Small guide to get started?

[dformdotdk]

Hi

I'm really thankful for you, providing this package. I have installed Geth on a separate server.

I have created a folder where I've uploaded all erc20-php files together with the ethereal-rpc and http-client files. Then created an index.php file where I added this code:

<?php
require('EthereumRPC.php');

$geth = new EthereumRPC('195.xxx.xxx.xxx', 8545);
$erc20 = new \ERC20\ERC20($geth);
$token = $erc20->token('0xd26114cd6EE289AccF82350c8d8487fedB8A0C07');

var_dump($token->name());
var_dump($token->symbol());
var_dump($token->decimals());
?>

However, I'm getting an error: PHP Fatal error: Uncaught Error: Class 'EthereumRPC'

Could you perhaps write a small guide to get started? That would be awesome.

Kind regards

[dformdotdk]

If I try to install using composer I get this error:

composer require furqansiddiqui/erc20-php
Using version ^0.1.1 for furqansiddiqui/erc20-php
./composer.json has been created
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Installation request for furqansiddiqui/erc20-php ^0.1.1 -> satisfiable by furqansiddiqui/erc20-php[0.1.1].
    - furqansiddiqui/erc20-php 0.1.1 requires furqansiddiqui/ethereum-rpc dev-master -> satisfiable by furqansiddiqui/ethereum-rpc[dev-master] but these conflict with your requirements or minimum-stability.

Installation failed, deleting ./composer.json.

[anthonypaslange]

@dyvel try creating a composer.json file manually and putting the following content in it: { "minimum-stability": "dev", "require": { "furqansiddiqui/erc20-php": "dev-master", "kesar/ethereum-php": "dev-master" } } After this, navigate to your directory in the terminal and enter composer install For me it works this way.

[dformdotdk]

Thanks that helped :-)

Installing using composer created a vendor folder with 7 subfolder, furqansiddiqui being one of them, and an autoload.php file. I included the autoload file, and it now connects to geth.

But I'm getting this error:

PHP Fatal error: Uncaught EthereumRPC\\Exception\\ConnectionException: Expected "application/json", got "text/plain; charset=utf-8" in /home/DOMAIN/public_html/eth/vendor/furqansiddiqui/ethereum-rpc/src/EthereumRPC.php:141

Do you have an idea as to why I'm getting this error?

I'm starting geth with this command: geth --rpc --rpcaddr "0.0.0.0" --rpccorsdomain "*" --light

[anthonypaslange]

I understand this error. But not sure why you got it. You should try to send a request to geth using curl and checking the response. Maybe the connection isn't working. I'm starting Geth this way: geth --syncmode "light" --rpc --rpcaddr IPADDRESS --rpcapi="db,eth,net,web3,personal,web3"

Here is an example curl request: curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getBalance","params":["0x3f5ce5fbfe3e9af3971dd833d26ba9b5c936f0be", "latest"],"id":3}' http://IPADDRESS:8545

[dformdotdk]

Seems the script doesn't like a hostname - changed it to an ip. Closer to get it working now :-)

Running the php script now throws this error:

`PHP Fatal error: Uncaught ERC20\Exception\ERC20Exception: Failed to retrieve ERC20 token decimals/scale value in /home/DOMAIN/public_html/eth/vendor/furqansiddiqui/erc20-php/src/ERC20_Token.php:101 Stack trace:

0 /home/DOMAIN/public_html/eth/test.php(18): ERC20\ERC20_Token->decimals()

1 {main}

thrown in /home/DOMAIN/public_html/eth/vendor/furqansiddiqui/erc20-php/src/ERC20_Token.php on line 101`

BTW, thanks for all your help @mrpetfreak

[anthonypaslange]

@dyvel happy to help you. Because of the error: Did you test your Geth manually via curl? What response do you get? I know, for example, if you started geth again you need to wait some minutes to have enough peers again.

[furqansiddiqui]

@dyvel please give contract address so I can reproduce this issue

[dformdotdk]

@furqansiddiqui I'm using the code below. The address is the one from your example - just trying to get it working, before I modify anything....

<?php
require('vendor/autoload.php');

use EthereumRPC\EthereumRPC;
use ERC20\ERC20;

$geth = new EthereumRPC('195.xxx.xxx.xxx', 8545);
$erc20 = new \ERC20\ERC20($geth);

$token = $erc20->token('0xd26114cd6EE289AccF82350c8d8487fedB8A0C07');

var_dump($token->name());
var_dump($token->symbol());
var_dump($token->decimals());
?>

[dformdotdk]

I just tried again - got a response now, but still see errors in my log file.

Tried a manuel call to Geth Call: curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getBalance","params":["0xd26114cd6EE289AccF82350c8d8487fedB8A0C07", "latest"],"id":3}' http://IPADDRESS:8545

Response: {"jsonrpc":"2.0","id":3,"result":"0x0"}

Using the code I posted in my comment above, the output was: string(8) "OMGToken" string(3) "OMG"

In my server log I see:

PHP Fatal error:  Uncaught Error: Call to undefined function EthereumRPC\\bcadd() in /home/DOMAIN/public_html/eth/vendor/furqansiddiqui/ethereum-rpc/src/BcMath.php:32
Stack trace:
#0 /home/DOMAIN/public_html/eth/vendor/furqansiddiqui/ethereum-rpc/src/Contracts/ABI/DataTypes.php(119): EthereumRPC\\BcMath::HexDec('12')
#1 /home/DOMAIN/public_html/eth/vendor/furqansiddiqui/ethereum-rpc/src/Contracts/ABI.php(182): EthereumRPC\\Contracts\\ABI\\DataTypes::Decode('uint', '12')
#2 /home/DOMAIN/public_html/eth/vendor/furqansiddiqui/ethereum-rpc/src/Contracts/Contract.php(95): EthereumRPC\\Contracts\\ABI->decodeResponse('decimals', '000000000000000...')
#3 /home/DOMAIN/public_html/eth/vendor/furqansiddiqui/erc20-php/src/ERC20_Token.php(98): EthereumRPC\\Contracts\\Contract->call('decimals')
#4 /home/DOMAIN/public_html/eth/test.php(18): ERC20\\ERC20_Token->decimals()
#5 {main}
thrown in /home/DOMAIN/public_html/eth/vendor/furqansiddiqui/ethereum-rpc/src/BcMath.php on line 32

[furqansiddiqui]

You need to have bcmath extension installed and enabled.

On ubuntu / debian based systems you may run:

sudo apt-get install php-bcmath

On Wed, Jun 13, 2018, 5:38 PM dyvel notifications@github.com wrote:

I just tried again - got a response now, but still see errors in my log file.

Tried a manuel call to Geth Call: curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getBalance","params":["0xd26114cd6EE289AccF82350c8d8487fedB8A0C07", "latest"],"id":3}' http://IPADDRESS:8545 Response: {"jsonrpc":"2.0","id":3,"result":"0x0"}

Using the code I posted above, the output was: string(8) "OMGToken" string(3) "OMG"

In my server log I see:

PHP Fatal error: Uncaught Error: Call to undefined function EthereumRPC\bcadd() in /home/DOMAIN/public_html/eth/vendor/furqansiddiqui/ethereum-rpc/src/BcMath.php:32 Stack trace:

0 /home/DOMAIN/public_html/eth/vendor/furqansiddiqui/ethereum-rpc/src/Contracts/ABI/DataTypes.php(119): EthereumRPC\BcMath::HexDec('12')

1 /home/DOMAIN/public_html/eth/vendor/furqansiddiqui/ethereum-rpc/src/Contracts/ABI.php(182): EthereumRPC\Contracts\ABI\DataTypes::Decode('uint', '12')

2 /home/DOMAIN/public_html/eth/vendor/furqansiddiqui/ethereum-rpc/src/Contracts/Contract.php(95): EthereumRPC\Contracts\ABI->decodeResponse('decimals', '000000000000000...')

3 /home/DOMAIN/public_html/eth/vendor/furqansiddiqui/erc20-php/src/ERC20_Token.php(98): EthereumRPC\Contracts\Contract->call('decimals')

4 /home/DOMAIN/public_html/eth/test.php(18): ERC20\ERC20_Token->decimals()

5 {main}

thrown in /home/DOMAIN/public_html/eth/vendor/furqansiddiqui/ethereum-rpc/src/BcMath.php on line 32

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/furqansiddiqui/erc20-php/issues/3#issuecomment-396922377, or mute the thread https://github.com/notifications/unsubscribe-auth/AK9ABU6J94jVRD35B-c5fRkiHZrN4r1Iks5t8Qe-gaJpZM4Uk_2g .

[dformdotdk]

@furqansiddiqui Bingo! - that did the trick - thank you so much! :-) 👍

[furqansiddiqui]

Glad to help!

[karthikshaml]

Hi @furqansiddiqui,

Thanks for your ERC20 Library. am using your library and getting the below error.

ERC20\Exception\ERC20Exception: Failed to retrieve ERC20 token decimals/scale value in file /var/www/html/tokendash/vendor/furqansiddiqui/erc20-php/src/ERC20_Token.php on line 101

Looking forward your suggestions/help to fix the issues.

Thanks

[r00ts3ctors]

<?php require('vendor/autoload.php');

use EthereumRPC\EthereumRPC; use ERC20\ERC20;

$geth = new EthereumRPC('192.168.100.5', 8545); $erc20 = new \ERC20\ERC20($geth);

$token = $erc20->token('0xd26114cd6EE289AccF82350c8d8487fedB8A0C07');

var_dump($token->name()); var_dump($token->symbol()); var_dump($token->decimals()); ?>

erespond@notebook:/opt/lampp/htdocs/coba3$ php coba3.php string(0) "" string(0) "" int(0)

Why i get that and on geth : INFO [10-23|03:28:23.847] New local node record seq=2 id=1938ba47425ce4be ip=127.0.0.1 udp=30303 tcp=30303 INFO [10-23|03:28:23.847] Started P2P networking self=enode://7b60a4d4bc471e31ba38a52ea01a053c7791a399f40fbaaf759890ee92772e1994ab8d65f2eb8a84137f906d4959f93a7347be8898193d6404159f5d525c2117@127.0.0.1:30303 INFO [10-23|03:28:23.847] IPC endpoint opened url=/home/erespond/.ethereum/geth.ipc INFO [10-23|03:28:23.848] HTTP endpoint opened url=http://192.168.100.5:8545 cors= vhosts=localhost