Questions tagged [light-clients]

light or thin clients do not store the whole blockchain and are used on mobile, embedded or IoT devices

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Concept of Geth Light Client for Mobile

Need to understand how the Geth's light client parameter works. I want to understand the algorithm. Whether some part of the blockchain will be downloaded or will not download anything. In both cases ...
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1answer
1k views

How large are the Ethereum block headers?

I am interested in knowing the block header size to estimate the overhead of running an Ethereum light client.
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1answer
2k views

What can I use to interact with the Ethereum network from an Android device?

From my research, until I can build an Ethereum node on an Android device I’ll need to use a public API to interact with the network, such as BlockApps (http://www.blockapps.net/documentation#...
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1answer
550 views

Is it possible to mine on testnet using --light option?

Iw ould like to get some testnet eth on my wallet, but don't want to download the testnet but start geth with --light. Would that be possible?
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1answer
523 views

How can I call contract's function from the Jaxx wallet?

As I know, at this date there is no Ethereum's light wallets, which supports contracts. But in Jaxx wallet, it's possible to send some Custom Data to the contract. So, the question is: if I have a ...
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0answers
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Time to first block

I am experience long waiting times from start of the block-sync to the first block. Is there any way I can speed this up? 02-08 17:21:37.971 23640 23659 E GoLog : I0208 16:21:37.980483 eth/...
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2answers
756 views

How to use parity 1.4.2 with light-client mode?

I've tried to use the latest geth with --light mode. It gets new blocks not very fast, but I could send transactions successfully. So I think it's useful! What command should run parity in this mode?
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1answer
1k views

How to connect an Android App user to ethereum network?

I'm working on developing a decentralized application which requires every user of the Android app to have separate account containing his ether balance information and other user-specific information....
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0answers
79 views

How to estimate capex and opex

I'm doing some research about the use of open blockchain in different context. I'm trying to find the best way to evaluate capex and opex for: hardware requirements (full node vs light node with geth ...
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0answers
196 views

How to derive the private key from UTC file? [duplicate]

I want to implement a client-side wallet where the transaction is generated and signed on the browser, and sent to the server which is running a geth node. Apparently ethereumjs-tx does what I want ...
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2k views

Ethereum Wallet is “looking for peers” with geth --light

It should be possible to combine Ethereum Wallet and/or Mist Browser together with geth --light Unfortunately Ethereum Wallet is "looking for peers" for eternity then, even if the log shows no ...
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2answers
2k views

Ethereum light client roadmap?

The Ethereum roadmap makes no mention about when to expect a light client. Anyone has any insights on when we could expect to see a light client that could efficiently run on, say, an Android device?
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1answer
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How does spam prevention work in light clients?

When you have a full client it means that everything that is stored on the Blockchain is on your computer. When you call a static function on some contract through web3, for example, there are no ...
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2answers
1k views

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 ...
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287 views

How to installl eth-lightWallet?

I am trying to install the ethereum-lightwallet on my system. I am experiencing a problem with npm. When I run npm install eth-lightwallet I get a message: └─┬ eth-lightwallet@2.5.2 ├── ...
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1answer
3k views

Difference between a pruned and unpruned blockchain

At the Berlin Blockchain Meetup, Gustav Simonsson teased the Homestead release coming soon (tm) and we were discussing blockchain bloat and the current size of the Ethereum blockchain. We discussed ...
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3answers
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Can Ethereum or Mist run on Raspberry Pi 1, 2, 3, or Zero?

Would an ethereum client or mist be able to run on a raspberry pi? It's a simple yes or no question with an explanation. I don't want links to "light" versions of ethereum, as that's not what I'm ...
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1answer
909 views

size of blockchain on hard disk for ethereum light clients

whats the size of block headers ( minified blockchain) that ethereum light clients are using? how much is the size of the blockchain data required for the light clients to do a transaction and veryfy ...
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1answer
431 views

How hard is it for Ethereum clients to get on the new fork in case of an attack?

Vitalik Buterin writes: Assuming ~20% participation in PoS and current prices, you could stall or break the network at a cost of ~$7 million. However, unlike PoW, recovery is simpler: Ethereum just ...
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1answer
883 views

Is it possible to import a Jaxx walet into Mist?

I have installed Jaxx on my smartphone and have some ETH in it, I've sen a small amount to the DAO address. If I at a later stage want to intereact with the DAO and Jaxx doesn't allow for this, is it ...
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1answer
770 views

Walk-Through Creation of a Personal Two-Factor Authentication Wallet / Contract

I would like to create a multi-signature wallet to store large amounts of Ether with at least one signature from my Android phone (the other from my PC and/or another phone). What would be the ...
11
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2answers
319 views

Does a light client require a chain of trust towards full nodes?

A full client does not need to trust any individual node on the Ethereum network, as the full client can see the activity from all nodes and discard any inconsistencies caused by ill intentioned nodes ...
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1answer
176 views

How can I avoid trusting any one node?

I read with interest the status of the light client protocol. However, I do not see addressed anywhere I can find how to implement a system where I don't have to trust any one single node such as a ...
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2answers
288 views

Importing presale wallet into Geth without downloading all the blockchain

Importing presale wallet into Geth without downloading all the blockchain I was wondering if it is possible to import a presale wallet into Geth without downloading the whole blockchain. I mean, is ...
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1answer
343 views

Can Ethereum be pruned to the extent that it could be run from a Raspberry Pi?

What are the limits to how much the ETH blockchain can be pruned. Will ETH ever be practical on devices with limited resources such as a Raspberry Pi, Android or iOS wallet?
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1answer
543 views

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 ...
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1answer
787 views

Is there any Ethereum online light-client/wallet that can accept smart contracts?

There are plenty of online wallets (e.g. Ethereumwallet, MyEtherWallet, Jaxx Bitcoin and Ethereum Wallet - Chrome extensions, etc.) but I did not find any wallet that has the ability to add a contract ...
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1answer
2k views

How can Hooked-Web3-Provider and Lightwallet work together?

Does anyone know some good working examples of the Eth-Lightwallet and the Hooked-Web3-Provider working together? I was trying to get https://github.com/ConsenSys/eth-lightwallet/blob/master/example/...
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3answers
4k views

Is it possible to run the Ethereum Wallet with a remote Blockchain?

To run the Ethereum Wallet on a small computer like a Phone or a Netbook it would useful to have a light client, possibly that connects to a hosted full Ethereum node. Is this currently possible?
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1answer
1k views

How can I connect to ethereum with only a web browser to monitor a contract

AFAICT it requires a node such as geth to connect to ethereum to get or change contract state. I only need to get state, not change state, but I want to do it only from a web browser. I don't want ...
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2answers
392 views

How to enable Ethereum support in the JAXX mobile wallet?

Jaxx by Kryptokit offers Bitcoin and Ethereum for mobile and browsers. I installed the wallet on my Android device. But it only offers Bitcoin functionality. I see screenshots online which displays ...
3
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1answer
991 views

What is the purpose of multiple addresses in a wallet?

In eth-lightwallet from consensys there is a function generateNewAddress. What is the purpose of having multiple addresses for the same account? I can think of a few usages: accounting solution: 1 ...
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1answer
57 views

What are the design targets which the light client is being developed against?

For example: persistent storage? volatile storage? connectivity? The closest I could get to a definition for the above is the following: "1KB of data per 2 minutes". However the following remains ...
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3k views

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?
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1answer
212 views

How to offer free DApps for users without any barriers? [duplicate]

How to offer decentralized applications or services for users without introducing any barriers like running a full ethereum node? enabling rpc api on the node? explaining the user which rpc cors ...
5
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1answer
136 views

Why do dapp websites ask me to connect to them?

I don't understand why we need to run our own nodes to be using a DApp? Can they just run their own nodes instead?
8
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1answer
235 views

Is ethereumwallet.com generating the keys client-side?

Is ethereumwallet.com generating the all the keys, accounts and transactions client-side? Is it legit and safe to use? Is it possible to confirm the javascript has no backdoors? Can it be trusted?
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1answer
138 views

Are there any barriers to implementing an ethereum node as a chrome or firefox extension?

Is it possible to create a Firefox or Chrome extension which ran either a full node or light node?