PSA: The last Core version supports non-segwit clients even after activation (you can mine non-segwit blocks)


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From https://lists.linuxfoundation.org/pipermail/bitcoin-core-dev/2017-April/000039.html

In previous versions, getblocktemplate required segwit support from downstream clients/miners once the feature activated on the network. In this version, it now supports non-segwit clients even after activation, by removing all segwit transactions from the returned block template. This allows non-segwit miners to continue functioning correctly even after segwit has activated.

Due to the limitations in previous versions, getblocktemplate also recommended non-segwit clients to not signal for the segwit version-bit. Since this is no longer an issue, getblocktemplate now always recommends signalling segwit for all miners. This is safe because ability to enforce the rule is the only required criteria for safe activation, not actually producing segwit-enabled blocks.

submitted by /u/Grozzi
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