Quote from: Khaos77 on February 15, 2019, 06:56:42 PM

Non-mining nodes relay blocks according to their consensus rules,
they are nothing more than a personal copy of the blockchain / transaction receipts.

Non-mining nodes can only relay block data, Validation & Creation of blocks only occurs on Mining nodes.
Want proof , turn off your non-mining nodes, any effect of the network will not even be noticed.

Network will continue on , normally because the mining nodes do all of the work.

mining nodes:
validate
collate(block create)
relay

non-mining nodes:
validate
relay

take coinbase.com. get them to turn off their non-mining nodes and you will soon realise that MINING NODES cant spend their blockrewards on coinbase.com because coinbase.com cant see or trust that a miner has value to spend.
non mining nodes do validate.
..
how ever there are some software that just relay. such as matt corrallos 'fibre' and also some lite nodes designed specifically to just relay out data unchecked independantly.
....
also.
if one mining node made block X with an error
if one mining node made block Y with without an error

with coinbase.com's NON-mining node. would validate both attempts(if both received near same time and Y has not yet been built on to be defined as a clear winner) and when when validated deem block Y the winner. and as such Block Y can happily be placed as the next block coinbase keeps. thus allowing the miner of Y to spend the block reward. where as mining node X will get forgot/rejected
....
also
because coinbase.com has a chain that includes block Y.. and other peers see that coinbase and N other peers also have Y then the consensus is that the chain containing block Y is more acceptable to everyone compared to that the one node trying endlessly to push block X. eventually the one node endlessly pushing X would get banned from being a connected node if it made too many push requests

...
also
whn the MINING nodes want to make the next block. they see many peers have chosen Y. and thus its best they build a block on Y to avoid orphan event

.. also
non-mining nodes do check with their peers what best chaintip, height and blockhash to follow and wouldnt really bother even trying to look at a chain containing X if Y has more acceptance amongst peers and also Y is ahead with other blocks now above it and the network building on further.