Jump to: , Contents 1 2 3 4 5 6 7 8 9 C Run bitcoind or bitcoin-qt -server.You can control it via the command-line bitcoin-cli utility or by HTTP JSON-RPC commands.You must create a bitcoin.conf configuration file setting an rpcuser and rpcpassword; see Running Bitcoin for details.A list of RPC calls will be shown.If you are learning the API, it is a very good idea to use the test network (run bitcoind -testnet and bitcoin-cli -testnet).Running Bitcoin with the -server argument (or running bitcoind) tells it to function as a HTTP JSON-RPC server, but Basic access authentication must be used when communicating with it, and, for security, by default, the server only accepts connections from other processes on the same machine.If your HTTP or JSON library requires you to specify which 'realm' is authenticated, use 'jsonrpc'.Bitcoin supports SSL (https) JSON-RPC connections beginning with version 0.3.14.See the rpcssl wiki page for setup instructions and a list of all bitcoin.conf configuration options.

Allowing arbitrary machines to access the JSON-RPC port (using the rpcallowip configuration option) is dangerous and strongly discouraged-- access should be strictly limited to trusted machines.To access the server you should find a suitable library for your language.See the proper money handling page for notes on avoiding rounding errors when handling bitcoin values.python-jsonrpc is the official JSON-RPC implementation for Python.It automatically generates Python methods for RPC calls.However, due to its design for supporting old versions of Python, it is also rather inefficient.jgarzik has forked it as Python-BitcoinRPC and optimized it for current versions.Generally, this version is recommended.While BitcoinRPC lacks a few obscure features from jsonrpc, software using only the ServiceProxy class can be written the same to work with either version the user might choose to install: The latest version of python-bitcoinrpc has a new syntax.By default the client will use the configuration in $HOME/.bitcoin/bitcoin.conf or you can instead specify a URI like this: Here is a usage example: The JSON-RPC PHP library also makes it very easy to connect to Bitcoin.

For example: Note: The jsonRPCClient library uses fopen() and will throw an exception saying "Unable to connect" if it receives a 404 or 500 error from bitcoind.erlang bitcoin exchangeThis prevents you from being able to see error messages generated by bitcoind (as they are sent with status 404 or 500).eclipsetrader bitcoinThe EasyBitcoin-PHP library is similar in function to JSON-RPC PHP but does not have this issue.bitcoin mine etmekThe easiest way to tell Java to use HTTP Basic authentication is to set a default Authenticator: Once that is done, any JSON-RPC library for Java (or ordinary URL POSTs) may be used to communicate with the Bitcoin server.bitcoin flex

Instead of writing your own implementation, consider using one of the existing wrappers like BitcoindClient4J, btcd-cli4j or Bitcoin-JSON-RPC-Client instead.bitcoin flexThe JSON::RPC package from CPAN can be used to communicate with Bitcoin.bitcoin gewinnYou must set the client's credentials; for example: The btcrpcclient package can be used to communicate with Bitcoin.You must provide credentials to match the client you are communicating with.The communication with the RPC service can be achieved using the standard http request/response objects.A library for serializing and deserializing Json will make your life a lot easier: /json ) is a high performance JSON package for .NET.It is also available via NuGet from the package manager console ( Install-Package Newtonsoft.Json ).The following example uses Json.NET: There is also a wrapper for Json.NET called Bitnet (https://sourceforge.net/projects/bitnet) implementing Bitcoin API in more convenient way: /GeorgeKimionis/BitcoinLib) which is also available via NuGet from the package manager console (Install-Package BitcoinLib).

Querying the daemon with BitcoinLib is as simple as: You can also send commands and see results using cURL or some other command-line HTTP-fetching utility; for example: You will be prompted for your rpcpassword, and then will see something like: clj-btc is a Clojure wrapper for the bitcoin API.The C API for processing JSON is Jansson.C applications like libblkmaker use cURL for making the calls and Jansson for interpreting the JSON that cURL fetches.For example basic usage (which can be easily modified for Bitcoin RPC), see the Jansson example github_commits.c and the associated tutorial.The following does with libcurl what the does:This output can be parsed with Jansson, the Jansson tutorial linked to above.QJsonRpc is a Qt/C++ implementation of the JSON-RPC protocol.It integrates nicely with Qt, leveraging Qt's meta object system in order to provide services over the JSON-RPC protocol.QJsonRpc is licensed under the LGPLv2.1.Join our Telegram Channel!Get Bitcoin News stories in Telegram × Dismiss

Why does Bitcoin change value?Why is the price so volatile?The value of a bitcoin is tied purely to the laws of supply and demand.In other words, the price is determined only by what the market is willing to pay.If more people want to buy bitcoins, then the price will increase.If more people want to sell, the price will decrease.Bitcoin’s value can be volatile when compared to more established currencies and commodities.This can be attributed to its relatively small market size, and it means that a smaller amount of money can move the Bitcoin price more significantly.This discrepancy will decrease naturally over time as the currency matures and the market size increases.For merchants wishing to accept bitcoin now, Coinbase provides a way to avoid volatility altogether by instantly exchanging bitcoin payments to your local currency.Still can't find what you're looking for?A new iOS app allows users to help save mankind from a “reptilian alien invasion” and earn bitcoins in the process.

Tigara Games released its first title, Uranus Attacks!, for iOS users on 1st March.Built using the Coinbase API, users are rewarded with bitcoin dispensed in Coinbase wallets, about $0.05 according to developers, for encouraging others to enroll in the apocalyptic resistance effort.The brainchild of developer Amer Qureshi, the release is the product of six months of development during which he sought to tie bitcoin into an iOS gaming experience."I don’t know what the latest stats are, but there are only 2 million people with bitcoin out there, but think of how many people have games.With all of these people from the gaming side starting to get bitcoin for free, knowledge of bitcoin could grow beyond what it is today and that’s good for everyone."Bitcoin is also featured prominently in the design of the game, as users accumulate and spend virtual in-game bitcoins on items and to advance to new levels.Due to iOS restrictions, however, these in-game bitcoins have no real-world value.Qureshi indicated that Tiagara is optimistic his team won’t face similar hurdles when it tries to launch the app on Android.

is available for purchase for $2.99 to those with iPhone 5 models or newer.Purchase proceeds help fund development and to pay for the game’s referral program.When users open the app, they’re greeted with a series of missions, 13 in total, each of which has an arcade-style scoreboard.Users materialize in outer space as a cartoon astronaut beset by space rocks and colorful aliens.Users can tap to teleport to a new location on the board and double tap to release a blast radius of weaponry to dispose of the evil aliens.Should enough be killed in a single blast, cartoon bitcoins will appear to be scooped up by players.Points are then redeemable for new levels and special weaponry, though a default bomb is always available for free.Users can check their point levels via a 'Coin Bank' and purchase 1,000 in-game points for an additional $0.99.Quershi explained that the idea for Uranus Attacks!was born out of his desire to help spread the bitcoin ecosystem to new users while increasing his own skills as an iOS developer.