Our API makes it easy to integrate bitcoin, litecoin and ethereum into both new and existing applications.Coinbase’s APIs enable a variety of capabilities; from simply gathering read-only data, to building something that’s never been done before.We offer a variety of client libraries and mobile SDKs.Buy Widget Allow your customers to buy bitcoin directly into your app by embedding the Coinbase Buy Widget.Wallet API Create and manage bitcoin, litecoin and ethereum wallets, send payments, and enable buying/selling of bitcoin, litecoin and ethereum in your app.Coinbase Connect (OAuth2) Connect your app with over 4 million Coinbase bitcoin, litecoin and ethereum wallets.Notifications Get alerted in real time about wallet events.Merchant Checkouts Accept bitcoin instantly with easy to use checkout pages, embeddable widgets, plugins, and an API for custom integrations.GDAX API Trade programmatically on the leading U.S.If you can’t find the answer to your question or need help, please explore and contact us through our dev support channels: .

we are offline sorry …:) Play for Free Bitcoin and Cryptocurrency apps FreeBits*New*:Discover the new and best FREE BITCOIN and Cryptocurrency app.Claim your Bitcoin,Litecoin,Dogecoin,Peercoin,Ethereum,Dashcoin,Primecoin & Monero rewards now! Powered by Happy GamesThis tutorial shows how to create a 2 of 2 multisig wallet.A 2 of 2 multisig consists of 2 separate wallets (usually on seperate machines and potentially controlled by seperate people) that have to be used in conjunction in order to access the funds.Both wallets have the same set of Addresses.Create a pair of 2-of-2 wallets Each cosigner needs to do this: In the menu select File->New, then select “Multi-signature wallet”.On the next screen, select 2 of 2.After generating a seed (keep it safely!)you will need to provide the master public key of the other wallet.Put the master public key of the other wallet into the lower box.Of course when you create the other wallet, you put the master public key of this one.

You will need to do this in parallel for the two wallets.Note that you can press cancel during this step, and reopen the file later.Receiving Check that both wallets generate the same set of Addresses.You can now send to these Addresses (note they start with a “3”) with any wallet that can send to P2SH Addresses.Spending To spend coins from a 2-of-2 wallet, two cosigners need to sign a transaction collaboratively.To accomplish this, create a transaction using one of the wallets (by filling out the form on the “send” tab) After signing, a window is shown with the transaction details.The transaction has to be sent to the second wallet.For this you have multiple options: you can transfer the file on a usb stick you can use QR codes you can use a remote server, with the CosignerPool plugin.Transfer a file You can save the partially signed transaction to a file (using the “save” button), transfer that to the machine where the second wallet is running (via usb stick, for example) and load it there (using Tools -> Load transaction -> from file) Use QR-Code There’s also a button showing a qr-code icon.

Clicking that will display a qr-code containing the transaction that can be scanned into the second wallet (Tools -> Load Transaction -> From QR Code) Use the Cosigner Pool Plugin For this to work the Plugin “Cosigner Pool” needs to be enabled (Tools -> Plugins) with both wallets.bitcoin mining outletOnce the plugin is enabled, you will see a button labeled “Send to cosigner”.bitcoin tata investmentClicking it sends the partially signed transaction to a central server.bitcoin farming wikiNote that the transaction is encrypted with your cosigner’s master public key.reddit bitcoin brasilWhen the cosigner wallet is started, it will get a notification that a partially signed transaction is available: The transaction is encrypted with the cosigner’s master public key; the password is needed to decrypt it.bitcoin boring report

With all of the above methods, you can now add the seconds signature the the transaction (using the “sign” button).litecoin iphone walletIt will then be broadcast to the network.Exception printing is disabled by default for security reasons.Error log record number: 719184045164Ledger Nano S Cryptocurrency hardware wallet Ledger Nano S is a Bitcoin, Ethereum and Altcoins hardware wallet, based on robust safety features for storing cryptographic assets and securing digital payments.It connects to any computer (USB) and embeds a secure OLED display to double-check and confirm each transaction with a single tap on its side buttons.Latest generation hardware When you own cryptocurrencies, you need to protect your confidential data and the access to your funds.With Ledger Nano S, secrets like private keys are never exposed: sensitive operations are isolated inside your hardware wallet within a state-of-the-art Secure Element, locked by a PIN code.

Transactions can’t get tampered with, they are physically verified on the embedded screen with a simple press on a button.Pay and authenticate Ledger Nano S includes Bitcoin, Litecoin, Ethereum and Ethereum Classic companion apps, and other blockchain-based cryptocurrencies.You can send and receive payments, check your accounts and manage multiple addresses for each currency from the same device.Nano S also supports the FIDO® Universal Second Factor standard that simplifies the authentication process on compatible online services such as GMail, Dashlane, Dropbox or GitHub.AMD’s Radeon R9 290X graphics card is an excellent, top-of-the-line piece of PC hardware, and is easily one of the best graphics cards you can get your hands on today.In fact, it’s so popular that it’s reportedly sold out here in the US.Why it’s sold out is another matter though.And no, it’s not because hordes of video editors and PC gamers are swiping them off shelves to build multi-GPU systems.While that is likely happening too, that doesn’t appear to be where most of the demand for this card is these days.