Questions tagged [thin-clients]

Bitcoin clients that perform a reduced amount of processing or need a reduced amount of data compared with the Bitcoin Core client.

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Are the Thin clients Electrum and Multibit safe and secure?

How do Electrum and Multibit compare for being safe and secure. Both are open source. Are there any advantages, security wise, to use one or the other? I'm new to bitcoin and the only reason for ...
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15 votes
3 answers
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Copy wallet to Electrum or Multibit?

Is there a way to import my wallet from Bitcoin.org's client into the much lighter Multibit or Electrum? The disk space & bandwidth consumption (not exactly well presented to a beginner) quickly ...
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13 votes
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What is a thin client?

I've heard that if you don't want do download gigabytes of data just to use bitcoin you gotta use a thin client. But what is a thin client? What are the main advantages of a thin bitcoin client and ...
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11 votes
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Multibit vs Electrum - which is more mature and secure? [duplicate]

I'm having a hard time finding objective reviews / comparisons of these two 'lite' clients. Can someone who tried them both give some comments? Thanks
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2 answers
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How to backup Android Wallet?

I'm finally getting ready to install an Android client. I believe Android Wallet is the most popular one. How do I back up the bitcoins stored on it? Also, is there a thin native Android client ...
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10 votes
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How secure are various models of Bitcoin clients?

As there was some disagreement on security of various models of Bitcoin clients in comments to this answer, I'd like to address the problem. How secure are various models of Bitcoin clients? Those ...
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9 votes
3 answers
573 views

How popular are alternative clients?

Is there any data available on how many people use an alternative client in contrast to the Satoshi client? Alternatively, is there any data on how many times such clients have been downloaded?
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7 votes
4 answers
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What wallets currently support RBF?

What wallets currently support RBF? Is there some workaround if they don't?
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7 votes
2 answers
1k views

Is Electrum's SPV (thin-client) implementation not P2P (as opposed to Multibit's)?

As far as I know, when I use Electrum I'm just choosing servers to trust that hold the blockchain. But in this recently published article I read this about Multibit: It uses a slightly weaker ...
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6 votes
1 answer
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Can I run p2pool with a thin bitcoin client?

Everytime I restart my mining machine due to heat, I have to wait the following sequence to mine at p2pool: bitcoind -> download blockchain & rescan -> p2pool -> download shares -> ...
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6 votes
1 answer
3k views

What is "the gap limit" in Electrum?

I don't understand this explaination.
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6 votes
2 answers
263 views

Can a full node provide a bogus block bloomfilter to a Neutrino node?

When a thin client using BIP157/BIP158 (Neutrino) requests the block filter for the latest block, would it be possible for the full node serving this request to attack the Neutrino node by providing a ...
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6 votes
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Do thin clients leak which addresses you own?

According to this, thin clients use bloom filters to request "addresses and transactions they are interested in to the peer". And according to this, bloom filters are used to help prevent the SPV ...
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6 votes
1 answer
740 views

How do I generate offline transactions in Java?

I'd like to develop a Java binding to the Stratum Overlay Network (a server for thin clients). This requires signing on offline transactions. Can I directly use bitcoinj's API to do this? Can I copy-...
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5 votes
1 answer
734 views

Lightning network and lightweight clients

How will the lightning network handle lightweight clients? Do I understand it correctly that opening a payment channel require writing on the blockchain to protect against double-spend? The integrity ...
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5 votes
2 answers
112 views

Correlation of number of (non mining) full nodes to internet bandwidth

Are there any correlation studies showing the number of (non mining) full nodes per country (total or per/capita) compared to average internet connection speeds? I know there are great differences ...
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5 votes
1 answer
315 views

Are there live BitcoinJS Exit Nodes?

Where can I find some live (trusted?) BitcoinJS Exit Nodes? I'm looking it it from the client perspective - I want to write a Java app that doesn't store a blockchain. I don't want to setup an exit ...
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Why can the same 12 words produce different seeds in an Electrum wallet file?

I was looking through an Electrum wallet file (from Electrum 1.9.6 for Windows if it matters) trying to understand what information was contained in it, and I couldn't initially figure out exactly ...
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4 votes
4 answers
8k views

What's the best Android wallet client for bitcoin?

There are many bitcoin wallet clients on android market. What is the best considering security, interoperability and usability?
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4 votes
4 answers
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Why can't I spend my bitcoins when they have been fully confirmed?

I've used bitcoins for quite a while, but about a year ago I decided to dump having a thin client on my machine, and I've just kept my coins in various exchanges. Yesterday, however, I wanted to ...
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4 votes
1 answer
197 views

What client-side checks does blockchain's android client do?

Blockchain just came out with a great Android client, based on bitcoin-wallet. In the description it says "No blockchain downlaod [sic.]". However, in the documentation of their sources, they say "...
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4 votes
3 answers
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Thin client list

Is there a trusted thin client list somewhere? I searched one for OSX and one for Android and I found next to nothing. That is: nothing at all for OSX, and only a source-only on github for Android (...
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4 votes
2 answers
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Accepting Bitcoin payments without the full blockchain or third party APIs?

I want to make a basic program/script that utilizes Bitcoin payments, but I don't have the storage space to sync with the entire blockchain, and I don't want to be dependent on a third-party API like ...
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4 votes
1 answer
244 views

Lightweight client, bare necessities

What are the bare data necessities that a lightweight client would have to get from a server client in order to perform basic wallet tasks (show balance, transaction history, number of confirmations, ...
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3 votes
2 answers
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is it possible to decode block height from a blockhash?

I'm creating a bitcoin network client and I'm wondering if it's possible to decode the block height from a blockhash whenever I receive a new block inventory vector.
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3 votes
4 answers
2k views

Electrum 2.0: non-BIP39/32 standardisation complicates matters immensely. Why?

Electrum 2.0 has been causing me some frustration, insofar as it seems to be a non-standard implementation of BIP32/BIP39 (HD wallets, mnemonic seed, respectively). The wallet in question is a 2of2 ...
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3 votes
1 answer
196 views

How do light clients using compact block filters get relevant unconfirmed transactions?

I was discussing various light client models and we got into unconfirmed transactions. With the BIP37-based bloom filters, a light client would subscribe to updates from full node peers by submitting ...
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3 votes
2 answers
3k views

Is there a wallet like Multibit for Litecoin?

Is there a lightweight client like Multibit available for Litecoin? If not, is one in development?
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3 votes
1 answer
347 views

Do full nodes store the complete merkle tree or do they regenerate it when creating a merkle proof?

I understand what the merkle root is for. And I understand that blocks don't store the merkle tree. Question 1) Is there any place that the complete merkle trees get stored? I don't mean the merkle ...
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3 votes
2 answers
469 views

Who gives SPV nodes merkle path to do validation for small subset of transaction?

From Mastering bitcoin: Merkle trees are used extensively by SPV nodes. SPV nodes don’t have all transactions and do not download full blocks, just block headers. In order to verify that a transaction ...
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3 votes
1 answer
289 views

What hardware requirements does a SPV client have?

I read about SPVs here that: [A SPV] client downloads a complete copy of the headers for all blocks in the entire block chain. This means that the download and storage requirements scale linearly ...
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3 votes
1 answer
2k views

Thin command line-capable client for Linux

I need to set up linux server for web service that could generate bitcoin addresses and check the balance on them, etc (basically, receive payments in BTC). And I do not want to use third-party online ...
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3 votes
1 answer
221 views

In bitcoinj, why is MemoryBlockStore not used by default?

My understanding of bitcoinj is that it is used to implement a "thin client" that doesn't store the entire blockchain- just the headers. When I use the WalletAppKit, it creates a file "default....
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3 votes
0 answers
171 views

Electrum via command-line: can generic blockchain info be requested?

For example can I ask the Electrum client via it's API what the height or version of the latest block is? Looking through the docs all I currently see is wallet commands.
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2 votes
1 answer
445 views

Are lightweight LN wallets vulnerable to transaction withholding?

As far as I know, LN requires the user to watch the blockchain in order to perform penalty in time. However, running full node is probably a heavy burden to some users, especially to mobile phones. I ...
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2 votes
2 answers
425 views

c-lightning & Lightweight nodes (no local bitcoind)

I am trying to take advantage of the new release of c-lightning 0.6 that provide the ability to setup a lightweight node (i.e. No Local bitcoind instance running). But did not found any documentation ...
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2 votes
2 answers
685 views

Options for a Client Only C# application

If I want to create a client only, C# desktop application, what are my options for working with Bitcoin? I could try to port BitcoinJ, which seems like a lot of overhead in terms of initial effort ...
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2 votes
1 answer
344 views

How a thin node ensures the validity of blockchain?

How a thin node in network verify the validity of the blockchain tree? I think the node must wait for a time period to get the same valid block from some of its peers.
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2 votes
1 answer
2k views

Is there a mobile wallet that works with a Trezor?

Is there a mobile wallet that support using a Trezor hardware wallet to spend coins? Is there an online resource that tracks features like this for thin-clients?
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2 votes
1 answer
142 views

How does MultiBit figure out balance of an imported address? [duplicate]

MultiBit is a Simplified Payment Verification (SPV) client that uses the merkle root of block headers to validate transactions. I'm wondering however, when an address (private key) is imported into ...
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2 votes
1 answer
523 views

What service does Multibit connect to? [duplicate]

Multibit is clearly a faster desktop wallet since it's a thin client that doesn't download and process the entire *8GB blockchain. My question is, what service does Multibit connect to in order to ...
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2 votes
1 answer
162 views

Wallet for btc bot

Which bitcoin wallet should I use to manipulate it programmatically? I don't want to use heavy bitcoin-core. But as I understand there are different kinds of bitcoin's thin clients: some outsource ...
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2 votes
0 answers
100 views

Running TorBB on host machine while running Whonix VM setup as guest on the same physical box

I've currently set up Whonix VMs using Virtual Box on OS X 10.11.6. Before that I was using a Bitcoin-qt with Tor Browser Bundle. Now I'm having question what is a best way to use bitcoin+tor setup ...
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1 vote
2 answers
71 views

Why does a thin node need to know if a transaction is present in specific block's merkle tree?

I understand what a merkle root is and how merkle proofs work. It's all about thin nodes checking whether a specific transaction ID is in a specific block. So, thin node says: I have a transaction ID -...
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1 vote
1 answer
269 views

Lightning node on a Bitcoin SPV

is there a way to run a Lightning node on a Bitcoin SPV node at the moment? I've read that both lnd and c-lightning need a Bitcoin Fullnode at this time. This might seem ignorant but i don't want to ...
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1 vote
3 answers
221 views

Does a thin client testnet wallet exist which allows offline signing?

I appreciate I can do offline singing with bitcoin-core, but it's complex. To make it easier, I would have to download the entire blockchain. I have searched up electrum, but can't seem to find a ...
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1 vote
1 answer
116 views

thin-client remote node lying through omission

is there a way for a non-full node (ie a node which does not contain the full blockchain) to know when it has received all transactions associated with an address? i understand that it is possible for ...
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  • 1,693
1 vote
1 answer
75 views

Is it possible to create a thin client that only listens for transactions and pending transactions?

I looked into using a thin client but even thin clients implement SPV (Simple Payment Verification). What if you just wanted a client that only listens for transactions/pending transactions, doesn't ...
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  • 157
1 vote
1 answer
95 views

Which Bitcoin thin client that can execute on restricted IoT devices?

I am trying to find a suitable Bitcoin thin client for IoT devices with Linux OSs. IoT devices will act as peers as thin clients, and the selection criteria for the thin client is least CPU, memory ...
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1 vote
1 answer
377 views

How long does it take for a SPV to intermittently sync (order of magnitude)?

Say I have a device that is mostly offline, with a SPV on it. Say once in a while (for instance once a week) I go online for about 20 minutes, and make a large number of transactions (which are ...
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