactionResultDtoList = $aelf->getTransactionResults($blockDto['BlockHash'], 0, 10);
foreach ($transactionResultDtoList as $v) {
  $request = $aelf->getContractFileDescriptorSet($v['Transaction']['To']);
  print_r($request);
}

20. getTaskQueueStatus

get task queue status

Web API path

/api/blockChain/taskQueueStatus

Example

$aelf = new AElf($url);

$taskQueueStatus = $aelf->getTaskQueueStatus();
print_r($taskQueueStatus);

21. executeTransaction

execute transaction

Web API path

Post

/api/blockChain/executeTransaction

Example

$aelf = new AElf($url);

$methodName = "GetNativeTokenInfo";
$bytes = new Hash();
$bytes->setValue(hex2bin(hash('sha256', 'AElf.ContractNames.Token')));
$toAddress = $aelf->GetContractAddressByName($privateKey, $bytes);
$param = new Hash();
$param->setValue('');
$transaction = $aelf->generateTransaction($fromAddress, $toAddress, $methodName, $param);
$signature = $aelf->signTransaction($privateKey, $transaction);
$transaction->setSignature(hex2bin($signature));
$executeTransactionDtoObj = ['RawTransaction' => bin2hex($transaction->serializeToString())];
$response = $aelf->executeTransaction($executeTransactionDtoObj);
$tokenInfo = new TokenInfo();
$tokenInfo->mergeFromString(hex2bin($response));

Other Tool Kit

AElf supply some APIs to simplify developing.

1. getChainId

get chain id

$aelf = new AElf($url);

$chainId = $aelf->getChainId();
print_r($chainId);

2. generateTransaction

generate a transaction object

$aelf = new AElf($url);

$param = new Hash();
$param->setValue('');
$transaction = $aelf->generateTransaction($fromAddress, $toAddress, $methodName, $param);

3. signTransaction

sign a transaction

$aelf = new AElf($url);

$transaction = $aelf->generateTransaction($fromAddress, $toAddress, $methodName, $param);
$signature = $aelf->signTransaction($privateKey, $transaction);

4. getGenesisContractAddress

get the genesis contract’s address

$aelf = new AElf($url);

$genesisContractAddress = $aelf->getGenesisContractAddress();
print_r($genesisContractAddress);

5. getAddressFromPubKey

calculate the account address accoriding to the public key

$aelf = new AElf($url);

$pubKeyAddress = $aelf->getAddressFromPubKey('04166cf4be901dee1c21f3d97b9e4818f229bec72a5ecd56b5c4d6ce7abfc3c87e25c36fd279db721acf4258fb489b4a4406e6e6e467935d06990be9d134e5741c');
print_r($pubKeyAddress);

6. getFormattedAddress

convert the Address to the displayed string：symbol_base58-string_base58-string-chain-id.

$aelf = new AElf($url);

$addressVal = $aelf->getFormattedAddress($privateKey, $base58Address);
print_r($addressVal);

7. generateKeyPairInfo

generate a new key pair using ECDSA

$aelf = new AElf($url);

$pairInfo = $aelf->generateKeyPairInfo();
print_r($pairInfo);

8. getContractAddressByName

get contract’s address from its name

$aelf = new AElf($url);

$bytes = new Hash();
$bytes->setValue(hex2bin(hash('sha256', 'AElf.ContractNames.Token')));
$contractAddress = $aelf->GetContractAddressByName($privateKey, $bytes);
print_r($contractAddress);

9. getAddressFromPrivateKey

get address from a private key

$aelf = new AElf($url);

$address = $aelf->getAddressFromPrivateKey($privateKey);
print_r($address);

10. getSignatureWithPrivateKey

given a private key, get the signature

$aelf = new AElf($url);

$sign = $aelf->getSignatureWithPrivateKey($privateKey, $transactionId);
print_r($sign);

11. isConnected

check if it connects the chain

$aelf = new AElf($url);

$isConnected = $this->aelf->isConnected();
print_r($isConnected);

12. getTransactionFees

get the transaction fee from transaction result

$aelf = new AElf($url);

$block = $aelf->getBlockByHeight(1, true);
$transactionResult = $aelf->getTransactionResult($block['Body']['Transactions'][0]);
$transactionFees = $aelf->getTransactionFees($transactionResult);
print_r($transactionFees);

AElf.version

$aelf = new AElf($url);

$version = $aelf->version;

Requirements

php

About contributing

Read out [contributing guide]

About Version

https://semver.org/