ethereum/solidity

The Solidity Contract-Oriented Programming Language - By chatting here you agree to the https://github.com/ethereum/solidity/blob/develop/CODE_OF_CONDUCT.md

Gary

@garysdevil

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0; 
contract Test1{
    uint private a1 = 11;

    function get()  public view returns (uint){
        return a1;
    }
    function set(uint a) public{
        a1=a;
    }
   function set1() public  {
       a1=22;      
   }
    fallback() external {
        a1=33;
    }
}
contract Test2{
    function call_1(address contractAddress) public{
         (bool success,bytes memory a) =contractAddress.call(abi.encodeWithSignature("set(uint)",44));
        require(success);
    }
   function call_2(address contractAddr) public {
      (bool success,) = contractAddr.call(abi.encodeWithSignature("set1()")); require(success);
      require(success);
   }
}

function "call_1" does not work

STST

@STST00960379_twitter

你好有人说话吗？

Gary

@garysdevil

怎么了？

DIIMIIM

@DIIMIIM2_twitter

Hello! Does anyone know why nested struct getters return them empty when called via call()? (They work if called from web3js, for example)

1 reply

MY001

@MYsuanliFeng_twitter

Hey! friend.
I am a cryptocurrency investor and a confidential currency mining machine salesperson.
Our company currently sells BTC, ETH, FIL and other mining machines. At the same time, celebrate the first anniversary of Filecoin's launch on the mainnet. 🤜🤛
Currently, there are discounts for mining machines. Filecoin is the only digital certificate of IPFS, and its value will be very high in the future.
Interested friends can scan the QR code to add my contact information.

Gary

@garysdevil

I can't update storage variable by calling another contract from one contract and transfer value, who can give me a favour

I solved

Ding Tian

@ReactTop_gitlab

Hi everyone

What is main difference between ERC721 and ERC1155? which is better to mint NFT ?

KaiRo

@kairo:mozilla.org

[m]

ERC721 is a real NFT. ERC1155 can be NFT-like or fungible tokens, and mainly is there because you can have different kinds of tokens in one token contract

Parham

@parhamrm

Hey guys

I'm stuck recovering signer of a typedData(EIP712) in solidity

I've deployed a minimal version of rarible-protocol

const DOMAIN_TYPE = [
    {
        type: 'string',
        name: 'name'
    },
    {
        type: 'string',
        name: 'version'
    },
    {
        type: 'uint256',
        name: 'chainId'
    },
    {
        type: 'address',
        name: 'verifyingContract'
    }
];

const domainData = {
    name: 'Market721',
    version: '1',
    chainId: '1337',
    verifyingContract: '0x296564F6260b95f99F93fB347d456b7FC825771b'
};

const OrderTypes = {
    AssetType: [
        { name: 'assetClass', type: 'bytes4' },
        { name: 'data', type: 'bytes' }

    ],
    Asset: [
        { name: 'assetType', type: 'AssetType' },
        { name: 'value', type: 'uint256' }
    ],
    Order: [
        { name: 'maker', type: 'address' },
        { name: 'makeAsset', type: 'Asset' },
        { name: 'taker', type: 'address' },
        { name: 'takeAsset', type: 'Asset' }
    ]
};

const createTypeData = (domain, primaryType, message, types) => {
    return {
        types: { EIP712Domain: DOMAIN_TYPE, ...types },
        domain,
        primaryType,
        message
    };
};

const leftUH = {
        maker: "0xfa6954192c3087f9143f5401f7804b405ac84ca5",
        makeAsset: {
            assetType: {
                assetClass: id('ERC20'),
                data: web3.eth.abi.encodeParameter('address', '0xfa6954192c3087f9143f5401f7804b405ac84ca5')
            },
            value: BigNumber("100000000")
        },
        taker: "0x3bed4334ce380cfe41363c7e875a9fc1769578b1",
        takeAsset: {
            assetType: {
                assetClass: id('ERC721'),
                data: web3.eth.abi.encodeParameter({ root: { contract: "address", tokenId: "uint256" }}, { contract: '0xfa6954192c3087f9143f5401f7804b405ac84ca5', tokenId: 1 })
            },
            value: "1"
        }
    };

const leftMsgParams = createTypeData(domainData, 'Order', leftUH, OrderTypes)
    const leftSig = sigUtil.signTypedData_v4(Buffer.from(leftAcc, 'hex'), { data: leftMsgParams });

Parham

@parhamrm

const resault = await market.matchOrders(leftUH, leftSig, rightUH, rightSig);

and when I recover signer in solidity it doesn't match with order.maker which is signer of the order

Ding Tian

@ReactTop_gitlab

Who can explain about EIP-2981 exactly?

MY001

@MYsuanliFeng_twitter

Ghost

@ghost~61130d956da037398482e4b1

Hi, everyone. Please check the contract and I'm happy if you let me know why it has higher than normal gas fee for buy/sell.

https://bscscan.com/address/0x559100c4c697ad514340943625bceeff8605cdc3#code

benjymm

@benjymm

hi, is there any discord for solidity or this is the main group?

Danny Pr.

@dannpr

Hi I'm actually doing an online course and I'm developping on nextjs but I have this poblem on my web3.js code :Server Error
ReferenceError: window is not defined

This error happened while generating the page. Any console logs will be displayed in the terminal window.
Source
eth/web3.js (3:0) @ eval

1 | import Web3 from "web3";
2 |

3 | window.ethereum.request({ method: "eth_requestAccounts" });
4 |
5 | const web3 = new Web3(window.ethereum);
6 |

ETHERUEMconsultant2018

@ETHERUEMconsultant2018

we are so sorry to hear about your situation you can contact eth@consultant.com for any issu

Luis Schliesske

@gitpusha

Hi @cameel:matrix.org I read in the docs:

block.basefee (uint): current block’s base fee (EIP-3198 and EIP-1559)

https://docs.soliditylang.org/en/v0.8.9/cheatsheet.html?highlight=block.basefee

It's a bit ambiguous as to whether this is the base fee of the previous block or the current block that this transaction will be included in.

Is it the basefee of the block that the transaction is included in?

1 reply

Also I wondered what's the best way to get the value for the transactions priorityFee?

Is it: tx.gasprice - block.basefee ?

1 reply

S0AndS0

@s0ands0:matrix.org

[m]

@dannpr: Are ya importing web3.js within a browser or server context?

anyi

@AnYi-ray

Hi, everyone.
I don't know if I can ask such a question here. I apologize first.
I am learning about Ethereum development. I'm interested in instant messaging based on Ethereum or other blockchain platforms, but I don't know much because I'm a novice. If I want to develop an end-to-end instant messaging based on blockchain, what technologies should I learn? Or is there a project recommendation?
My English is very poor, so the above comes from the translator. If there are sentences that are not smooth, I'm so sorry!!!

3 replies

贝克街的天才

@yuyenews

First learn solidity, ethereum programs are all smart contracts. As for the instant messaging you mentioned, it should be a new way of playing smart contracts, just check it out when the time comes.

1 reply

cyphix

@cyphix:systemli.org

[m]

Ethereum Wallet with ERC20 support (GitHub). A simple interface that allows users to transfer tokens after selecting which ERC 20 token they would like to send?

Ding Tian

@ReactTop_gitlab

Hi everyone . is there any contract code to accept BUSD ?

Nuzzep

@nuzzep_twitter

Hello guys, i'm trying to understand the source code of reflect.sol
anyone has an useful documentation or guide or tutorial? thanks

cyphix

@cyphix:systemli.org

[m]

@nuzzep_twitter: Not answer questions here

bunch of questions and not one answer

Dumb canal

@dan-garay

is there a gas efficient way to reset a uint256 -> uint256 mapping?

1 reply

Giorgi

@novaknole:matrix.org

[m]

Hi all...

I am trying to get my head around ERC223

Does anyone have any idea about this ? https://ethereum.stackexchange.com/questions/112312/how-does-erc223-ensure-theres-no-need-for-approve-transferfrom

Thank you in advance

Luis Schliesske

@gitpusha

thx for the help @hrkrshnn:matrix.org

CyberProduct

@CyberProduct

Hi everyone. I'm manager and know nothing about smart contracts. Developer in my team is looking for examples of complex or not standart smart contracts for Ethereum (Solidity) or Tron. If you know some examples I will be very glad to recive link.