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Questions tagged [sidechains]

64 questions
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How thoroughly has Segregated Witness been tested?

I've encountered claims that Segregated Witness was "not really tested" and is being "rushed". It is my understanding that SegWit had been running on Elements for more than half a year already, and that it is currently being run on its own…
Murch
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1 answer

What are the segregated witness tradeoffs?

Segregated witnesses sound like a win in a lot of ways, I'm just trying to understand how they apply to scalability. If I understand correctly, there is a second Merkle tree of witnesses mirroring the transaction data. The witness tree's root is…
Steve Ellis
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2 answers

How is a side-chain merging back to Bitcoin chain protected against double-spend? Where are the side-chain mining fees?

I am struggling to understand the concept of "side-chains" that's discussed a lot lately, but never trully explained. How I understand "side-chain": it's an altcoin, with a separate blockchain, with a separate PoW rules and mineres and mining…
Karel Bílek
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How would SPV proofs be verified when moving assets back in 2-way pegged sidechains?

I've seen similar questions posted all around, but haven't found an answer I can comprehend. Ok, so the process of 2 way pegging is: I move some coins to OP_SPVPROOFVERIFY on the parent blockchain. I wait for some time (e.g. 1 day) I get coins on…
ripper234
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Would sidechains help Bitcoin scale?

Are sidechains intended to help Bitcoin scale? Do they reduce load on Bitcoin's main chain? If not, why not?
Nick ODell
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4 answers

What is "fed-peg" and "predefined functionaries" with sidechains?

I am reading about side-chains, and what I read in this article is: The initial sidechain included in Sidechain Elements works on a federated security model; while it’s still peer-to-peer and consensus-based, security for the blockchain is…
Karel Bílek
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7
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2 answers

Are sidechains really new?

People have been talking a lot about side chains, but I thought this has been around for a while under a different name. Coins like Namecoin, Devcoin, ixcoin, i0coin, groupcoin, etc are all merge mined and have existed long before I ever heard the…
Mark
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Can someone ELI5 to me for Bitcoin Atomic Swaps?

I'm reading up the wiki page here: https://en.bitcoin.it/wiki/Atomic_cross-chain_trading I understand a user can create a transaction without signing it and not broadcasting it to the network. I know this is the main concept to get atomic swaps to…
Patoshi パトシ
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What are 'pegged' side chains are and how they will be useful for Bitcoin?

What seems to be a very important paper was released this past week (http://www.blockstream.com/sidechains.pdf). It centers around the idea of 'pegged' side chains, and being able to move coins from one blockchain to another. Can someone summarize…
morsecoder
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What is spacechain?

I am interested in experimenting with layer 2 solutions like Lightning, Liquid, Rootstock etc. Is "spacechain" a new concept and how does it improve Bitcoin ecosystem? What are space chains? How is it different from sidechain? What are its use…
user103136
5
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3 answers

Are there any "slow" sidechains? What are the tradeoffs?

Are there any examples of sidechains which target a block time much longer than bitcoin? Could a sidechain be made "slow enough" such that the size of a proof (SPV proof?) for it could actually fit into and be verified by a mainchain bitcoin…
philbw4
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What are sidechains and drivechains?

Altcoins have existed for many years and there are many hundreds of different ones already. A more recent concept is sidechains and drivechains. What are sidechains and drivechains? How do they differ from regular altcoins?
Dr.Haribo
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Proof of Identity Sidechain Proposals

I have seen various Proof of Identity Proposal that all required some degree of trust (to verify the person in physical possession of a Passport is also the owner of it for example). Have their been any proposals that are completely trustless? Is…
dontmindme
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Sidechain vs layer 2

I want to know what's the difference between "sidechain" and "layer 2". Is it the same thing ? Thanks
Bob5421
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Is the contest period really necessary for cross-chain transactions in 2-way-peg sidechains?

According to the first sidechain article (Link), the cross chain transaction process can be briefly describe as follows: Alice has a wallet on sidechain S1. She wants to send some coins to sidechain S2. So she makes a transaction containing some…
Cong
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