cryptoKTM
  • Member for 4 years, 2 months
  • Last seen more than a month ago
  • Kathmandu, Nepal
How can data be accessed/searched for in a blockchain?
Accepted answer
5 votes

You can access blockchain data like the way you access normal data in any MVC where you fetch data from database ,manipulate it in backend and display the result in front end. Incase of blockchain,...

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Notify when new transaction is arrive in a bitcoin address
2 votes

Notify when new transaction is arrive in a bitcoin address To achive this what i have implemented is: You need to have a crawler running on cronjob, which crawls each blocks(as well as mempool if ...

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Blockchain Payment receive api
2 votes

I dont know which api you are talking about , but i am this much sure that ones your transaction is minned and updated in block you cannot revert it or refund it. Blockchain data is immutable. If you ...

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Altcoin solo mining issue with Cpuminer
Accepted answer
2 votes

I had similar issue and i switched to sgminer, even cgminer is good option but personally i used sgminer with same setting as yours, and everything is working fine in my case

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Use Bitcoin RPC to send from many addresses to single address
Accepted answer
1 votes

Yes that possible: you need to know the txid and Vout index for those particular addresses when they were funded for example here i have used 3 addressees to send some BTC to single addresses ...

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How to use -txindex to enable blockchain transaction queries?
1 votes

use txindex = 1 in you bitcoin.conf file and restart daemon with -reindex flag if you are building it for the first time, it might take a while but after txindex is defined you can get data for any ...

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RPC call to bitcoin node on local machine respond back with code: 401
Accepted answer
1 votes

We need to pass Authorization method as : val jsonstring = khttp.post( url = node_url, headers = mapOf("Authorization" to computeBasicAuth("abc","pass")), data = JSONObject("{\...

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How to use Signed Hash to Send Coins in bitcoinj
1 votes

sendrawtransaction signedHex is the rpc you need to call which will submit your raw transaction to local node and network.

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Sending coins without wallet just address
1 votes

By wallet i am assuming its not on exchange. And by coin i am assuming you are talking of Bitcoin. So if your coins is stored in bitcoin core qt wallet then you can reuse the private key to sign the ...

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How long does a payment take to appear in my wallet, If not how do I reacieave it?
1 votes

If you are using node wallet then you dont need to worry about your coins as the pvt key is with you,using which you can get your coins back. Generally it wont take more than the blockformation time ...

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Any single transaction has vin and vout values. How can I tell the address of the originator and receiver?
1 votes

The addresses of Receiver is the one given in VOUT["scriptPubKey"]["addresses"] section.For the addresses of sender you need to get rawtransaction of VIN["txid"], and match the index of Vout with "n". ...

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How to get the Input Address from vin where only a txid is given (Insight-Api)
1 votes

You can code it, Python 2.7 implementation for same is: #!/usr/bin/python # -*- coding: utf-8 -*- __author__ ="cryptoKTM" import requests,json url="http://username:password@server:PORT" payload={} ...

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How to setup seed node?
1 votes

i ran some instance of node on various server and noted the ip of them 1)change file net.cpp static const char *strMainNetDNSSeed[][2] = { {"aaa.aaa.aaa.aaa","aaa.aaa.aaa.aaa"}, {"bbb.bbb.bbb....

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Problem with Bitcoin Core’s regression test mode
1 votes

Adding rpcport=18332 temporarily solve your problem. If you want to run mainnet or testnet at the same time when regtest is running, you wont be able to use them, it is because when you assign rpcport=...

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Solo mining on created altcoin: not able to create block
1 votes

You should run instance of node in atlest two diffrent machine and both of the need to get connected via blockchain.The reason behind need of atlest two diffrent machine is consensus protocol. To add ...

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What do i do with Bitcoin? How to start my Bitcoin?
0 votes

This is a bitcoin developer portal, here neither you will earn any bitcoin nor anybody will tell how how to earn it and stuff. If you want to start with bitcoin developement start with fullnode. You ...

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Regarding Private Key
0 votes

In case you both have the private key any of you can transfer btc inside that wallet so to prove them your owenership you can just sign all utxos and transfer those btc to some safe account whose ...

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Should I run crypto node for my trading platform?
0 votes

Its not necessary for you to run node but its always recommended to have one running in your server if you are planning to run a exchange platform. There are several advantages of it. Few like No ...

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Blcokchain corrupt ledger
Accepted answer
0 votes

The node will never be in sync with its peers. Synchronization process will stop as soon as it find the corruptd data

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Open source updated blockchain explorer for altcoin
0 votes

you can use insite api. You can customize the code for any altcoins. They provide UI and API for explorer services

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Permission problem installing bitcore
0 votes

run the command with following flag --unsafe-perm=true

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Lose wallet access
0 votes

The point of phrase is to generate private key using words given by you. So inorder to own those lost coin you need that phrase .OR if you have ever noted your private key then you can still get back ...

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What command can i use instead of `ListAccounts`
0 votes

listaddressgroupings Returns all addresses in the wallet and info used for coincontrol it basically returns output as a list contaning address and corresponding balance [ "...

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Are there any opensource PHP cryptocurrency exchange/marketplace
0 votes

Well its not really a exchange platform but it supports apis of more than such exchange platforms,big name include Binance, Bittrex etc . Also try it if you are looking for trading purpose Check this ...

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Why does this transaction results in only 2 unspent output (and no spent output)?
Accepted answer
0 votes

I don't understand why it seems to be just dividing a single transaction without being spent and transferred to someone else Only Unspent tx i.e UTXO could be spent, and here in your case this tx ...

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How to generate an address for bitcoin?
0 votes

If I created an address without using bitcoin core then can I get the unspents of the address? No you cant see them using command listunspent I tried using dumpprivkey and it is returning Error ...

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How to create a simple lightweight wallet (without mining) for an Altcoin
0 votes

If your altcoin is based on Scrypt then you can go for Qt wallet. There are tutorial in bitcointalk on how to create QT wallet for X-platform. Its simple and easy process and does must of what is ...

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How can coinbase transactions be created?
0 votes

Coinbase Transactoin is created after new block is minned in blockchain. Its the first transaction happen in any block and the transaction is minning reward(12.5 btc+fee) as per now. When new block ...

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How to mine your own Bitcoin fork?
-1 votes

. /abcoind setgenerate true will work

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Bitcoin API(s) - how to pair (or obtain) BOTH sender and receiver addresses with a transaction ID (hash)
-2 votes

You have to crawl the transactions,which will give you Vout addresses i.e receiver address and to know the sender address you have to Crawl Vin txid and match the Vout address with "vout"and "n" ...

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