Welcome to zkync-developers Discussions!

[bxpana]

👋 Welcome!

We’re using Discussions as a place to connect with other members of our community. We hope that you:

• Ask questions you’re wondering about.
• Share ideas.
• Engage with other community members.
• Welcome others and are open-minded. Remember that this is a community we
  build together 💪.
• Use the Discussions as a resource to collaborate with peers and find answers from the community.

❓ Questions

The Questions Section of this Github Discussion is the perfect space for you to ask questions and seek answers from our vibrant and knowledgeable community.

Here, you'll find several categories, each dedicated to a specific topic. Whether your question pertains to SDKs, Contract Verification, Deployments, or another subject, you'll find a relevant category where you can initiate a discussion.

• Compilers
• SDKs
• Contract Verification
• Deployments
• General

[0xRektor]

An interesting experiment. I'll be watching

[nahomtz]

nice

[Draugin]

first time to use github. Thank to zksync. WAGMI

[P62PPP]

hallo everybody. Can somebody help? I can not connect to the discord of zksync, i try from few browsers, i am trying from zksync.io invitation
thanks in advance

[MrRedl]

nice nice!

[enerelt0418]

glad to join here mates

[lellycrypto-code]

https://github.com/matter-labs/zksync/blob/v0.7.1/contracts/interfaces/IZkSync.sol

What's the solution to this problem

[bxpana]

You'll want to reach out to Guild since it's their platform.

[jaguard2021]

@VOVANCAO

[Irbidonles]

hay.... any link DC ZkSycn i want to join .......
link on guild and official web of zksync has expied......
please help me......

[Draugin]

I couldnt get level 1 on guild. I hope its temporary

[doypro]

Guys I have a problem here, regarding Discord Server. I joined on Discord Server since Feb 2023, unfortunately, today I can't find the Server on my Discord, I have a tendency of opening zkSync server almost every single day, even if I go to read for others conservations, so dont believe that I did any mistake to be kicked out. My problem is, I can't join the Server any more, every link I try it expired!! What can I do to access the Server again??
Help me please.

Discord name:
Doypro.Official

[damien75]

Discussions on Github with message version tracking (meant to be), that's a good idea. Interested to see how this goes 👀

[Clemize]

Same sir

[Chizimminista]

hmmm ure just joining now

[verma-shu6ham]

Hello, I have some questions that I would appreciate if someone could help clarify:

1. Suppose I have an ERC20 smart contract currently on the Ethereum network, and I wish to migrate it to zkSync. Would this necessitate the use of a bridge? If so, does this imply that any token can be bridged? Specifically, if I deploy the ERC20 to the Goerli network for testing purposes, am I able to bridge it to zkSync myself, or is this something only the zkSync team can do?

2. Is the migration limited to ERC20 tokens, or can other types of smart contracts also be migrated? If the latter, what is the appropriate procedure? Additionally, during the migration, is it possible to move the storage of the existing Goerli contract to zkSync?

[Bensmithz07]

Nice performance

[yog2012]

Nice

[CryptoEmko]

Very nice

[13billyblack]

looks good!

[bob456456]

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

contract CustomContract {
mapping(address => bool) private authorizedPersons;
address private owner;

event PersonAdded(address indexed person);
event PersonRemoved(address indexed person);

constructor() {
    owner = msg.sender;
}

modifier onlyOwner() {
    require(msg.sender == owner, "Only owner.");
    _;
}

modifier onlyAuthorizedPerson() {
    require(authorizedPersons[msg.sender], "Only authorized persons have access.");
    _;
}

function getPersonIsAuthorized(address _address) external view returns (bool) {
    return authorizedPersons[_address];
}

function addPerson(address _address) external onlyOwner returns (bool) {
    require(!authorizedPersons[_address], "Already authorized.");
    authorizedPersons[_address] = true;
    emit PersonAdded(_address);
    return true;
}

function removePerson(address _address) external onlyOwner returns (bool) {
    require(authorizedPersons[_address], "Not authorized.");
    authorizedPersons[_address] = false;
    emit PersonRemoved(_address);
    return true;
}

}

[starkqwa]

Interesting thanks for you responding

[vishnu5104]

Hi,

I'm conducting some research on the best NFT Fetching/mapping API to obtain on-chain data. I'd appreciate your insights and recommendations. Could you please share your experiences and suggestions regarding which API works most effectively for this purpose?

[SooparApe]

Yes, I would like to know this too!

I usually use Alchemy or Moralis but niether support NFT mapping on ZKSync

[richiebinance]

Long life zksync 💕

[foodara90]

boom to zksync

[artem199004]

HELLO. I can’t join the discord nickname Maladoy#0639. Tell me how to solve this problem. Thank you

[bxpana]

Please email us at [email protected] and we can help you there.

[Adrenalin1989]

Привіт. Чи вдалось вирішити проблему? Теж саме, не можу приєднатися до дискорду. Дякую

[edmundedgar]

Hi, a while back I ran into this issue where if you use transfer() on zksync it fails because it hard-codes a gas assumption and that assumption doesn't hold on zksync. Then IIRC somebody at zksync invented a clever solution that would allow it to still work on zksync. Did that solution ever get deployed? If not do we know approximately when it might be?

(I don't have funds stuck or anything and it's easy to work around it, I'd just rather deploy the code with transfer() because it's audited and deployed that way on other chains.)

[bxpana]

Check out #229 (comment) for the most recent update

[yog2012]

I am very glad to find the development community,I join

[0xnth]

🫡🫡

[jaguard2021]

Where can I find information on how to verify a contract in ZKSync or useful guidelines for the verification process? Thank you for the assistance from all community members

[bxpana]

The best spot will be in our docs https://era.zksync.io/docs/dev/how-to/verify-contracts.html#verify-contracts-with-hardhat

[bxpana]

If you have any questions or issues please feel free to open up a discussion post 😁

[jaguard2021]

Thanks Sir

[yog2012]

hey,how can I submit the code?

[arnolwijaya77]

why total transactions in etherscan version shown less compared to the previous one?

[akamanfc]

cool news

[yas3i3]

nice job

[Chizimminista]

are you a dev?

[kaiw0866]

I have a problem. I have submitted two transactions to the ETH main network respectively, and the first transaction cost is relatively low, resulting in withdrawal failure. Can I combine the two transactions? That way you don't have to pay as much GAS

[bxpana]

If you have an issue you can either open up a discussion or email us at [email protected]

[l3erryy99]

So nice roll-up mate!

[victorma17]

Hey there! We are a small startup trying to use a paymaster and We would like to know if is possible sponsorize a transaction using a paymaster from an Account that we don't have the Private Key, I mean, We don't if it is possible authorise one transaction through third party apps like Wallet Connect. Thanks in advance!

[sabarteros]

wow amazing.

[gerote]

can't wait for boom zk.

[dematre]

i joined

[cowokjantan]

Will the zksync era be able to use gas other than ETH like zksync lite???

[amir7970]

Hello sir. I have accidentally sent my zktokens to zksync contract address.
here is the transaction hash: 0x53752d5d23b26a35b4e85ea85b47a595a5508eebde150ef5b0806cb6fa846649
Could some one help me to get the tokens back?

[malingzhao]

2024-09-04T06:31:15.463957Z INFO NamedFuture{name=node_storage_initializer}: zksync_node_framework::implementations::layers::node_storage_init: Node storage initialization task completed
Error: One or more tasks failed: [TaskFailed(TaskId("oneshot_runner"), Oneshot task node_storage_initializer_precondition failed

Caused by:
0: Failed acquiring DB connection [requested by en at core/node/node_storage_init/src/external_node/snapshot_recovery.rs:75]: pool timed out while waiting for an open connection

how to  reslove it  deploy node

[sarthak608]

Can someone here explain and share any resources or content that would help me understand ZKSync Prover such a boojum, belman, and other cryptography pairing library ? I am currently working on gaining a deeper understanding of ZK Provers and have come across ZKSync Prover. Any guidance or helpful materials would be greatly appreciated!

[dutterbutter]

Hey @sarthak608 👋 Check out the documentation below 👇

https://matter-labs.github.io/zksync-era/prover/latest/

[sarthak608]

Hey @dutterbutter Thank you so much for providing a document having a deeper drive on ZKSync Prover.

[sarthak608]

Hey @dutterbutter
Pls correct me if I am wrong, Need to confirm below high level understanding on ZKsync

In zkSync, a Merkle tree manages the state of the network by organizing data into a structure of cryptographic hashes, making it efficient for verifications and representing the state of zkSync as a single hash. Zero-Knowledge Proofs are used to ensure the correct computation of state transitions from one Merkle root to the next (one state to another), providing secure and scalable off-chain processing.

Does this correct, merkle and ZKP use case in Zksync for network state management and verifying off-chain state change