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Merge pull request #1 from Layr-Labs/encoding-lib
Encoding lib
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1 +1 @@ | ||
| test/resources/kzg/* | ||
| test/resources/kzg/* |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| package encoding | ||
|
|
||
| import ( | ||
| "errors" | ||
|
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| "github.com/Layr-Labs/eigenda/core" | ||
| enc "github.com/Layr-Labs/eigenda/pkg/encoding/encoder" | ||
| kzgEnc "github.com/Layr-Labs/eigenda/pkg/encoding/kzgEncoder" | ||
| "github.com/Layr-Labs/eigenda/pkg/kzg/bn254" | ||
| ) | ||
|
|
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| var ( | ||
| ErrConglomFeatureNotSupported = errors.New("conglomerate feature not supported") | ||
| ) | ||
|
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| type Conglomerate struct { | ||
| data [][]byte | ||
| header core.ConglomerateHeader | ||
| } | ||
|
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| func (c *Conglomerate) Data() [][]byte { | ||
| return c.data | ||
| } | ||
|
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| func (c *Conglomerate) Header() core.ConglomerateHeader { | ||
| return c.header | ||
| } | ||
|
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| func toEncParams(params core.EncodingParams) enc.EncodingParams { | ||
| return enc.EncodingParams{ | ||
| NumChunks: uint64(params.NumChunks), | ||
| ChunkLen: uint64(params.ChunkSize), | ||
| } | ||
| } | ||
|
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| type Encoder struct { | ||
| EncoderGroup kzgEnc.KzgEncoderGroup | ||
| } | ||
|
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| func (e *Encoder) Encode(data [][]byte, params core.EncodingParams) (core.ConglomerateCommitments, []core.Chunk, error) { | ||
|
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| encParams := toEncParams(params) | ||
|
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| encoder, err := e.EncoderGroup.GetKzgEncoder(encParams) | ||
| if err != nil { | ||
| return core.ConglomerateCommitments{}, nil, err | ||
| } | ||
| if len(data) != 1 { | ||
| return core.ConglomerateCommitments{}, nil, ErrConglomFeatureNotSupported | ||
| } | ||
|
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| blob := data[0] | ||
|
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| commit, lowDegreeProof, kzgFrames, _, err := encoder.EncodeBytes(blob) | ||
| if err != nil { | ||
| return core.ConglomerateCommitments{}, nil, ErrConglomFeatureNotSupported | ||
| } | ||
|
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| chunks := make([]core.Chunk, len(kzgFrames)) | ||
| for ind, frame := range kzgFrames { | ||
|
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| chunks[ind] = core.Chunk{ | ||
| Data: frame.Coeffs, | ||
| Proof: frame.Proof, | ||
| } | ||
|
|
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| } | ||
|
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| degree := uint(len(enc.ToFrArray(blob))) | ||
| commitments := core.ConglomerateCommitments{ | ||
| Commitment: commit, | ||
| DegreeProof: lowDegreeProof, | ||
| Degree: degree, | ||
| } | ||
|
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| return commitments, chunks, nil | ||
|
|
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| } | ||
|
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| func (e *Encoder) VerifyChunks(chunks []core.Chunk, indices []core.ChunkIndex, commitments core.ConglomerateCommitments, params core.EncodingParams) error { | ||
|
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| encParams := toEncParams(params) | ||
|
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| verifier, err := e.EncoderGroup.GetKzgVerifier(encParams) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| err = verifier.VerifyCommit(commitments.Commitment.(*bn254.G1Point), commitments.DegreeProof.(*bn254.G1Point), uint64(commitments.Degree)) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| for ind := range chunks { | ||
| err = verifier.VerifyFrame( | ||
| commitments.Commitment.(*bn254.G1Point), | ||
| chunks[ind].Data.(*kzgEnc.Frame), | ||
| uint64(indices[ind]), | ||
| ) | ||
|
|
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| if err != nil { | ||
| return err | ||
| } | ||
| } | ||
|
|
||
| return nil | ||
|
|
||
| } |
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