Questions tagged [cross-chain]

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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 ...
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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 ...
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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 ...
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How to redeem wormhole's Token Bridge tokens in a destination chain?

I'm trying to integrate wormhole's Token Bridge in my smart-contract. I have a transferTokens function to transfer wrapped UST from Ethereum to get native UST on Terra, but how can I redeem that UST ...
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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 ...
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What is the best and cheapest open source cross chain bridge API?

What is the best and cheapest (for swap process) open source cross chain bridge API with a good documentation? I couldn't find binance bridge's API documention with more explanation than here. And, ...
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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 ...
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1 vote
1 answer
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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 ...
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1 answer
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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 ...
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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 ...
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1 answer
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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 ...
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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 ...
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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 ...
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Is there a deflationary token deploy same contract from different blockchain network/platform?

is there a deflationary token deploy same contract from different blockchain network/platform? Like you want a deflationary token like safemoon that deployed the same contract on binance smart chain, ...
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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. ...
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1 answer
150 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?
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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(...
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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?
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1 vote
0 answers
157 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 ...
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5 votes
3 answers
214 views

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 ...
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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/...
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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)...
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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 answer
777 views

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 ...
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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 ...
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2 votes
0 answers
107 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
67 views

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 ...
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3 votes
2 answers
497 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/...
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