Questions tagged [cross-chain]

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Are cross-chain Decentralized Exchanges and cross-chain bridges are the same?

I am newbie at DeFi. I am struggling with understanding what does author of Yellow paper of LayerZero mean in this sentence: "Currently, to convert between tokens of two chains, a user must ...
himchenhim's user avatar
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Ideal cross chain swaps

What will be the ideal scenario for swapping assets in different chains? It's not possible to transfer any asset to a different chain. What if we make a separate token for the swap? Mint a token ...
Saikat Karmakar's user avatar
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How does the cross-chain protocol handle rollback cases?

When bridging assets from a source chain to a destination chain using a cross chain protocol (e.g. Circle's CCTP, li.fi's cross swap), what happens if I successfully transferFrom() and burn() (or lock(...
Harriger's user avatar
2 votes
1 answer
171 views

How are cryptocurrencies transferred between different networks?

I am new to blockchain and I have read some articles about coins, smart contract, tokens, etc. What I don't understand is that how I can send coin cross different networks. For example, I have a ...
Joey Yi Zhao's user avatar
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How can I make an erc20votes token an interchain token using axelar?

I’m trying to make a token interchain, my token is an erc20votes token I tried deploying the ERC20votes contract through the axelar interchain token portal, registered it on avalanche as the main ...
Mystic Genius's user avatar
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1 answer
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In rollups, does only layer 1<->2 cross chain transfer data is submitted to main chains, or all transactions data of rollup chain?

rollup chains batch the transactions data of its blocks/transactions, and submit it to mainnet(layer 2 e.g. ethereum ). But i doubt if rollup chain submit all data of all transactions in batch form, ...
aakash4dev's user avatar
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2 answers
487 views

Is it possible to make token cross chain after its deployment?

Hi i needed to make our ERC20 token crosschain but in process something went wrong and it is deployed on different blockchain with completely different address from other blockchains that is ...
gojic's user avatar
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Atomic swap solidity library

Is there a production-ready atomic swap library to be used in solidity? This would be needed to implement the EVM part of an atomic swap protocol
mr_bovo's user avatar
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Cross-chain transaction not reflected

Some time ago I tried to transfer some (wrapped) Ethereum from BNB Smart Chain to Ethereum mainnet using https://app.crosschainbridge.org. I would like to understand what happened since it looks like ...
user1031431's user avatar
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1 answer
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Check ownership of a token in another chain

I know how to check ownership of a token which relies on the same chain, but I need to check ownership of a token which is in another EVM chain. For exemple, NFT contract is deployed on Polygon (I can ...
Bebs V's user avatar
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2 answers
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Are Chainlink keepers a security liability?

I've previously read some of Buterin's posts and he's been especially critical of cross-chain bridges. I know they aren't bridges where digital assets are stored non-natively, but are Chainlink ...
J. Doe's user avatar
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How to prepare Hardhat project for cross-chain usages of the contracts

As the project and smart contracts with the project grow, developing and maintaining the project is hard. let's assume, all the contracts should deploy on several chains. How to structure these kinds ...
0xbeny's user avatar
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How to convert 5 ETH worth token to another blockchain wrapped ETH without actually converting tokens to ETH

So this is the example: we have 100 X Tokens on Etherium mainNet, which let's say has the value of 5ETH. Now I create Wrapped ETH on BSC and the Wrapped ETH price is same as ETH. (peg to ETH). Now I ...
Zakoo Koo's user avatar
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1 answer
69 views

Sending message/instruction from a governance system on Arbitrum to mint tokens on mainnet using Gnosis Zodiac Bridge

I am working with a DAO that has their governance/voting system on Arbitrum, and their Gnosis Safe treasury wallet on mainnet. The Gnosis Safe on mainnet contains minting keys to mint their native ...
Yuval's user avatar
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How to check if user has a token on a DIFFERENT blockchain?

I would like to check if the user, that is calling a Solidity smart contract function, has a specific token (erc20, erc721, or whichever...) on a different blockchain. Example: Let's say the user is ...
Marjetica's user avatar
1 vote
1 answer
279 views

How to prevent cross-chain signed message replay?

I'm building a system for Ethereum authentication through the browser, which also checks whether the user owns a specific token. For this, I'm sending from the back-end a nonce for the user to sign ...
Filipe Aleixo's user avatar
1 vote
1 answer
146 views

Schedule payment of ETH from polygon network to Ethereum network

I want to design a contract in polygon network which receives crypto (ETH) from sender and sends it to the receiver on a timely basis may be monthly. I am not sure if it is possible without polygon ...
NinjaMAN's user avatar
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How can we connect two different private blockchains to each other in Geth?

I have two blockchains that are working separately. I'm trying to connect them. This connection can help me to make communication between one node in blockchain 1 and another node in blockchain 2. Can ...
Matin's user avatar
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1 vote
1 answer
423 views

How to deploy a contract on Polygon/Ethereum/BSC with shared state?

I would like to deploy an ERC-20 token on multiple chains : Ethereum, Polygon and the Binance Smart Chain while keeping the same address ideally. But I have literally zero idea on how to do that, I ...
shellwhale's user avatar
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1 answer
274 views

AnyswapV5ERC20 deployment - set totalSupply

I have some questions about the anyswapV5ERC20.sol contract. First of all, are there some more detailed docs than the guide of andre cronje? My main question is: How can I set the totalSupply or mint ...
MaTok's user avatar
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1 answer
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How do cross chain transactions work?

I noticed that USDT is on ETH, TRON, Solana, Algorand etc USDC is on ETH, Solana, Algorand etc BUSD is on ETH and BSC Could somebody explain how this works to me? I understand how a Bitcoin like ...
Trevor Wood's user avatar
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76 views

Is anyone try to deploy same smart contract on different Chain network like binance smart chain, polygon matic and avalanche?

The scenario is, I want to deploy the same smart contract in binance smart chain to polygon matic and avalanche. Or I want to deploy same contract on different chain network like bsc, matic and avax. ...
Lloyd Ramos's user avatar
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1 answer
245 views

How to call a smart contract which is located in BSC from a smart contract in the Ethereum mainnet?

It this possible? How to call a smart contract from a different network? I mean, some cross-chain call. I need a decentralized solution. Chainlink maybe, or something like that?
Vladimir Kovalchuk's user avatar
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Seeking method for validating existence of a contract across EVM compatible chains?

We have a function that checks existence of a contract address as follows: function _assertContractSupportsERC721Interface(address _contract) private view { try IERC721(...
Michael Paler's user avatar
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1 answer
110 views

Is it possible to communicate between ethereum smart contract and binance smart chain contract?

I would like to call a function in the Binance smart chain contract from my ethereum mainnet smart contract is this possible?
Taaha Waseem's user avatar
1 vote
0 answers
187 views

maintaing metadata while ERC721 cross-chain transfer

I want to make any ERC721 token (on any contract) to be transferable from ethereum to MATIC chain (fully compatible with EVM with deployed support contracts on ethereum). So I am doing the following ...
hack3r-0m's user avatar
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5 votes
3 answers
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What are the available options (March 2021) for bridging tokens across the chains?

Actual problem in mind I would like to release a token for the Island DAO. I'm worried that ETH gas prices are prohibitively expensive - if I use ETH, the smaller guys will not come. But ETH is the ...
Mars Robertson's user avatar
1 vote
0 answers
2k views

How to convert my custom ERC20 token to BEP20?

I have my custom token on the Ethereum network and I want to send part of the tokens to the binance smart chain. That is, issue a wrapped token.For example: https://etherscan.io/token/...
rxxman's user avatar
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1 vote
1 answer
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Cross chain smartcontract interaction

I'm thinking about a particular use case where a smart contract in a private chain could send txs to the public chain (in my case txs would be functions calls of a smart contract in the public network)...
Luca Asga's user avatar
2 votes
0 answers
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What is the duty of a Notary in interaction between chains ? (Updated) [closed]

What is the precise definition of "Notary" entity? Is the definition of "Notary" the same in "interoperability between different blockchains" AND "cross-shard transaction in a shared chain"? Or do we ...
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1 vote
1 answer
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Griefing Attacks: Are they profitable for the attacker?

The following article explains one of the solutions for indirectly validate a block when cross-sharding transaction between two shards to prevent invalid blocks. The article called one of these ...
Questioner's user avatar
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2 votes
0 answers
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The "Fisherman" idea for indirectly determining the validity of the canonical chain?

The following article explains the problem of validating a block in a cross-shard transaction in a sharded chain, along with existing solutions. One of the mentioned solutions is the "Fisherman" idea ...
Questioner's user avatar
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2 votes
0 answers
124 views

Validating cross-shard transaction using Beacon chain snapshots?

According to this article: (Link to article), there are two types of validation for cross-shard transactions: Synchronous and Asynchronous. But the question is that why cannot we use Beacon chain ...
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2 votes
0 answers
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Ethereum cross-chain/cross DLT

What functionalities/standards does Ethereum have that can be used in cross-chain or cross-DLT operations? What is the recommended solution when someone need to do an atomic swap? And other cross ...
Suzana Maranhão Moreno's user avatar
3 votes
2 answers
535 views

cross-chain atomic swaps for integration between enterprise blockchain solutions (quorum, hyperledger, R3 corda)

Understand that cross-chain atomic swaps is for asset transfer between different cryptos. In a world where there are different enterprise blockchains, cross-chain atomic swaps as a concept/...
Nathan Aw's user avatar
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