Hey, I haven't forgotten about you yet. Will reply when I found out!

It looks like there is a node running [Satoshi:0.8.2.2](https://bitnodes.io/nodes/?q=Satoshi:0.8.2.2). If you find out how far you can go back I would love to know!

I am currently downloading the blockchain with the latest version (v23.0).

Will then check which versions can validate the already downloaded blockchain.

I think that should check backwards compatibility, right?

I know for sure nodes need to be updated to the 0.3.1 softfork to avoid the overflow issue.

But since it was a soft fork, wouldn't that mean the nodes before 0.3.1 would still sync? The rules got stricter, so the old nodes would still see these "new" blocks as valid.

bitcoin

Ask SN: What is the earliest bitcoin version that could still sync up?

I am currently downloading the blockchain with the latest version (v23.0).

Will then check which versions can validate the already downloaded blockchain.

I think that should check backwards compatibility, right?

> I know for sure nodes need to be updated to the 0.3.1 softfork to avoid the overflow issue.

But since it was a soft fork, wouldn't that mean the nodes before 0.3.1 would still sync? The rules got stricter, so the old nodes would still see these "new" blocks as valid.
