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Questions tagged [blockchain]

10 questions
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Blockchains - How are conflicts resolved between 2 or more servers hosting the same blockchain?

Context Suppose I program a blockchain which doesn't require proof-of-work and deploy it on 3 servers A, B and C. Now suppose server A and B receive requests to insert a new block with some data in the blockchain. Both A and B modify their local…
kapv89
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Which approach can be used to verify that information has not been manipulated after it has been recorded?

I am looking for an approach to verify that some information has not been modified after a certain point in time. Let's assume a data provider records a data set at time X and provides it to a data consumer at time X+10. How could an approach look…
Braveness
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DDD and analytics - is everything a value object?

(This relates to the problem domain I have previously elaborated on here - though the exact details are not that important for this question) I'm writing an analysis application for Blockchain (DeFi) smart contracts to help me learn DDD. The source…
Sev
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Miss-understand in blockchain

I made a quick study on blockchain yesterday. There is a question in my mind, When the block is distributed and everyone has a copy, Isn't possible to have a change bit and a counter in the node and just xor whole of block bits with a copy to find…
Vahid Alimohamadi
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How to trust servers in a network where anyone can add its own

I'm building a multiplayer game where anyone can add its own server but there is only one central server that contains the database where player information, like experience and gold, are stored. To authenticate as a game server and thus have…
Greg
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Data Storage Solutions for a BlockChain

The blockchain stores basically an immutable permanent record of every transaction. This means the data is constantly increasing. Wondering if one has a model for easily roughly estimating data usage. There is a link below that goes into some depth…
Lance
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Do blockchains provide any improvement over conventional systems/frameworks when decentralization is not required?

I generally understand the blockchain framework. I have spent much time learning about how it, potentially alone, is able to provide for a decentralized system. For TRUE/ABSOLUTE decentralization, it is effectively required. This much I…
Runeaway3
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Using UML State Machine for blockchain smart contract implementation

This is a conceptual question about applying UML State Machine model for smart contracts in blockchain. I want to develop a smart contract framework in a bitcoin-like blockchain which is based on the state machine concept. It would allow to define…
xdimy
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Hyperledger Fabric: Does it really come with consensus?

As I understand, consensus is the mechanism that will ensure the ledger is kept in sync across nodes. Is that correct? Also its nothing new and wasn't something that was invented with the advent of blockchain. It is an integral part of distributed…
morpheus
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Are there benefits to having a SQL-like read only database layer over a Blockchain distributed ledger?

Distributed Blockchain datastores provide inmutability to recorded transactions and only allow to add records accepted by a consensus algorithm in sequence. You could store data on the blockchain or have references to where data might live in other…
KJP
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