Unanswered questions in Blockchain

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solidity struct is not generated in java wrapper code

struct itemDetails{ uint256 itemId; string itemName; uint256 itemVal; } mapping(address => itemDetails[]) ...READ MORE

Oct 27, 2023 in Blockchain by sanap
edited Mar 5 • 293 views
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please can you send me a valid genesis.json file in my email adress : victordievi@gmail.com

when i run geth --datadir ./data init ...READ MORE

May 27, 2023 in Blockchain by victor
edited Mar 5 • 282 views
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How can I code my own cryptocurrency mining software?

I've been researching for months. But I ...READ MORE

Feb 17, 2023 in Blockchain by Turkuaz
edited Mar 5 • 278 views
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i am having an error called identifier not found or not unique.

i have called a function for owner ...READ MORE

Dec 19, 2022 in Blockchain by virat
edited Mar 4 • 294 views
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can anyone recommend me blockchain course? or any other learning material that is beginner friendly

can anyone recommend me blockchain course? or ...READ MORE

Nov 16, 2022 in Blockchain by Akash

edited Mar 4 • 362 views
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How to get output list in solidity funct,i have a struct of Drug,and a table named drugs of Drug:i need to get a list/table of drugs having same name

I try this but it doesn't work! ...READ MORE

Sep 25, 2022 in Blockchain by IMEN
edited Mar 4 • 235 views
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Mapping structure before copying values

Below is the code ``` pragma solidity ^0.4.18; contract Courses ...READ MORE

Aug 22, 2022 in Blockchain by Brijesh
 • 120 points
edited Mar 4 • 159 views
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0 answers

Error while creating channel in hyperledger-fabric

$ ./network.sh createChannel Using docker and docker-compose Creating channel ...READ MORE

Aug 1, 2022 in Blockchain by Shaik
edited Mar 4 • 208 views
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Testing Ask a question

This category houses questions pertaining to various ...READ MORE

Aug 1, 2022 in Blockchain by anonymous
 • 300 points • 957 views
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Do I need to learn programming languages like python and c to learn block chain examples in ethereum go ?

When I was learning blockchain from edureka ...READ MORE

Jun 25, 2022 in Blockchain by anonymous
edited Mar 4 • 143 views
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how does bitcoin prevent double-spending?

can someone help me create a Pseudocode ...READ MORE

Apr 5, 2022 in Blockchain by Soham
 • 9,730 points
edited Mar 4 • 158 views
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0 answers

BITCOIN payments, OP_RETURN parameter

I want to automate BITCOIN payments and ...READ MORE

Apr 4, 2022 in Blockchain by Rahul
 • 9,690 points • 630 views
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Can third party send an ERC20 token transaction to the Ethereum blockchain?

I want to create a smart contract ...READ MORE

Apr 4, 2022 in Blockchain by Rahul
 • 9,690 points • 1,142 views
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How do I do experiments of blockchain consensus algorithms

I'm writing a paper on the blockchain ...READ MORE

Apr 4, 2022 in Blockchain by Rahul
 • 9,690 points • 798 views
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Does the crypto wallet "Exodus" reveal your IP Address?

I've read that "SPV Wallets," also called ...READ MORE

Apr 4, 2022 in Blockchain by Rahul
 • 9,690 points • 1,071 views
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Is Blockchain a single linked list?

When seen as a datatype, is Blockchain ...READ MORE

Apr 4, 2022 in Blockchain by Rahul
 • 9,690 points • 697 views
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Azure Blockchain , Cannot read property 'uri' of undefined

I am starting with Azure Blockchain. When ...READ MORE

Apr 4, 2022 in Blockchain by Rahul
 • 9,690 points • 612 views
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What is the difference between Amazon managed Blockchain and Amazon Blockchain Templates?

I am a beginner in Blockchain and ...READ MORE

Apr 4, 2022 in Blockchain by Rahul
 • 9,690 points • 876 views
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Node.js blockchain bitcoin api

So I want to use this: (taken ...READ MORE

Apr 4, 2022 in Blockchain by Rahul
 • 9,690 points • 744 views
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Are all Blockchain array implementations incorrect?

I found many Blockchain implementations on the ...READ MORE

Apr 4, 2022 in Blockchain by Rahul
 • 9,690 points • 599 views
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Blockchain platform in C

I am trying to understand available blockchain ...READ MORE

Apr 4, 2022 in Blockchain by Rahul
 • 9,690 points • 634 views
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Is Blockchain a distributed database?

I have noticed that most of the ...READ MORE

Apr 4, 2022 in Blockchain by Soham
 • 9,730 points • 784 views
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Ontology Blockchain development

I'm analyzing the Ontology blockchain. The core of ...READ MORE

Apr 4, 2022 in Blockchain by Soham
 • 9,730 points • 534 views
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How to protect private blockchain with public blockchain?

Private blockchain has the risk of 51% ...READ MORE

Apr 4, 2022 in Blockchain by Soham
 • 9,730 points • 652 views
0 votes
0 answers

What is the difference between blockchain performance and blockchain scalability?

I really don´t get the difference between ...READ MORE

Apr 4, 2022 in Blockchain by Soham
 • 9,730 points • 610 views
0 votes
0 answers

Query LOCAL Bitcoin blockchain with C# .NET

I am trying to check the balance ...READ MORE

Apr 4, 2022 in Blockchain by Soham
 • 9,730 points
edited Mar 4 • 170 views
0 votes
0 answers

Why do we not use Istanbul Byzantine Fault Tolerance (IBFT) in Public Blockchains?

As I said in the title, why ...READ MORE

Mar 10, 2022 in Blockchain by Soham
 • 9,730 points
edited Mar 4 • 158 views
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What is an optimal size of a consortium in consortium blockchain?

In order to save energy on consensus ...READ MORE

Mar 10, 2022 in Blockchain by Soham
 • 9,730 points
edited Mar 4 • 162 views
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How is data entry in private and consortium blockchains trusted?

Suppose we have a consortium blockchain like ...READ MORE

Mar 10, 2022 in Blockchain by Soham
 • 9,730 points
edited Mar 4 • 127 views
0 votes
0 answers

Hyperledger Fabric 1.4 Private data collection

Hyperledger fabric provides inbuilt support storing offchain ...READ MORE

Mar 10, 2022 in Blockchain by Soham
 • 9,730 points
edited Mar 4 • 165 views
0 votes
0 answers

how to sign bitcoin psbt with ledger?

I'm trying to sign a PSBT transaction ...READ MORE

Mar 9, 2022 in Blockchain by Soham
 • 9,730 points • 2,241 views
+1 vote
0 answers

How to generate bitcoin address from XPUB

How to generate bitcoin addresses from XPUB ...READ MORE

Mar 9, 2022 in Blockchain by Soham
 • 9,730 points • 2,023 views
+1 vote
0 answers

How to check a Bitcoin wallet balance from first generated address (m/44'/0'/0'/0/0)

Is there a way to check a ...READ MORE

Mar 9, 2022 in Blockchain by Soham
 • 9,730 points • 2,376 views
0 votes
0 answers

How to Query Transaction on Hyperledger Sawtooth?

I want to perform CRUD operations in ...READ MORE

Mar 8, 2022 in Blockchain by Soham
 • 9,730 points • 585 views
0 votes
0 answers

What is the physical location of Blockchain?

 I am new to this technology and ...READ MORE

Mar 8, 2022 in Blockchain by Soham
 • 9,730 points • 695 views
0 votes
0 answers

Does timestamp also change with nonce to calculate block hash in blockchain? How hash is calculated?

Do we need to update date timestamp ...READ MORE

Mar 8, 2022 in Blockchain by Soham
 • 9,730 points • 804 views
0 votes
0 answers

Store Images on/off blockchain? which is better?

I have been using hyperledger fabric and ...READ MORE

Mar 4, 2022 in Blockchain by Soham
 • 9,730 points • 589 views
0 votes
0 answers

Private ethereum blockchain mining on a Raspberry Pi - is it possible?

I am trying to write a private ...READ MORE

Mar 4, 2022 in Blockchain by Soham
 • 9,730 points • 965 views
0 votes
0 answers

How to delete an image saved in IPFS blockchain?

I am working on a blockchain based ...READ MORE

Mar 4, 2022 in Blockchain by Soham
 • 9,730 points • 881 views
0 votes
0 answers

How would calculate the exchange rate of Bitcoin/GBP?

I've got an API that returns the ...READ MORE

Mar 4, 2022 in Blockchain by Soham
 • 9,730 points
edited Mar 4 • 145 views
+1 vote
0 answers

How to check a Bitcoin wallet balance from first generated address (m/44'/0'/0'/0/0)

Is there a way to check a ...READ MORE

Mar 4, 2022 in Blockchain by Soham
 • 9,730 points • 2,559 views
0 votes
0 answers

Blake2b-512 with ED25519 in PHP with NanoSalt library (Nano Crypto)

I have been trying to generate a Nano ...READ MORE

Mar 4, 2022 in Blockchain by Soham
 • 9,730 points • 879 views
0 votes
0 answers

Trying To Open Bitcoin Miner On Terminal

Trying to open a file, but the ...READ MORE

Mar 4, 2022 in Blockchain by Soham
 • 9,730 points • 578 views
0 votes
0 answers

Get bitcoin historical data

I want to do my own bitcoin ...READ MORE

Mar 3, 2022 in Blockchain by Soham
 • 9,730 points
edited Mar 4 • 142 views
0 votes
0 answers

Blockchain and HyperLedger Fabric difference

While I was trying to understand blockchain ...READ MORE

Mar 3, 2022 in Blockchain by Soham
 • 9,730 points • 583 views
0 votes
0 answers

Blockchain and HyperLedger Fabric difference

While I was trying to understand blockchain ...READ MORE

Mar 3, 2022 in Blockchain by Soham
 • 9,730 points
edited Mar 4 • 136 views
0 votes
0 answers

Can a blockchain be Centralised? Will it be called as Blockchain if it is centralised?

I was reading a lot of articles ...READ MORE

Mar 3, 2022 in Blockchain by Soham
 • 9,730 points • 729 views
0 votes
0 answers

hd wallet bip44 in js - how to create an address for a chain other than bitcoin?

I have a small script basically taken ...READ MORE

Mar 2, 2022 in Blockchain by Aditya
 • 7,680 points • 1,305 views
0 votes
0 answers

API - Convert Bitcoin Amount into USD with my Api

After apiv2.bitcoinaverage.com is not free anymore I ...READ MORE

Mar 2, 2022 in Blockchain by Aditya
 • 7,680 points • 1,226 views
0 votes
0 answers

Scrypt algorithm output doesn't match up as expected

I am trying to get my head ...READ MORE

Mar 1, 2022 in Blockchain by Soham
 • 9,730 points • 599 views

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