EIP-4844 blob sidecars are a concept that only exists in the mempool.
After inclusion of a transaction into an execution block, only the
versioned hash within the transaction remains. To improve type safety,
replace the `Transaction.networkPayload` member with a wrapper type
`PooledTransaction` that is used in contexts where blob sidecars exist.
1. Fix Assertion error when receipt is not a List nor has a single
byte value. Receiving such garbage data would cause a crash.
2. Fix decoding of Receipt list by adding the missing Blob
encapsulation
Also added tests for these scenarios.
Instead of patching BlockHeader or BlockBody codec
each time it get additional optional fields,
this PR make the rlp codec automatically handle
optional fields. Thus rlp codec overloading of
EthBlock, BlockHeader, and BlockBody can be removed.
Using exception in rlp.append turn out creates more problem than it solve.
`blockHash` operation is literally everywhere in nimbus-eth1, nimbus-eth2, and fluffy-code.
The compiler begins to complain about unlisted exception.
Rlp bytes coming from network and test vectors already verified by the decoder.
So, any invalid optional fields of blockheader that come into rlp.append means
programming error. Assertion will be more apropiate in this situation and less problematic.
including:
- fix rlp.append of BlockHeader
- add tests for rlp.readRecordType of BlockBody
- add tests for rlp.append of BlockHeader
- add tests for EthBlock roundtrip
Adds `Withdrawal` type according to EIP-4895, and extends `BlockHeader`
accordingly. Also adds RLP encoding support for `Withdrawal` to enable
building `BlockHeader` (used by Nimbus-CL in empty block prod fallback).
* Move NetworkId type to common eth_types
NetworkId is after all a common type and this way it avoid an
application that requires it to also import all devp2p related
network types.
RLP related calls are moved to eth_types_rlp, this means that p2p
protocols that send NetworkId over the wire need to import this
too. Or just common in general.
* Remove # in front of multiline comment end bracket
These seem to be interpreted wrongly by the GitHub code browser.
* tighter nimcrypto imports
* install openssl on macos for Nim devel
* add getTotalDifficulty base method to AbtractChainDB
Co-authored-by: Jacek Sieka <jacek@status.im>
`eth_types` is being imported from many projects and ends up causing
long build times due to its extensive import lists - this PR starts
cleaning some of that up by moving the chain DB and RLP to their own
modules.
this PR also moves `keccakHash` to its own module and uses it in many
places.
* Fix stability issues
why:
Handling malformed messages typically raises `RangeError` exceptions
when de-serialising RLP, or decoding message data. This is an
(incomplete) attempt to weed out some out it driven by real live
tests.
remark:
Employing the new `snap` protocol there might be different views on what
the messages really contain (currently specs are more a hint.)
* Update RLP exception handling
* Undo effect-less patch
why:
problem occurred somewhere above the try/catch handler
* Using `checkedEnumAssign()` for RLP enum
Currently only setting `--styleCheck:hint` as there are some
dependency fixes required and the compiler seems to trip over the
findnode MessageKind, findnode Message field and the findNode
proc. Also over protocol.Protocol usage.
1. Generalises the special cases for serialising RLP `seq[Transaction]`.
Previously it only used the special case inside `BlockBody` and `EthBlock`.
Now it uses it for all `seq[Transaction]` regardless of what objects they
are parts of, or no object at all. `openArray[Transaction]` is also
included, as this was found to be necessary to match in some places.
2. Bug fix parsing `Transaction`: Always read the first byte to get the
transaction type instead of parsing an RLP `int`. This way invalid or
adversarial input gives a correct error (i.e. invalid type code).
When it was read with `rlp.read(int)`, those inputs gave many crazy
messages (e.g. "too large to fit in memory"). In the specification it's a
byte. (Technically the input is not RLP and we shouldn't be using the RLP
parser anyway to parse standalone transaction objects).
3. Bug fix parsing `Transaction`: If a typed transaction is detected in
`seq[Transaction]`, the previous code removed the RLP (blob) wrapper, then
passed the contents to `read(Transaction)`. That meant a blob-wrapped
legacy transaction would be accepted. This is incorrect. The new code
passes the contents to the typed transaction decoder, which correctly
rejects a wrapped legacy transaction as having invalid type.
Change 1 has a large, practical effect on `eth/65` syncing with peers.
Serialisation of `eth` message types `Transactions` and `PooledTransactions`
have been broken since the introduction of typed transactions (EIP-2718), as
used in Berlin/London forks. (The special case for `seq[Transaction]` inside
`BlockBody` only fixed message type `BlockBodies`.)
Due to this, whenever a peer sent us a `Transactions` message, we had an RLP
decoding error processing it, and disconnected the peer thinking it was the
peer's error.
These messages are sent often by good peers, so whenever we connected to a
really good peer, we'd end up disconnecting from it within a few tens of
seconds due to this.
This didn't get noticed before updating to `eth/65`, because with old protocols
we tend to only connect to old peers, which may be out of date themselves and
have no typed transactions. Also, we didn't really investigate occasional
disconnects before, we assumed they're just part of P2P life.
The root cause is the RLP serialisation of individual `Transaction` is meant to
be subtly different from arrays/sequences of `Transaction` objects in network
messages. RFC-2976 covers this but it's quite subtle:
- Individual transactions are encoded and stored as either `RLP([fields..])`
for legacy transactions, or `Type || RLP([fields..])`. Both of these
encodings are byte sequences. The part after `Type` doesn't have to be
RLP in theory, but all types so far use RLP. EIP-2718 covers this.
- In arrays (sequences), transactions are encoded as either `RLP([fields..])`
for legacy transactions, or `RLP(Type || RLP([fields..]))` for all typed
transactions to date. Spot the extra `RLP(..)` blob encoding, to make it
valid RLP inside a larger RLP. EIP-2976 covers this, "Typed Transactions
over Gossip", although it's not very clear about the blob encoding.
In practice the extra `RLP(..)` applies to all arrays/sequences of transactions
that are to be RLP-encoded as a list. In principle, it should be all
aggregates (object fields etc.), but it's enough for us to enable it for all
arrays/sequences, as this is what's used in the protocol and EIP-2976.
Signed-off-by: Jamie Lokier <jamie@shareable.org>
Etan Kissling
Kim De Mey
andri lim
tersec
Jordan Hrycaj
Adam Spitz
zah
Jacek Sieka
oskarth
Jamie Lokier