The simulator computed active precompiles from the base header, which is
incorrect when simulations cross fork boundaries. This change selects
precompiles using the current simulated header so the precompile set
matches the block’s number/time. It brings simulate in line with doCall,
tracing, and mining, and keeps precompile state overrides applied on the
correct epoch set.
This pr implements https://github.com/ethereum/go-ethereum/issues/32733
to make StateProcessor more customisable.
## Compatibility notes
This introduces a breaking change to users using geth EVM as a library.
The `NewStateProcessor` function now takes one parameter which has the
chainConfig embedded instead of 2 parameters.
This disables the tx gaslimit cap for eth_call and related RPC operations.
I don't like how this fix works. Ideally we'd be checking the tx
gaslimit somewhere else, like in the block validator, or any other place
that considers block transactions. Doing the check in StateTransition
means it affects all possible ways of executing a message.
The challenge is finding a place for this check that also triggers
correctly in tests where it is wanted. So for now, we are just combining
this with the EOA sender check for transactions. Both are disabled for
call-type messages.
Issue statement: when user requests eth_simulateV1 to return full
transaction objects, these objects always had an empty `from` field. The
reason is we lose the sender when translation the message into a
types.Transaction which is then later on serialized.
I did think of an alternative but opted to keep with this approach as it
keeps complexity at the edge. The alternative would be to pass down a
signer object to RPCMarshal* methods and define a custom signer which
keeps the senders in its state and doesn't attempt the signature
recovery.
Shout-out to @Gabriel-Trintinalia for discovering this issue. The gist
of it as follows:
When processing a block, we should provide the parent block as well as
the last 256 block hashes. Some of these parents data (specifically the
hash) was incorrect because even though during the processing of the
parent block we have updated the header, that header was not updating
the TransactionsRoot and ReceiptsRoot fields (types.NewBlock makes a new
copy of the header and changes it only on that instance).
---------
Co-authored-by: lightclient <lightclient@protonmail.com>
eth_simulate was not processing prague system calls for history contract and EL
requests resulting in inaccurate stateRoot and requestsRoot fields in the block.
This PR changes the signature of `CalcExcessBlobGas` to take in just
the header timestamp instead of the whole object. It also adds a sanity
check for the parent->child block order to `VerifyEIP4844Header`.
A clarification was made to EIP-7691 stating that at the fork boundary
it is required to use the target blob count associated with the head
block, rather than the parent as implemented here.
See for more: https://github.com/ethereum/EIPs/pull/9249
This change relocates the EVM tx context switching to the ApplyMessage function.
With this change, we can remove a lot of EVM.SetTxContext calls before
message execution.
### Tracing API changes
- This PR replaces the `GasPrice` field of the `VMContext` struct with
`BaseFee`. Users may instead take the effective gas price from
`tx.EffectiveGasTipValue(env.BaseFee)`.
---------
Co-authored-by: Sina Mahmoodi <itz.s1na@gmail.com>
This pull request refactors the EVM constructor by removing the
TxContext parameter.
The EVM object is frequently overused. Ideally, only a single EVM
instance should be created and reused throughout the entire state
transition of a block, with the transaction context switched as needed
by calling evm.SetTxContext.
Unfortunately, in some parts of the code, the EVM object is repeatedly
created, resulting in unnecessary complexity. This pull request is the
first step towards gradually improving and simplifying this setup.
---------
Co-authored-by: Martin Holst Swende <martin@swende.se>
This PR moves the logging/tracing-facilities out of `*state.StateDB`,
in to a wrapping struct which implements `vm.StateDB` instead.
In most places, it is a pretty straight-forward change:
- First, hoisting the invocations from state objects up to the statedb.
- Then making the mutation-methods simply return the previous value, so
that the external logging layer could log everything.
Some internal code uses the direct object-accessors to mutate the state,
particularly in testing and in setting up state overrides, which means
that these changes are unobservable for the hooked layer. Thus, configuring
the overrides are not necessarily part of the API we want to publish.
The trickiest part about the layering is that when the selfdestructs are
finally deleted during `Finalise`, there's the possibility that someone
sent some ether to it, which is burnt at that point, and thus needs to
be logged. The hooked layer reaches into the inner layer to figure out
these events.
In package `vm`, the conversion from `state.StateDB + hooks` into a
hooked `vm.StateDB` is performed where needed.
---------
Co-authored-by: Gary Rong <garyrong0905@gmail.com>
This is a successor PR to #25743. This PR is based on a new iteration of
the spec: https://github.com/ethereum/execution-apis/pull/484.
`eth_multicall` takes in a list of blocks, each optionally overriding
fields like number, timestamp, etc. of a base block. Each block can
include calls. At each block users can override the state. There are
extra features, such as:
- Include ether transfers as part of the logs
- Overriding precompile codes with evm bytecode
- Redirecting accounts to another address
## Breaking changes
This PR includes the following breaking changes:
- Block override fields of eth_call and debug_traceCall have had the
following fields renamed
- `coinbase` -> `feeRecipient`
- `random` -> `prevRandao`
- `baseFee` -> `baseFeePerGas`
---------
Co-authored-by: Gary Rong <garyrong0905@gmail.com>
Co-authored-by: Martin Holst Swende <martin@swende.se>
