feat: implement EIP-4844 #668

DaniPopes · 2023-08-30T20:20:41Z

Implements EIP-4844.

Closes #526.
Supersedes #536.

Rjected

just adding some comments on how we might be able to configure the trusted setup from reth

Rjected · 2023-08-30T23:19:11Z

crates/precompile/build.rs

+fn generate_kzg_settings() {
+    let in_path = "src/kzg/trusted_setup.txt";
+    let out_path = "src/kzg/generated_settings.rs";
+
+    let in_path = Path::new(in_path);
+    println!("cargo:rerun-if-changed={}", in_path.display());
+    assert!(in_path.exists());
+    let contents = format_kzg_settings(in_path);
+    fs::write(out_path, contents).unwrap();
+}


makes sense - generating consts here makes creating the default kzgsettings easy, and does not require reading the file on startup etc

Rjected · 2023-08-30T23:19:21Z

crates/precompile/src/kzg/mod.rs

+fn get_kzg_settings() -> &'static KzgSettings {
+    static SETTINGS: OnceCell<KzgSettings> = OnceCell::new();
+    SETTINGS.get_or_init(|| {
+        c_kzg::KzgSettings::load_trusted_setup(
+            generated_settings::G1_POINTS,
+            generated_settings::G2_POINTS,
+        )
+        .expect("failed to load trusted setup")
+    })
+}


This makes sense given how the precompiles have to access the kzgsettings, but we need to be able to configure this from reth as well somehow.

Maybe we could have a static mut and use a pattern similar to this:
https://github.com/tokio-rs/tracing/blob/bf05c61b7234eb1a196ef8d30f773d3ea6b60ce9/tracing-core/src/dispatch.rs#L329-L366

To provide a way to set the KzgSettings in reth?

I believe they use static mut and manual atomic operations because of MSRV restrictions, once_cell is probably better

mattsse · 2023-08-31T00:38:39Z

just flagging that it probably should be Arc because KzgSettings is not clone

ref

https://github.com/paradigmxyz/reth/blob/893f4cf2a27034f4550d3f4443a0fa7c2cd2444b/bin/reth/src/node/mod.rs#L575-L585

mattsse · 2023-08-31T00:45:36Z

crates/precompile/src/lib.rs

+        static INSTANCE: OnceCell<Precompiles> = OnceCell::new();
+        INSTANCE.get_or_init(|| {
+            let mut precompiles = Self::berlin().clone();


for precompiles, we should consider either an enum

enum Precompile { Fun(fn(&[u8], u64) -> PrecompileResult), Fn(Arc<dyn Send + Sync + Fn(&[u8], u64) -> PrecompileResult) }

or always use the Arc variant,

and a static mut Precompile list that supports configuring global defaults

This is in my TODO list :)

hm we can simplify a lot of things about initialization by adding function signature that has CfgEnv input
No global initialization at all, and we set KzgSettings inside CfgEnv.

@DaniPopes @mattsse @Rjected wdyt?

No global initialization at all, and we set KzgSettings inside CfgEnv.

I am open to that, as long as we can set a default that's hard-coded to Cancun/Sepolia/.. mainnet?

No global initialization at all, and we set KzgSettings inside CfgEnv.

I am open to that, as long as we can set a default that's hard-coded to Cancun/Sepolia/.. mainnet?

yeah this seems much nicer than messing around with globals

DaniPopes · 2023-08-31T00:46:50Z

@mattsse
What's clone needed for? AFAIK you just need to pass the instance pointer into C, so I'm thinking just OnceCell<KzgSettings>

mattsse · 2023-08-31T00:49:06Z

What's clone needed for?

we need the KzgSettings in multiple locations (for example tx pool validation) and ideally, we just want to load it once.

mattsse · 2023-08-31T00:53:53Z

hmm, the way precompiles are currently used

let mut precompiles = Self::berlin().clone();

it's only really useful to allow custom default precompiles starting with cancun hardfork, pre-cancun this doesn't really make sense.

so actually not sure yet what the ideal static mut should look like.
perhaps just a single static mut specifically for the kzg precompile?

or perhaps just use the kzg settings in a static mut

DaniPopes · 2023-08-31T01:06:48Z

we need the KzgSettings in multiple locations (for example tx pool validation) and ideally, we just want to load it once.

You can store a local &'static KzgSettings or get it when needed with a global getter function. I don't think Arcs are needed here.

See #668 (comment) for static muts.

mattsse · 2023-08-31T01:17:35Z

okay @Rjected I figured out how the hardfork precompiles are currently instantiated, and since we only need to access the KzgSettings once, a static Lazy<Mutex<Arc<KzgSettings>> should be enough to support custom KzgSettings if set at the start of the program

DaniPopes · 2023-08-31T03:19:39Z

crates/precompile/src/blob/kzg_settings/mod.rs

@@ -0,0 +1,33 @@
+use c_kzg::KzgSettings;


This module is exported, lmk wyt @Rjected @mattsse

I tend not to usemod inside revm

I think it makes sense here for now, kzg_settings::set_global like tracing::subscriber::set_global_default. It's equivalent of a ZST struct with the module functions as static methods on it. In the future we can think of a better solution.

With EnvCfg path of setting kzg setting, this is unnecessary.

crates/interpreter/src/instructions/host_env.rs

crates/precompile/build.rs

gakonst · 2023-08-31T16:51:13Z

crates/precompile/build.rs

+    // TODO: We can use `hex_literal` to reduce file size
+    // load g1 points
+    let mut g1_points = Vec::with_capacity(n_g1);
+    for _ in 0..n_g1 {
+        let line = lines.next().unwrap();
+        let mut bytes = [0; BYTES_PER_G1_POINT];
+        hex::decode_to_slice(line, &mut bytes).unwrap();
+        g1_points.push(bytes);
+    }
+
+    // load g2 points
+    let mut g2_points = Vec::with_capacity(n_g2);
+    for _ in 0..n_g2 {
+        let line = lines.next().unwrap();
+        let mut bytes = [0; BYTES_PER_G2_POINT];
+        hex::decode_to_slice(line, &mut bytes).unwrap();
+        g2_points.push(bytes);
+    }


Nit but as discussed you don't need to read all the points right?

It's done at compile-time. There's only 2 methods exposed to init a KzgSettings, with the points bytes, or with a file path.

gakonst · 2023-08-31T16:51:51Z

crates/precompile/build.rs

+/*
+/// Pros:
+/// - no need to call `load_trusted_setup` at runtime
+///
+/// Cons:
+/// - larger runtime static size (722K = `4096*32 + 4096*144 + 65*288`)
+/// - larger generated file size (2M)
+/// - possibly unsafe? `as_ptr() as *mut _`
+/// - depends on `c_kzg`; this might not matter much
+fn format_kzg_settings_large(in_path: &Path) -> String {


We should check about this w/ the c-kzg folks.

I think I'll delete the second option, it's way too big to have at runtime

crates/precompile/src/blob/mod.rs

gakonst · 2023-08-31T16:54:35Z

crates/precompile/src/lib.rs

+        static INSTANCE: OnceCell<Precompiles> = OnceCell::new();
+        INSTANCE.get_or_init(|| {
+            let mut precompiles = Self::berlin().clone();


No global initialization at all, and we set KzgSettings inside CfgEnv.

I am open to that, as long as we can set a default that's hard-coded to Cancun/Sepolia/.. mainnet?

bins/revme/src/statetest/runner.rs

mattsse · 2023-09-11T22:05:14Z

which would be the initial value of KzgSettings in the Env

this would require non-optional KzgSettings config, which would also make the static default for the cancun precompile redundant, I'd prefer this. Similar to how the default chain id is set to mainnet.

I guess we would still want a static for the default, which would be the initial value of KzgSettings in the Env

ah yes, as @Rjected already mentioned

sorry, for derailing this, I overlooked some of @rakita previous comments here. To which I agree, having reread them.

So we can get rid of the get_global_or_default etc., by adding kzg_settings: Arc<KzgSettings> to CfgEnv which is set to some default settings in Default for CfgEnv?

having non configurable default for the settings is fine I think, even if it requires more work in reth.

the issue with the precompiles remains, either we support Arc< dyn Fn> or as @Rjected suggested support a &CfgEnv argument

rakita · 2023-09-12T11:52:56Z

Unresolved things:

Remove unsafe: https://github.com/bluealloy/revm/pull/668/files#r1313344511
use EnvCfg for setting, feat: implement EIP-4844 #668 (comment) and another explanation here: feat: implement EIP-4844 #668 (comment)
Use Arc for easier cloning: feat: implement EIP-4844 #668 (comment)

rakita · 2023-09-14T12:59:32Z

~~Remove unsafe: https://github.com/bluealloy/revm/pull/668/files#r1313344511~~
Added here: ea2321f
~~use EnvCfg for setting, feat: implement EIP-4844 #668 (comment) and another explanation here: feat: implement EIP-4844 #668 (comment)~~
Moved here: ce19006
~~Use Arc for easier cloning: feat: implement EIP-4844 #668 (comment)~~
Arc was introduced when KzgSetting is moved to Env here: ce19006

Added c-kzg behind std flag, maybe this is just happening on macos as llvm by default does not include wasm32 targets, and because of this, the build is failing for wasm32-wasi, wasm32-unknown-unknown and wasm32-unknown-ecmascript, we can investigate this later.

@DaniPopes @mattsse can you take a look at the changes

mattsse

only doc nits

README.md

crates/precompile/src/kzg_point_evaluation.rs

crates/primitives/src/kzg/env_settings.rs

crates/primitives/src/kzg/generated.rs

crates/primitives/src/utilities.rs

crates/primitives/src/kzg/generated.rs

onbjerg

small qs/nits, overall looks good to me i think

crates/primitives/src/utilities.rs

crates/primitives/src/precompile.rs

Co-authored-by: Matthias Seitz <matthias.seitz@outlook.de>

mattsse

lgtm

mattsse · 2023-09-15T09:12:57Z

crates/precompile/src/kzg_point_evaluation.rs

+/// The input is encoded as follows:
+/// | versioned_hash |  z  |  y  | commitment | proof |
+/// |     32         | 32  | 32  |     48     |   48  |


DaniPopes

lgtm

rakita · 2023-09-15T11:57:49Z

Just to mention here, we have disabled some of ethereum/tests related to eip4844 that have expectException field set. As the state root is different from test expected value that is generated.

Those tests are:

"emptyBlobhashList.json" // '>=Cancun': TR_EMPTYBLOB
"wrongBlobhashVersion.json"  // '>=Cancun': TR_BLOBVERSION_INVALID
"createBlobhashTx.json" // '>=Cancun': TR_BLOBCREATE
"blobhashListBounds7.json" // ">=Cancun": "TR_BLOBLIST_OVERSIZE"

blobhashListBounds7 and blobhashListBounds6 are very similar but I am not sure why ListBound7 is marked as TR_BLOBLIST_OVERSIZE and it has different behaviour from ListBounds6.

Will treat this as tests not being aligned on what evm should do, and will check later. Additionally asked on Eth R&D discord here: https://discord.com/channels/595666850260713488/753271902520213625/1152206478816583770

crates/precompile/src/kzg_point_evaluation.rs

* feat: point evaluation precompile * feat: BLOBHASH opcode * refactor: revme runner * renames * export global kzg settings * feat: include kzg settings bytes with `include_bytes!` * build.rs: remove second option, update docs * revme: remove unused files and dead code * feat: implement remaining block and tx env fields * Add tests for helper functions, update constants * Add EIP-4844 EF tests to CI, skip outdated ones * chore: make skip_test more readable * Fix tests * Fix fmt * Fix lints, review * fix: validate new tx, block fields; add to balance check * Restore `load_access_list` * chore: drop c-kzg fork * test: update tests from Geth See: <ethereum/go-ethereum#28026> * chore: revert `is_create` change * chore: fmt toml * chore: unnecessary import * remove unsafe from fake_exponential * Remove kzg global settings, and move it to CfgEnv * enable kzg only in std. main README updated * fmt and clippy * Update README.md Co-authored-by: Matthias Seitz <matthias.seitz@outlook.de> * nits and docs * disable exception eip4844 tests, small refactor * revert back last commit refactor --------- Co-authored-by: rakita <dragan0rakita@gmail.com> Co-authored-by: Matthias Seitz <matthias.seitz@outlook.de> Co-authored-by: Waylon Jepsen <57912727+0xJepsen@users.noreply.github.com>

DaniPopes added 4 commits August 30, 2023 22:12

feat: point evaluation precompile

aefca60

feat: BLOBHASH opcode

3342e99

refactor: revme runner

92e627b

renames

37feea7

Rjected reviewed Aug 30, 2023

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mattsse reviewed Aug 31, 2023

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export global kzg settings

9c048b4

DaniPopes force-pushed the eip-4844 branch from dc2094a to 9c048b4 Compare August 31, 2023 03:17

DaniPopes commented Aug 31, 2023

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rakita mentioned this pull request Aug 31, 2023

Waylon/eip4844 #536

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feat: include kzg settings bytes with include_bytes!

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DaniPopes added 3 commits August 31, 2023 19:38

build.rs: remove second option, update docs

f4dbaf9

revme: remove unused files and dead code

7792a91

feat: implement remaining block and tx env fields

71a29cb

mattsse mentioned this pull request Aug 31, 2023

Reuse revm eip-4844 impls and constants paradigmxyz/reth#4444

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DaniPopes added 6 commits September 1, 2023 18:29

Add tests for helper functions, update constants

16ff92c

Add EIP-4844 EF tests to CI, skip outdated ones

8d94cc5

chore: make skip_test more readable

44e5bea

Merge branch 'main' into eip-4844

25f0b83

Fix tests

85d25bc

Fix fmt

8c02e4a

rakita reviewed Sep 1, 2023

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thedevbirb mentioned this pull request Sep 14, 2023

EIP-6780: SELFDESTRUCT only in same transaction #719

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rakita added 6 commits September 14, 2023 09:49

Merge remote-tracking branch 'origin/main' into eip4844

31807d2

remove unsafe from fake_exponential

ea2321f

Remove kzg global settings, and move it to CfgEnv

ce19006

enable kzg only in std. main README updated

3e6bf70

fmt and clippy

798bc90

Merge remote-tracking branch 'origin/main' into eip4844

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rakita and others added 2 commits September 15, 2023 00:40

Update README.md

54aad80

Co-authored-by: Matthias Seitz <matthias.seitz@outlook.de>

nits and docs

8820a34

mattsse approved these changes Sep 15, 2023

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DaniPopes commented Sep 15, 2023

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disable exception eip4844 tests, small refactor

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revert back last commit refactor

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rakita merged commit fa13fea into bluealloy:main Sep 15, 2023
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chore: release #973

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feat(membership): add DaniPopes from Reth protocolguild/documentation#159

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