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c-kzg-4844
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Simplify, given updated API

This commit is contained in:
dancoffman 2022-11-04 11:56:41 -07:00
parent ac65930b15
commit 062e4e0f30
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2 changed files with 16 additions and 25 deletions
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40
bindings/node.js/kzg.cxx
View File

@ -133,12 +133,8 @@ Napi::Value BlobToKzgCommitment(const Napi::CallbackInfo& info) {
auto kzg_settings = info[1].As<Napi::External<KZGSettings>>().Data();
Polynomial polynomial;
for (size_t i = 0; i < FIELD_ELEMENTS_PER_BLOB; i++)
bytes_to_bls_field(&polynomial[i], &blob[i * BYTES_PER_FIELD_ELEMENT]);
KZGCommitment commitment;
blob_to_kzg_commitment(&commitment, polynomial, kzg_settings);
blob_to_kzg_commitment(&commitment, blob, kzg_settings);
uint8_t commitment_bytes[BYTES_PER_COMMITMENT];
bytes_from_g1(commitment_bytes, &commitment);
@ -159,35 +155,31 @@ Napi::Value ComputeAggregateKzgProof(const Napi::CallbackInfo& info) {
auto kzg_settings = info[1].As<Napi::External<KZGSettings>>().Data();
auto blobs_count = blobs_param.Length();
auto polynomial = (Polynomial*)calloc(blobs_count, sizeof(Polynomial));
auto blobs = (Blob*)calloc(blobs_count, sizeof(Blob));
for (uint32_t blob_index = 0; blob_index < blobs_count; blob_index++) {
Napi::Value blob = blobs_param[blob_index];
auto blob_bytes = blob.As<Napi::Uint8Array>().Data();
for (size_t field_index = 0; field_index < FIELD_ELEMENTS_PER_BLOB; field_index++) {
bytes_to_bls_field(
&polynomial[blob_index][field_index],
&blob_bytes[field_index * BYTES_PER_FIELD_ELEMENT]
);
}
memcpy(blobs[blob_index], blob_bytes, BYTES_PER_BLOB);
}
KZGProof proof;
C_KZG_RET ret = compute_aggregate_kzg_proof(
&proof,
polynomial,
blobs,
blobs_count,
kzg_settings
);
free(polynomial);
if (ret != C_KZG_OK) {
Napi::Error::New(env, "Failed to compute proof")
.ThrowAsJavaScriptException();
free(blobs);
return env.Undefined();
};
free(blobs);
uint8_t proof_bytes[BYTES_PER_PROOF];
bytes_from_g1(proof_bytes, &proof);
return napi_typed_array_from_bytes(proof_bytes, BYTES_PER_PROOF, env);
@ -210,7 +202,8 @@ Napi::Value VerifyAggregateKzgProof(const Napi::CallbackInfo& info) {
auto proof_bytes = proof_param.As<Napi::Uint8Array>().Data();
auto blobs_count = blobs_param.Length();
auto polynomial = (Polynomial*)calloc(blobs_count, sizeof(Polynomial));
auto blobs = (Blob*)calloc(blobs_count, sizeof(Blob));
auto commitments = (KZGCommitment*)calloc(blobs_count, sizeof(KZGCommitment));
C_KZG_RET ret;
@ -220,10 +213,7 @@ Napi::Value VerifyAggregateKzgProof(const Napi::CallbackInfo& info) {
Napi::Value blob = blobs_param[blob_index];
auto blob_bytes = blob.As<Napi::Uint8Array>().Data();
// Populate the polynomial with a BLS field for each field element in the blob
for (size_t field_index = 0; field_index < FIELD_ELEMENTS_PER_BLOB; field_index++) {
bytes_to_bls_field(&polynomial[blob_index][field_index], &blob_bytes[field_index * BYTES_PER_FIELD_ELEMENT]);
}
memcpy(blobs[blob_index], blob_bytes, BYTES_PER_BLOB);
// Extract a G1 point for each commitment
Napi::Value commitment = comittments_param[blob_index];
@ -240,7 +230,7 @@ Napi::Value VerifyAggregateKzgProof(const Napi::CallbackInfo& info) {
).ThrowAsJavaScriptException();
free(commitments);
free(polynomial);
free(blobs);
return env.Null();
}
@ -250,7 +240,7 @@ Napi::Value VerifyAggregateKzgProof(const Napi::CallbackInfo& info) {
ret = bytes_to_g1(&proof, proof_bytes);
if (ret != C_KZG_OK) {
free(commitments);
free(polynomial);
free(blobs);
Napi::Error::New(env, "Invalid proof data")
.ThrowAsJavaScriptException();
@ -260,7 +250,7 @@ Napi::Value VerifyAggregateKzgProof(const Napi::CallbackInfo& info) {
bool verification_result;
ret = verify_aggregate_kzg_proof(
&verification_result,
polynomial,
blobs,
commitments,
blobs_count,
&proof,
@ -268,7 +258,7 @@ Napi::Value VerifyAggregateKzgProof(const Napi::CallbackInfo& info) {
);
if (ret != C_KZG_OK) {
free(commitments);
free(polynomial);
free(blobs);
Napi::Error::New(
env,
@ -278,7 +268,7 @@ Napi::Value VerifyAggregateKzgProof(const Napi::CallbackInfo& info) {
}
free(commitments);
free(polynomial);
free(blobs);
return Napi::Boolean::New(env, verification_result);
}

1
src/c_kzg_4844.h
View File

@ -38,6 +38,7 @@ extern "C" {
#define BYTES_PER_PROOF 48
#define FIELD_ELEMENTS_PER_BLOB 4096
#define BYTES_PER_FIELD_ELEMENT 32
#define BYTES_PER_BLOB FIELD_ELEMENTS_PER_BLOB * BYTES_PER_FIELD_ELEMENT
static const uint8_t FIAT_SHAMIR_PROTOCOL_DOMAIN[] = {70, 83, 66, 76, 79, 66, 86, 69, 82, 73, 70, 89, 95, 86, 49, 95}; // "FSBLOBVERIFY_V1_"
typedef blst_p1 g1_t; /**< Internal G1 group element type */