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Update v-guide: Shard head root

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Hsiao-Wei Wang 2020-07-22 23:39:18 +08:00
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specs/phase1/validator.md
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@ -31,7 +31,7 @@
- [`FullAttestation`](#fullattestation) - [`FullAttestation`](#fullattestation)
- [Timing](#timing) - [Timing](#timing)
- [Attestation data](#attestation-data) - [Attestation data](#attestation-data)
- [Head shard root](#head-shard-root) - [Shard head root](#shard-head-root)
- [Shard transition](#shard-transition) - [Shard transition](#shard-transition)
- [Construct attestation](#construct-attestation) - [Construct attestation](#construct-attestation)
- [Attestation Aggregation](#attestation-aggregation) - [Attestation Aggregation](#attestation-aggregation)
@ -267,9 +267,9 @@ A validator should create and broadcast the `attestation` to the associated atte
*Note*: We assume that the fork choice only follows branches with valid `offset_slots` with respect to the most recent beacon state shard transition for the queried shard. *Note*: We assume that the fork choice only follows branches with valid `offset_slots` with respect to the most recent beacon state shard transition for the queried shard.
##### Head shard root ##### Shard head root
Set `attestation_data.shard_head_root = hash_tree_root(shard_head_block)`. If `attestation_data.slot == GENESIS_SLOT`, set `attestation_data.shard_head_root = Root()`. Otherwise, set `attestation_data.shard_head_root = hash_tree_root(shard_head_block)`.
##### Shard transition ##### Shard transition