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Transaction signature algorithm

As I know, standard ECDSA digital signature algorithm returns two values (according to this article or Wikipedia), but transaction push services or APIs, like this one, require one string as a ...
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1answer
17 views

Blockchain.info's blockcount API call giving error, alternatives?

This URL today: https://blockchain.info/q/getblockcount Was giving the error "Too many requests". Any alternative out there to get the blockcount via an API? Thanks
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11 views

Bitcoin Widgets & API

can anyone recommend the best api/widget for getting Bitcoin, Crypto Currency Charts, Currency Convert and tickers?
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1answer
19 views

What's the POST endpoint to broadcast a transaction in copay's server?

AFAIU, copay's server implementation is bitcore-wallet-service. From its README, I can deduce that a multi-sig wallet will use the /v1/txproposals/ endpoint to create a new transaction proposal that ...
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1answer
53 views

Trouble with Kraken exchange [closed]

This is kind of messy. Originally, I forgot my password. Requested reset but had forgotten that I'd enabled 2FA and didn't know 2FA key. 2FA was disabled by support, allowing me to reset password ...
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31 views

Inconsistent Results with Blockchain Data API

I'm using the Blockchain API library (Python, v1) from blockchain.info available on GitHub. The blockexplorer.py module provides functions for obtaining blocks from the blockchain, specifically ...
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1answer
29 views

Primary security risks of Bitcoin QT API use

When using an API to operate Bitcoin QT remotely, which security concerns should I be most worried about?
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75 views

Blockchain Api v2

I'm new to this api. In the new blockchain.info api, there is a local service running and we can create wallets. But how to use this api to check balance and make payments using existing blockchain....
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1answer
66 views

Why do websites such as satoshimines and bustabit generate new addresses every time?

Why a single address for each user not enough? Can't they just verify the incoming transactions? If I want to mimic this practice, how can I generate unlimited addresses, from which transactions can ...
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1answer
42 views

Streaming API for confirmed transactions?

Is there an API that makes streams transactions as they're confirmed? Everything I can find seems to just be putting out unconfirmed transactions in realtime, rather than waiting for confirmation. To ...
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50 views

Always the same deposit address for a user?

I'm wondering if it is possible to at creation of a user account also save a deposit address(blockchain.info receive payments API) which the user will always use when he/she wants to deposit coins. ...
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72 views

How to correctly get real-time trading data from exchanges such as Kraken?

I'm trying to gather real-time trading data from several exchanges. Some exchanges provide websockets, which works great. Others, such as Kraken, don't. For Kraken, in particular, I'm calling: https:/...
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21 views

Is there any site and/or service that provides historical trade data for most exchanges?

Looking, for example, at Kraken's API - seems like there is no way to get the whole historical trades of a trading pair. Is there any service that provides such information in an API-friendly format? ...
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What hardware and bandwidth requirements would a server need to fulfill to run Bitcore?

What's the cost of running Bitcore on AWS or DigitalOcean? I know I'd need about 128gb of hardrive space, but I'm not sure how much the typical bandwidth costs would be, and how much RAM or cores I ...
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1answer
150 views

Blockchain.info send may transactions API v2

I'm currently using v2 of Blockchain.info's API and am wanting to utilise "Send Many Transaction" and am having some issues. I have 1 wallet with many addresses, I am trying to send 2 transactions ...
2
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1answer
105 views

How are Fees Charged at Kraken Exchange?

How are fees charged when I initiate a trade? Are they subtracted from my order's volume? Are the fees applied separately from my account's balance? Can I set the currency I want my fees to be ...
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35 views

Why is Blockchain.info API failing?

I am trying to use blockchain.info API to get a block. I do in python: from blockchain import util from blockchain import blockexplorer block = blockexplorer.get_block('...
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3answers
573 views

How to check Bitcoin wallet balance without any API

I am building an application and that will involve large set of bitcoin wallets and need to keep on checking for balance. I don't want to use any third party APIs as they all have hourly/secondly ...
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2answers
103 views

Building a web app to collect Bitcoin payments. How should I monitor transactions on payment?

I'm looking to create a web app similar to coffee.foldapp.com where they load up a bitcoin address and once you pay it will automatically show the Digital code product. They seem to be using 0-...
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24 views

Wondering if this wallet feature exists

I've been wondering is it possible for a wallet to have some sort of rest API I could call in order to send funds to another bitcoin wallet of my choice. for example wwww.myWallet.Com/uniqueToken/...
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66 views

Blockchain Receive API - custom Parameters

I am trying to get variables back from the callback URL, but I can't figure out how to add custom parameters correctly. This is how I have them written right now: $newAddy = json_decode(...
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1answer
30 views

Bitfinex get credits and convert timestamp to JS Date

I'm fetching my active credits in BFX and trying to discover when I'll have my funding back. This is a response example: /v1/credits [{ amount: "294.4316181", currency: "USD", id: ...
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1answer
154 views

Are there Ethereum API wrappers? [closed]

I'm looking into developing some Go software on Ethereum and I'm wondering - are there any API wrappers around for Ethereum (something like BTCSuite's BTCRPCClient is for Bitcoin)? I know there is a ...
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1answer
108 views

Are there any web wallets around with open APIs?

For a long while, blockchain.info offered a web wallet with a convenient web API, but it recently turned out that it now requires an installation to function. I'm wondering - are there any other ...
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37 views

Library ZMQ to Java does not work

I am trying to connect to a bitcoin node using the ZMQ library for Java. the problem is that when I try to receive a response the code remains frozen. Returns nothing. This is my code: public class ...
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1answer
52 views

Finding the timing of blocks, afterwards?

I understand that the timestamps on blocks are not fully accurate. Given only that information, it's efectively impossible to do retrospective analyses of timing of blocks. (For example, this; http://...
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0answers
163 views

Blockchain.info Receive Payment callback problem

I am setting up a website to accept bitcoins using blockchain.info API, it's all set, code is ok, tested and working, I receive payments and everything but blockchain.info just won't call the callback ...
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1answer
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International Bitcoin Payment Platform [duplicate]

I need to integrate bitcoins payments in my web application. I was about to use Stripe platform for accepting bitcoins (works exactly the same than for accepting credit cards) but I realized they ...
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1answer
111 views

What causes the wallet functions to be disabled?

I have run bitcoind as a server on one host. On a second host, I have configured bitcoin-cli to interact with bitcoind. However, all wallet commands are now disabled with this new configuration. ...
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1answer
46 views

How out of block chain transactions work, and is there any API for that?

i wonder how out of block chain transactions work, because till i know it happens but "is not recommended" (it is what i read on the internet), i want to manage some micro transactions but as it is ...
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66 views

Bitcoind has too slow API call performance on large wallets

Bitcoind (bitcoin-0.11.2, linux32) has too slow performance when the wallet size gets bigger, i will post here some average timing behaviors. The wallet size is 410MB. A getbalance call requires 1.45 ...
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1answer
112 views

Get “Value at time of transaction” from blockchain.info api

I need to get the value displayed in usd on the transaction details page of blockchain.info, if you hover the btc sent you can see a "value at time of transaction". How I can get this data ...
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12 views

Write code on blockchain.info api(PHP) [duplicate]

I want to write contract(Application) on block-chain.info using PHP and JSON...How would i start?And how would i place that contract on block-chain bitcoin network?
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129 views

blockchain.info php api

Hello I am new to this block chain environment,but i am currently working on project which requires blockchain.info api(php),so could anybody please tell me how to use this api in order to send data ...
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1answer
94 views

Problems checking BTC current balance using blockchain.info's API, am I correct here?

I have a script that uses the Blockchain API to check the current balance on all my accounts one by one. When I reach a certain balance I sweep to a master account. Am I using the correct code here ...
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174 views

Example Code for connecting to Bifinex.com websocket API?

Does anyone have example code for utilizing the Bitfinex Websocket API? Looking for something written in Python.
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1answer
221 views

Can I use curl to call getInfo from a the Bitcoin server?

I am wondering if its possible to use curl to getinfo from the bitcoin server thanks. <?php // init the resource $ch = curl_init(); // set a single option... $username = 'usernamefromconfig'; $...
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305 views

Xapo api tutorials

I am building a website and wish to have a deposit bitcoin widget on website. I want to have xapo api to generate new address and get callbacks from it. Can someone please help me figuring out the ...
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1answer
77 views

How do deposit bitcoin works?

I visit so many faucets everyday and some gaming faucets like wonderlandcoin,playbitcoin,faucetbirds,robotcoingame and many more.I also visit some betting websites like satoshibet,777dice and many ...
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1answer
36 views

Blockexplorer.com API POST error

I'm trying to write Python code which utilises the (Insight) Blockexplorer.com API , particularly the POST functions. I'm testing using the iOS REST app, Restler (see screenshot). The call I'm trying ...
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2answers
274 views

Callbacks using blockchain.info's API

I'm trying to accept bitcoin payments on my website using blockchain.info's API. However, I'm confused with their callback. I've read through their callback, but how would I know if the transaction ...
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1answer
124 views

List of blockchain explorer APIs?

I'm gathering a list of Bitcoin / Blockchain APIs. I mean web (REST) APIs that allow you to do basic blockchain queries through http(s) API calls, such as: getting the balance on an address, getting a ...
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1answer
178 views

How to get a single value in BTC-e API

how will i be able to get a single value out of BTC-e API. This is the current API: https://btc-e.com/api/3/ticker/btc_usd As you can see, it shows lots of information. What can i do so that i will ...
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2answers
540 views

How to access Latest Transactions using the Blockchain.info api?

I'm new in bitcoin, I just want to return json scrutucture from latest transactions from time to time. I couldn't figure by searching their reference, I think it requires a level of knowledge in ...
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704 views

Transaction rejected by our node. Blockchain receive API

I use the Blockchain.info receive API with great succes. Yesterday I created a new address: 1MMVp6fzZ6QrVYXg9iRSJb5PsM8crq5iMZ It received 1.5 BTC and was transferred to my BTC address (unfonfirmed). ...
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2answers
69 views

Calculating a sum of received bitcoins

I have a list of bitcoin addresses provided by a user and I am trying to find out a sum deposited to these addresses. I am using blockexplorer.com API to obtain transactions. This is a typical API ...
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107 views

bitcoin api blockchain - where is the money?

I have made several transactions via blockchain API, and I'm getting the callback everything works normally. But today when I see my balance is zero and it has no transaction history. Transactions ...
3
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1answer
176 views

How to get value of incoming transactions from Blockchain.info API

I'm looking at the blockchain.info API and I'm having a difficult time finding the value of incoming transactions. That and the number of incoming transactions are the only things I'm interested in. ...
3
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1answer
263 views

Best Python API for sending Bitcoins from a Multi-Sig wallet

I want to create a multi sig wallet which I can broadcast transaction from through an API. I would like a wallet with a permanent public address not one that changes every time I run the code. I was ...
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About blockchain.info Api Usage

When I got the code I use a url such as abc.com and I hope to know if I use my api in def.com will it work? If so what is the url meaning? Every time it will generate wallet and if I use this API to ...