Where can I find my bitcoin address? Bitcoin.com Wallet FAQ

Bitcoin Jobs Board - earn Bitcoin Cash (BCH) or Bitcoin (BTC)

Bitcoin Jobs board - earn Bitcoin Cash (BCH) or Bitcoin (BTC)
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Bitcoin Mining Forums: Turning Computers Into Cash Since 2011

The official bitcoin mining forum / subreddit / chat room / place to be!
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bitcoin in Aotearoa

A sub to chat all things bitcoin in New Zealand.
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Search for Bitcoin Addresses by Substring?

Say I have a bitcoin address that starts with "15uqx7jmc", but I don't know the rest of it. How do I find a list of bitcoin addresses (using a popular online tool) that have at one point held a balance (or still have a balance) that start with this string? There's probably only one address like this. Thanks in advance!
submitted by ThePiGuy2 to Bitcoin [link] [comments]

Search for bitcoin addresses/transactions by amount of bitcoins, such as in a SQL query

I want to find the United States' public bitcoin address as detailed in recent court documents.
This should be possible in a simple SQL-like query since we know the bitcoin amounts of the silkroad addresses seized, and we know the range of the amount of bitcoins to look for, these of which will be statistical outliers in a date range
so does anyone have a publicly accessible way to do this kind of search?
submitted by cqm to Bitcoin [link] [comments]

How to search node/blockchain for pub address transactions/totals (offline)? (x-post from /r/Bitcoin)

submitted by ASICmachine to CryptoCurrencyClassic [link] [comments]

Question: Aside from linking through block explorer searches and IP addresses, is it possible for different bitcoin addresses from the same seed to be associated with each other?

For example, say a wallet has an address with a single UTXO which is easily linked to where it was bought on a KYC exchange, and you then send some coinjoined coins from wasabi to a newly generated address in the same wallet, is the privacy of the ‘private’ UTXO immediately compromised? Or is it essentially impossible to tell the two addresses are derived from the same seed? Thank you
submitted by Jademunky to Bitcoin [link] [comments]

Blockchair on Twitter - "We’re working on #CashAccounts implementation for our Bitcoin Cash explorer. This will include both showing the proposed format on address pages, and ability to search by account names."

Blockchair on Twitter - submitted by DylanKid to btc [link] [comments]

Best low-fee way (can do 1%) to buy $100 of bitcoin per transaction ANONYMOUSLY (aside from card or paypal address being known) with paypal or a credit card right now? Been searching for about an hour already. Thanks in advance!

submitted by THE_DHARMAKAYA to Bitcoin [link] [comments]

Preventing double-spends is an "embarrassingly parallel" massive search problem - like Google, [email protected], [email protected], or PrimeGrid. BUIP024 "address sharding" is similar to Google's MapReduce & Berkeley's BOINC grid computing - "divide-and-conquer" providing unlimited on-chain scaling for Bitcoin.

TL;DR: Like all other successful projects involving "embarrassingly parallel" search problems in massive search spaces, Bitcoin can and should - and inevitably will - move to a distributed computing paradigm based on successful "sharding" architectures such as Google Search (based on Google's MapReduce algorithm), or [email protected], [email protected], or PrimeGrid (based on Berkeley's BOINC grid computing architecture) - which use simple mathematical "decompose" and "recompose" operations to break big problems into tiny pieces, providing virtually unlimited scaling (plus fault tolerance) at the logical / software level, on top of possibly severely limited (and faulty) resources at the physical / hardware level.
The discredited "heavy" (and over-complicated) design philosophy of centralized "legacy" dev teams such as Core / Blockstream (requiring every single node to download, store and verify the massively growing blockchain, and pinning their hopes on non-existent off-chain vaporware such as the so-called "Lightning Network" which has no mathematical definition and is missing crucial components such as decentralized routing) is doomed to failure, and will be out-competed by simpler on-chain "lightweight" distributed approaches such as distributed trustless Merkle trees or BUIP024's "Address Sharding" emerging from independent devs such as u/thezerg1 (involved with Bitcoin Unlimited).
No one in their right mind would expect Google's vast search engine to fit entirely on a Raspberry Pi behind a crappy Internet connection - and no one in their right mind should expect Bitcoin's vast financial network to fit entirely on a Raspberry Pi behind a crappy Internet connection either.
Any "normal" (ie, competent) company with $76 million to spend could provide virtually unlimited on-chain scaling for Bitcoin in a matter of months - simply by working with devs who would just go ahead and apply the existing obvious mature successful tried-and-true "recipes" for solving "embarrassingly parallel" search problems in massive search spaces, based on standard DISTRIBUTED COMPUTING approaches like Google Search (based on Google's MapReduce algorithm), or [email protected], [email protected], or PrimeGrid (based on Berkeley's BOINC grid computing architecture). The fact that Blockstream / Core devs refuse to consider any standard DISTRIBUTED COMPUTING approaches just proves that they're "embarrassingly stupid" - and the only way Bitcoin will succeed is by routing around their damage.
Proven, mature sharding architectures like the ones powering Google Search, [email protected], [email protected], or PrimeGrid will allow Bitcoin to achieve virtually unlimited on-chain scaling, with minimal disruption to the existing Bitcoin network topology and mining and wallet software.
Longer Summary:
People who argue that "Bitcoin can't scale" - because it involves major physical / hardware requirements (lots of processing power, upload bandwidth, storage space) - are at best simply misinformed or incompetent - or at worst outright lying to you.
Bitcoin mainly involves searching the blockchain to prevent double-spends - and so it is similar to many other projects involving "embarrassingly parallel" searching in massive search spaces - like Google Search, [email protected], [email protected], or PrimeGrid.
But there's a big difference between those long-running wildly successful massively distributed infinitely scalable parallel computing projects, and Bitcoin.
Those other projects do their data storage and processing across a distributed network. But Bitcoin (under the misguided "leadership" of Core / Blockstream devs) instists on a fatally flawed design philosophy where every individual node must be able to download, store and verify the system's entire data structure. And it's even wore than that - they want to let the least powerful nodes in the system dictate the resource requirements for everyone else.
Meanwhile, those other projects are all based on some kind of "distributed computing" involving "sharding". They achieve massive scaling by adding a virtually unlimited (and fault-tolerant) logical / software layer on top of the underlying resource-constrained / limited physical / hardware layer - using approaches like Google's MapReduce algorithm or Berkeley's Open Infrastructure for Network Computing (BOINC) grid computing architecture.
This shows that it is a fundamental error to continue insisting on viewing an individual Bitcoin "node" as the fundamental "unit" of the Bitcoin network. Coordinated distributed pools already exist for mining the blockchain - and eventually coordinated distributed trustless architectures will also exist for verifying and querying it. Any architecture or design philosophy where a single "node" is expected to be forever responsible for storing or verifying the entire blockchain is the wrong approach, and is doomed to failure.
The most well-known example of this doomed approach is Blockstream / Core's "roadmap" - which is based on two disastrously erroneous design requirements:
  • Core / Blockstream erroneously insist that the entire blockchain must always be downloadable, storable and verifiable on a single node, as dictated by the least powerful nodes in the system (eg, u/bitusher in Costa Rica), or u/Luke-Jr in the underserved backwoods of Florida); and
  • Core / Blockstream support convoluted, incomplete off-chain scaling approaches such as the so-called "Lightning Network" - which lacks a mathematical foundation, and also has some serious gaps (eg, no solution for decentralized routing).
Instead, the future of Bitcoin will inevitably be based on unlimited on-chain scaling, where all of Bitcoin's existing algorithms and data structures and networking are essentially preserved unchanged / as-is - but they are distributed at the logical / software level using sharding approaches such as u/thezerg1's BUIP024 or distributed trustless Merkle trees.
These kinds of sharding architectures will allow individual nodes to use a minimum of physical resources to access a maximum of logical storage and processing resources across a distributed network with virtually unlimited on-chain scaling - where every node will be able to use and verify the entire blockchain without having to download and store the whole thing - just like Google Search, [email protected], [email protected], or PrimeGrid and other successful distributed sharding-based projects have already been successfully doing for years.
Details:
Sharding, which has been so successful in many other areas, is a topic that keeps resurfacing in various shapes and forms among independent Bitcoin developers.
The highly successful track record of sharding architectures on other projects involving "embarrassingly parallel" massive search problems (harnessing resource-constrained machines at the physical level into a distributed network at the logical level, in order to provide fault tolerance and virtually unlimited scaling searching for web pages, interstellar radio signals, protein sequences, or prime numbers in massive search spaces up to hundreds of terabytes in size) provides convincing evidence that sharding architectures will also work for Bitcoin (which also requires virtually unlimited on-chain scaling, searching the ever-expanding blockchain for previous "spends" from an existing address, before appending a new transaction from this address to the blockchain).
Below are some links involving proposals for sharding Bitcoin, plus more discussion and related examples.
BUIP024: Extension Blocks with Address Sharding
https://np.reddit.com/btc/comments/54afm7/buip024_extension_blocks_with_address_sharding/
Why aren't we as a community talking about Sharding as a scaling solution?
https://np.reddit.com/Bitcoin/comments/3u1m36/why_arent_we_as_a_community_talking_about/
(There are some detailed, partially encouraging comments from u/petertodd in that thread.)
[Brainstorming] Could Bitcoin ever scale like BitTorrent, using something like "mempool sharding"?
https://np.reddit.com/btc/comments/3v070a/brainstorming_could_bitcoin_ever_scale_like/
[Brainstorming] "Let's Fork Smarter, Not Harder"? Can we find some natural way(s) of making the scaling problem "embarrassingly parallel", perhaps introducing some hierarchical (tree) structures or some natural "sharding" at the level of the network and/or the mempool and/or the blockchain?
https://np.reddit.com/btc/comments/3wtwa7/brainstorming_lets_fork_smarter_not_harder_can_we/
"Braiding the Blockchain" (32 min + Q&A): We can't remove all sources of latency. We can redesign the "chain" to tolerate multiple simultaneous writers. Let miners mine and validate at the same time. Ideal block time / size / difficulty can become emergent per-node properties of the network topology
https://np.reddit.com/btc/comments/4su1gf/braiding_the_blockchain_32_min_qa_we_cant_remove/
Some kind of sharding - perhaps based on address sharding as in BUIP024, or based on distributed trustless Merkle trees as proposed earlier by u/thezerg1 - is very likely to turn out to be the simplest, and safest approach towards massive on-chain scaling.
A thought experiment showing that we already have most of the ingredients for a kind of simplistic "instant sharding"
A simplistic thought experiment can be used to illustrate how easy it could be to do sharding - with almost no changes to the existing Bitcoin system.
Recall that Bitcoin addresses and keys are composed from an alphabet of 58 characters. So, in this simplified thought experiment, we will outline a way to add a kind of "instant sharding" within the existing system - by using the last character of each address in order to assign that address to one of 58 shards.
(Maybe you can already see where this is going...)
Similar to vanity address generation, a user who wants to receive Bitcoins would be required to generate 58 different receiving addresses (each ending with a different character) - and, similarly, miners could be required to pick one of the 58 shards to mine on.
Then, when a user wanted to send money, they would have to look at the last character of their "send from" address - and also select a "send to" address ending in the same character - and presto! we already have a kind of simplistic "instant sharding". (And note that this part of the thought experiment would require only the "softest" kind of soft fork: indeed, we haven't changed any of the code at all, but instead we simply adopted a new convention by agreement, while using the existing code.)
Of course, this simplistic "instant sharding" example would still need a few more features in order to be complete - but they'd all be fairly straightforward to provide:
  • A transaction can actually send from multiple addresses, to multiple addresses - so the approach of simply looking at the final character of a single (receive) address would not be enough to instantly assign a transaction to a particular shard. But a slightly more sophisticated decision criterion could easily be developed - and computed using code - to assign every transaction to a particular shard, based on the "from" and "to" addresses in the transaction. The basic concept from the "simplistic" example would remain the same, sharding the network based on some characteristic of transactions.
  • If we had 58 shards, then the mining reward would have to be decreased to 1/58 of what it currently is - and also the mining hash power on each of the shards would end up being roughly 1/58 of what it is now. In general, many people might agree that decreased mining rewards would actually be a good thing (spreading out mining rewards among more people, instead of the current problems where mining is done by about 8 entities). Also, network hashing power has been growing insanely for years, so we probably have way more than enough needed to secure the network - after all, Bitcoin was secure back when network hash power was 1/58 of what it is now.
  • This simplistic example does not handle cases where you need to do "cross-shard" transactions. But it should be feasible to implement such a thing. The various proposals from u/thezerg1 such as BUIP024 do deal with "cross-shard" transactions.
(Also, the fact that a simplified address-based sharding mechanics can be outlined in just a few paragraphs as shown here suggests that this might be "simple and understandable enough to actually work" - unlike something such as the so-called "Lightning Network", which is actually just a catchy-sounding name with no clearly defined mechanics or mathematics behind it.)
Addresses are plentiful, and can be generated locally, and you can generate addresses satisfying a certain pattern (eg ending in a certain character) the same way people can already generate vanity addresses. So imposing a "convention" where the "send" and "receive" address would have to end in the same character (and where the miner has to only mine transactions in that shard) - would be easy to understand and do.
Similarly, the earlier solution proposed by u/thezerg1, involving distributed trustless Merkle trees, is easy to understand: you'd just be distributing the Merkle tree across multiple nodes, while still preserving its immutablity guarantees.
Such approaches don't really change much about the actual system itself. They preserve the existing system, and just split its data structures into multiple pieces, distributed across the network. As long as we have the appropriate operators for decomposing and recomposing the pieces, then everything should work the same - but more efficiently, with unlimited on-chain scaling, and much lower resource requirements.
The examples below show how these kinds of "sharding" approaches have already been implemented successfully in many other systems.
Massive search is already efficiently performed with virtually unlimited scaling using divide-and-conquer / decompose-and-recompose approaches such as MapReduce and BOINC.
Every time you do a Google search, you're using Google's MapReduce algorithm to solve an embarrassingly parallel problem.
And distributed computing grids using the Berkeley Open Infrastructure for Network Computing (BOINC) are constantly setting new records searching for protein combinations, prime numbers, or radio signals from possible intelligent life in the universe.
We all use Google to search hundreds of terabytes of data on the web and get results in a fraction of a second - using cheap "commodity boxes" on the server side, and possibly using limited bandwidth on the client side - with fault tolerance to handle crashing servers and dropped connections.
Other examples are [email protected], [email protected] and PrimeGrid - involving searching massive search spaces for protein sequences, interstellar radio signals, or prime numbers hundreds of thousands of digits long. Each of these examples uses sharding to decompose a giant search space into smaller sub-spaces which are searched separately in parallel and then the resulting (sub-)solutions are recomposed to provide the overall search results.
It seems obvious to apply this tactic to Bitcoin - searching the blockchain for existing transactions involving a "send" from an address, before appending a new "send" transaction from that address to the blockchain.
Some people might object that those systems are different from Bitcoin.
But we should remember that preventing double-spends (the main thing that the Bitcoin does) is, after all, an embarrassingly parallel massive search problem - and all of these other systems also involve embarrassingly parallel massive search problems.
The mathematics of Google's MapReduce and Berkeley's BOINC is simple, elegant, powerful - and provably correct.
Google's MapReduce and Berkeley's BOINC have demonstrated that in order to provide massive scaling for efficient searching of massive search spaces, all you need is...
  • an appropriate "decompose" operation,
  • an appropriate "recompose" operation,
  • the necessary coordination mechanisms
...in order to distribute a single problem across multiple, cheap, fault-tolerant processors.
This allows you to decompose the problem into tiny sub-problems, solving each sub-problem to provide a sub-solution, and then recompose the sub-solutions into the overall solution - gaining virtually unlimited scaling and massive efficiency.
The only "hard" part involves analyzing the search space in order to select the appropriate DECOMPOSE and RECOMPOSE operations which guarantee that recomposing the "sub-solutions" obtained by decomposing the original problem is equivalent to the solving the original problem. This essential property could be expressed in "pseudo-code" as follows:
  • (DECOMPOSE ; SUB-SOLVE ; RECOMPOSE) = (SOLVE)
Selecting the appropriate DECOMPOSE and RECOMPOSE operations (and implementing the inter-machine communication coordination) can be somewhat challenging, but it's certainly doable.
In fact, as mentioned already, these things have already been done in many distributed computing systems. So there's hardly any "original work to be done in this case. All we need to focus on now is translating the existing single-processor architecture of Bitcoin to a distributed architecture, adopting the mature, proven, efficient "recipes" provided by the many examples of successful distributed systems already up and running like such as Google Search (based on Google's MapReduce algorithm), or [email protected], [email protected], or PrimeGrid (based on Berkeley's BOINC grid computing architecture).
That's what any "competent" company with $76 million to spend would have done already - simply work with some devs who know how to implement open-source distributed systems, and focus on adapting Bitcoin's particular data structures (merkle trees, hashed chains) to a distributed environment. That's a realistic roadmap that any team of decent programmers with distributed computing experience could easily implement in a few months, and any decent managers could easily manage and roll out on a pre-determined schedule - instead of all these broken promises and missed deadlines and non-existent vaporware and pathetic excuses we've been getting from the incompetent losers and frauds involved with Core / Blockstream.
ASIDE: MapReduce and BOINC are based on math - but the so-called "Lightning Network" is based on wishful thinking involving kludges on top of workarounds on top of hacks - which is how you can tell that LN will never work.
Once you have succeeded in selecting the appropriate mathematical DECOMPOSE and RECOMPOSE operations, you get simple massive scaling - and it's also simple for anyone to verify that these operations are correct - often in about a half-page of math and code.
An example of this kind of elegance and brevity (and provable correctness) involving compositionality can be seen in this YouTube clip by the accomplished mathematician Lucius Greg Meredith presenting some operators for scaling Ethereum - in just a half page of code:
https://youtu.be/uzahKc_ukfM?t=1101
Conversely, if you fail to select the appropriate mathematical DECOMPOSE and RECOMPOSE operations, then you end up with a convoluted mess of wishful thinking - like the "whitepaper" for the so-called "Lightning Network", which is just a cool-sounding name with no actual mathematics behind it.
The LN "whitepaper" is an amateurish, non-mathematical meandering mishmash of 60 pages of "Alice sends Bob" examples involving hacks on top of workarounds on top of kludges - also containing a fatal flaw (a lack of any proposed solution for doing decentralized routing).
The disaster of the so-called "Lightning Network" - involving adding never-ending kludges on top of hacks on top of workarounds (plus all kinds of "timing" dependencies) - is reminiscent of the "epicycles" which were desperately added in a last-ditch attempt to make Ptolemy's "geocentric" system work - based on the incorrect assumption that the Sun revolved around the Earth.
This is how you can tell that the approach of the so-called "Lightning Network" is simply wrong, and it would never work - because it fails to provide appropriate (and simple, and provably correct) mathematical DECOMPOSE and RECOMPOSE operations in less than a single page of math and code.
Meanwhile, sharding approaches based on a DECOMPOSE and RECOMPOSE operation are simple and elegant - and "functional" (ie, they don't involve "procedural" timing dependencies like keeping your node running all the time, or closing out your channel before a certain deadline).
Bitcoin only has 6,000 nodes - but the leading sharding-based projects have over 100,000 nodes, with no financial incentives.
Many of these sharding-based projects have many more nodes than the Bitcoin network.
The Bitcoin network currently has about 6,000 nodes - even though there are financial incentives for running a node (ie, verifying your own Bitcoin balance.
[email protected] and [email protected] each have over 100,000 active users - even though these projects don't provide any financial incentives. This higher number of users might be due in part the the low resource demands required in these BOINC-based projects, which all are based on sharding the data set.
[email protected]
As part of the client-server network architecture, the volunteered machines each receive pieces of a simulation (work units), complete them, and return them to the project's database servers, where the units are compiled into an overall simulation.
In 2007, Guinness World Records recognized [email protected] as the most powerful distributed computing network. As of September 30, 2014, the project has 107,708 active CPU cores and 63,977 active GPUs for a total of 40.190 x86 petaFLOPS (19.282 native petaFLOPS). At the same time, the combined efforts of all distributed computing projects under BOINC totals 7.924 petaFLOPS.
[email protected]
Using distributed computing, [email protected] sends the millions of chunks of data to be analyzed off-site by home computers, and then have those computers report the results. Thus what appears an onerous problem in data analysis is reduced to a reasonable one by aid from a large, Internet-based community of borrowed computer resources.
Observational data are recorded on 2-terabyte SATA hard disk drives at the Arecibo Observatory in Puerto Rico, each holding about 2.5 days of observations, which are then sent to Berkeley. Arecibo does not have a broadband Internet connection, so data must go by postal mail to Berkeley. Once there, it is divided in both time and frequency domains work units of 107 seconds of data, or approximately 0.35 megabytes (350 kilobytes or 350,000 bytes), which overlap in time but not in frequency. These work units are then sent from the [email protected] server over the Internet to personal computers around the world to analyze.
Data is merged into a database using [email protected] computers in Berkeley.
The [email protected] distributed computing software runs either as a screensaver or continuously while a user works, making use of processor time that would otherwise be unused.
Active users: 121,780 (January 2015)
PrimeGrid
PrimeGrid is a distributed computing project for searching for prime numbers of world-record size. It makes use of the Berkeley Open Infrastructure for Network Computing (BOINC) platform.
Active users 8,382 (March 2016)
MapReduce
A MapReduce program is composed of a Map() procedure (method) that performs filtering and sorting (such as sorting students by first name into queues, one queue for each name) and a Reduce() method that performs a summary operation (such as counting the number of students in each queue, yielding name frequencies).
How can we go about developing sharding approaches for Bitcoin?
We have to identify a part of the problem which is in some sense "invariant" or "unchanged" under the operations of DECOMPOSE and RECOMPOSE - and we also have to develop a coordination mechanism which orchestrates the DECOMPOSE and RECOMPOSE operations among the machines.
The simplistic thought experiment above outlined an "instant sharding" approach where we would agree upon a convention where the "send" and "receive" address would have to end in the same character - instantly providing a starting point illustrating some of the mechanics of an actual sharding solution.
BUIP024 involves address sharding and deals with the additional features needed for a complete solution - such as cross-shard transactions.
And distributed trustless Merkle trees would involve storing Merkle trees across a distributed network - which would provide the same guarantees of immutability, while drastically reducing storage requirements.
So how can we apply ideas like MapReduce and BOINC to providing massive on-chain scaling for Bitcoin?
First we have to examine the structure of the problem that we're trying to solve - and we have to try to identify how the problem involves a massive search space which can be decomposed and recomposed.
In the case of Bitcoin, the problem involves:
  • sequentializing (serializing) APPEND operations to a blockchain data structure
  • in such a way as to avoid double-spends
Can we view "preventing Bitcoin double-spends" as a "massive search space problem"?
Yes we can!
Just like Google efficiently searches hundreds of terabytes of web pages for a particular phrase (and [email protected], [email protected], PrimeGrid etc. efficiently search massive search spaces for other patterns), in the case of "preventing Bitcoin double-spends", all we're actually doing is searching a massive seach space (the blockchain) in order to detect a previous "spend" of the same coin(s).
So, let's imagine how a possible future sharding-based architecture of Bitcoin might look.
We can observe that, in all cases of successful sharding solutions involving searching massive search spaces, the entire data structure is never stored / searched on a single machine.
Instead, the DECOMPOSE and RECOMPOSE operations (and the coordination mechanism) a "virtual" layer or grid across multiple machines - allowing the data structure to be distributed across all of them, and allowing users to search across all of them.
This suggests that requiring everyone to store 80 Gigabytes (and growing) of blockchain on their own individual machine should no longer be a long-term design goal for Bitcoin.
Instead, in a sharding environment, the DECOMPOSE and RECOMPOSE operations (and the coordination mechanism) should allow everyone to only store a portion of the blockchain on their machine - while also allowing anyone to search the entire blockchain across everyone's machines.
This might involve something like BUIP024's "address sharding" - or it could involve something like distributed trustless Merkle trees.
In either case, it's easy to see that the basic data structures of the system would remain conceptually unaltered - but in the sharding approaches, these structures would be logically distributed across multiple physical devices, in order to provide virtually unlimited scaling while dramatically reducing resource requirements.
This would be the most "conservative" approach to scaling Bitcoin: leaving the data structures of the system conceptually the same - and just spreading them out more, by adding the appropriately defined mathematical DECOMPOSE and RECOMPOSE operators (used in successful sharding approaches), which can be easily proven to preserve the same properties as the original system.
Conclusion
Bitcoin isn't the only project in the world which is permissionless and distributed.
Other projects (BOINC-based permisionless decentralized [email protected], [email protected], and PrimeGrid - as well as Google's (permissioned centralized) MapReduce-based search engine) have already achieved unlimited scaling by providing simple mathematical DECOMPOSE and RECOMPOSE operations (and coordination mechanisms) to break big problems into smaller pieces - without changing the properties of the problems or solutions. This provides massive scaling while dramatically reducing resource requirements - with several projects attracting over 100,000 nodes, much more than Bitcoin's mere 6,000 nodes - without even offering any of Bitcoin's financial incentives.
Although certain "legacy" Bitcoin development teams such as Blockstream / Core have been neglecting sharding-based scaling approaches to massive on-chain scaling (perhaps because their business models are based on misguided off-chain scaling approaches involving radical changes to Bitcoin's current successful network architecture, or even perhaps because their owners such as AXA and PwC don't want a counterparty-free new asset class to succeed and destroy their debt-based fiat wealth), emerging proposals from independent developers suggest that on-chain scaling for Bitcoin will be based on proven sharding architectures such as MapReduce and BOINC - and so we should pay more attention to these innovative, independent developers who are pursuing this important and promising line of research into providing sharding solutions for virtually unlimited on-chain Bitcoin scaling.
submitted by ydtm to btc [link] [comments]

Blockchair on Twitter - "Were working on #CashAccounts implementation for our Bitcoin Cash explorer. This will include both showing the proposed format on address pages, and ability to search by account names."

Blockchair on Twitter - submitted by ABitcoinAllBot to BitcoinAll [link] [comments]

How large is the search space for brainwallet address? /r/Bitcoin

How large is the search space for brainwallet address? /Bitcoin submitted by ABitcoinAllBot to BitcoinAll [link] [comments]

I requested !bang Duckduckgo search for !bitcoin... It's now live! You can search anything (address, block, etc) at blockchain.info just by pasting it into the Duckduckgo search bar with !bitcoin appended.

submitted by puck2 to Bitcoin [link] [comments]

The project aim: Search for the private keys to the lost Bitcoin addresses.

Offer of the participation in a highly profitable project. (PreICO, ICO). It is valid until March 9, 2018.
The project aim: Search for the private keys to the lost Bitcoin addresses.
In short: The Bitcoin network has addresses, which have a large number of Bitcoins. But these addresses have not worked for a long time, since the owners of those addresses have lost their private key to them. The Bitcoin network is owned by the owner, who has the private key from the address.
That is, we become the owners of this address by selecting a private key and we can control the Bitcoins, which are there.
Example: The address, on which 8000 Bitcoins are located since 2009. But there are addresses, on which there are about 60 000 Bitcoins. bitcoins.https://blockchain.info/address/198aMn6ZYAczwrE5NvNTUMyJ5qkfy4g3Hi
The terms and conditions of the collecting funds are at the end of the text.
If the private key to the address is found
The first participants of this project (after finding a private key to an address that we tell only to investors) are guaranteed:
Any Investors, who have invested from 1 Bitcoin and more at the initial stage, are guaranteed a reward, for 1 invested Bitcoin the payment is 150 Bitcoins. 1: 150
The Investors, who will copy this offer and place it in their social networks with a link to this topic in the forum, are guaranteed a reward, for 1 invested Bitcoin the payment is 1: 130 (You just need to write me on mail with a link to your page, where the post is. Your post should be visible before March 9, 2018. My address is [email protected])
The percentage distribution of Bitcoins after finding of the private key to the address:
40% are distributed among the Investors 30% are distributed among the development team 10% are distributed for the further development of the project 20% are distributed for the charitable activities, namely: the installation and operation of computer classes in Russian orphanages.
Other Income, which will also be distributed among the Investors and go for the development of the project:
These revenues will be divided and paid out every three months, at a ratio of: 30% to the initial investors 30% to the team. 30% to the work and project development. 10% to the charity.
The terms and conditions for collecting funds from 3 to 100 Bitcoins until March 9, 2018:
The initial attraction of investors, with great demand, will close at a sum of 100 BTC. The subsequent receipts will be returned to the addresses, from which they arrived (minus the net commission).
The terms and conditions of investment privacy: - Return of investments and profits will be made to the address, from which they entered. - If the Investor wants to protect himself (from losing the private key of the investment address) or to obtain secret information about the address, to which the private key is selected, he must write an e-mail before payment, specifying the investment sum and the address of the Bitcoin, where the payment will come from. In this case, the authorization will go by e-mail (That is, when the profit is distributed, the e-mail address will be prompted: on which address to make the payment.)
Addresses for raising funds: (You can watch for receipts).
BITCOIN, BTC : 1C97q5yBoUdCJxEEM2Aps57yG3T1w77Yar ETHEREUM, ETH : 0xEB65EcFf6979718825127E2B0B44FCD52328387D BITCOIN CASH, BCH : 1GXXsimHqikxBniTExDmFqERm5gxm3qC2h
Also, it is possible to accept funds for PayPal, for these receipts, you should write to the mail first: [email protected]
Note: I graduated from the Physics and Mathematics Department of the University. I understand the whole complexity of the task. Most people will say that this is impossible. But as a mathematician, I say that nothing is possible. The main things are: Luck, Time, Resources. And we are sure that the reward is worth it.
Until there are first fees to 1 BTC, I do not plan to do the website.
Somebody might say that I'm a fraud. But I have the answer for them: Do you have a Facebook profile for more than 5-7 years? Is it open for everybody? Do you have a phone number, e-mail in the public domain? Is it open for everybody? Do you have a professional questionnaire on LinkedIn? Is it open for everybody? Do you show data on the network? Do you know that it is badly to write anonymously and with impunity without knowing a person?
I have it All, and I do not hide my identity. https://www.facebook.com/antsergey https://www.linkedin.com/in/sergey-guyriev-1679a436/
Also, when the Bitcoin network was flooded with a large number of unconfirmed transactions, I really helped people, who could not or did not have time to do everything by themselves! You can read my topic on a forum: https://bitcointalk.org/index.php?topic=2686039.0
Once again I repeat: Addresses for the collecting of funds: (You can watch for receipts).
BITCOIN, BTC : 1C97q5yBoUdCJxEEM2Aps57yG3T1w77Yar ETHEREUM, ETH : 0xEB65EcFf6979718825127E2B0B44FCD52328387D BITCOIN CASH, BCH : 1GXXsimHqikxBniTExDmFqERm5gxm3qC2h
Also, it is possible to accept funds for PayPal, for these receipts, you should write to the mail first: [email protected]
You can write me: on Facebook, on the email: [email protected] Telegram: @ant200709
submitted by ant200709 to altcoin [link] [comments]

08-22 18:02 - '1. Go to [link] 1. Click on the last block 1. CTRL+F and search for "115EytJ2X" 1. If none found, click on the Previous Block and repeat 1. When you find a coincidence, make sure it's the destination address and it ends with "cVD...' by /u/jarfil removed from /r/Bitcoin within 0-10min

'''
  1. Go to [link]2
  2. Click on the last block
  3. CTRL+F and search for "115EytJ2X"
  4. If none found, click on the Previous Block and repeat
  5. When you find a coincidence, make sure it's the destination address and it ends with "cVDsb4Ysvr".
We know the first 9 and the last 10 characters of the address. This is a total of 19*log(58)/log(2) = 111.3 bits. If we discount the 1st leading byte for network version, and the last 4 bytes [used for checksum]1 , we are left with 71.3 bits of the address itself. So there is less than 1 in 271.3 chance of a false positive.
But really, the checksum is based on the whole address, so we can really count it against false positives, lowering that to just a 1 in 2103.3 chance.
If we add the fact that we know the exact value of the transaction, and we can suspect that it's a recent one, there is a really high chance that that's the one.
'''
Context Link
Go1dfish undelete link
unreddit undelete link
Author: jarfil
1: en.bit**in.it/wiki*Technical_*ac****und*of_v*r*ion_1_**tcoin_**dre*s** 2: *lockc*ain.inf**hom*
Unknown links are censored to prevent spreading illicit content.
submitted by removalbot to removalbot [link] [comments]

[uncensored-r/CryptoCurrency] The project aim: Search for the private keys to the lost Bitcoin addresses.

The following post by ant200709 is being replicated because the post has been openly greylisted.
The original post can be found(in censored form) at this link:
np.reddit.com/ CryptoCurrency/comments/7ud08c
The open modlog reason it was greylisted as reported by /CryptoCurrency was: *Section 15B - Filtered for not meeting karma and age standards. *
The original post's content was as follows:
[removed]
submitted by censorship_notifier to noncensored_bitcoin [link] [comments]

[uncensored-r/Bitcoin] The project aim: Search for the private keys to the lost Bitcoin addresses.

The following post by ant200709 is being replicated because the post has been silently greylisted.
The original post can be found(in censored form) at this link:
np.reddit.com/ Bitcoin/comments/7ucok0
The original post's content was as follows:
[removed]
submitted by censorship_notifier to noncensored_bitcoin [link] [comments]

I sent some Bitcoins from my circle wallet to my friend's circle wallet. When I search blockchain for the address it sent to it shows 0 transactions, why?

Just wondering
submitted by Billistixx to Bitcoin [link] [comments]

How to safely store and remember easily your bitcoin public and private keys

Bitcoin addresses (public and private keys) are long and hard to remember. Even vanity addresses only have the first few characters have meaning.
Storing the keys electronically (like email / txt file, etc.) however exposes you to being hacked and all your coins being stolen.
Easiest thing i've found is to create a simple encryption for your private keys before storing them in electronic format.
Also, try to generate the bitcoin addresses offline (try searching for 'bitcoin address utility') and by yourself. I find that by starting with the HEX private key (which is just 64 character string using A-F and 0-9) you could essentially make up a word that is easy to remember and has meaning to you:
If you like this way of keeping your bitcoin safe and easily storing and remembering your keys then feel free to tip me at 1733rLsmW4E6bpFF3GSRRvzfsjq4ixL14d :)
submitted by rafaelnorman to Bitcoin [link] [comments]

Hi all, I created a site where you can post untrustworthy Bitcoin addresses. The goal of the project is to be able to search for a address before you sell or buy your hard earned Bitcoins. Please support us. It's free and no ads :)

Hi all, I created a site where you can post untrustworthy Bitcoin addresses. The goal of the project is to be able to search for a address before you sell or buy your hard earned Bitcoins. Please support us. It's free and no ads :) submitted by BitcoinAllBot to BitcoinAll [link] [comments]

Bitcoin, now accepted by reddit, wordpress, and... online pharmacies? (Search your spam, maybe we can find their addresses and see if anyone's falling for it)

Bitcoin, now accepted by reddit, wordpress, and... online pharmacies? (Search your spam, maybe we can find their addresses and see if anyone's falling for it) submitted by 7oby to Bitcoin [link] [comments]

Accessing the UTXO set, searching for address prefixes /r/Bitcoin

Accessing the UTXO set, searching for address prefixes /Bitcoin submitted by BitcoinAllBot to BitcoinAll [link] [comments]

Twitter hacking megathread

Notable twitter accounts have been compromised. I'll post as many links as I can below. I'll scrape and attribute from the comments over time.
Users compromised (non exhaustive): Apple Uber Cashapp Ripple A lot of Crypto Companies (Bitcoin, Coinbase, Gemini, Coindesk, Binance, etc.) A lot of Crypto personalities (Charlie Lee, CZ Binance, Justin Sun, etc.) NYSE Bill Gates Elon Musk Jeff Bezos Kanye West Obama Joe Biden Mr Beast Floyd Mayweather XXXTentacion Wiz Khalifa Warren Buffett credit to zia1997
You can watch the Bitcoin wallet here
Here is a link to a twitter search to see who all is tweeting the hacked message. Credit to ppratik96
https://twitter.com/Cian_911/status/1283508808594132993?s=20
https://twitter.com/RachelTobac/status/1283509795316658176?s=20
https://twitter.com/YarnoRitzen/status/1283515596731297798?s=20
https://twitter.com/oneunderscore__/status/1283507013755056128?s=20
https://twitter.com/jasonbaumgartne/status/1283505889299832832?s=20
https://twitter.com/elonmusk/status/1283504320848306177?s=20
https://twitter.com/oneunderscore__/status/1283503577760137219?s=20 Cian :fourleaf_clover: @jasonbaumgartne @oneunderscore_ @BrandyZadrozny Bezos hacked too, just seconds ago
CNBC: https://www.cnbc.com/2020/07/15/hackers-appear-to-target-twitter-accounts-of-elon-musk-bill-gates-others-in-digital-currency-scam.html originally posted by spoons42
Mashable: https://mashable.com/article/elon-musk-coinbase-binance-twitter-accounts-hacked-cryptocurrency-scam/
TechCrunch: https://techcrunch.com/2020/07/15/twitter-accounts-hacked-crypto-scam/?guccounter=1&guce_referrer=aHR0cHM6Ly93d3cuZ29vZ2xlLmNvbS8
Business Insider: https://www.businessinsider.com/hackers-bitcoin-crypto-cashapp-gates-ripple-coindesk-twitter-scam-links-2020-7 originally posted by youdontknwm3
The Verge: https://www.theverge.com/2020/7/15/21326200/elon-musk-bill-gates-twitter-hack-bitcoin-scam-compromised originally posted by habichuelacondulce
Co-founder of Gemini(crypto currency exchange who got hacked) says they used 2FA and a strong password.
Rumor is an employee panel got hacked which gives access to all Twitter accounts.
Statement from a spokesperson for Bill Gates. "We can confirm that this tweet was not sent by Bill Gates. This appears to be part of a larger issue that Twitter is facing. Twitter is aware and working to restore the account.” (credit to batman_00)
Appears to be a Twitter Employee that was compromised.
Official response from Twitter
submitted by X019 to technology [link] [comments]

Last Tuesday, over 300k people were made homeless in the Beirut explosion. Join us in giving directly to reputable organizations.

What happened?

On August 4, 2020, multiple explosions occurred in Beirut's port, destroying half the city and killing hundreds. Even now a large number of people are missing, thousands are injured, and over 300,000 people have lost their homes, including 80,000 children. The explosion was so big that it was heard and felt in in the nations of Cyprus and Syria next door. The devastation of the explosion, equivalent to over 1.2 kilotons of TNT, was so complete that even houses outside of Beirut were damaged. It was one of the biggest non-nuclear explosions in history, and the biggest of the last 50 years.
The explosion destroyed half of the city, including busy hospitals. Doctors in the midst of operating were forced to work by the flashlights of their cell phones. The explosion killed several foreign nationals, including French, German, Canadian, American, and Australian citizens.
This tragedy is personal to the /Showerthoughts team, specifically myself. Being Lebanese and seeing the tragedy first hand is really different than seeing it on TV. People were literally searching through the rubble for their loved ones and pets. There were people with blood all over them just sitting on the ground next to their destroyed homes, silent and in shock. It was all so surreal.
Last time /Showerthoughts came together for a charity drive, the response was inspiring and raised over 10k USD. We hope to once again come together and put the generosity and good spirit of this subreddit towards a very urgent cause.

How to Help

In collaboration with the mods of /Lebanon, the following is a list of charities and NGOs inside Lebanon which we have researched and verified

Other Ways to Help

You can raise awareness about the disaster by sharing videos of it on your social media accounts. Please note that those videos are graphic, as they show the moment the explosion happened.
You can check out some of the videos in this list.
The Beirut Explosion Megathread will have up-to-date information for people within Lebanon and for those who would like to help.
Even if you cannot donate yourself, please share these charities and promote the cause!
Huge thanks to the mods of /Lebanon and especially ThePerito for their contributions in this campaign.
submitted by MarcellusDrum to Showerthoughts [link] [comments]

Everyday info sec, hardcore info sec, and DNMs

Edit: Since first post I have updated a few sections with additional information.
I recommend reading it all even if it is very long, I might have placed some relevant info in different sections while thinking about what else needed to be added, plenty of steps remains mostly the same except when I comment directly on it. It is not necessary to do 100% security all the time, unless you absolutely need it, combining some high and some lower security ideas for a balance of security and convenience is useful.
I will base this mostly on Windows, Linux users probably know this, and I have no idea how apple machines work (tho many things in here are still relevant for other operating systems, as they are just general tips)
Disclaimer: There are certainly other steps that can make you more anonymous or safer, however I think for most people this will surfice. Any software I recommend should be independently verified for security, and examples of software are not to be taken as endorsements. I simply use examples and give recommendations when I believe it necessary, or helpful.
I will not really differentiate between anonymity and security, they are often the same thing. As such the word security can mean either more anonymous, less vulnerable, or both.
--------
Everyday Simple Info Sec:
-There could be a hidden administrator user on your PC, make sure to change its password
(Snapchat msgs, reddit dms, discord msgs, are just a few examples of msgs that are never encrypted)
-Any info even send in encrypted msgs (and obviously non encrypted) should still be kept with possible deniability, don't say "I'm gonna do MDMA", say "I'm going out with molly."
-DO NOT STORE ANY PASSWORDS ON GOOGLE, IF GOOGLE LOGIN IS AUTHENTICATED IT WILL AUTFILL ALL PASSWORDS IT HAS SAVED (same with other similar services) (This means if you are logged in to chrome and someone has access to your machine, they can auto fill passwords without entering a single password)
-use a rememberable passphrase, especially for your master key ring aka password manager A long sentence that is memorable makes an okay password (decent example,: "I met my wife at Little Ceasers for the first time on 07/09/20" better even if it's just something you know, if its impersonal, and if you can add special characters or numbers that you won't forget) (A better example for a passphrase is: "There is 0nly 0ne letter that d0esn’t appear in any U.S. state nameQ")
-Purge your internet activity frequently, there's a reason why I only have one post, and a few comments appearing in my account, but thousands of kama. Exposing information needlessly is not good.
-Never post private information publicly, and if you do, do it vaguely as possible. (Example: Not "I'm 15", say "I'm a teenager") Do not post any vital information ever, no birthdays, mother's maiden name, age, or anything you have ever seen in a security question. Never post your current activities while they are ongoing. You going on a vacation? Don't announce it to the world, taking picture there? Post them when you are home.
-Rethink how you do security questions. Many answers to security questions can be found in your internet history. One could use the first word of the security question as an answer, or a different sceme that will mean you always remember it. (Security question need to go, the amount of personal info an average person puts on the internet makes it easy to attack anything using security question)
-------_
High level crimimal information security:
The motto here is, "All the Security, All the Time" As one fuck up can end with you leaving a lick of traceability, and you could be fucked.
Pre Note: All of your software should always be up to date. Also even perfect info sec does not guarantee you are completely safe, a new zero day (exploit) can still fuck you, but good info security makes you significantly safer, by eliminating as many attacks as possible.
-Get a new device (or make a already owned device seem like you never owned it, do this only if you know how to, there's a lot of stuff that goes into that, like changing your mac adress etc) buy with cash, and your face covered, preferably far away from where you live. (Do I need to specify to not bring your phone or anything else that tracks your location to anywhere you want to go anonymously?) (Be aware that even hardware can have vulnerabilities, many cpus have known vulnerabilities, I can't list them all, do some research before buying)
-If you know how to use Tails (A linux distro designed for Info sec) use that, preferably on a USB. (Or learn how to use tails, its better, but complicated) Otherwise a clean copy of windows (make sure its not in any way associated with you) can do the job too, tho not as well. (Using a VM might give extra security, since VMs usually erase all data and RAM they were using on shutdown)
-Get a non tracking VPN, Enable the kill switch (a setting that disables all traffic that doesn't go through the VPN) (change your firewall settings to only allow the traffic from the VPN, windows guide (Change settings so only traffic from the tor application is send) Edit: (Due to complaints: do not use vpn over tor, use tor over vpn. tor over vpn has no notable downside, if the VPN logs it makes no difference, your ISP will always log anyways, and vpns remove other attack vectors and also provide backup security should tor fail. Again even if the VPN tracks you only change the people doing the tracking, but now you are further removed making it more anonymous and also with less vulnerabilities)
-rember privacy settings, cookie cleaner, and antivirus, password (There could be a hidden administrator user on your PC, make sure to change its password)
-Always use the device on a non admin account
-Ideally use this device only on networks that are not connected with you. Such as public networks (try to never use the same public networks twice, move around) (a home network should be fine now, as it should never be exposed, but more security is always better) (Its just a conveniences vs security trade)
-Never use accounts that have been exposed to lower security on higher security machines
-your browser is now TOR (or your preferred security focused browser, if you dont plan on using onion ) Make sure you get the standalone version of tor not the addon build (the standalone is safer, because there are less settings and options to tweak)
-Change your tor settings, to safest mode, enable a bridge (to my knowledge there's no difference in security between the build in bridges in tor), enable automatic updates, set duckduckgo onion as your primary browser. Set dark.fail onion page as your home page. (Or your preferred privacy search engine and onion directory)
-------_
How to use dark net markets (DNMs)
If you finished your High Security setup, we can dive right in. Otherwise go do that. This is where all that is essential.
Quick info on Tor, and onion sites. There is no search engine. It's all based of directories and addresses you are given by others. Tor will likely not be very quick, it has to pass through multiple networks to get to the destination. DNMs sometimes exit scam, an exit scam is when a market shuts down completely and takes all the money, this is a risk when using DNMs, it's not too common but happens maybe 0-4 times a year. The admins of thoese servers need to get out at some point, before they get jailed, so they exit the game, and scam everyone out of their money.
-A very useful onion directory is dark.fail it has a lot of links, for all kinds of stuff. News, email, DNMs, Psychonautwiki (harm reduction website), forums etc. (Other directories also exist)
-Pick a market, preferably one that handles secure connection server side instead of requiring you to establish the secure connection. Then create an account. Your account once created should include an entry box in your profile for a pgp key, post your PUBLIC key in there. (Verify the link is not a scam, most markets should provide a pgp signature)
-Next is currency setup. All major cryptocurrency exchangers can be used, I can recommend coin base but there could be better ones out there. Unless you find a small non U.S., exchange, they will always ask for your identity. So unless you can find a trustworthy exchange that doesn't ID, you will need to give it to them. (Side note, all major crypto exchangers report to the IRS, if the IRS asks you if you bought cryptocurrency and you bought while having IDed yourself SAY YES, DO NOT COMMIT TAX FRAUD WHEN THEY KNOW YOU DID)
-Transfer (monero you can send directly, btc you should scramble) to your wallet. There are two options a cold wallet (physical) or a software wallet. Software wallets usually dont cost anything so I recommend them, even if often less safe. Electrum is easy to use, and pretty safe. You can also do your own research and find a wallet that fits your needs.
-now you are ready to buy, only buy using escrow (it means the money is held by the market as a middle man until the product is delivered, they will also handle any issues like wrong quantity, cuts, etc), judge the reviews for a product, and if available look at the history of the vendor, until you find a product from a vendor you trust. (I recommend to buy within your country as much as possible, so it doesn't go through customs, it's very rare that something is found, but it can happen)
-now you get to buy, depending on market, you either have cryptocurrency stored in their wallets (not recommend, you will lose it in an exit scam) or you can send it every order. When you send your delivery adress (or the one you want it to go to) encrypt the adress using the sellers public key. Make sure the adress is correct.
-wait for the product, make sure to extend the escrow until the product arrives, if you can't extend it anymore dispute the order, and a moderator will step in
-test the product, use it, and leave a review. PLEASE LEAVE A REVIEW, DNMs only work because of reviews.
Edit: Didn't imagine I would write over 15000 words. Oh well, it was fun. Hope it helps, if you have any questions feel free to ask.
No idea how long this will stay up, I might purge it in 7 days, or never.
submitted by seven_N_A7 to u/seven_N_A7 [link] [comments]

How to find the private key of an imported Bitcoin address ... How to get a Bitcoin Wallet Address - FREE & in under a ... How To Find Bitcoin addresses with Balances (Android ... Coinbase - How to Find your Bitcoin wallet address - YouTube How to Trace a Bitcoin Transaction using a Bitcoin ...

Bitcoin Wallet Transaction Alerts notify you by email when a bitcoin address has activity on the blockchain View, monitor and search bitcoin ownership and wallet balance by name, bitcoin address, email address, url or keyword Check Bitcoin Address for mentions on the internet, block explorer tags, forum profile, abuses, links, OTC trader account, social network profiles. The most popular and trusted block explorer and crypto transaction search engine. The easiest and most trusted transaction search engine and block explorer. Products. Wallet Buy & Sell Crypto. Exchange ... Buying crypto like Bitcoin and Ether is as easy as verifying your identity, adding a payment and clicking "Buy". Sign up for our Wallet ... If the bitcoin address you are searching on the site has been reported by others, the site will display information, such as the number of times the address has been reported, the last report date ... Before sending your bitcoin to an address, you can check to see if that address has been reported as one being used in a scam. Bitcoin Abuse is a popular website with a public database of bitcoin addresses used by hackers and criminals. You can look up a bitcoin address, report a scam address, and monitor addresses reported by others.

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How to find the private key of an imported Bitcoin address ...

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