kandi X-RAY | BlockCypher Summary
kandi X-RAY | BlockCypher Summary
BlockCypher
Support
Quality
Security
License
Reuse
Top functions reviewed by kandi - BETA
Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of BlockCypher
BlockCypher Key Features
BlockCypher Examples and Code Snippets
Community Discussions
Trending Discussions on BlockCypher
QUESTION
I'm able to get address balances using their address balance endpoint:
https://www.blockcypher.com/dev/bitcoin/?shell#address-balance-endpoint.
But the API does not present any method to return Wallet Balances (since a Wallet consists of multiple addresses).
Since multiple addresses constitute a Wallet, I tried using a loop on the addresses and adding up the total to get the Wallet balance, but the issue with that approach is that it is too resource intensive and uses up the Blockcypher API limits quickly, especially when the addresses become really large (as I'm generating new address for each transaction on my application).
I've tried storing address information (including balance) on my db and using a webhook to listen on incoming transactions and update the address balance accordingly, but the approach is really messy and it doesn't even update the correct balance! This is how I retrieve the balance from the webhook total field:
ANSWER
Answered 2022-Apr-01 at 08:57With blockcypher API you can concatenate addresses using ;, like this:
https://api.blockcypher.com/v1/btc/main/addrs/1DEP8i3QJCsomS4BSMY2RpU1upv62aGvhD;1JcX75oraJEmzXXHpDjRctw3BX6qDmFM8e
More info: https://www.blockcypher.com/dev/bitcoin/#batching
QUESTION
Trying to access the value associated with the date_added key in a dictionary returned from coinmarketcap which I have named data_dict
The value which I am trying to retrieve is 2013-04-28T00:00:00.000Z
data_dict = {'status': {'timestamp': '2021-10-07T11:14:06.481Z', 'error_code': 0, 'error_message': None, 'elapsed': 10, 'credit_count': 1, 'notice': None}, 'data': {'1': {'id': 1, 'name': 'Bitcoin', 'symbol': 'BTC', 'category': 'coin', 'description': 'Bitcoin (BTC) is a cryptocurrency . Users are able to generate BTC through the process of mining. Bitcoin has a current supply of 18,837,087. The last known price of Bitcoin is 54,121.57993093 USD and is up 5.16 over the last 24 hours. It is currently trading on 8524 active market(s) with $46,641,776,977.64 traded over the last 24 hours. More information can be found at https://bitcoin.org/.', 'slug': 'bitcoin', 'logo': 'https://s2.coinmarketcap.com/static/img/coins/64x64/1.png', 'subreddit': 'bitcoin', 'notice': '', 'tags': ['mineable', 'pow', 'sha-256', 'store-of-value', 'state-channels', 'coinbase-ventures-portfolio', 'three-arrows-capital-portfolio', 'polychain-capital-portfolio', 'binance-labs-portfolio', 'arrington-xrp-capital', 'blockchain-capital-portfolio', 'boostvc-portfolio', 'cms-holdings-portfolio', 'dcg-portfolio', 'dragonfly-capital-portfolio', 'electric-capital-portfolio', 'fabric-ventures-portfolio', 'framework-ventures', 'galaxy-digital-portfolio', 'huobi-capital', 'alameda-research-portfolio', 'a16z-portfolio', '1confirmation-portfolio', 'winklevoss-capital', 'usv-portfolio', 'placeholder-ventures-portfolio', 'pantera-capital-portfolio', 'multicoin-capital-portfolio', 'paradigm-xzy-screener'], 'tag-names': ['Mineable', 'PoW', 'SHA-256', 'Store of Value', 'State channels', 'Coinbase Ventures Portfolio', 'Three Arrows Capital Portfolio', 'Polychain Capital Portfolio', 'Binance Labs Portfolio', 'Arrington XRP capital', 'Blockchain Capital Portfolio', 'BoostVC Portfolio', 'CMS Holdings Portfolio', 'DCG Portfolio', 'DragonFly Capital Portfolio', 'Electric Capital Portfolio', 'Fabric Ventures Portfolio', 'Framework Ventures', 'Galaxy Digital Portfolio', 'Huobi Capital', 'Alameda Research Portfolio', 'A16Z Portfolio', '1Confirmation Portfolio', 'Winklevoss Capital', 'USV Portfolio', 'Placeholder Ventures Portfolio', 'Pantera Capital Portfolio', 'Multicoin Capital Portfolio', 'Paradigm XZY Screener'], 'tag-groups': ['OTHER', 'CONSENSUS_ALGORITHM', 'CONSENSUS_ALGORITHM', 'PROPERTY', 'PROPERTY', 'PROPERTY', 'PROPERTY', 'PROPERTY', 'PROPERTY', 'PROPERTY', 'PROPERTY', 'PROPERTY', 'PROPERTY', 'PROPERTY', 'PROPERTY', 'PROPERTY', 'PROPERTY', 'PROPERTY', 'PROPERTY', 'PROPERTY', 'PROPERTY', 'PROPERTY', 'PROPERTY', 'PROPERTY', 'PROPERTY', 'PROPERTY', 'PROPERTY', 'PROPERTY', 'PROPERTY'], 'urls': {'website': ['https://bitcoin.org/'], 'twitter': [], 'message_board': ['https://bitcointalk.org'], 'chat': [], 'explorer': ['https://blockchain.coinmarketcap.com/chain/bitcoin', 'https://blockchain.info/', 'https://live.blockcypher.com/btc/', 'https://blockchair.com/bitcoin', 'https://explorer.viabtc.com/btc'], 'reddit': ['https://reddit.com/r/bitcoin'], 'technical_doc': ['https://bitcoin.org/bitcoin.pdf'], 'source_code': ['https://github.com/bitcoin/'], 'announcement': []}, 'platform': None, 'date_added': '2013-04-28T00:00:00.000Z', 'twitter_username': '', 'is_hidden': 0}}}
I have tried the following without any success....
extracted_date = data_dict['data']['date_added']
In fact, my attempt returns the following error....
KeyError: 'date_added'
I do not understand why this error is occuring
...ANSWER
Answered 2021-Oct-07 at 11:31extracted_date = data_dict['data']['1']['date_added']
QUESTION
I am trying to send a get request to an api and get a response. My code is working fine but there is a problem with body of response, I am getting numbers before and after body of the response. Here is my code:
...ANSWER
Answered 2021-Jun-29 at 18:19I am missing something but what?
You are not taking into account that these responses are using the chunked transfer encoding format (via the Transfer-Encoding: chunked header) to send the body data in chunks instead of a single byte stream, as you are expecting. See RFC 2616 Section 3.6.1 and RFC 7230 Section 4.1 for more details on the chunked format.
What are they?
The numbers you are referring to are chunk size indicators.
In the 1st response shown, there is a single chunk of data whose byte size is
4a0(0x4A0 hex, 1184 decimal), followed by a terminating chunk whose byte size is0.In the 2nd response shown, there is a single chunk of data whose byte size is
bcd(0xBCD hex, 3021 decimal), followed by a terminating chunk whose byte size is0.
The 0-length chunk ends the body data (there is no Content-Length or Connection: close header present to end the responses otherwise).
You won't be able to use a simple recv() loop to read chunked bodies. You have to detect the chunked header, and if present then read and parse each chunk individually. Read a chunk size, skip up to the following CRLF, read the specified number of bytes, skip up to the following CRLF. Repeat until a 0-length chunk is reached. Then read a set of trailing HTTP headers that may follow the chunks, overwriting any headers that you read before the body.
See the pseudo code I present in this answer and this answer.
QUESTION
I'm new to Blockchain and I want to understand how to use JS to open a Websocket, the code is from Blockcypher.com docs https://www.blockcypher.com/dev/dash/?javascript#using-websockets
...ANSWER
Answered 2021-Jun-19 at 11:08The problem is not in your code but with the server not responding as expected.
It could be a server issue or you may need to be pre approved to access the resource (assuming they are whitelisting IP addresses which I doubt).
Also, check out the rest of the code, it has a placeholder for a token that you may need to connect (the error you see now is way before the token is requested).
You can always change the server name to one of many test servers out there like wss://echo.websocket.org and see the error changing from "Can't establish connection" to something related to the rest of the code.
QUESTION
I have am trying to do a get request to api with blockcypher.com. In the docs they simply append the api token to the URL with ?token= or if it's part of multiple parameters &token=. What's the proper protocol for putting this in the headers to make sure that the token isn't sent in the URL for security reasons?
I already tried to do this formula
...ANSWER
Answered 2021-Apr-04 at 02:17If the API you're calling doesn't support the Authorization header, there isn't anything you can do. From looking at BlockCypher's docs, they only appear to support passing the token as a URL parameter. The Authorization header is very standard, so not supporting it is odd.
This isn't as big of a security risk as you might think, as long as you are only doing server-to-server communication (not a browser or mobile app). When you use HTTPS, the request URL is encrypted (see Is an HTTPS query string secure?).
QUESTION
I was building my own contract here: https://www.blockcypher.com/dev/ethereum/#create-contract-endpoint
ENGINE.PHP
...ANSWER
Answered 2021-Mar-11 at 09:41Error compiling Solidity source code: fork/exec /usr/bin/solc: no such file or directory
This is an error on the side of Blockcypher. You might want to report it to them.
solc is a "solidity compiler" and what it does - it takes the text source code and config (such as which version of Solidity you are using, whether you want to to run an optimizer, ...) as an input, and returns the bytecode, ABI and metadata as an output.
So when you call the Blockchypher endpoint, their system tries to open the binary /usr/bin/solc. But the file is misplaced on their system, and the endpoint returns this error.
QUESTION
i'm ne to Django and APIs and i'm struggling with this for days. Here's my views.py file :
...ANSWER
Answered 2021-Feb-25 at 16:40You can access the attributes using . in templates. Have a look at the accessing method calls documentation. You can try accessing using t.height.
QUESTION
I'm new to crypto but I'm attempting to implement a storefront to process bitcoin sending / receiving. In my first test I transferred some BTC from my coinbase account to my personally hosted wallet. The result was what appears to be a combined transaction with several unknown (for all intents and purposes anyway, they are coinbase's (temporary?) wallets) public keys that distribute out to the various output wallets, including the one I was using in my test.
So I received the bitcoin, but I cannot verify that it came from me as coinbase's system obfuscates that detail. The wallet / key they display on the website seems to only be for receiving crypto.
The only solution that has come to mind is to create a different wallet for every transaction in order to verify the amount received is as expected, and thus removes any nonsense with having to trust user input. Is this the standard methodology? Are there better ways to handle this? I figure the cost of then transferring from those small wallets would be a rather large loss.
For this project I'm using NBitcoin + Blockcypher in a .NET Framework environment.
Thank you for any insight or suggestions in advance. This has been an interesting field to dive into.
...ANSWER
Answered 2021-Feb-13 at 16:59Multiple inputs
Each transaction can have multiple inputs, which are the addresses you are seeing. A transaction with multiple inputs counts as a single transaction. So the miner's fee will be the same as a transaction with a single input.
A user spending the transaction will need to have the private key of each input, so it's safe to assume that all the inputs belong to the same user.
Outputs
A transaction can have 1 or 2 outputs. One for the receiving party, and one for any spare change back to the paying party.
Automatically validating a transaction
All automatic payment validation systems (that I know of), use "single-use addresses". That is, they create an address that is only used once. You can then link the address to a certain user, and check if the funds were received on that address without having to know anything about the input addresses.
Note that most wallets also generate a lot of addresses for users. So, keeping a record of users and their bitcoin addresses is generally not recommended.
As generating new bitcoin addresses is quite easy, I would suggest you set up a system that generates a new address for each incoming payment. If you share this address only with the paying party you know for certain it can only be them that made the payment.
Good luck!
QUESTION
I am trying to read a config in a json file using the viper library
...ANSWER
Answered 2020-May-24 at 07:25Use map[string]string or alerts only in coreconfig struct as your json stucture.
The json tag is used by the json package, not by viper. Viper use github.com/mitchellh/mapstructure package for unmarshaling, so use mapstructure tag.
QUESTION
I'm trying to sign a transaction skeleton Blockcypher returns, in order to send it along, following https://www.blockcypher.com/dev/bitcoin/#creating-transactions.
For this example, I'll use the completely-unsafe 'raw raw raw raw raw raw raw raw raw raw raw raw' mnemonic, which using dart bip32 package creates a BIP32 with private key 0x05a2716a8eb37eb2aaa72594573165349498aa6ca20c71346fb15d82c0cbbf7c and address mpQfiFFq7SHvzS9ebxMRGVohwHTRJJf9ra for BTC testnet.
Blockcypher Tx Skeleton tosign is 1cbbb4d229dcafe6dc3363daab8de99d6d38b043ce62b7129a8236e40053383e.
Using Blockcypher signer tool:
...ANSWER
Answered 2020-May-17 at 00:12The dart bip32 package doesn't seem to encode the signature in DER format, but rather in a simple (r, s) encoding. However DER is required for Bitcoin. For more information see:
https://bitcoin.stackexchange.com/questions/92680/what-are-the-der-signature-and-sec-format
You can either add the DER extra bytes yourself according to your r and s or check if there's a DER encoding in the dart bip32 library.
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install BlockCypher
Support
Reuse Trending Solutions
Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items
Find more librariesStay Updated
Subscribe to our newsletter for trending solutions and developer bootcamps
Share this Page
