Questions tagged [spv]

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How to validate a BTC transaction in an Ethereum smart contract?

Can an Ethereum smart contract use SPV to validate a BTC or BCH transaction? If so, are there any functioning libraries? What are the drawbacks or challenges when doing so?
2 votes
0 answers

How does the Merkle proof mechanism exactly work in Ethereum? This is straightforward in bitcoin but

I've searched this site and elsewhere but can't find anywhere this is explained. In bitcoin, it's straightforward. If you're a light client (SPV) in bitcoin, I understand how with the regular Merkle ...
5 votes
0 answers

ETH2.0 Lightweight Clients?

Is it possible have SPV clients in ETH2.0? It feels like PoS cannot benefit from spv verification.
2 votes
1 answer

Sidechain communication with mainchain

I was exploring sidechains and two-way pegs but didn't clearly understand one point: How does a sidechain know if funds are locked in the main chain? To my understanding blockchains are "isolated" ...
15 votes
4 answers

How to experiment with Ethereum without downloading the entire blockchain?

I want to experiment with Ethereum without having to download the entire blockchain. My ISP limits my bandwidth to 50GB and downloading the ETH chain would consume a lot of that, not to mention the ...
4 votes
1 answer

Ethereum account model - SPV proofs possible?

Ethereum does use an account-model and not like Bitcoin an UTXO model. Is it possible to do SPV-proofs in Ethereum and if so, can you please explain how to do it? Correct me if I'm wong. The state ...
0 votes
0 answers

how to check if a block has a transaction to an address only by using the block header

Question is self explanatory. How can I check if a block has a transaction to or from an address only by using the block header? Question is prompted by this comment - How to explore all ...
8 votes
2 answers

Light clients for android

I am trying to develop an android wallet using Ethereum go and I ran the DroidGeth from this link. I tried to ran ethereum on the testnet, but its taking for ever to download the blockchain. How can ...
13 votes
1 answer

Are light nodes possible in Casper?

My understanding of light nodes is they need PoW in the block headers. That PoW proves that $x amount of energy has gone into securing that chain. With PoS, the proof that $y is securing the chain ...
8 votes
2 answers

Is there any SPV client for ethereum?

I am looking to move some ETH from an exchange to a wallet for which I control the keys. I don't, however, want to download the whole blockchain. Is there a good SPV client I can use?