simple-web3-php

A php interface for interacting with the Ethereum blockchain and ecosystem.

Features

• PHP >= 7.4
• Customizable curl calls
• Call: get net state
• Send signed transactions
• Batch call requests and signed transactions
• Address & private key creation
• Message signing
• Full ABIv2 encode/decode
• Contract creation
• Contract interaction (call/send)
• Contract Events/logs with filters
• Support for ERC20 contracts with non-nominative decimal values
• Examples provided interacting with simple types, strings, tuples, arrays, arrays of tuples with arrays, multi-dimension arrays...

Install

Latest stable release

composer require drlecks/simple-web3-php "^0.10.0"

Or you can add this line in composer.json

"drlecks/simple-web3-php": "^0.10.0"

Development (main branch)

composer require drlecks/simple-web3-php dev-master

Or you can add this line in composer.json

"drlecks/simple-web3-php": "dev-master"

Usage

New instance

use SWeb3\SWeb3;
//initialize SWeb3 main object
$sweb3 = new SWeb3('http://ethereum.node.provider:optional.node.port');

//optional if not sending transactions
$from_address = '0x0000000000000000000000000000000000000000';
$from_address_private_key = '345346245645435....';
$sweb3->setPersonalData($from_address, $from_address_private_key);

Convert values

• Most calls return hex or BigNumber to represent numbers.
• Most calls expect numeric parameters represented as BigNumbers.

Hex to Big Number:

use SWeb3\Utils;
 
$res = $sweb3->call('eth_blockNumber', []);
$bigNum = Utils::hexToBn($res->result);

Number to BigNumber:

$bigNum = Utils::ToBn(123);

Get average-human readable string representation from Big Number:

$s_number = $bigNum->toString();

Format 1 ether to wei (unit required for ether values in transactions):

Utils::toWei('0.001', 'ether');

Get average-human readable string representation from a value conversion:

$s_val = Utils::fromWeiToString('1001', 'kwei'); // "1.001"

$s_val = Utils::toWeiString('1.001', 'kwei'); // "1001"

General ethereum block information call:

$res = $sweb3->call('eth_blockNumber', []);

Refresh gas price

$gasPrice = $sweb3->getGasPrice();

Estimate gas price (from send params)

$sweb3->chainId = '0x3';//ropsten 
$sendParams = [ 
    'from' =>	$sweb3->personal->address,  
    'to' =>     '0x1111111111111111111111111111111111111111', 
    'value' => 	Utils::toWei('0.001', 'ether'),
    'nonce' => 	$sweb3->personal->getNonce()  
]; 
$gasEstimateResult = $sweb3->call('eth_estimateGas', [$sendParams]);

Send 0.001 ether to address

//remember to set personal data first with a valid pair of address & private key
$sendParams = [ 
    'from' =>   	$sweb3->personal->address,  
    'to' =>     	'0x1111111111111111111111111111111111111111', 
    'gasLimit' => 	210000,
    'value' => 		Utils::toWei('0.001', 'ether'),
    'nonce' => 		$sweb3->personal->getNonce()
];    
$result = $sweb3->send($sendParams); 

Batch calls & transactions

//enable batching
$sweb3->batch(true);

$sweb3->call('eth_blockNumber', []); 
$sweb3->call('eth_getBalance', [$sweb3->personal->address, 'latest']);

//execute all batched calls in one request
$res = $sweb3->executeBatch();

//batching has to be manually disabled
$sweb3->batch(false); 

Account

use SWeb3\Accounts; 
use SWeb3\Account;

//create new account privateKey/address (returns Account)
$account = Accounts::create();

//retrieve account (address) from private key 
$account2 = Accounts::privateKeyToAccount('...private_key...');

//sign message with account
$res = $account2->sign('Some data'); 

Contract interaction

use SWeb3\SWeb3_Contract;

$contract = new SWeb3_contract($sweb3, '0x2222222222222222222222222222222222222222', '[ABI...]'); //'0x2222...' is contract address
  
// call contract function
$res = $contract->call('autoinc_tuple_a');

// change function state
//remember to set the sign values and chain id first: $sweb3->setPersonalData() & $sweb3->chainId
$extra_data = ['nonce' => $sweb3->personal->getNonce()]; 
$result = $contract->send('Set_public_uint', 123,  $extra_data);

Contract events (logs)

//optional parameters fromBlock, toBlock, topics
//default values -> '0x0', 'latest', null (all events/logs from this contract) 
$res = $contract->getLogs();

Contract creation (deployment)

use SWeb3\SWeb3_Contract;
 
$creation_abi = '[abi...]';
$contract = new SWeb3_contract($sweb3, '', $creation_abi);

//set contract bytecode data
$contract_bytecode = '123456789....';
$contract->setBytecode($contract_bytecode);

//remember to set the sign values and chain id first: $sweb3->setPersonalData() & $sweb3->chainId
$extra_params = ['nonce' => $sweb3->personal->getNonce()];  
$result = $contract->deployContract( [123123],  $extra_params); 

Usual required includes

use SWeb3\SWeb3;                            //always needed, to create the Web3 object
use SWeb3\Utils;                            //sweb3 helper classes (for example, hex conversion operations)
use SWeb3\SWeb3_Contract;                   //contract creation and interaction
use SWeb3\Accounts;                   		//account creation
use SWeb3\Account;                   		//single account management (signing)
use phpseclib\Math\BigInteger as BigNumber; //BigInt handling
use stdClass;                               //for object interaction 

Provided Examples

In the folder Examples/ there are some extended examples with call & send examples:

• example.call.php
• example.send.php
• example.batch.php
• example.account.php
• example.contract_creation.php
• example.erc20.php

Example configuration

To execute the examples you will need to add some data to the configuration file (example.config.php).

The example is pre-configured to work with an infura endpoint:

define('INFURA_PROJECT_ID', 'XXXXXXXXX');
define('INFURA_PROJECT_SECRET', 'XXXXXXXXX');
define('ETHEREUM_NET_NAME', 'ropsten'); //ropsten , mainnet

define('ETHEREUM_NET_ENDPOINT', 'https://'.ETHEREUM_NET_NAME.'.infura.io/v3/'.INFURA_PROJECT_ID); 

Just add your infura project keys. If you have not configured the api secret key requisite, just ignore it.

If you are using a private endpoint, just ignore all the infura definitions:

define('ETHEREUM_NET_ENDPOINT', 'https://123.123.40.123:1234'); 

To enable contract interaction, set the contract data (address & ABI). The file is preconfigured to work with our example contract, already deployed on ropsten.

//swp_contract.sol is available on ropsten test net, address: 0x706986eEe8da42d9d85997b343834B38e34dc000
define('SWP_Contract_Address','0x706986eEe8da42d9d85997b343834B38e34dc000'); 
$SWP_Contract_ABI = '[...]';
define('SWP_Contract_ABI', $SWP_Contract_ABI);

To enable transaction sending & signing, enter a valid pair of address and private key. Please take this advises before continuing:

• The address must be active on the ropsten network and have some ether available to send the transactions.
• Double check that you are using a test endpoint, otherwise you will be spending real eth to send the transactions
• Be sure to keep your private key secret!

//SIGNING
define('SWP_ADDRESS', 'XXXXXXXXXX');
define('SWP_PRIVATE_KEY', 'XXXXXXXXXX');

Example contract

The solidity contract used in this example is available too in the same folder: swp_contract.sol

Example disclaimer

Don't base your code structure on this example. This example does not represent clean / efficient / performant aproach to implement them in a production environment. It's only aim is to show some of the features of Simple Web3 Php.

Modules

• Utils library forked & extended from web3p/web3.php
• Transaction signing: kornrunner/ethereum-offline-raw-tx
• sha3 encoding: from kornrunner/keccak
• BigNumber interaction: phpseclib\Math
• Asymetric key handling: simplito/elliptic-php

TODO

• Node accounts creation / interaction

License

MIT

DONATIONS (ETH)

0x4a890A7AFB7B1a4d49550FA81D5cdca09DC8606b