How to get historical balance of a Bitcoin address at a ...

Nano vs. Dogecoin - a tale of two cryptocurrency for microtransactions (& more)

So, I wanted to write here, because I think Nano community is open-minded, and can think it through - I really like it, and tho I don't have it (only tested it a few times from faucets).

As I see both of those CCs are focusing mainly on low-cost payments and microtransaction/micropayments, and "fun to use".
Even tho Dogecoin can be though as "meme" and "silly", it's actually used and adopted in many places - far more then Nano (ofc, it's also older and have easier codebase to implement - sharing it with bitcoin), but as I will outline, I think that there are a few things that Nano/Nano community can learn from them.

Dogecoin:

Now Nano:

Liquidity comparison:
Nano: https://coinpaprika.com/coin/nano-nano/#!liquidity
Doge: https://coinpaprika.com/coin/doge-dogecoin/#!liquidity
The trend is evident, if you switch to 1y or max on market depth history - Dogecoin have almost +100% growth in this period (from June 2019) and Nano 50% decline.
Looking at the data from vcdepth it's even more apparent:
https://vcdepth.io/coins/doge-doge
https://vcdepth.io/coins/nano-nano

As I say, I think Nano can learn from Doge's some, especially regarding exchange's liquidity - that's preventing a lot from happening right now. Binance is the only source, and market maker for Nano, but there should be more - through the ecosystem.
What Nano team should do in my opinion is: take part of their funds from dev premine, and use it for liquidity purposes. Cryptocurrencies can't be "run" like startups, and Nano holding shouldn't be treated as equity or cash equivalent, dumping it straight on the books. Binance is making a lot to provide all of their coins with liquid markets (their MMs are one of the best on the market), but I think team can increase liquidity easily by a factor of 2-3x, just by hiring specialistic company, that will manage it. I know coins, that have done it - and it's the main thing that helped them stay relevant. Developing protocol is important, but without liquid market - it doesn't achieve anything (because it won't be used by more people). Especially I would try to improve USDT markets - they are basically USD pairs.

PS. I'm not a developer, but I research CCs on daily basis, because it's actually my work. I think my comparison is right, because Doge have achieve much more then being only "meme" currency, and Banano did not (it's only meme currency without liquidity, acceptance, or being really used anywhere).
submitted by muf18 to nanocurrency [link] [comments]

Groestlcoin September 2019 Development Release/Update!

For a more interactive view of changes, click here
In our current world; bordering on financial chaos, with tariff wars, Brexit and hyperinflation rife, you can count on Groestlcoin to consistently produce innovation that strikes to take the power away from the few and into the many, even after a full five and a half years of solid development.
Here is what the team has already announced in the last 3 months since the last development update:

What's Being Released Today?

Groestl Nodes

What am I?

Groestl Nodes aims to map out and compare the status of the Groestlcoin mainnet and testnet networks. Even though these networks share the same protocol, there is currently no way to directly compare these coins in a single location. These statistics are essential to evaluate the relative health of both networks.

Features

Source - Website

Groestlcoin Transaction Tool

What am I?

This is a tool for creating unsigned raw Groestlcoin transactions and also to verify existing transactions by entering in the transaction hex and converting this to a human-readable format to verify that a transaction is correct before it is signed.

Features

SourceDownload

Groestlcoin AGCore

What am I?

AGCore is an Android app designed to make it easier to run a Groestlcoin Core node on always-on Android appliances such as set-top boxes, Android TVs and repurposed tablets/phones. If you are a non-technical user of Groestlcoin and want an Android app that makes it easy to run a Groestlcoin Core node by acting as a wrapper, then AG Core is the right choice for you.

What's Changed?

Source - Download

Groestlcoin Electrum

What's Changed?

Android Electrum-Specific

OSXWindowsWindows StandaloneWindows PortableLinux - Android
Server SourceServer Installer SourceClient SourceIcon SourceLocale Source

Android Wallet – Including Android Wallet Testnet

What am I?

Android Wallet is a BIP-0032 compatible hierarchial deterministic Groestlcoin Wallet, allowing you to send and receive Groestlcoin via QR codes and URI links.

V7.11.1 Changes

Groestlcoin Java Library SourceSource - DownloadTestnet Download

Groestlwallet

What am I?

Groestlwallet is designed to protect you from malware, browser security holes, even physical theft. With AES hardware encryption, app sandboxing, keychain and code signatures, groestlwallet represents a significant security advance over web and desktop wallets, and other mobile platforms.
Simplicity is groestlwallet's core design principle. Because groestlwallet is "deterministic", your balance and entire transaction history can be restored from just your recovery phrase.

iOS 0.7.3 Changes

Android v89 Changes

iOS SourceAndroid Source - Android DownloadiOS Download

Groestlcoinomi Released

What am I?

Groestlcoinomi is a lightweight thin-client Groestlcoin wallet based on a client-server protocol.

Groestlcoinomi v1.1 Desktop Changes

Groestlcoinomi Android v1.6 Changes

Groestlcoin Java Library SourceAndroid Source
Android DownloadWindows DownloadMac OS DownloadLinux Download

Groestlcoin BIP39 Tool

What's Changed?

Source - Download
submitted by Yokomoko_Saleen to groestlcoin [link] [comments]

Top 10 of The Biggest Cryptocurrency Hacks and Scams Ever

If you have been around the cryptocurrency industry long enough, you will know that one of the biggest risks faced by users is the loss of funds through hacks on cryptocurrency wallets and exchanges.
Online exchanges are prime targets for hackers and thieves on the internet. This is mainly because of the amount of funds that are kept on these platforms. For hackers that have succeeded in stealing funds from such platforms, the amounts are usually huge.
As much as individual users try to play their roles in securing their accounts by using personal passwords, PINs and codes, there is a higher layer of security that lies in the hands of the platform providers. Once this is breached, the individual security efforts become irrelevant.
Over the years, exchanges and wallets appear to have improved in terms of security as the frequency of hacks and platform breaches have reduced. What used to be a common occurrence in the industry has become a rare development, with hacks now few and far between.
Let’s take a look at the top 10 of the biggest cryptocurrency hacks and scams ever.

10. Bitcoin Gold ($18 Million)

In May 2018, the theoretical 51% attack possibility was proven in a heist that saw a breach in Bitcoin Gold which cost the protocol $18 million.
In this heist, hackers used 51% raw computing power to seize control of the network and carry out their ulterior plans effectively. Ciphertrace and other security outfits in the ecosystem believe that the algorithm weaknesses in Bitcoin Gold’s Proof of Work (PoW) transaction verification may have enabled the success of the theft.

9. Geth ($20 Million)

In June 2018, the Ethereum client Geth was hacked and ETH worth $20 million was stolen. This incidence was reported by blockchain security firm, Cyphertrace. During the hack, JSON-RPC port 8545 was exploited. This is the port that initiates ETH send transactions.
All the ETH wallets that were affected by this breach was drained by the thieves, accumulating to the quoted $20 million equivalence based on the price of ETH at that time.

8. Bancor ($23.5 Million)

In July 2018, about one month after the Geth incident, decentralized cryptocurrency exchange, Bancor was hacked and $23.5 million worth of crypto stolen. This particular event raised some eyebrows in the cryptocurrency industry, redefining the general opinion of decentralized exchanges being prone to hacking.
The process involved the exploitation of a security flaw in a wallet that was used to update some of the smart contracts on the exchange. Bancor, which was one of the most successful ICOs of 2017, raising $153 million during its token sale, was forced to shut down after the hack.

7. Coinrail ($40 Million)

Coinrail was hacked in June 2018, and $40 million was stolen from the exchange. The South Korean exchange which ranked among the top 100 exchanges by volume, suspended its services shortly after the hack.
According to sources from the exchange, the tokens that were stolen included NPXS tokens from the Pundi X project, ATC from Aston and the NPER project’s NPER token.
  1. Binance ($40.7 Million)
Binance exchange was hacked in May 2019 and 7,000 Bitcoins were stolen from the platform. The value of the Bitcoins stolen at the time was about $40.7 million.
To achieve their aim, hackers were able to steal API keys, two-factor codes and some other key information to access the wallets. According to the exchange, the incident impacted only about 2% of its total Bitcoin holdings as all other wallets are secure.
Affected wallets were promised a refund through the exchange’s Secure Asset Fund for Users (SAFU) arrangement. This is a policy that the exchange uses to prepare for rainy days. A portion of fees charged on the exchange is set aside in order to ensure that platform users do not bear the brunt during occurrences such as this.

5. Zaif ($60 Million)

Japan-based cryptocurrency exchange Zaif was hacked in September 2018 and $60 million was stolen in the process. The theft was possible after hackers gained authorised access into the exchanges hot wallets, making away with huge amounts of Bitcoin, Bitcoin Cash, and MonaCoin.
The exchange’s asset reserve could not cover the loss, therefore it reached an agreement with a Japan-listed firm called Fisco to receive a $44.5 million investment in exchange for a major share of ownership.

4. Bitfinex ($77 Million)

The Bitfinex hack of August 2016 was a popular event that rocked the entire cryptocurrency industry. The hack occurred at a time when cryptocurrencies appeared to be shifting gears in terms of awareness and development. As a matter of fact, the aftermath of the event saw the Bitcoin price drop by 20%.
After the hack, Bitfinex issued cryptographic tokens to its users that were affected by the hack, all of which the exchange announced to have bought back by April 2017.

3. BitGrail ($187 Million)

$187 million worth of Nano tokens were stolen from BitGrail in February 2018. The reported theft was announced weeks after the unauthorized transfer was initiated. This information was from evidence retrieved from the Nano blockchain explorer by skeptics.
While BitGrail recognized the concerns of it users, it however stated that it is impossible for it to refund the stolen amount.

2. Mt. Gox ($460 Million)

The Mt. Gox scandal remains one of the biggest stains on the cryptocurrency industry. In February 2014, Mt. Gox was hacked and as much as $460 million was stolen from the exchange. In the wake of this, the exchange’s CEO, Mark Karpeles issued a statement that accepted responsibility on behalf of his company.
“We had weaknesses in our system, and our bitcoins vanished. We’ve caused trouble and inconvenience to many people, and I feel deeply sorry for what has happened, “ he said.
At the time, Mt. Gox was the world’s largest Bitcoin exchange that looked impressive from the outside, but many who claimed to know about the internal workings accused the company of a messy combination of poor management, neglect, and raw inexperience.
The size of this event left a huge dent on the reputation of Bitcoin and the crypto industry at large. It took a long time before the market picked up again, and for users to regain confidence in the industry. The exchange has since gone down and ceased to exist.

1. Coincheck ($500 Million)

The biggest theft in the history of the cryptocurrency industry happened in January 2018, when Japan-based cryptocurrency exchange, Coincheck was hacked. A total of NEM tokens worth $500 million were stolen in the process.
A statement from the exchange accepted the blame and took responsibility for the breach. According to reports, rather than storing its customers’ assets in offline wallets, the assets were stored in hot wallets that were connected to the internet. Coincheck also reportedly failed to protect the wallets with standard multi-signature security protocols.
Having traced the destination of the stolen funds, NEM developers created a tracking tool that would allow exchanges to automatically reject stolen funds.

Conclusion

Hacks and massive theft of cryptocurrencies have contributed to the setback experienced by the technology. Each of the events takes a hit on the confidence of investors and willing participants who may not be sure of how the affected exchanges will handle the situation.
The industry is however learning from past experiences, as the frequency of such hacks have reduced, while in some cases, modalities are being put in place to ensure that end users do not bear the brunt of such events, just like the case of Binance.
The NEM developers’ response to the Coincheck hack has a way of rendering stolen funds unspendable, as long as other members of the community comply. However, no one knows how long this will last, and if the hackers will be able to nullify the traceability of the stolen coins yet.
The action by the developers will discourage hackers and thieves, but is yet to restore value to the end users whose funds have been stolen.
For the industry to grow as it should and become stable, security of funds need to be established. Exchanges and developers are continuously making efforts to ensure that funds and transactions within the industry remain safe at all times.
http://bitcoinadvisor.info/top-10-of-the-biggest-cryptocurrency-hacks-and-scams-eve?fbclid=IwAR1aKdbjF1HQpFQq3jH6PQptxt7mhXHJWsABPnlN5ZEjmq07ByMEYWvVezM
submitted by OliAustin101 to TopBottomCrypto [link] [comments]

Bitcoin RPC Remote Code Execution Exploit for BitcoinCore 0.9-0.15.1 CVE-2017-9230 Programming Bitcoin-qt using the RPC api (1 of 6) Bitcoin JSON-RPC Tutorial 5 - Your First Calls - YouTube Bitcoin JSON-RPC Tutorial 6 - JSON Parameters and Errors Bitcoin JSON-RPC Tutorial 4 - Command Line Interface - YouTube JSON RPC Calls with Bitcoin qt (4 of 6) Bitcoin JSON-RPC Tutorial 1 How to give your bitcoin node commands using a web server Bitcoin JSON-RPC Tutorial 7 - Wallet Notify Running a Bitcoin full node - Python interface to bitcoin ...

“OpenRPC is an ETC Labs open-source project created by its ETC Core development team that defines a standard programming language-agnostic interface description for JSON-RPC 2.0 APIs. The integration with Filecoin Lotus will offer proper documentation for developers, and make it possible to support automated type safe client generation and documentation with a minimal footprint. All while ... Friendly Bitcoin JSON-RPC API binding for Python Skip to main content Switch to mobile version Join the official 2020 Python Developers Survey : Start the survey! Vervolgens werd op 8 december 2010 versie 0.3.18 van de bitcoin core client uitgegeven. Een van de toevoegingen waren de Accounts-Based JSON-RPC commands. Dit is een interface voor smart contract functies op bitcoin. Een paar maanden later nam Satoshi afscheid van bitcoin, hij zei dat het project nu in goede handen is. The core team defines a standard programming language-agnostic interface description for JSON-RPC 2.0 APIs. The current integration with Filecoin Lotus is set to provide appropriate documentation for developers. Thus, making it possible to provide support for automated type safe client generation and also documentation with minimal footprint. The Binance API returns financial data in JSON objects or arrays. Public endpoints include market data, accounts, and user streams. Developers can use the API to create currency exchange applications and services. Binance is bitcoin and cryptocurrency exchange platform. I have created test bitcoins but how to deposit it in Peatio. currencies.yml - id: 2 key: satoshi code: btc symbol: "฿" coin: true quick_withdraw_max: 1000 ... Common operations Listing my bitcoin addresses. Listing the bitcoin addresses in your wallet is easily done via listreceivedbyaddress.It normally lists only addresses which already have received transactions, however you can list all the addresses by setting the first argument to 0, and the second one to true. Click the large blue Download Bitcoin Core button to download the Bitcoin Core installer to your Downloads folder. Optional: Verify the release signatures . If you know how to use PGP, you should also click the Verify Release Signatures link on the download page to download a signed list of SHA256 file hashes. The 0.11 and later releases are signed by Wladimir J. van der Laan’s releases key Is there any way to retrieve this data from JSON-RPC? Alternatively, is there any API or blockchain analytics service that provides this? Thanks. balance. share improve this question follow asked Jul 18 '19 at 12:27. Bill Chan Bill Chan. 21 2 2 bronze badges. add a comment 2 Answers Active Oldest Votes. 2. Account/address balance are higher level constructs that are built on Bitcoin's ... Tôi Yêu Bitcoin - Trang tin tức và chia sẻ kiến thức về Blockchain & Tiền điện tử miễn phí hàng đầu Việt Nam. Chúng tôi sẽ cập nhật tin tức hàng ngày mới nhất 24/7, các bài viết được dịch từ các trang Blog về Crypto uy tín trên thế giới.

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Bitcoin RPC Remote Code Execution Exploit for BitcoinCore 0.9-0.15.1 CVE-2017-9230

Bitcoin JSON-RPC tutorial. Handling JSON, entering parameters and receiving error messages. BTC: 1NPrfWgJfkANmd1jt88A141PjhiarT8d9U. Bitcoin JSON-RPC Tutorial 5 - Your First Calls - Duration: 10:06. m1xolyd1an 11,838 views. 10:06. Building a Blockchain in Under 15 Minutes - Programmer explains - Duration: 14:28. ... Back to the Future, one of my last days in HK, killing time refreshing my btc and py Running a Bitcoin full node - Python interface to bitcoin's JSON-RPC API... Bitcoin JSON-RPC Tutorial 3 - bitcoin.conf - Duration: 8:10. m1xolyd1an 13,667 views. 8:10. How to build a monero full (remote) node on ubuntu linux server - Duration: 14:32. ... Bitcoin JSON-RPC tutorial. How to set up and use bitcoind wallet notify feature. How to set up and use bitcoind wallet notify feature. My Book: Building Bitcoin Websites - https://www.amazon.com ... Bitcoin JSON-RPC tutorial. Getting started with the bitcoin command line interface. My Book: https://www.amazon.com/Building-Bitcoin-Websites-Beginners-Devel... In this video I revisit an old topic where several things have changed since 2015 in regards to using the JSON-RPC to communicate with your node with an apache server with PHP. https://www.amazon ... An introduction to the Bitcoin JSON-RPC tutorial series. BTC: 1NPrfWgJfkANmd1jt88A141PjhiarT8d9U Bitcoin JSON-RPC Tutorial 2 - VPS Setup - Duration: 6:28. m1xolyd1an 14,440 views. 6:28. Steve Jobs introduces iPhone in 2007 - Duration: 10:20. John Schroter Recommended for you. 10:20 . The ... Bitcoin JSON-RPC tutorial. Making your first bitcoin JSON-RPC calls in PHP. My Book: https://www.amazon.com/Building-Bitcoin-Websites-Beginners-Development/d...

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