contract download chain replication

[ixje]

see point 2. of #209 (comment)

[devhawk]

@ixje Isn't this a duplicate of #225 ?

[ixje]

Not necessarily. There is a lot of overlap for OnlineNode's but not for offline or batch ones. The difference might be small enough to merge the 2 issues though. If we keep them separate then this issue should be resolved before #225 .

[devhawk]

I'm going to close this issue as a dupe of #255.

[ixje]

This is not a duplicate though.
iirc #225 is about downloading from a source network into a multi-node private network, whereas this issue is about how a client connected to the private network that had a contract downloaded on its chain will get the new state information because there is no deploy transaction. Solving this issue could however automatically solve #225

Either way, I think this issue has more context than #225 and should therefore take precedence over #225. just my 2 cents