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Merge pull request #1867 from ethereum/p2p-genesis-root 

clarify genesis finalized checkpoint root in p2p spec
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Diederik Loerakker 2020-06-02 22:13:02 +02:00 committed by GitHub
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specs/phase0/p2p-interface.md
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@ -468,9 +468,9 @@ The fields are, as seen by the client at the time of sending the message:
- `fork_digest`: The node's `ForkDigest` (`compute_fork_digest(current_fork_version, genesis_validators_root)`) where - `fork_digest`: The node's `ForkDigest` (`compute_fork_digest(current_fork_version, genesis_validators_root)`) where
- `current_fork_version` is the fork version at the node's current epoch defined by the wall-clock time (not necessarily the epoch to which the node is sync) - `current_fork_version` is the fork version at the node's current epoch defined by the wall-clock time (not necessarily the epoch to which the node is sync)
- `genesis_validators_root` is the static `Root` found in `state.genesis_validators_root` - `genesis_validators_root` is the static `Root` found in `state.genesis_validators_root`
- `finalized_root`: `state.finalized_checkpoint.root` for the state corresponding to the head block. - `finalized_root`: `state.finalized_checkpoint.root` for the state corresponding to the head block (Note this defaults to `Root(b'\x00' * 32)` for the genesis finalized checkpoint).
- `finalized_epoch`: `state.finalized_checkpoint.epoch` for the state corresponding to the head block. - `finalized_epoch`: `state.finalized_checkpoint.epoch` for the state corresponding to the head block.
- `head_root`: The hash_tree_root root of the current head block. - `head_root`: The `hash_tree_root` root of the current head block (`BeaconBlock`).
- `head_slot`: The slot of the block corresponding to the `head_root`. - `head_slot`: The slot of the block corresponding to the `head_root`.
The dialing client MUST send a `Status` request upon connection. The dialing client MUST send a `Status` request upon connection.