Merge pull request #318 from ethereum/vbuterin-patch-16
Clarify block hash -> block root
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commit
357167d8c2
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@ -140,6 +140,7 @@ Unless otherwise indicated, code appearing in `this style` is to be interpreted
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* **Attester** - a [validator](#dfn-validator) that is part of a committee that needs to sign off on a beacon chain block while simultaneously creating a link (crosslink) to a recent shard block on a particular shard chain.
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* **Attester** - a [validator](#dfn-validator) that is part of a committee that needs to sign off on a beacon chain block while simultaneously creating a link (crosslink) to a recent shard block on a particular shard chain.
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* **Beacon chain** - the central PoS chain that is the base of the sharding system.
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* **Beacon chain** - the central PoS chain that is the base of the sharding system.
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* **Shard chain** - one of the chains on which user transactions take place and account data is stored.
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* **Shard chain** - one of the chains on which user transactions take place and account data is stored.
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* **Block root** - a 32-byte Merkle root of a beacon chain block or shard chain block. Previously called "block hash".
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* **Crosslink** - a set of signatures from a committee attesting to a block in a shard chain, which can be included into the beacon chain. Crosslinks are the main means by which the beacon chain "learns about" the updated state of shard chains.
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* **Crosslink** - a set of signatures from a committee attesting to a block in a shard chain, which can be included into the beacon chain. Crosslinks are the main means by which the beacon chain "learns about" the updated state of shard chains.
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* **Slot** - a period of `SLOT_DURATION` seconds, during which one proposer has the ability to create a beacon chain block and some attesters have the ability to make attestations
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* **Slot** - a period of `SLOT_DURATION` seconds, during which one proposer has the ability to create a beacon chain block and some attesters have the ability to make attestations
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* **Epoch** - an aligned span of slots during which all [validators](#dfn-validator) get exactly one chance to make an attestation
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* **Epoch** - an aligned span of slots during which all [validators](#dfn-validator) get exactly one chance to make an attestation
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@ -508,7 +509,7 @@ Unless otherwise indicated, code appearing in `this style` is to be interpreted
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{
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{
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# Slot number
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# Slot number
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'slot': 'uint64',
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'slot': 'uint64',
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# Shard block hash
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# Shard block root
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'shard_block_root': 'hash32',
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'shard_block_root': 'hash32',
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}
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}
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```
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```
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@ -894,7 +895,7 @@ def get_shard_committees_at_slot(state: BeaconState,
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def get_block_root(state: BeaconState,
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def get_block_root(state: BeaconState,
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slot: int) -> Hash32:
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slot: int) -> Hash32:
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"""
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"""
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Returns the block hash at a recent ``slot``.
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Returns the block root at a recent ``slot``.
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"""
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"""
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earliest_slot_in_array = state.slot - len(state.latest_block_roots)
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earliest_slot_in_array = state.slot - len(state.latest_block_roots)
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assert earliest_slot_in_array <= slot < state.slot
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assert earliest_slot_in_array <= slot < state.slot
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