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Merge pull request #292 from jhkimqd/jihwan/loadtest-blob
feat: blob mode for loadtest
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,107 @@ | ||
| package loadtest | ||
|
|
||
| import ( | ||
| cryptorand "crypto/rand" | ||
| "crypto/sha256" | ||
| _ "embed" | ||
| "fmt" | ||
| "math/rand" | ||
|
|
||
| "github.com/ethereum/go-ethereum/common" | ||
| "github.com/ethereum/go-ethereum/crypto/kzg4844" | ||
| "github.com/ethereum/go-ethereum/params" | ||
|
|
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| "github.com/ethereum/go-ethereum/core/types" | ||
| ) | ||
|
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| type BlobCommitment struct { | ||
| Blob kzg4844.Blob | ||
| Commitment kzg4844.Commitment | ||
| Proof kzg4844.Proof | ||
| VersionedHash common.Hash | ||
| } | ||
|
|
||
| // generateRandomBlobData will generate random data to be used for blob encoding | ||
| func generateRandomBlobData(size int) ([]byte, error) { | ||
| data := make([]byte, size) | ||
| n, err := cryptorand.Read(data) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if n != size { | ||
| return nil, fmt.Errorf("Could not create random blob data with size %d: %v", size, err) | ||
| } | ||
| return data, nil | ||
| } | ||
|
|
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| // createBlob takes in randomly generated byte slice and commits it with KZG | ||
| func createBlob(data []byte) kzg4844.Blob { | ||
| blob := kzg4844.Blob{} | ||
| fieldIndex := -1 | ||
| for i := 0; i < len(data); i += 31 { | ||
| fieldIndex++ | ||
| if fieldIndex == params.BlobTxFieldElementsPerBlob { | ||
| break | ||
| } | ||
| max := i + 31 | ||
| if max > len(data) { | ||
| max = len(data) | ||
| } | ||
| copy(blob[fieldIndex*32+1:], data[i:max]) | ||
| } | ||
| return blob | ||
| } | ||
|
|
||
| // generateBlobCommitment will generate the values for BlobCommitment variables | ||
| func generateBlobCommitment(data []byte) (*BlobCommitment, error) { | ||
| dataLen := len(data) | ||
| if dataLen > params.BlobTxFieldElementsPerBlob*(params.BlobTxBytesPerFieldElement-1) { | ||
| return nil, fmt.Errorf("Blob data longer than allowed (length: %v, limit: %v)", dataLen, params.BlobTxFieldElementsPerBlob*(params.BlobTxBytesPerFieldElement-1)) | ||
| } | ||
| blobCommitment := BlobCommitment{ | ||
| Blob: createBlob(data), | ||
| } | ||
| var err error | ||
|
|
||
| // Generate blob commitment | ||
| blobCommitment.Commitment, err = kzg4844.BlobToCommitment(blobCommitment.Blob) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("Failed generating blob commitment: %w", err) | ||
| } | ||
|
|
||
| // Generate blob proof | ||
| blobCommitment.Proof, err = kzg4844.ComputeBlobProof(blobCommitment.Blob, blobCommitment.Commitment) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("Failed generating blob proof: %w", err) | ||
| } | ||
|
|
||
| // Build versioned hash | ||
| blobCommitment.VersionedHash = sha256.Sum256(blobCommitment.Commitment[:]) | ||
| blobCommitment.VersionedHash[0] = 0x01 | ||
| return &blobCommitment, nil | ||
| } | ||
|
|
||
| // appendBlobCommitment will append the generated BlobCommitment values to blob transaction specific variables | ||
| func appendBlobCommitment(tx *types.BlobTx) error { | ||
| var err error | ||
| var blobBytes []byte | ||
| var blobRefBytes []byte | ||
| blobLen := rand.Intn((params.BlobTxFieldElementsPerBlob * (params.BlobTxBytesPerFieldElement - 1)) - len(blobBytes)) | ||
| blobRefBytes, _ = generateRandomBlobData(blobLen) | ||
|
|
||
| if blobRefBytes == nil { | ||
| return fmt.Errorf("Unknown blob ref") | ||
| } | ||
| blobBytes = append(blobBytes, blobRefBytes...) | ||
|
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| blobCommitment, err := generateBlobCommitment(blobBytes) | ||
| if err != nil { | ||
| return fmt.Errorf("Invalid blob: %w", err) | ||
| } | ||
|
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| tx.BlobHashes = append(tx.BlobHashes, blobCommitment.VersionedHash) | ||
| tx.Sidecar.Blobs = append(tx.Sidecar.Blobs, blobCommitment.Blob) | ||
| tx.Sidecar.Commitments = append(tx.Sidecar.Commitments, blobCommitment.Commitment) | ||
| tx.Sidecar.Proofs = append(tx.Sidecar.Proofs, blobCommitment.Proof) | ||
| return nil | ||
| } |
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