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In Ethereum 2.0, a shard block for being finalized needs to be linked into a finalized beacon block.

Under which conditions a "shard block" cross-linked into a "finalized beacon block"? Having 2/3 of validators' signatures in its committee is enough? Or other additional conditions is required as well?

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  • I would carefully say once the beacon block with the reference is finalized but it might be too early to answer as the phase 1 spec is still a moving target. – Afr Jun 10 '20 at 10:28

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