* PoW wrapper for verification & mining
why:
It eases data management of per-Epoch lookup tables. Also some unit
tests show limits of usefulness on non-specialised machines for
mining besides developing tests.
details:
For PoW verification, this patch provides a pretty wrapper hiding the
details of the ethash/Hashimoto lookup cache management.
For mining on my development system without special hardware, the
underlying ethash functions are prohibitively slow. It takes
* ~20 minutes to prepare the full ethash/Hashimoto lookup dataset
* a second to run ~25k nonce tests (in the mining loop)
The mining part might be of some use for generating test data for
the tx-pool, though.
* Using PowRef as replacement for EpochHashCache + hashimotoLight()
* Fix typo (CI failed)
why:
was below log level when testing locally
* fix canonical naming
detected when running hive consensus simulator.
when processing an invalid block header and then
a new valid block header with the same block number,
the state root of the stateDB object should be updated
or reverted to parent stateRoot.
using intermediate stateRoot will trigger the hexary trie assertion.
previously, every time the VMState was created, it will also create
new stateDB, and this action will nullify the advantages of cached accounts.
the new changes will conserve the accounts cache if the executed blocks
are contiguous. if not the stateDB need to be reinited.
this changes also allow rpcCallEvm and rpcEstimateGas executed properly
using current stateDB instead of creating new one each time they are called.
Fixes#868 "Gas usage consensus error at Mainnet block 6001128", and equivalent
on other networks. Mainnet sync is able to continue past 6001128 after this.
Here's a trace:
```
TRC 2021-09-29 15:13:21.532+01:00 Persisting blocks file=persist_blocks.nim:43 fromBlock=6000961 toBlock=6001152
...
DBG 2021-09-29 15:14:35.925+01:00 gasUsed neq cumulativeGasUsed file=process_block.nim:68 gasUsed=7999726 cumulativeGasUsed=7989726
TRC 2021-09-29 15:14:35.925+01:00 peer disconnected file=blockchain_sync.nim:407 peer=<PEER:IP>
```
Similar output is seen at many blocks in the range 6001128..6001204.
The bug is when handling a combination of `CREATE` or `CREATE2`, along with
`SELFDESTRUCT` applied to the new contract address.
Init code for a contract can't return non-empty code and do `SELFDESTRUCT` at
the same time, because `SELFDESTRUCT` returns empty data.
But it is possible to return non-empty code in a newly created, self-destructed
account if the init code calls `DELEGATECALL` or `CALLCODE` to other code which
uses `SELFDESTRUCT`.
In this case we must still charge gas and write the code. This shows on
Mainnet blocks 6001128..6001204, where the gas difference matters. The code
must be written because the new code can be called later in the transaction
too, before self-destruction wipes the account at the end.
There are actually three semantic changes here for a self-destructed, new
contract:
- Gas is charged.
- The code is written to the account.
- It can fail due to insufficient gas.
This patch almost exactly reverts a15805e4 "fix applyCreateMessage" from
2019-02-28. I wonder what that fixed.
Signed-off-by: Jamie Lokier <jamie@shareable.org>
Fixes an off by 1 error where `EIP170_CODE_SIZE_LIMIT` was being treated as the
lowest invalid value by EVM code, but the highest valid value by witness code.
To remove confusion, this is renamed to `EIP170_MAX_CODE_SIZE` with value
0x6000, which matches the name (`MAX_CODE_SIZE`) and value used for this limit
in [EIP-170](https://eips.ethereum.org/EIPS/eip-170).
Signed-off-by: Jamie Lokier <jamie@shareable.org>
Fixes#864 "Sync progress stops at Goerli block 4494913", and equivalent on
other networks.
The block body fetcher in `blockchain_sync.nim` had an incorrect assumption
about how peers respond to `GetBlockBodies`. It was issuing requests for N
block bodies and incorrectly handling replies which contained fewer than N
bodies.
Having received up to 192 headers in a batch, it split the range into smaller
`GetBlockBodies` requests, fetched each reply, then combined replies. The
effect was Nimbus requested batches of 128+64 block bodies, received gaps in
the reply sequence, then aborted.
That meant it repeatedly fetched data, then discarded it, and fetched it again,
dropping good peers in the process.
Aborted and restarted batches occurred with earlier blocks too, but this became
more pronounced until there were no suitable peers at batch 4494913..4495104.
Here's a trace:
```
TRC 2021-09-29 02:40:24.977+01:00 Requesting block headers file=blockchain_sync.nim:224 start=4494913 count=192 peer=<ENODE>
TRC 2021-09-29 02:40:24.977+01:00 >> Sending eth.GetBlockHeaders (0x03) file=protocol_eth65.nim:51 peer=<PEER> startBlock=4494913 max=192
TRC 2021-09-29 02:40:25.005+01:00 << Got reply eth.BlockHeaders (0x04) file=protocol_eth65.nim:51 peer=<PEER> count=192
TRC 2021-09-29 02:40:25.007+01:00 >> Sending eth.GetBlockBodies (0x05) file=protocol_eth65.nim:51 peer=<PEER> count=128
TRC 2021-09-29 02:40:25.209+01:00 << Got reply eth.BlockBodies (0x06) file=protocol_eth65.nim:51 peer=<PEER> count=13
TRC 2021-09-29 02:40:25.210+01:00 >> Sending eth.GetBlockBodies (0x05) file=protocol_eth65.nim:51 peer=<PEER> count=64
TRC 2021-09-29 02:40:25.290+01:00 << Got reply eth.BlockBodies (0x06) file=protocol_eth65.nim:51 peer=<PEER> count=64
WRN 2021-09-29 02:40:25.306+01:00 Bodies len != headers.len file=blockchain_sync.nim:276 bodies=77 headers=192
TRC 2021-09-29 02:40:25.306+01:00 peer disconnected file=blockchain_sync.nim:403 peer=<PEER>
TRC 2021-09-29 02:40:25.306+01:00 Finished obtaining blocks file=blockchain_sync.nim:303 peer=<PEER>
```
In practice, for modern peers, Nimbus received shorter replies than it assumed
depending on the block sizes on the chain. Geth/Erigon has 2MiB `BlockBodies`
response size soft limit. OpenEthereum has 4MiB.
Up to Berlin (EIP-2929), Nimbus's fetcher failed often, but there were still
some peers serving what Nimbus needed.
Just after the start of Berlin, at batch 4494913..4495104 on Goerli, zero peers
responded with full size replies for the whole batch, so Nimbus couldn't
progress past that point. But there was already a problem happening before
that for large blocks, dropping good peers and repeatedly fetching the same
block data.
Signed-off-by: Jamie Lokier <jamie@shareable.org>
pre EIP1559 max(gasCost) is tx.gasLimit * tx.gasPrice
the new EIP1559 max(gasCost) before the transaction can be executed is
tx.gasLimit * tx.maxFeePerGas
EIP-2718:
- chainID: Long! of Query
- chainID: Long of Transaction
EIP-1559:
- baseFeePerGas: BigInt of Block
- effectiveGasPrice: BigInt of Transaction
- maxFeePerGas: BigInt of Transaction
- maxPriorityFeePerGas: BigInt of Transaction
this is a preparation for migration to confutils based config
although there is still some getConfiguration usage in tests code
it will be removed after new config arrived
both clique epoch and clique period already checked in
newClique and will use default configuration they are not set.
this redundant check in sealing engine also failed with
some configuration where only one of them is set and the
other one not set.
Prior to this patch, top-level EVM executions and nested EVM executions did
their `getStorage` and other requests using a completely different set of host
functions. It was just unfinished, to get top-level "new" EVMC working.
This finishes the job - it stops using the old methods. Effect:
- Functionality added at the EVMC host level will be used by all EVM calls.
(The target here is Beam Sync).
- The old set of functions are no longer used, so they can be removed.
- When EVMC host call tracing is enabled (`showTxCalls = true`), it traces
the calls from nested EVM executions as well as top-level.
Signed-off-by: Jamie Lokier <jamie@shareable.org>
We've been filling a "vtable"-like at run time, but it's not necessary.
The new object is a global `let x = evmc_host_interface(...)`, we assume it's
initialised before the first use, and we take its address with `.unsafeAddr`.
(If we use `ref evmc_host_interface`, Nim decides (correctly) that the
functions which use it aren't GC-safe because it's a global.)
Signed-off-by: Jamie Lokier <jamie@shareable.org>
This combines two things, a C stack usage change with EVM nested calls
via EVMC, and changes to host call tracing.
Feature-wise, the tracing is improved:
- Storage keys and values are make more sense.
- The message/result/context objects are shown with all relevant fields.
- `call` trace is split into entry/exit, so these can be shown around the
called contract's operations, instead of only showing the `call` parameters
after the nested call is finished.
- Nested calls are indented, which helps to highlight the flow.
- C stack usage considerably reduced in nested calls when more functionality
is enabled (either tracing here, or other things to come).
This will seem like a minor patch, but C stack usage was the real motivation,
after plenty of time in the debugger.
Nobody cares about stack when `showTxCalls` (you can just use a big stack when
debugging). But these subtle changes around the `call` path were found to be
necessary for passing all tests when the EVMC nested call code is completed,
and that's a prerequisite for many things: async EVM, dynamic EVM, Beam Sync,
and to fix https://github.com/status-im/nimbus-eth1/issues/345.
Signed-off-by: Jamie Lokier <jamie@shareable.org>
The update for London (EIP-1559) in 1cdb30df ("bump nim-emvc with evmc revision
8.0.0 to 9.0.0") really bumped EVMC ABI version from 7.5 up to 9.
In other words, it skipped Berlin, going direct from Istanbul to London.
That was accompanied by EVMC changes in 05e9b891 ("EIP-3198: add baseFee op
code in nim-evm"), which added the API changes needed for London.
But the missing Berlin functions weren't added in the move to London.
As a result, our EVMC host became incompatible with Berlin, London, and really
all revisions of the ABI, and if a third party EVM was loaded, it crashed.
This commit adds the missing Berlin host support, and makes our ABI
binary-compatible with real EVMC again.
Signed-off-by: Jamie Lokier <jamie@shareable.org>
although they are technically different, but in reality,
many networks are using the same id for ChainId dan NetworkId.
in this commit, we set networkid from config file's chainId.
- allow clique period and epoch to be configured via config file
- this also activate poaEngine mode
- remove clique period configuration from cli to reduce confusion
- fix#786
As this branch of vm2 doesn't support EVMC, this EVMC-motivated change is only
required here for internal compatibility.
Signed-off-by: Jamie Lokier <jamie@shareable.org>
This changes fixes a bug in `CREATE2` ops when used with EVMC.
Because it changes the salt type, it affects non-EVMC code as well.
The salt was passed through EVMC with the wrong byte order, although this went
unnoticed as the Nimbus host flipped the byte order before using it.
This was found when running Nimbus with third-party EVM,
["evmone"](https://github.com/ethereum/evmone).
There are different ways to remedy this.
If treated as a number, Nimbus EVM would byte-flip the value when calling EVMC,
then Nimbus host would flip the received value. Finally, it would be flipped a
third time when generating the address in `generateSafeAddress`. The first two
flips can be eliminated by negotiation (like other numbers), but there would
always be one flip.
As a bit pattern, Nimbus EVM would flip the same way it does when dealing with
hashes on the stack (e.g. with `getBlockHash`). Nimbus host wouldn't flip at
all - and when using third-party EVMs there would be no flips in Nimbus.
Because this value is not for arithmetic, any bit pattern is valid, and there
shouldn't be any flips when using a third-party EVM, the bit-pattern
interpretation is favoured. The only flip is done in Nimbus EVM (and might be
eliminated in an optimised version).
As suggested, we'll define a new "opaque 256 bits" type to hold this value.
(Similar to `Hash256`, but the salt isn't necessarily a hash.)
Signed-off-by: Jamie Lokier <jamie@shareable.org>
Nimbus types generally use the bit count not the byte count, e.g. `UInt256`,
`Hash256`, so make `ZERO_HASH256` (which has type `Hash256`) fit this pattern.
Signed-off-by: Jamie Lokier <jamie@shareable.org>
Jordan Hrycaj
jangko
Kim De Mey
Jamie Lokier
bmoo