alloy_eips/eip7594/
sidecar.rs

1use crate::{
2    eip4844::{
3        Blob, BlobAndProofV2, BlobTransactionSidecar, Bytes48, BYTES_PER_BLOB,
4        BYTES_PER_COMMITMENT, BYTES_PER_PROOF,
5    },
6    eip7594::{CELLS_PER_EXT_BLOB, EIP_7594_WRAPPER_VERSION},
7};
8use alloc::{boxed::Box, vec::Vec};
9use alloy_primitives::B256;
10use alloy_rlp::{BufMut, Decodable, Encodable, Header};
11
12use super::{Decodable7594, Encodable7594};
13#[cfg(feature = "kzg")]
14use crate::eip4844::BlobTransactionValidationError;
15use crate::eip4844::VersionedHashIter;
16
17/// This represents a set of blobs, and its corresponding commitments and proofs.
18/// Proof type depends on the sidecar variant.
19///
20/// This type encodes and decodes the fields without an rlp header.
21#[derive(Clone, PartialEq, Eq, Hash, Debug, derive_more::From)]
22#[cfg_attr(feature = "serde", derive(serde::Serialize))]
23#[cfg_attr(feature = "serde", serde(untagged))]
24#[cfg_attr(any(test, feature = "arbitrary"), derive(arbitrary::Arbitrary))]
25pub enum BlobTransactionSidecarVariant {
26    /// EIP-4844 style blob transaction sidecar.
27    Eip4844(BlobTransactionSidecar),
28    /// EIP-7594 style blob transaction sidecar with cell proofs.
29    Eip7594(BlobTransactionSidecarEip7594),
30}
31
32impl BlobTransactionSidecarVariant {
33    /// Returns true if this is a [`BlobTransactionSidecarVariant::Eip4844`].
34    pub const fn is_eip4844(&self) -> bool {
35        matches!(self, Self::Eip4844(_))
36    }
37
38    /// Returns true if this is a [`BlobTransactionSidecarVariant::Eip7594`].
39    pub const fn is_eip7594(&self) -> bool {
40        matches!(self, Self::Eip7594(_))
41    }
42
43    /// Returns the EIP-4844 sidecar if it is [`Self::Eip4844`].
44    pub const fn as_eip4844(&self) -> Option<&BlobTransactionSidecar> {
45        match self {
46            Self::Eip4844(sidecar) => Some(sidecar),
47            _ => None,
48        }
49    }
50
51    /// Returns the EIP-7594 sidecar if it is [`Self::Eip7594`].
52    pub const fn as_eip7594(&self) -> Option<&BlobTransactionSidecarEip7594> {
53        match self {
54            Self::Eip7594(sidecar) => Some(sidecar),
55            _ => None,
56        }
57    }
58
59    /// Converts into EIP-4844 sidecar if it is [`Self::Eip4844`].
60    pub fn into_eip4844(self) -> Option<BlobTransactionSidecar> {
61        match self {
62            Self::Eip4844(sidecar) => Some(sidecar),
63            _ => None,
64        }
65    }
66
67    /// Converts the EIP-7594 sidecar if it is [`Self::Eip7594`].
68    pub fn into_eip7594(self) -> Option<BlobTransactionSidecarEip7594> {
69        match self {
70            Self::Eip7594(sidecar) => Some(sidecar),
71            _ => None,
72        }
73    }
74
75    /// Calculates a size heuristic for the in-memory size of the [BlobTransactionSidecarVariant].
76    #[inline]
77    pub fn size(&self) -> usize {
78        match self {
79            Self::Eip4844(sidecar) => sidecar.size(),
80            Self::Eip7594(sidecar) => sidecar.size(),
81        }
82    }
83
84    /// Verifies that the sidecar is valid. See relevant methods for each variant for more info.
85    #[cfg(feature = "kzg")]
86    pub fn validate(
87        &self,
88        blob_versioned_hashes: &[B256],
89        proof_settings: &c_kzg::KzgSettings,
90    ) -> Result<(), BlobTransactionValidationError> {
91        match self {
92            Self::Eip4844(sidecar) => sidecar.validate(blob_versioned_hashes, proof_settings),
93            Self::Eip7594(sidecar) => sidecar.validate(blob_versioned_hashes, proof_settings),
94        }
95    }
96
97    /// Returns the commitments of the sidecar.
98    pub fn commitments(&self) -> &[Bytes48] {
99        match self {
100            Self::Eip4844(sidecar) => &sidecar.commitments,
101            Self::Eip7594(sidecar) => &sidecar.commitments,
102        }
103    }
104
105    /// Returns an iterator over the versioned hashes of the commitments.
106    pub fn versioned_hashes(&self) -> VersionedHashIter<'_> {
107        VersionedHashIter::new(self.commitments())
108    }
109
110    /// Returns the index of the versioned hash in the commitments vector.
111    pub fn versioned_hash_index(&self, hash: &B256) -> Option<usize> {
112        match self {
113            Self::Eip4844(s) => s.versioned_hash_index(hash),
114            Self::Eip7594(s) => s.versioned_hash_index(hash),
115        }
116    }
117
118    /// Returns the blob corresponding to the versioned hash, if it exists.
119    pub fn blob_by_versioned_hash(&self, hash: &B256) -> Option<&Blob> {
120        match self {
121            Self::Eip4844(s) => s.blob_by_versioned_hash(hash),
122            Self::Eip7594(s) => s.blob_by_versioned_hash(hash),
123        }
124    }
125
126    /// Outputs the RLP length of the [BlobTransactionSidecarVariant] fields, without a RLP header.
127    #[doc(hidden)]
128    pub fn rlp_encoded_fields_length(&self) -> usize {
129        match self {
130            Self::Eip4844(sidecar) => sidecar.rlp_encoded_fields_length(),
131            Self::Eip7594(sidecar) => sidecar.rlp_encoded_fields_length(),
132        }
133    }
134
135    /// Encodes the inner [BlobTransactionSidecarVariant] fields as RLP bytes, __without__ a RLP
136    /// header.
137    #[inline]
138    #[doc(hidden)]
139    pub fn rlp_encode_fields(&self, out: &mut dyn BufMut) {
140        match self {
141            Self::Eip4844(sidecar) => sidecar.rlp_encode_fields(out),
142            Self::Eip7594(sidecar) => sidecar.rlp_encode_fields(out),
143        }
144    }
145
146    /// RLP decode the fields of a [BlobTransactionSidecarVariant] based on the wrapper version.
147    #[doc(hidden)]
148    pub fn rlp_decode_fields(buf: &mut &[u8]) -> alloy_rlp::Result<Self> {
149        Self::decode_7594(buf)
150    }
151}
152
153impl Encodable for BlobTransactionSidecarVariant {
154    /// Encodes the [BlobTransactionSidecar] fields as RLP bytes, without a RLP header.
155    fn encode(&self, out: &mut dyn BufMut) {
156        match self {
157            Self::Eip4844(sidecar) => sidecar.encode(out),
158            Self::Eip7594(sidecar) => sidecar.encode(out),
159        }
160    }
161
162    fn length(&self) -> usize {
163        match self {
164            Self::Eip4844(sidecar) => sidecar.rlp_encoded_length(),
165            Self::Eip7594(sidecar) => sidecar.rlp_encoded_length(),
166        }
167    }
168}
169
170impl Decodable for BlobTransactionSidecarVariant {
171    /// Decodes the inner [BlobTransactionSidecar] fields from RLP bytes, without a RLP header.
172    fn decode(buf: &mut &[u8]) -> alloy_rlp::Result<Self> {
173        let header = Header::decode(buf)?;
174        if !header.list {
175            return Err(alloy_rlp::Error::UnexpectedString);
176        }
177        if buf.len() < header.payload_length {
178            return Err(alloy_rlp::Error::InputTooShort);
179        }
180        let remaining = buf.len();
181        let this = Self::rlp_decode_fields(buf)?;
182        if buf.len() + header.payload_length != remaining {
183            return Err(alloy_rlp::Error::UnexpectedLength);
184        }
185
186        Ok(this)
187    }
188}
189
190impl Encodable7594 for BlobTransactionSidecarVariant {
191    fn encode_7594_len(&self) -> usize {
192        self.rlp_encoded_fields_length()
193    }
194
195    fn encode_7594(&self, out: &mut dyn BufMut) {
196        self.rlp_encode_fields(out);
197    }
198}
199
200impl Decodable7594 for BlobTransactionSidecarVariant {
201    fn decode_7594(buf: &mut &[u8]) -> alloy_rlp::Result<Self> {
202        if buf.first() == Some(&EIP_7594_WRAPPER_VERSION) {
203            Ok(Self::Eip7594(Decodable7594::decode_7594(buf)?))
204        } else {
205            Ok(Self::Eip4844(Decodable7594::decode_7594(buf)?))
206        }
207    }
208}
209
210#[cfg(feature = "serde")]
211impl<'de> serde::Deserialize<'de> for BlobTransactionSidecarVariant {
212    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
213    where
214        D: serde::Deserializer<'de>,
215    {
216        #[derive(serde::Deserialize)]
217        #[serde(field_identifier, rename_all = "camelCase")]
218        enum Field {
219            Blobs,
220            Commitments,
221            Proofs,
222            CellProofs,
223        }
224
225        struct VariantVisitor;
226
227        impl<'de> serde::de::Visitor<'de> for VariantVisitor {
228            type Value = BlobTransactionSidecarVariant;
229
230            fn expecting(&self, formatter: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
231                formatter
232                    .write_str("a valid blob transaction sidecar (EIP-4844 or EIP-7594 variant)")
233            }
234
235            fn visit_map<M>(self, mut map: M) -> Result<Self::Value, M::Error>
236            where
237                M: serde::de::MapAccess<'de>,
238            {
239                let mut blobs = None;
240                let mut commitments = None;
241                let mut proofs = None;
242                let mut cell_proofs = None;
243
244                while let Some(key) = map.next_key()? {
245                    match key {
246                        Field::Blobs => blobs = Some(map.next_value()?),
247                        Field::Commitments => commitments = Some(map.next_value()?),
248                        Field::Proofs => proofs = Some(map.next_value()?),
249                        Field::CellProofs => cell_proofs = Some(map.next_value()?),
250                    }
251                }
252
253                let blobs = blobs.ok_or_else(|| serde::de::Error::missing_field("blobs"))?;
254                let commitments =
255                    commitments.ok_or_else(|| serde::de::Error::missing_field("commitments"))?;
256
257                match (cell_proofs, proofs) {
258                    (Some(cp), None) => {
259                        Ok(BlobTransactionSidecarVariant::Eip7594(BlobTransactionSidecarEip7594 {
260                            blobs,
261                            commitments,
262                            cell_proofs: cp,
263                        }))
264                    }
265                    (None, Some(pf)) => {
266                        Ok(BlobTransactionSidecarVariant::Eip4844(BlobTransactionSidecar {
267                            blobs,
268                            commitments,
269                            proofs: pf,
270                        }))
271                    }
272                    (None, None) => {
273                        Err(serde::de::Error::custom("Missing 'cellProofs' or 'proofs'"))
274                    }
275                    (Some(_), Some(_)) => Err(serde::de::Error::custom(
276                        "Both 'cellProofs' and 'proofs' cannot be present",
277                    )),
278                }
279            }
280        }
281
282        const FIELDS: &[&str] = &["blobs", "commitments", "proofs", "cellProofs"];
283        deserializer.deserialize_struct("BlobTransactionSidecarVariant", FIELDS, VariantVisitor)
284    }
285}
286
287/// This represents a set of blobs, and its corresponding commitments and cell proofs.
288///
289/// This type encodes and decodes the fields without an rlp header.
290#[derive(Clone, Default, PartialEq, Eq, Hash)]
291#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
292#[cfg_attr(any(test, feature = "arbitrary"), derive(arbitrary::Arbitrary))]
293#[cfg_attr(feature = "serde", serde(rename_all = "camelCase"))]
294pub struct BlobTransactionSidecarEip7594 {
295    /// The blob data.
296    #[cfg_attr(
297        all(debug_assertions, feature = "serde"),
298        serde(deserialize_with = "crate::eip4844::deserialize_blobs")
299    )]
300    pub blobs: Vec<Blob>,
301    /// The blob commitments.
302    pub commitments: Vec<Bytes48>,
303    /// List of cell proofs for all blobs in the sidecar, including the proofs for the extension
304    /// indices, for a total of `CELLS_PER_EXT_BLOB` proofs per blob (`CELLS_PER_EXT_BLOB` is the
305    /// number of cells for an extended blob, defined in
306    /// [the consensus specs](https://github.com/ethereum/consensus-specs/tree/9d377fd53d029536e57cfda1a4d2c700c59f86bf/specs/fulu/polynomial-commitments-sampling.md#cells))
307    pub cell_proofs: Vec<Bytes48>,
308}
309
310impl core::fmt::Debug for BlobTransactionSidecarEip7594 {
311    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
312        f.debug_struct("BlobTransactionSidecarEip7594")
313            .field("blobs", &self.blobs.len())
314            .field("commitments", &self.commitments)
315            .field("cell_proofs", &self.cell_proofs)
316            .finish()
317    }
318}
319
320impl BlobTransactionSidecarEip7594 {
321    /// Constructs a new [BlobTransactionSidecarEip7594] from a set of blobs, commitments, and
322    /// cell proofs.
323    pub const fn new(
324        blobs: Vec<Blob>,
325        commitments: Vec<Bytes48>,
326        cell_proofs: Vec<Bytes48>,
327    ) -> Self {
328        Self { blobs, commitments, cell_proofs }
329    }
330
331    /// Calculates a size heuristic for the in-memory size of the [BlobTransactionSidecarEip7594].
332    #[inline]
333    pub fn size(&self) -> usize {
334        self.blobs.len() * BYTES_PER_BLOB + // blobs
335               self.commitments.len() * BYTES_PER_COMMITMENT + // commitments
336               self.cell_proofs.len() * BYTES_PER_PROOF // proofs
337    }
338
339    /// Verifies that the versioned hashes are valid for this sidecar's blob data, commitments, and
340    /// proofs.
341    ///
342    /// Takes as input the [KzgSettings](c_kzg::KzgSettings), which should contain the parameters
343    /// derived from the KZG trusted setup.
344    ///
345    /// This ensures that the blob transaction payload has the expected number of blob data
346    /// elements, commitments, and proofs. The cells are constructed from each blob and verified
347    /// against the commitments and proofs.
348    ///
349    /// Returns [BlobTransactionValidationError::InvalidProof] if any blob KZG proof in the response
350    /// fails to verify, or if the versioned hashes in the transaction do not match the actual
351    /// commitment versioned hashes.
352    #[cfg(feature = "kzg")]
353    pub fn validate(
354        &self,
355        blob_versioned_hashes: &[B256],
356        proof_settings: &c_kzg::KzgSettings,
357    ) -> Result<(), BlobTransactionValidationError> {
358        // Ensure the versioned hashes and commitments have the same length.
359        if blob_versioned_hashes.len() != self.commitments.len() {
360            return Err(c_kzg::Error::MismatchLength(format!(
361                "There are {} versioned commitment hashes and {} commitments",
362                blob_versioned_hashes.len(),
363                self.commitments.len()
364            ))
365            .into());
366        }
367
368        let blobs_len = self.blobs.len();
369        let expected_cell_proofs_len = blobs_len * CELLS_PER_EXT_BLOB;
370        if self.cell_proofs.len() != expected_cell_proofs_len {
371            return Err(c_kzg::Error::MismatchLength(format!(
372                "There are {} cell proofs and {} blobs. Expected {} cell proofs.",
373                self.cell_proofs.len(),
374                blobs_len,
375                expected_cell_proofs_len
376            ))
377            .into());
378        }
379
380        // calculate versioned hashes by zipping & iterating
381        for (versioned_hash, commitment) in
382            blob_versioned_hashes.iter().zip(self.commitments.iter())
383        {
384            // calculate & verify versioned hash
385            let calculated_versioned_hash =
386                crate::eip4844::kzg_to_versioned_hash(commitment.as_slice());
387            if *versioned_hash != calculated_versioned_hash {
388                return Err(BlobTransactionValidationError::WrongVersionedHash {
389                    have: *versioned_hash,
390                    expected: calculated_versioned_hash,
391                });
392            }
393        }
394
395        // Repeat cell ranges for each blob.
396        let cell_indices =
397            Vec::from_iter((0..blobs_len).flat_map(|_| 0..CELLS_PER_EXT_BLOB as u64));
398
399        // Repeat commitments for each cell.
400        let mut commitments = Vec::with_capacity(blobs_len * CELLS_PER_EXT_BLOB);
401        for commitment in &self.commitments {
402            commitments.extend(core::iter::repeat_n(*commitment, CELLS_PER_EXT_BLOB));
403        }
404
405        // SAFETY: ALL types have the same size
406        let res = unsafe {
407            let mut cells = Vec::with_capacity(blobs_len * CELLS_PER_EXT_BLOB);
408            for blob in &self.blobs {
409                let blob = core::mem::transmute::<&Blob, &c_kzg::Blob>(blob);
410                cells.extend(proof_settings.compute_cells(blob)?.into_iter());
411            }
412
413            proof_settings.verify_cell_kzg_proof_batch(
414                // commitments
415                core::mem::transmute::<&[Bytes48], &[c_kzg::Bytes48]>(&commitments),
416                // cell indices
417                &cell_indices,
418                // cells
419                &cells,
420                // proofs
421                core::mem::transmute::<&[Bytes48], &[c_kzg::Bytes48]>(self.cell_proofs.as_slice()),
422            )?
423        };
424
425        res.then_some(()).ok_or(BlobTransactionValidationError::InvalidProof)
426    }
427
428    /// Returns an iterator over the versioned hashes of the commitments.
429    pub fn versioned_hashes(&self) -> VersionedHashIter<'_> {
430        VersionedHashIter::new(&self.commitments)
431    }
432
433    /// Returns the index of the versioned hash in the commitments vector.
434    pub fn versioned_hash_index(&self, hash: &B256) -> Option<usize> {
435        self.commitments.iter().position(|commitment| {
436            crate::eip4844::kzg_to_versioned_hash(commitment.as_slice()) == *hash
437        })
438    }
439
440    /// Returns the blob corresponding to the versioned hash, if it exists.
441    pub fn blob_by_versioned_hash(&self, hash: &B256) -> Option<&Blob> {
442        self.versioned_hash_index(hash).and_then(|index| self.blobs.get(index))
443    }
444
445    /// Matches versioned hashes and returns an iterator of (index, [`BlobAndProofV2`]) pairs
446    /// where index is the position in `versioned_hashes` that matched the versioned hash in the
447    /// sidecar.
448    ///
449    /// This is used for the `engine_getBlobsV2` RPC endpoint of the engine API
450    pub fn match_versioned_hashes<'a>(
451        &'a self,
452        versioned_hashes: &'a [B256],
453    ) -> impl Iterator<Item = (usize, BlobAndProofV2)> + 'a {
454        self.versioned_hashes().enumerate().flat_map(move |(i, blob_versioned_hash)| {
455            versioned_hashes.iter().enumerate().filter_map(move |(j, target_hash)| {
456                if blob_versioned_hash == *target_hash {
457                    let maybe_blob = self.blobs.get(i);
458                    let proof_range = i * CELLS_PER_EXT_BLOB..(i + 1) * CELLS_PER_EXT_BLOB;
459                    let maybe_proofs = Some(&self.cell_proofs[proof_range])
460                        .filter(|proofs| proofs.len() == CELLS_PER_EXT_BLOB);
461                    if let Some((blob, proofs)) = maybe_blob.copied().zip(maybe_proofs) {
462                        return Some((
463                            j,
464                            BlobAndProofV2 { blob: Box::new(blob), proofs: proofs.to_vec() },
465                        ));
466                    }
467                }
468                None
469            })
470        })
471    }
472
473    /// Outputs the RLP length of [BlobTransactionSidecarEip7594] fields without a RLP header.
474    #[doc(hidden)]
475    pub fn rlp_encoded_fields_length(&self) -> usize {
476        // wrapper version + blobs + commitments + cell proofs
477        1 + self.blobs.length() + self.commitments.length() + self.cell_proofs.length()
478    }
479
480    /// Encodes the inner [BlobTransactionSidecarEip7594] fields as RLP bytes, __without__ a
481    /// RLP header.
482    ///
483    /// This encodes the fields in the following order:
484    /// - `wrapper_version`
485    /// - `blobs`
486    /// - `commitments`
487    /// - `cell_proofs`
488    #[inline]
489    #[doc(hidden)]
490    pub fn rlp_encode_fields(&self, out: &mut dyn BufMut) {
491        // Put version byte.
492        out.put_u8(EIP_7594_WRAPPER_VERSION);
493        // Encode the blobs, commitments, and cell proofs
494        self.blobs.encode(out);
495        self.commitments.encode(out);
496        self.cell_proofs.encode(out);
497    }
498
499    /// Creates an RLP header for the [BlobTransactionSidecarEip7594].
500    fn rlp_header(&self) -> Header {
501        Header { list: true, payload_length: self.rlp_encoded_fields_length() }
502    }
503
504    /// Calculates the length of the [BlobTransactionSidecarEip7594] when encoded as
505    /// RLP.
506    pub fn rlp_encoded_length(&self) -> usize {
507        self.rlp_header().length() + self.rlp_encoded_fields_length()
508    }
509
510    /// Encodes the [BlobTransactionSidecarEip7594] as RLP bytes.
511    pub fn rlp_encode(&self, out: &mut dyn BufMut) {
512        self.rlp_header().encode(out);
513        self.rlp_encode_fields(out);
514    }
515
516    /// RLP decode the fields of a [BlobTransactionSidecarEip7594].
517    #[doc(hidden)]
518    pub fn rlp_decode_fields(buf: &mut &[u8]) -> alloy_rlp::Result<Self> {
519        Ok(Self {
520            blobs: Decodable::decode(buf)?,
521            commitments: Decodable::decode(buf)?,
522            cell_proofs: Decodable::decode(buf)?,
523        })
524    }
525
526    /// Decodes the [BlobTransactionSidecarEip7594] from RLP bytes.
527    pub fn rlp_decode(buf: &mut &[u8]) -> alloy_rlp::Result<Self> {
528        let header = Header::decode(buf)?;
529        if !header.list {
530            return Err(alloy_rlp::Error::UnexpectedString);
531        }
532        if buf.len() < header.payload_length {
533            return Err(alloy_rlp::Error::InputTooShort);
534        }
535        let remaining = buf.len();
536
537        let this = Self::decode_7594(buf)?;
538        if buf.len() + header.payload_length != remaining {
539            return Err(alloy_rlp::Error::UnexpectedLength);
540        }
541
542        Ok(this)
543    }
544}
545
546impl Encodable for BlobTransactionSidecarEip7594 {
547    /// Encodes the inner [BlobTransactionSidecarEip7594] fields as RLP bytes, without a RLP header.
548    fn encode(&self, out: &mut dyn BufMut) {
549        self.rlp_encode(out);
550    }
551
552    fn length(&self) -> usize {
553        self.rlp_encoded_length()
554    }
555}
556
557impl Decodable for BlobTransactionSidecarEip7594 {
558    /// Decodes the inner [BlobTransactionSidecarEip7594] fields from RLP bytes, without a RLP
559    /// header.
560    fn decode(buf: &mut &[u8]) -> alloy_rlp::Result<Self> {
561        Self::rlp_decode(buf)
562    }
563}
564
565impl Encodable7594 for BlobTransactionSidecarEip7594 {
566    fn encode_7594_len(&self) -> usize {
567        self.rlp_encoded_fields_length()
568    }
569
570    fn encode_7594(&self, out: &mut dyn BufMut) {
571        self.rlp_encode_fields(out);
572    }
573}
574
575impl Decodable7594 for BlobTransactionSidecarEip7594 {
576    fn decode_7594(buf: &mut &[u8]) -> alloy_rlp::Result<Self> {
577        let wrapper_version: u8 = Decodable::decode(buf)?;
578        if wrapper_version != EIP_7594_WRAPPER_VERSION {
579            return Err(alloy_rlp::Error::Custom("invalid wrapper version"));
580        }
581        Self::rlp_decode_fields(buf)
582    }
583}
584
585#[cfg(test)]
586mod tests {
587    use super::*;
588
589    #[test]
590    fn sidecar_variant_rlp_roundtrip() {
591        let mut encoded = Vec::new();
592
593        // 4844
594        let empty_sidecar_4844 =
595            BlobTransactionSidecarVariant::Eip4844(BlobTransactionSidecar::default());
596        empty_sidecar_4844.encode(&mut encoded);
597        assert_eq!(
598            empty_sidecar_4844,
599            BlobTransactionSidecarVariant::decode(&mut &encoded[..]).unwrap()
600        );
601
602        let sidecar_4844 = BlobTransactionSidecarVariant::Eip4844(BlobTransactionSidecar::new(
603            vec![Blob::default()],
604            vec![Bytes48::ZERO],
605            vec![Bytes48::ZERO],
606        ));
607        encoded.clear();
608        sidecar_4844.encode(&mut encoded);
609        assert_eq!(sidecar_4844, BlobTransactionSidecarVariant::decode(&mut &encoded[..]).unwrap());
610
611        // 7594
612        let empty_sidecar_7594 =
613            BlobTransactionSidecarVariant::Eip7594(BlobTransactionSidecarEip7594::default());
614        encoded.clear();
615        empty_sidecar_7594.encode(&mut encoded);
616        assert_eq!(
617            empty_sidecar_7594,
618            BlobTransactionSidecarVariant::decode(&mut &encoded[..]).unwrap()
619        );
620
621        let sidecar_7594 =
622            BlobTransactionSidecarVariant::Eip7594(BlobTransactionSidecarEip7594::new(
623                vec![Blob::default()],
624                vec![Bytes48::ZERO],
625                core::iter::repeat_n(Bytes48::ZERO, CELLS_PER_EXT_BLOB).collect(),
626            ));
627        encoded.clear();
628        sidecar_7594.encode(&mut encoded);
629        assert_eq!(sidecar_7594, BlobTransactionSidecarVariant::decode(&mut &encoded[..]).unwrap());
630    }
631
632    #[test]
633    #[cfg(feature = "serde")]
634    fn sidecar_variant_json_deserialize_sanity() {
635        let eip4844 = BlobTransactionSidecar::default();
636        let json = serde_json::to_string(&eip4844).unwrap();
637        let variant: BlobTransactionSidecarVariant = serde_json::from_str(&json).unwrap();
638        assert!(variant.is_eip4844());
639        let jsonvariant = serde_json::to_string(&variant).unwrap();
640        assert_eq!(json, jsonvariant);
641
642        let eip7594 = BlobTransactionSidecarEip7594::default();
643        let json = serde_json::to_string(&eip7594).unwrap();
644        let variant: BlobTransactionSidecarVariant = serde_json::from_str(&json).unwrap();
645        assert!(variant.is_eip7594());
646        let jsonvariant = serde_json::to_string(&variant).unwrap();
647        assert_eq!(json, jsonvariant);
648    }
649
650    #[test]
651    fn rlp_7594_roundtrip() {
652        let mut encoded = Vec::new();
653
654        let sidecar_4844 = BlobTransactionSidecar::default();
655        sidecar_4844.encode_7594(&mut encoded);
656        assert_eq!(sidecar_4844, Decodable7594::decode_7594(&mut &encoded[..]).unwrap());
657
658        let sidecar_variant_4844 = BlobTransactionSidecarVariant::Eip4844(sidecar_4844);
659        assert_eq!(sidecar_variant_4844, Decodable7594::decode_7594(&mut &encoded[..]).unwrap());
660        encoded.clear();
661        sidecar_variant_4844.encode_7594(&mut encoded);
662        assert_eq!(sidecar_variant_4844, Decodable7594::decode_7594(&mut &encoded[..]).unwrap());
663
664        let sidecar_7594 = BlobTransactionSidecarEip7594::default();
665        encoded.clear();
666        sidecar_7594.encode_7594(&mut encoded);
667        assert_eq!(sidecar_7594, Decodable7594::decode_7594(&mut &encoded[..]).unwrap());
668
669        let sidecar_variant_7594 = BlobTransactionSidecarVariant::Eip7594(sidecar_7594);
670        assert_eq!(sidecar_variant_7594, Decodable7594::decode_7594(&mut &encoded[..]).unwrap());
671        encoded.clear();
672        sidecar_variant_7594.encode_7594(&mut encoded);
673        assert_eq!(sidecar_variant_7594, Decodable7594::decode_7594(&mut &encoded[..]).unwrap());
674    }
675}
alloy_eips/eip7594/sidecar.rs

alloy_eips/eip7594/
sidecar.rs
