Non-repudiation with MultiChain

Question

Hi,

my goal is to be sure that a transaction is really added to a chain properly. I'm developing an implementation where a process should proceed only if a value is publishes so that everyone can read the value if wanted. When started to think the problem more, it looks more difficult one. Can the MultiChain deliver a trustable proof that a transaction (value) is added to it properly? By properly I mean that e.g. over 50 percent of peers has the transaction in their chains.

Answer 1

In terms of the consensus algorithm, what's important is not how many peers have the transaction in their chains, but that the validators responsible for building the chain will not reverse the transaction. The certainty of a transaction rises with the number of blocks that are built on top of it. If your chain's mining-diversity is above 0.5, and a transaction is confirmed under (mining-diversity * number-of-permitted-miners * 2) blocks, then for all practical purposes you can consider the transaction to be irreversible. The only thing that could undermine this is a coordinated attack on the peer-to-peer network connections between the nodes – a level of attack that would cause any consensus-based system to fail in one way or another.