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        use core::fmt;
217
218        #[derive(serde::Deserialize, fmt::Debug)]
219        #[serde(field_identifier, rename_all = "camelCase")]
220        enum Field {
221            Blobs,
222            Commitments,
223            Proofs,
224            CellProofs,
225        }
226
227        struct VariantVisitor;
228
229        impl<'de> serde::de::Visitor<'de> for VariantVisitor {
230            type Value = BlobTransactionSidecarVariant;
231
232            fn expecting(&self, formatter: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
233                formatter
234                    .write_str("a valid blob transaction sidecar (EIP-4844 or EIP-7594 variant)")
235            }
236
237            fn visit_map<M>(self, mut map: M) -> Result<Self::Value, M::Error>
238            where
239                M: serde::de::MapAccess<'de>,
240            {
241                let mut blobs = None;
242                let mut commitments = None;
243                let mut proofs = None;
244                let mut cell_proofs = None;
245
246                while let Some(key) = map.next_key()? {
247                    match key {
248                        Field::Blobs => {
249                            blobs = Some(crate::eip4844::deserialize_blobs_map(&mut map)?);
250                        }
251                        Field::Commitments => commitments = Some(map.next_value()?),
252                        Field::Proofs => proofs = Some(map.next_value()?),
253                        Field::CellProofs => cell_proofs = Some(map.next_value()?),
254                    }
255                }
256
257                let blobs = blobs.ok_or_else(|| serde::de::Error::missing_field("blobs"))?;
258                let commitments =
259                    commitments.ok_or_else(|| serde::de::Error::missing_field("commitments"))?;
260
261                match (cell_proofs, proofs) {
262                    (Some(cp), None) => {
263                        Ok(BlobTransactionSidecarVariant::Eip7594(BlobTransactionSidecarEip7594 {
264                            blobs,
265                            commitments,
266                            cell_proofs: cp,
267                        }))
268                    }
269                    (None, Some(pf)) => {
270                        Ok(BlobTransactionSidecarVariant::Eip4844(BlobTransactionSidecar {
271                            blobs,
272                            commitments,
273                            proofs: pf,
274                        }))
275                    }
276                    (None, None) => {
277                        Err(serde::de::Error::custom("Missing 'cellProofs' or 'proofs'"))
278                    }
279                    (Some(_), Some(_)) => Err(serde::de::Error::custom(
280                        "Both 'cellProofs' and 'proofs' cannot be present",
281                    )),
282                }
283            }
284        }
285
286        const FIELDS: &[&str] = &["blobs", "commitments", "proofs", "cellProofs"];
287        deserializer.deserialize_struct("BlobTransactionSidecarVariant", FIELDS, VariantVisitor)
288    }
289}
290
291/// This represents a set of blobs, and its corresponding commitments and cell proofs.
292///
293/// This type encodes and decodes the fields without an rlp header.
294#[derive(Clone, Default, PartialEq, Eq, Hash)]
295#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
296#[cfg_attr(any(test, feature = "arbitrary"), derive(arbitrary::Arbitrary))]
297#[cfg_attr(feature = "serde", serde(rename_all = "camelCase"))]
298pub struct BlobTransactionSidecarEip7594 {
299    /// The blob data.
300    #[cfg_attr(feature = "serde", serde(deserialize_with = "crate::eip4844::deserialize_blobs"))]
301    pub blobs: Vec<Blob>,
302    /// The blob commitments.
303    pub commitments: Vec<Bytes48>,
304    /// List of cell proofs for all blobs in the sidecar, including the proofs for the extension
305    /// indices, for a total of `CELLS_PER_EXT_BLOB` proofs per blob (`CELLS_PER_EXT_BLOB` is the
306    /// number of cells for an extended blob, defined in
307    /// [the consensus specs](https://github.com/ethereum/consensus-specs/tree/9d377fd53d029536e57cfda1a4d2c700c59f86bf/specs/fulu/polynomial-commitments-sampling.md#cells))
308    pub cell_proofs: Vec<Bytes48>,
309}
310
311impl core::fmt::Debug for BlobTransactionSidecarEip7594 {
312    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
313        f.debug_struct("BlobTransactionSidecarEip7594")
314            .field("blobs", &self.blobs.len())
315            .field("commitments", &self.commitments)
316            .field("cell_proofs", &self.cell_proofs)
317            .finish()
318    }
319}
320
321impl BlobTransactionSidecarEip7594 {
322    /// Constructs a new [BlobTransactionSidecarEip7594] from a set of blobs, commitments, and
323    /// cell proofs.
324    pub const fn new(
325        blobs: Vec<Blob>,
326        commitments: Vec<Bytes48>,
327        cell_proofs: Vec<Bytes48>,
328    ) -> Self {
329        Self { blobs, commitments, cell_proofs }
330    }
331
332    /// Calculates a size heuristic for the in-memory size of the [BlobTransactionSidecarEip7594].
333    #[inline]
334    pub fn size(&self) -> usize {
335        self.blobs.len() * BYTES_PER_BLOB + // blobs
336               self.commitments.len() * BYTES_PER_COMMITMENT + // commitments
337               self.cell_proofs.len() * BYTES_PER_PROOF // proofs
338    }
339
340    /// Verifies that the versioned hashes are valid for this sidecar's blob data, commitments, and
341    /// proofs.
342    ///
343    /// Takes as input the [KzgSettings](c_kzg::KzgSettings), which should contain the parameters
344    /// derived from the KZG trusted setup.
345    ///
346    /// This ensures that the blob transaction payload has the expected number of blob data
347    /// elements, commitments, and proofs. The cells are constructed from each blob and verified
348    /// against the commitments and proofs.
349    ///
350    /// Returns [BlobTransactionValidationError::InvalidProof] if any blob KZG proof in the response
351    /// fails to verify, or if the versioned hashes in the transaction do not match the actual
352    /// commitment versioned hashes.
353    #[cfg(feature = "kzg")]
354    pub fn validate(
355        &self,
356        blob_versioned_hashes: &[B256],
357        proof_settings: &c_kzg::KzgSettings,
358    ) -> Result<(), BlobTransactionValidationError> {
359        // Ensure the versioned hashes and commitments have the same length.
360        if blob_versioned_hashes.len() != self.commitments.len() {
361            return Err(c_kzg::Error::MismatchLength(format!(
362                "There are {} versioned commitment hashes and {} commitments",
363                blob_versioned_hashes.len(),
364                self.commitments.len()
365            ))
366            .into());
367        }
368
369        let blobs_len = self.blobs.len();
370        let expected_cell_proofs_len = blobs_len * CELLS_PER_EXT_BLOB;
371        if self.cell_proofs.len() != expected_cell_proofs_len {
372            return Err(c_kzg::Error::MismatchLength(format!(
373                "There are {} cell proofs and {} blobs. Expected {} cell proofs.",
374                self.cell_proofs.len(),
375                blobs_len,
376                expected_cell_proofs_len
377            ))
378            .into());
379        }
380
381        // calculate versioned hashes by zipping & iterating
382        for (versioned_hash, commitment) in
383            blob_versioned_hashes.iter().zip(self.commitments.iter())
384        {
385            // calculate & verify versioned hash
386            let calculated_versioned_hash =
387                crate::eip4844::kzg_to_versioned_hash(commitment.as_slice());
388            if *versioned_hash != calculated_versioned_hash {
389                return Err(BlobTransactionValidationError::WrongVersionedHash {
390                    have: *versioned_hash,
391                    expected: calculated_versioned_hash,
392                });
393            }
394        }
395
396        // Repeat cell ranges for each blob.
397        let cell_indices =
398            Vec::from_iter((0..blobs_len).flat_map(|_| 0..CELLS_PER_EXT_BLOB as u64));
399
400        // Repeat commitments for each cell.
401        let mut commitments = Vec::with_capacity(blobs_len * CELLS_PER_EXT_BLOB);
402        for commitment in &self.commitments {
403            commitments.extend(core::iter::repeat_n(*commitment, CELLS_PER_EXT_BLOB));
404        }
405
406        // SAFETY: ALL types have the same size
407        let res = unsafe {
408            let mut cells = Vec::with_capacity(blobs_len * CELLS_PER_EXT_BLOB);
409            for blob in &self.blobs {
410                let blob = core::mem::transmute::<&Blob, &c_kzg::Blob>(blob);
411                cells.extend(proof_settings.compute_cells(blob)?.into_iter());
412            }
413
414            proof_settings.verify_cell_kzg_proof_batch(
415                // commitments
416                core::mem::transmute::<&[Bytes48], &[c_kzg::Bytes48]>(&commitments),
417                // cell indices
418                &cell_indices,
419                // cells
420                &cells,
421                // proofs
422                core::mem::transmute::<&[Bytes48], &[c_kzg::Bytes48]>(self.cell_proofs.as_slice()),
423            )?
424        };
425
426        res.then_some(()).ok_or(BlobTransactionValidationError::InvalidProof)
427    }
428
429    /// Returns an iterator over the versioned hashes of the commitments.
430    pub fn versioned_hashes(&self) -> VersionedHashIter<'_> {
431        VersionedHashIter::new(&self.commitments)
432    }
433
434    /// Returns the index of the versioned hash in the commitments vector.
435    pub fn versioned_hash_index(&self, hash: &B256) -> Option<usize> {
436        self.commitments.iter().position(|commitment| {
437            crate::eip4844::kzg_to_versioned_hash(commitment.as_slice()) == *hash
438        })
439    }
440
441    /// Returns the blob corresponding to the versioned hash, if it exists.
442    pub fn blob_by_versioned_hash(&self, hash: &B256) -> Option<&Blob> {
443        self.versioned_hash_index(hash).and_then(|index| self.blobs.get(index))
444    }
445
446    /// Matches versioned hashes and returns an iterator of (index, [`BlobAndProofV2`]) pairs
447    /// where index is the position in `versioned_hashes` that matched the versioned hash in the
448    /// sidecar.
449    ///
450    /// This is used for the `engine_getBlobsV2` RPC endpoint of the engine API
451    pub fn match_versioned_hashes<'a>(
452        &'a self,
453        versioned_hashes: &'a [B256],
454    ) -> impl Iterator<Item = (usize, BlobAndProofV2)> + 'a {
455        self.versioned_hashes().enumerate().flat_map(move |(i, blob_versioned_hash)| {
456            versioned_hashes.iter().enumerate().filter_map(move |(j, target_hash)| {
457                if blob_versioned_hash == *target_hash {
458                    let maybe_blob = self.blobs.get(i);
459                    let proof_range = i * CELLS_PER_EXT_BLOB..(i + 1) * CELLS_PER_EXT_BLOB;
460                    let maybe_proofs = Some(&self.cell_proofs[proof_range])
461                        .filter(|proofs| proofs.len() == CELLS_PER_EXT_BLOB);
462                    if let Some((blob, proofs)) = maybe_blob.copied().zip(maybe_proofs) {
463                        return Some((
464                            j,
465                            BlobAndProofV2 { blob: Box::new(blob), proofs: proofs.to_vec() },
466                        ));
467                    }
468                }
469                None
470            })
471        })
472    }
473
474    /// Outputs the RLP length of [BlobTransactionSidecarEip7594] fields without a RLP header.
475    #[doc(hidden)]
476    pub fn rlp_encoded_fields_length(&self) -> usize {
477        // wrapper version + blobs + commitments + cell proofs
478        1 + self.blobs.length() + self.commitments.length() + self.cell_proofs.length()
479    }
480
481    /// Encodes the inner [BlobTransactionSidecarEip7594] fields as RLP bytes, __without__ a
482    /// RLP header.
483    ///
484    /// This encodes the fields in the following order:
485    /// - `wrapper_version`
486    /// - `blobs`
487    /// - `commitments`
488    /// - `cell_proofs`
489    #[inline]
490    #[doc(hidden)]
491    pub fn rlp_encode_fields(&self, out: &mut dyn BufMut) {
492        // Put version byte.
493        out.put_u8(EIP_7594_WRAPPER_VERSION);
494        // Encode the blobs, commitments, and cell proofs
495        self.blobs.encode(out);
496        self.commitments.encode(out);
497        self.cell_proofs.encode(out);
498    }
499
500    /// Creates an RLP header for the [BlobTransactionSidecarEip7594].
501    fn rlp_header(&self) -> Header {
502        Header { list: true, payload_length: self.rlp_encoded_fields_length() }
503    }
504
505    /// Calculates the length of the [BlobTransactionSidecarEip7594] when encoded as
506    /// RLP.
507    pub fn rlp_encoded_length(&self) -> usize {
508        self.rlp_header().length() + self.rlp_encoded_fields_length()
509    }
510
511    /// Encodes the [BlobTransactionSidecarEip7594] as RLP bytes.
512    pub fn rlp_encode(&self, out: &mut dyn BufMut) {
513        self.rlp_header().encode(out);
514        self.rlp_encode_fields(out);
515    }
516
517    /// RLP decode the fields of a [BlobTransactionSidecarEip7594].
518    #[doc(hidden)]
519    pub fn rlp_decode_fields(buf: &mut &[u8]) -> alloy_rlp::Result<Self> {
520        Ok(Self {
521            blobs: Decodable::decode(buf)?,
522            commitments: Decodable::decode(buf)?,
523            cell_proofs: Decodable::decode(buf)?,
524        })
525    }
526
527    /// Decodes the [BlobTransactionSidecarEip7594] from RLP bytes.
528    pub fn rlp_decode(buf: &mut &[u8]) -> alloy_rlp::Result<Self> {
529        let header = Header::decode(buf)?;
530        if !header.list {
531            return Err(alloy_rlp::Error::UnexpectedString);
532        }
533        if buf.len() < header.payload_length {
534            return Err(alloy_rlp::Error::InputTooShort);
535        }
536        let remaining = buf.len();
537
538        let this = Self::decode_7594(buf)?;
539        if buf.len() + header.payload_length != remaining {
540            return Err(alloy_rlp::Error::UnexpectedLength);
541        }
542
543        Ok(this)
544    }
545}
546
547impl Encodable for BlobTransactionSidecarEip7594 {
548    /// Encodes the inner [BlobTransactionSidecarEip7594] fields as RLP bytes, without a RLP header.
549    fn encode(&self, out: &mut dyn BufMut) {
550        self.rlp_encode(out);
551    }
552
553    fn length(&self) -> usize {
554        self.rlp_encoded_length()
555    }
556}
557
558impl Decodable for BlobTransactionSidecarEip7594 {
559    /// Decodes the inner [BlobTransactionSidecarEip7594] fields from RLP bytes, without a RLP
560    /// header.
561    fn decode(buf: &mut &[u8]) -> alloy_rlp::Result<Self> {
562        Self::rlp_decode(buf)
563    }
564}
565
566impl Encodable7594 for BlobTransactionSidecarEip7594 {
567    fn encode_7594_len(&self) -> usize {
568        self.rlp_encoded_fields_length()
569    }
570
571    fn encode_7594(&self, out: &mut dyn BufMut) {
572        self.rlp_encode_fields(out);
573    }
574}
575
576impl Decodable7594 for BlobTransactionSidecarEip7594 {
577    fn decode_7594(buf: &mut &[u8]) -> alloy_rlp::Result<Self> {
578        let wrapper_version: u8 = Decodable::decode(buf)?;
579        if wrapper_version != EIP_7594_WRAPPER_VERSION {
580            return Err(alloy_rlp::Error::Custom("invalid wrapper version"));
581        }
582        Self::rlp_decode_fields(buf)
583    }
584}
585
586#[cfg(test)]
587mod tests {
588    use super::*;
589
590    #[test]
591    fn sidecar_variant_rlp_roundtrip() {
592        let mut encoded = Vec::new();
593
594        // 4844
595        let empty_sidecar_4844 =
596            BlobTransactionSidecarVariant::Eip4844(BlobTransactionSidecar::default());
597        empty_sidecar_4844.encode(&mut encoded);
598        assert_eq!(
599            empty_sidecar_4844,
600            BlobTransactionSidecarVariant::decode(&mut &encoded[..]).unwrap()
601        );
602
603        let sidecar_4844 = BlobTransactionSidecarVariant::Eip4844(BlobTransactionSidecar::new(
604            vec![Blob::default()],
605            vec![Bytes48::ZERO],
606            vec![Bytes48::ZERO],
607        ));
608        encoded.clear();
609        sidecar_4844.encode(&mut encoded);
610        assert_eq!(sidecar_4844, BlobTransactionSidecarVariant::decode(&mut &encoded[..]).unwrap());
611
612        // 7594
613        let empty_sidecar_7594 =
614            BlobTransactionSidecarVariant::Eip7594(BlobTransactionSidecarEip7594::default());
615        encoded.clear();
616        empty_sidecar_7594.encode(&mut encoded);
617        assert_eq!(
618            empty_sidecar_7594,
619            BlobTransactionSidecarVariant::decode(&mut &encoded[..]).unwrap()
620        );
621
622        let sidecar_7594 =
623            BlobTransactionSidecarVariant::Eip7594(BlobTransactionSidecarEip7594::new(
624                vec![Blob::default()],
625                vec![Bytes48::ZERO],
626                core::iter::repeat_n(Bytes48::ZERO, CELLS_PER_EXT_BLOB).collect(),
627            ));
628        encoded.clear();
629        sidecar_7594.encode(&mut encoded);
630        assert_eq!(sidecar_7594, BlobTransactionSidecarVariant::decode(&mut &encoded[..]).unwrap());
631    }
632
633    #[test]
634    #[cfg(feature = "serde")]
635    fn sidecar_variant_json_deserialize_sanity() {
636        let mut eip4844 = BlobTransactionSidecar::default();
637        eip4844.blobs.push(Blob::repeat_byte(0x2));
638
639        let json = serde_json::to_string(&eip4844).unwrap();
640        let variant: BlobTransactionSidecarVariant = serde_json::from_str(&json).unwrap();
641        assert!(variant.is_eip4844());
642        let jsonvariant = serde_json::to_string(&variant).unwrap();
643        assert_eq!(json, jsonvariant);
644
645        let mut eip7594 = BlobTransactionSidecarEip7594::default();
646        eip7594.blobs.push(Blob::repeat_byte(0x4));
647        let json = serde_json::to_string(&eip7594).unwrap();
648        let variant: BlobTransactionSidecarVariant = serde_json::from_str(&json).unwrap();
649        assert!(variant.is_eip7594());
650        let jsonvariant = serde_json::to_string(&variant).unwrap();
651        assert_eq!(json, jsonvariant);
652    }
653
654    #[test]
655    fn rlp_7594_roundtrip() {
656        let mut encoded = Vec::new();
657
658        let sidecar_4844 = BlobTransactionSidecar::default();
659        sidecar_4844.encode_7594(&mut encoded);
660        assert_eq!(sidecar_4844, Decodable7594::decode_7594(&mut &encoded[..]).unwrap());
661
662        let sidecar_variant_4844 = BlobTransactionSidecarVariant::Eip4844(sidecar_4844);
663        assert_eq!(sidecar_variant_4844, Decodable7594::decode_7594(&mut &encoded[..]).unwrap());
664        encoded.clear();
665        sidecar_variant_4844.encode_7594(&mut encoded);
666        assert_eq!(sidecar_variant_4844, Decodable7594::decode_7594(&mut &encoded[..]).unwrap());
667
668        let sidecar_7594 = BlobTransactionSidecarEip7594::default();
669        encoded.clear();
670        sidecar_7594.encode_7594(&mut encoded);
671        assert_eq!(sidecar_7594, Decodable7594::decode_7594(&mut &encoded[..]).unwrap());
672
673        let sidecar_variant_7594 = BlobTransactionSidecarVariant::Eip7594(sidecar_7594);
674        assert_eq!(sidecar_variant_7594, Decodable7594::decode_7594(&mut &encoded[..]).unwrap());
675        encoded.clear();
676        sidecar_variant_7594.encode_7594(&mut encoded);
677        assert_eq!(sidecar_variant_7594, Decodable7594::decode_7594(&mut &encoded[..]).unwrap());
678    }
679}
alloy_eips/eip7594/sidecar.rs

alloy_eips/eip7594/
sidecar.rs
