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Change spelling of 'PoVBlocks' to be consistent with other polkadot docs (#373)

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Sebastian Thiel
2021-03-19 20:14:22 +08:00
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parent 9df91c783c
commit 4ad027079f
1 changed files with 6 additions and 6 deletions
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cumulus/docs/overview.md
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@@ -23,12 +23,12 @@ When compiling a runtime that uses Cumulus, a WASM binary is generated that cont
of the Parachain runtime plus the `validate_block` functionality. This binary is required to
register a Parachain on the relay chain.
When the Parachain validator calls the `validate_block` function, it passes the PovBlock (See [Block
When the Parachain validator calls the `validate_block` function, it passes the PoVBlock (See [Block
building](#block-building) for more information) and the parent header of the Parachain that is
stored on the relay chain. From the PovBlock witness data, Cumulus reconstructs the partial trie.
stored on the relay chain. From the PoVBlock witness data, Cumulus reconstructs the partial trie.
This partial trie is used as storage while executing the block. Cumulus also redirects all storage
related host functions to use the witness data storage. After the setup is done, Cumulus calls
`execute_block` with the transactions and the header stored in the PovBlock. On success, the new
`execute_block` with the transactions and the header stored in the PoVBlock. On success, the new
Parachain header is returned as part of the `validate_block` result.
## Node
@@ -60,14 +60,14 @@ consensus and the block production logic.
## Block Building
Polkadot requires that a Parachain block is transmitted in a fixed format. These blocks sent by a
Parachain to the Parachain validators are called proof-of-validity blocks (PovBlock). Such a
PovBlock contains the header and the transactions of the Parachain as opaque blobs (`Vec<u8>`). They
Parachain to the Parachain validators are called proof-of-validity blocks (PoVBlock). Such a
PoVBlock contains the header and the transactions of the Parachain as opaque blobs (`Vec<u8>`). They
are opaque, because Polkadot can not and should not support all kinds of possible Parachain block
formats. Besides the header and the transactions, it also contains the witness data and the outgoing
messages.
A Parachain validator needs to validate a given PoVBlock, but without requiring the full state of
the Parachain. To still make it possible to validate the Parachain block, the PovBlock contains the
the Parachain. To still make it possible to validate the Parachain block, the PoVBlock contains the
witness data. The witness data is a proof that is collected while building the block. The proof will
contain all trie nodes that are read during the block production. Cumulus uses the witness data to
reconstruct a partial trie and uses this a storage when executing the block.