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Update EIP-7685: change requests hash to flat hash #8854

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merged 2 commits into from
Sep 26, 2024
Merged

Update EIP-7685: change requests hash to flat hash #8854

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b102f1a
EIP-7685: change requests hash to flat hash
fjl Sep 4, 2024
5c0cbec
7685: fix typo
lightclient Sep 26, 2024
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19 changes: 6 additions & 13 deletions EIPS/eip-7685.md
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Original file line number Diff line number Diff line change
Expand Up @@ -64,18 +64,11 @@ block_body_rlp = rlp([

#### Block Header

Extend the header with a new 32 byte value `requests_root`.

Let `requests_root` be the root of a Merkle-Patricia trie keyed by the index in
the list of `requests`. This is equivalent to how the transaction trie root is
computed.

The `requests_root` field value is therefore computed as follows:
Extend the header with a new 32 byte value `requests_hash`:

```python
def compute_trie_root_from_indexed_data(data):
trie = Trie.from([(i, obj) for i, obj in enumerate(data)])
return trie.root
def compute_requests_hash(list):
return keccak256(rlp.encode([rlp.encode(req) for req in list]))

block.header.requests_root = compute_trie_root_from_indexed_data(block.body.requests)
```
Expand All @@ -89,9 +82,9 @@ EL request.

### Opaque byte array rather than an RLP array

By having the bytes of `request_data` array from second byte on be opaque bytes, rather than an RLP (or other
encoding) list, we can support different encoding formats for the transaction
payload in the future such as SSZ, LEB128, or a fixed width format.
By having the bytes of `request_data` array from second byte on be opaque bytes, rather
than an RLP (or other encoding) list, we can support different encoding formats for the
request payload in the future such as SSZ, LEB128, or a fixed width format.

### Request source and validity

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