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What makes an NFT be considered a wrapped NFT?

When you bridge an NFT let's say through Wormhole NFT bridge then on the destination chain it creates a wrapped NFT. This is done by deploying a separate ERC-721 contract for every unique combination ...
SMdG's user avatar
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Solana-Ethereum bridges

Ethereum uses the secp256k1 public key cryptography and Solana uses the ed25519 public key cryptography. How is that situation handled in the case of bridges? Let's say that we want to certify a block ...
Mathieu Dutour Sikiric's user avatar
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2 answers
27 views

where does popular bridges keeps their private key in backend in dapps?

I have an interesting question, that major players of bridges and other dapps, where do they store their private keys at their backend? I mean what flow do they decide so that only owner of that ...
Manav Notnani's user avatar
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2 answers
23 views

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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1 answer
19 views

About bridging tokens

Prominent tokens such as shibainu and worldcoin exist in polygon and Op as well as ethereum. Is this a bridge from L1 to L2 by token operators so that tokens can be traded in a more scalable ...
tjtr's user avatar
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How can I buy mETH in my mantle-network Metamask wallet? I bridged some ETH today but only ended up with wETH in my metamask

I'm new to this. I ended up with wETH in my metamask. I'm trying to get mETH instead. How do I swap wETH for mETH?
user132864's user avatar
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11 views

How to write a custom bridge (for testnets)

I have two private testnets running on a network - one is Ethereum using PoW consensus and the other is running Ethereum with PoS consensus i want to create a bridge between them - say i want to move ...
Muhammad Yasir's user avatar
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1 answer
77 views

Bridge of tokens to L2?

I am developing erc20 tokens and Dapps. If we can issue tokens to ethereum and when they are moved (e.g. when we move tokens according to Dapps rules) we can use polygonZkEVM or optimism with high ...
tjtr's user avatar
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Bridging ERC-20 Tokens to SPL Tokens with Tax Features Using Wormhole or Similar Platforms

I'm exploring the possibility of bridging ERC-20 tokens to a similar contract on the Solana blockchain using Wormhole or a comparable platform. My primary concern is the retention of specific token ...
RookLifting's user avatar
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20 views

Bridging ethers without private keys

According to Optimism SDK guide we should provide the Ethereum private key to generate an account on Optimism. If we were to apply this method to an crypto exchange that its wallet service is ...
Alireza's user avatar
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1 answer
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100% beginner : i need to burn tokens from BSC and check that they have been burnt, with a script (js) => how to?

You need to know : i have never touched solididty / eth ! I work for a company that has a token on the BSC. We would like to bridge this token to Solana by burning the token on the BSC and airdroping ...
Effe2's user avatar
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SafeERC20: low-level call failed safeTransferFrom

I`m developing a token bridge based on the omnibridge contracts here https://github.com/omni/omnibridge https://github.com/omni/tokenbridge When calling relayTokens from my dapp Im getting JSON RPC ...
koukotsu's user avatar
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0 answers
7 views

Suitable bridge projects for new EVM chain

I am working on developing a bridge between my custom EVM chain and other chains such as Ethereum and BSC. Is anyone aware of any suitable existing projects on git hub that I can base my project on? I ...
koukotsu's user avatar
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0 answers
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What is the correct syntax for a tuple argument?

I am trying to interact with a bridge but I am stuck at correctly inputting the argument. The bridge in question is the ETH-RSK (ROOTSTOCK) Tokenbridge. They way the bridge works is, you call the ...
amateur9494's user avatar
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1 answer
66 views

Are ethereum and polygon ENS synced?

I want to buy myself an ENS domain, but i don't want to pay the gas fees on eth. I know that ENS is integrated on both blockchains but I can't find info if they are synced in any way. If I buy the ...
Josif Hamed's user avatar
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1 answer
297 views

Is it possible to transfer USDC from Fantom Opera network to BEP-20 network?

I have tried couple of bridging websites like Anyswap, Spookyswap but it failed badly. My coins are stuck in Fantom network. I want to switch them to other network, any suggestion?
TNX LABS's user avatar
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25 views

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
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Any publication recommendation for Bridge security?

I am looking for any publications dealing with bridge security or vulnerability. Any recommendations are welcomed :) I have a few, but I am gathering more recommendations
Wonjae Choi's user avatar
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1 answer
92 views

I met difficulties: web3. Exceptions. Web3ValidationError:

When I use web3.py to write a piece of code to bridge ETH from zks to op chain, I keep getting a 'deposit' method error. I have used the API from the Across project and written the code in the web3....
黑大帅's user avatar
1 vote
1 answer
824 views

ETH pending transaction (>4 days)

I have a transaction pending on ETH which is bridging ETH to Linea Mainnet. I accidentally set my "advanced" to both Base and Priority to 10. Which now causing my transaction stuck more than ...
Brian Har's user avatar
1 vote
1 answer
109 views

Chainlink Oracle to call API

I have quite some question regarding Chainlink call API. I made an API and trying to call it from my Chainlink through smart contract. As I linked my API to bridge in Chainlink Operator UI, I try to ...
xopherwwl's user avatar
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46 views

Can I bridge if don't have any ETH?

I have a metamask wallet. I have 25.8 USDC that I want to bridge from optimism to polygon or ethereum mainet but I dont have any ETH, nor on the polygon, optimism or mainet wallet. Is this possible or ...
Juan Diego Rosas's user avatar
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0 answers
18 views

As of 2023 June, what is the best method to swap USDC from Arbitrum to Polygon with the least slippage

It's June 2023, what is the most cost effective way to swap USDC from Arbitrum to Polygon?
Patoshi パトシ's user avatar
1 vote
0 answers
120 views

How to transfer coins between L1 and L2 via web3.js or ethers.js?

How to do it? Programmatically. Does it always require a bridge? Or can it be done in other way too? I haven't found any difinitive answer to this anywhere.
Nondi's user avatar
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1 vote
1 answer
196 views

How does one create and send TXs on L2 - Arbitrum and others?

In ethers.js or web3.js How does one create and send TXs on L2 - Arbitrum and others? Is the algorithm absolutely identical to the one on L1, or not? How does one transfer ETH between L1 and L2?
Kyell's user avatar
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2 answers
226 views

how to estimate the gas price while performing bridge using Axelar network?

I am using the Axelar network to transfer tokens from chain A to chain B I am using the function callContractWithToken in the Axelar network I need to figure out the gas fee which I should send to the ...
Badrik Patel's user avatar
2 votes
1 answer
169 views

Have any a16z-backed protocols ever been hacked?

This year, we saw the hack by exploit of a Binance bridge and a Ronin bridge due to weak code written by the protocol creators. a16z Crypto is the most influential DeFi protocol investor in web3, ...
user610620's user avatar
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1 answer
204 views

How to write a bridge [duplicate]

I'm thinking about writing an bridge between 2 blockchain, one of them is EVM and the another one is not. How i can do that?? i think i need a lot of liquidity in 2 side of bridge and when user ...
Alireza's user avatar
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0 votes
2 answers
425 views

How do layer-2 bridges and protocols earn revenue?

Everytime I've used a bridge like Polygon and Aztec, all they charge are gas fee transactions to make the transfers and lock-up conversions between layer 1 and layer 2. Bridges therefore are nothing ...
user610620's user avatar
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-1 votes
1 answer
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Is the code for the Polygon bridge open-source somewhere?

Does Github store the Solidity code for the Polygon bridge? I can't find the official bridge code anywhere.
user610620's user avatar
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3 answers
137 views

Why would an upgradeable smart contract or bridge not be preferred?

A hackathon shows preference towards a bridge smart contract that is not upgradeable. Why would developers view this as an advantage when building a protocol or dapp? Wouldn't it sound better to say ...
user610620's user avatar
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1 vote
0 answers
69 views

EVM Bridge Claim Error: 32000

I am working on EVM bridge from between a foreign and local chain. Depositing tokens to the bridge contract works so fine, but claiming the token on the native chain returns error: Gas estimation ...
PerfDev.'s user avatar
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1 answer
467 views

"execution reverted: ERC20: call failed"

I try to call the swap function in X bridge but it is not working mysteriously. so contract X (which is the bridge) is calling a handler inside internally and the transfer method is happening there. I ...
Helia Marami's user avatar
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1 answer
182 views

is solana benifiting with solana virtual machine

What is the meaning for a blockchain of not having evm or vm compatibility? What benefits solana will get of now having svm?
maztt's user avatar
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1 answer
41 views

Are fully decentralized, trustless bridges possible between two separate blockchains?

I have done some research but I couldn't find a conclusive answer for this. I want to build a bridge between two Ethereum test nets as a proof of concept and initially thought it would be possible to ...
dhsdshdhk's user avatar
1 vote
0 answers
51 views

Can I make a bridge without liquidity?

I started developing what it meant to be a bridge to learn and settle down my Solidity knowledge. I thought it could be done by one person and from what I understood I just needed smart contracts to ...
Javier Guzmán's user avatar
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0 answers
38 views

Can you make one transaction on mainnet that initiates a transaction on a layer 2?

I was going through some grants/RFPs and I noticed an interesting request. They are looking for a solution that allows a user to make a single transaction on mainnet to deposit funds into a protocol ...
soyboy's user avatar
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0 votes
1 answer
200 views

How to get balance from a chain different than the one currently connected?

I am building a small bridge in order to learn about web3 and I would like to show the balance from the destination chain/network. For example, if I want to pass Ethereum from Ethereum mainnet to ...
Javier Guzmán's user avatar
1 vote
0 answers
44 views

Will dynamic metadata persist for bridged assets transfered between Ethereum and Polygon?

Im exploring how I can use polygon for my existing eth nft 721 contracts. From what I can gather once Eth contract is mapped to polygon you can then bridge your assets over. This seems simple. I know ...
Potion's user avatar
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4 votes
1 answer
264 views

Polygon mainnet has two official ERC20 Link token contract. Which one DEXs use when on polygon mainnet

I was going through the top erc20 token by marketcap on polygonscan. There I have found these two LINK tokens: https://polygonscan.com/token/0x53e0bca35ec356bd5dddfebbd1fc0fd03fabad39 ~ from polygon ...
Rishabh Raghwendra's user avatar
2 votes
1 answer
181 views

What does it mean to "send a contract calldata"?

While reading this blog about Connext.Network, I encountered with the following sentence: Connext is an interoperability protocol that allows users to send fast, fully non-custodial transfers or ...
Stav Alfi's user avatar
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1 vote
0 answers
103 views

How can i retrieve the list of ERC20 tokens bridged to other evm chains?

Is there is a way (preferably not relying on an external API) to retrieve a list of tokens bridged to L2 or other EVM chains corresponding to a token on the Ethereum mainnet. I thought of parsing ...
David Van Isacker's user avatar
1 vote
1 answer
184 views

how long takes to pass erc20 token to another chain in stargate

How long takes to pass erc20 token to another chain in stargate on mainnet. example: 1 usdt from bsc to fantom(how long takes to start transaction on destination chain?)
0xbeny's user avatar
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1 vote
1 answer
296 views

How exactly does minting of token in bridges work?

I know what bridges are and the problem they solve. The only problem now is I am trying to wrap my head around how they actually do what they do. I found an answer similar to this question here, where ...
Finlay Weber's user avatar
1 vote
1 answer
236 views

Native token Bridge to swap another native token

I have a smart contract on the BSC network that I want to accept other tokens like AVAX, MATIC, ETH, and other EVM compatible tokens. How would one go about letting a user use AVAX but at the end it ...
Scott Deutsch's user avatar
0 votes
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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1 vote
0 answers
317 views

How long it takes for a smart contract to be mapped by Polygon Token Mapper?

So, I've created my smart contracts (ERC-1155 with transparent upgradable proxy) both for ethereum and polygon, deployed and verified. Then I use the mapper tool of Polygon for mapping(?). I've been ...
MehmedB's user avatar
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1 answer
2k views

How can a token have the same contract address on ERC20 and BEP20

I'm getting into a bit of web3 dev, and I'm having trouble getting a handle on how contracts can be interchangeable between networks. Some tokens create a 'wrapped' version, that is tethered in price ...
silencedogood's user avatar
1 vote
0 answers
78 views

Multichain token: Claim erc20 on L2 requiring balance of erc721 on Mainnet

So, I'm working on an NFT project on mainnet and we want it to have its own currency on L2 so its actually a frictionless currency. We are looking into Arbitrum and Polygon. I've noticed that first ...
Lucas Vinzon's user avatar
2 votes
1 answer
86 views

How can I determine if a bridge site is legit?

I have seen online tutorials recommend Hop and Polygon bridges for transferring ETH from Polygon network to mainnet. Recently I came across the relatively new Umbria Narni bridge which claims much ...
qwr's user avatar
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