[call contract function balanceOf] get balance of tokens

[quangmd]

$contract = new Contract($web3->provider, $abi);
$contract->at($contractAddress)->call('balanceOf', $addr, function ($err, $response) use (&$data, &$errors) {
    $errors = $err;
    $data = $response;
});

when I run this, it always get this response:

{
    "balance": {
      "value": {

      },
      "is_negative": false,
      "precision": -1,
      "bitmask": false,
      "hex": null
    }
  }

Can you help fixing it? just want to check the balance of an address with the contract.

Thanks

[jose5958]

Hi there, if you havent solved it yet, this is working fine for me.

$contract = new Contract($web3->provider, $string);
$contract->at($contractAddress)->call('balanceOf', $address, function ($err, $account) use (&$balance) {
    if ($err !== null) {
        echo 'Error: ' . $err->getMessage();
        return;
    }
        $balance=goThen($account);
});

function goThen($a) {
    $b = json_encode($a,true);
    $d=json_decode($b,true)[0]['value'];
    return $d;
}

The you have to work the format. (decimals, wei, eth, or whatever you need)

[mesutgunay]

Hi there, if you havent solved it yet, this is working fine for me.

$contract = new Contract($web3->provider, $string);
$contract->at($contractAddress)->call('balanceOf', $address, function ($err, $account) use (&$balance) {
    if ($err !== null) {
        echo 'Error: ' . $err->getMessage();
        return;
    }
      $balance=goThen($account);
});

function goThen($a) {
  $b = json_encode($a,true);
  $d=json_decode($b,true)[0]['value'];
  return $d;
}

The you have to work the format. (decimals, wei, eth, or whatever you need)

i am trying this code. but i am getting error what is $string ? i think $string is abi. i need example ERC-20 mini Abi array Pls help me. Ty $contract = new Contract($web3->provider, $string);

[mesutgunay]

i will try this;

   $miniabi  = array(array("constant"=>true,
                                                        "inputs" =>array(array("name"=>"_owner","type"=>"address")),
                                                        "name"=>"balanceOf",
                                                        "outputs" =>array(array("name"=>"balance","type"=>"uint256")),
                                                        "type"=>"function"),
                                                         array("constant"=>true,
                                                        "inputs" =>array(),
                                                        "name"=>"decimals",
                                                        "outputs" =>array(array("name"=>"","type"=>"uint8")),
                                                        "type"=>"function") );

Out put

[ { "constant":true, "inputs":[{"name":"_owner","type":"address"}], "name":"balanceOf", "outputs":[{"name":"balance","type":"uint256"}], "type":"function" },

{ "constant":true, "inputs":[], "name":"decimals", "outputs":[{"name":"","type":"uint8"}], "type":"function" } ]

[quangmd]

I suggest to get rid of this, switched to web3js. jose5958's not works either. can close now.

[mesutgunay]

I suggest to get rid of this, switched to web3js. jose5958's not works either. can close now.

There was a problem with the string "abi.json". I fixed the situation. Currently working. Thank you for your reply message.

this abi.json working ;

[ { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "owner", "type": "address" }, { "indexed": true, "internalType": "address", "name": "spender", "type": "address" }, { "indexed": false, "internalType": "uint256", "name": "value", "type": "uint256" } ], "name": "Approval", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "operator", "type": "address" }, { "indexed": true, "internalType": "address", "name": "tokenHolder", "type": "address" } ], "name": "AuthorizedOperator", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "operator", "type": "address" }, { "indexed": true, "internalType": "address", "name": "from", "type": "address" }, { "indexed": false, "internalType": "uint256", "name": "amount", "type": "uint256" }, { "indexed": false, "internalType": "bytes", "name": "data", "type": "bytes" }, { "indexed": false, "internalType": "bytes", "name": "operatorData", "type": "bytes" } ], "name": "Burned", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "operator", "type": "address" }, { "indexed": true, "internalType": "address", "name": "to", "type": "address" }, { "indexed": false, "internalType": "uint256", "name": "amount", "type": "uint256" }, { "indexed": false, "internalType": "bytes", "name": "data", "type": "bytes" }, { "indexed": false, "internalType": "bytes", "name": "operatorData", "type": "bytes" } ], "name": "Minted", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": false, "internalType": "address", "name": "account", "type": "address" } ], "name": "Paused", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "operator", "type": "address" }, { "indexed": true, "internalType": "address", "name": "tokenHolder", "type": "address" } ], "name": "RevokedOperator", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "bytes32", "name": "role", "type": "bytes32" }, { "indexed": true, "internalType": "bytes32", "name": "previousAdminRole", "type": "bytes32" }, { "indexed": true, "internalType": "bytes32", "name": "newAdminRole", "type": "bytes32" } ], "name": "RoleAdminChanged", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "bytes32", "name": "role", "type": "bytes32" }, { "indexed": true, "internalType": "address", "name": "account", "type": "address" }, { "indexed": true, "internalType": "address", "name": "sender", "type": "address" } ], "name": "RoleGranted", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "bytes32", "name": "role", "type": "bytes32" }, { "indexed": true, "internalType": "address", "name": "account", "type": "address" }, { "indexed": true, "internalType": "address", "name": "sender", "type": "address" } ], "name": "RoleRevoked", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "operator", "type": "address" }, { "indexed": true, "internalType": "address", "name": "from", "type": "address" }, { "indexed": true, "internalType": "address", "name": "to", "type": "address" }, { "indexed": false, "internalType": "uint256", "name": "amount", "type": "uint256" }, { "indexed": false, "internalType": "bytes", "name": "data", "type": "bytes" }, { "indexed": false, "internalType": "bytes", "name": "operatorData", "type": "bytes" } ], "name": "Sent", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "from", "type": "address" }, { "indexed": true, "internalType": "address", "name": "to", "type": "address" }, { "indexed": false, "internalType": "uint256", "name": "value", "type": "uint256" } ], "name": "Transfer", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": false, "internalType": "address", "name": "account", "type": "address" } ], "name": "Unpaused", "type": "event" }, { "inputs": [], "name": "DEFAULT_ADMIN_ROLE", "outputs": [ { "internalType": "bytes32", "name": "", "type": "bytes32" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "MINTER_ROLE", "outputs": [ { "internalType": "bytes32", "name": "", "type": "bytes32" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "PAUSER_ROLE", "outputs": [ { "internalType": "bytes32", "name": "", "type": "bytes32" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "holder", "type": "address" }, { "internalType": "address", "name": "spender", "type": "address" } ], "name": "allowance", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "spender", "type": "address" }, { "internalType": "uint256", "name": "value", "type": "uint256" } ], "name": "approve", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "operator", "type": "address" } ], "name": "authorizeOperator", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "tokenHolder", "type": "address" } ], "name": "balanceOf", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "uint256", "name": "amount", "type": "uint256" }, { "internalType": "bytes", "name": "data", "type": "bytes" } ], "name": "burn", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [], "name": "decimals", "outputs": [ { "internalType": "uint8", "name": "", "type": "uint8" } ], "stateMutability": "pure", "type": "function" }, { "inputs": [], "name": "defaultOperators", "outputs": [ { "internalType": "address[]", "name": "", "type": "address[]" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "bytes32", "name": "role", "type": "bytes32" } ], "name": "getRoleAdmin", "outputs": [ { "internalType": "bytes32", "name": "", "type": "bytes32" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "bytes32", "name": "role", "type": "bytes32" }, { "internalType": "address", "name": "account", "type": "address" } ], "name": "grantRole", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [], "name": "granularity", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "bytes32", "name": "role", "type": "bytes32" }, { "internalType": "address", "name": "account", "type": "address" } ], "name": "hasRole", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address[]", "name": "defaultOperators", "type": "address[]" } ], "name": "initialize", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "operator", "type": "address" }, { "internalType": "address", "name": "tokenHolder", "type": "address" } ], "name": "isOperatorFor", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "account", "type": "address" }, { "internalType": "uint256", "name": "amount", "type": "uint256" }, { "internalType": "bytes", "name": "userData", "type": "bytes" }, { "internalType": "bytes", "name": "operatorData", "type": "bytes" } ], "name": "mint", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "account", "type": "address" }, { "internalType": "uint256", "name": "amount", "type": "uint256" }, { "internalType": "bytes", "name": "userData", "type": "bytes" }, { "internalType": "bytes", "name": "operatorData", "type": "bytes" }, { "internalType": "bool", "name": "requireReceptionAck", "type": "bool" } ], "name": "mint", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [], "name": "name", "outputs": [ { "internalType": "string", "name": "", "type": "string" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "account", "type": "address" }, { "internalType": "uint256", "name": "amount", "type": "uint256" }, { "internalType": "bytes", "name": "data", "type": "bytes" }, { "internalType": "bytes", "name": "operatorData", "type": "bytes" } ], "name": "operatorBurn", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "sender", "type": "address" }, { "internalType": "address", "name": "recipient", "type": "address" }, { "internalType": "uint256", "name": "amount", "type": "uint256" }, { "internalType": "bytes", "name": "data", "type": "bytes" }, { "internalType": "bytes", "name": "operatorData", "type": "bytes" } ], "name": "operatorSend", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [], "name": "pause", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [], "name": "paused", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "bytes32", "name": "role", "type": "bytes32" }, { "internalType": "address", "name": "account", "type": "address" } ], "name": "renounceRole", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "operator", "type": "address" } ], "name": "revokeOperator", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "bytes32", "name": "role", "type": "bytes32" }, { "internalType": "address", "name": "account", "type": "address" } ], "name": "revokeRole", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "recipient", "type": "address" }, { "internalType": "uint256", "name": "amount", "type": "uint256" }, { "internalType": "bytes", "name": "data", "type": "bytes" } ], "name": "send", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "bytes4", "name": "interfaceId", "type": "bytes4" } ], "name": "supportsInterface", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "symbol", "outputs": [ { "internalType": "string", "name": "", "type": "string" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "totalSupply", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "recipient", "type": "address" }, { "internalType": "uint256", "name": "amount", "type": "uint256" } ], "name": "transfer", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "holder", "type": "address" }, { "internalType": "address", "name": "recipient", "type": "address" }, { "internalType": "uint256", "name": "amount", "type": "uint256" } ], "name": "transferFrom", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [], "name": "unpause", "outputs": [], "stateMutability": "nonpayable", "type": "function" } ]

[bsc-eth]

For your reference

use Web3\Web3; use Web3\Contract; use Web3\Utils; use Web3\Providers\HttpProvider;

       $web3 = new Web3(new HttpProvider('https://data-seed-prebsc-1-s1.binance.org:8545'));

        $abiFile = 'bep20_abi.json';
        $abiContent = file_get_contents($abiFile);
        $usdtAbi = json_decode($abiContent, true);
        $accountAddress = '0xACA53815CfF1cF2802B97fEbe4be063206222C0d';
        $contractAddress = '0xae13d989daC2f0dEbFf460aC112a837C89BAa7cd';
        $usdtContract = new Contract($web3->provider, $usdtAbi);

        $usdtContract->at($contractAddress)->call('decimals', function ($err, $decimalsArray) use (&$decimals) {
            if ($err !== null) {
                // handle error here
                return;
            }

            if (is_array($decimalsArray) && isset($decimalsArray[0])) {
              $decimals = $decimalsArray[0]->value;
            }
        });

        $usdtContract->at($contractAddress)->call('balanceOf', $accountAddress, function ($err, $result) use ($decimals) {
            if ($err !== null) {
               // handle error here
               return;
            }

            if ($result && is_array($result) && isset($result[0])) {
              $balance = $result[0]->value;  // 获取余额值
              $balanceFormatted = bcdiv($balance, bcpow('10', $decimals), $decimals);  // 已知精度，将余额转换至小数格式
              echo "Balance: " . $balanceFormatted;
              $normalizedValue = bcmul($balanceFormatted, bcpow(10, $decimals), 0);
              echo "Balance: " . $normalizedValue;
            }
        });