Checkpoint

bindings/node.js/Makefile

@@ -3,8 +3,8 @@ clean:
 	rm -f ckzg.node
 	rm -f ckzg_wrap.cxx
 
-build: ../../src/c_kzg_4844.c
-	swig -c++ -javascript -node ckzg.swg
+build: ckzg.c ckzg.h
+	swig -javascript -node ckzg.swg
 	node-gyp rebuild
 	cp build/Release/ckzg.node .
 

bindings/node.js/binding.gyp

@@ -6,7 +6,7 @@
         'ckzg_wrap.cxx',
         '../../src/c_kzg_4844.c',
       ],
-      'include_dirs': [ '../../inc' ],
+      'include_dirs': [ '../../inc' ]
     },
   ]
 }

bindings/node.js/ckzg.c

@@ -0,0 +1,97 @@
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "c_kzg_4844.h"
+
+KZGSettings* loadTrustSetup(const char* file) {
+  KZGSettings* out = malloc(sizeof(KZGSettings));
+
+  if (out == NULL) return NULL;
+
+  FILE* f = fopen(file, "r");
+
+  if (f == NULL) { free(out); return NULL; }
+
+  if (load_trusted_setup(out, f) != C_KZG_OK) { free(out); return NULL; }
+
+  return out;
+}
+
+void freeTrustedSetup(KZGSettings *s) {
+  free_trusted_setup(s);
+  free(s);
+}
+
+void blobToKzgCommitment(uint8_t out[48], const uint8_t blob[FIELD_ELEMENTS_PER_BLOB * 32], const KZGSettings *s) {
+  Polynomial p;
+  for (size_t i = 0; i < FIELD_ELEMENTS_PER_BLOB; i++)
+    bytes_to_bls_field(&p[i], &blob[i * 32]);
+
+  KZGCommitment c;
+  blob_to_kzg_commitment(&c, p, s);
+
+  bytes_from_g1(out, &c);
+}
+
+int verifyAggregateKzgProof(const uint8_t blobs[], const uint8_t commitments[], size_t n, const uint8_t proof[48], const KZGSettings *s) {
+  Polynomial* p = calloc(n, sizeof(Polynomial));
+  if (p == NULL) return -1;
+
+  KZGCommitment* c = calloc(n, sizeof(KZGCommitment));
+  if (c == NULL) { free(p); return -1; }
+
+  C_KZG_RET ret;
+
+  for (size_t i = 0; i < n; i++) {
+    for (size_t j = 0; j < FIELD_ELEMENTS_PER_BLOB; j++)
+      bytes_to_bls_field(&p[i][j], &blobs[i * FIELD_ELEMENTS_PER_BLOB * 32 + j * 32]);
+    ret = bytes_to_g1(&c[i], &commitments[i * 48]);
+    if (ret != C_KZG_OK) { free(c); free(p); return -1; }
+  }
+
+  KZGProof f;
+  ret = bytes_to_g1(&f, proof);
+  if (ret != C_KZG_OK) { free(c); free(p); return -1; }
+
+  bool b;
+  ret = verify_aggregate_kzg_proof(&b, p, c, n, &f, s);
+  if (ret != C_KZG_OK) { free(c); free(p); return -1; }
+
+  free(c); free(p);
+  return b ? 0 : 1;
+}
+
+C_KZG_RET computeAggregateKzgProof(uint8_t out[48], const uint8_t blobs[], size_t n, const KZGSettings *s) {
+  Polynomial* p = calloc(n, sizeof(Polynomial));
+  if (p == NULL) return -1;
+
+  for (size_t i = 0; i < n; i++)
+    for (size_t j = 0; j < FIELD_ELEMENTS_PER_BLOB; j++)
+      bytes_to_bls_field(&p[i][j], &blobs[i * FIELD_ELEMENTS_PER_BLOB * 32 + j * 32]);
+
+  KZGProof f;
+  C_KZG_RET ret = compute_aggregate_kzg_proof(&f, p, n, s);
+
+  free(p);
+  if (ret != C_KZG_OK) return ret;
+
+  bytes_from_g1(out, &f);
+  return C_KZG_OK;
+}
+
+int verifyKzgProof(const uint8_t c[48], const uint8_t x[32], const uint8_t y[32], const uint8_t p[48], KZGSettings *s) {
+  KZGCommitment commitment;
+  KZGProof proof;
+  BLSFieldElement fx, fy;
+  bool out;
+
+  bytes_to_bls_field(&fx, x);
+  bytes_to_bls_field(&fy, y);
+  if (bytes_to_g1(&commitment, c) != C_KZG_OK) return -1;
+  if (bytes_to_g1(&proof, p) != C_KZG_OK) return -1;
+
+  if (verify_kzg_proof(&out, &commitment, &fx, &fy, &proof, s) != C_KZG_OK)
+    return -2;
+
+  return out ? 0 : 1;
+}

bindings/node.js/ckzg.h

@@ -0,0 +1,16 @@
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "c_kzg_4844.h"
+
+KZGSettings* loadTrustSetup(const char* file);
+
+void freeTrustedSetup(KZGSettings *s);
+
+void blobToKzgCommitment(uint8_t out[48], const uint8_t blob[FIELD_ELEMENTS_PER_BLOB * 32], const KZGSettings *s);
+
+int verifyKzgProof(const uint8_t c[48], const uint8_t x[32], const uint8_t y[32], const uint8_t p[48], KZGSettings *s);
+
+int verifyAggregateKzgProof(const uint8_t blobs[], const uint8_t commitments[], size_t n, const uint8_t proof[48], const KZGSettings *s);
+
+C_KZG_RET computeAggregateKzgProof(uint8_t out[48], const uint8_t blobs[], size_t n, const KZGSettings *s);

bindings/node.js/ckzg.swg

@@ -2,34 +2,6 @@
 %module ckzg
 
 %{
-#include "../../src/c_kzg_4844.h"
+#include "ckzg.h"
 %}
-
-extern C_KZG_RET load_trusted_setup(KZGSettings *out,
-    FILE *in);
-
-extern void free_trusted_setup(
-    KZGSettings *s);
-
-extern C_KZG_RET compute_aggregate_kzg_proof(KZGProof *out,
-    const Polynomial blobs[],
-    size_t n,
-    const KZGSettings *s);
-
-extern C_KZG_RET verify_aggregate_kzg_proof(bool *out,
-    const Polynomial blobs[],
-    const KZGCommitment expected_kzg_commitments[],
-    size_t n,
-    const KZGProof *kzg_aggregated_proof,
-    const KZGSettings *s);
-
-extern void blob_to_kzg_commitment(KZGCommitment *out,
-    const BLSFieldElement blob[FIELD_ELEMENTS_PER_BLOB],
-    const KZGSettings *s);
-
-extern C_KZG_RET verify_kzg_proof(bool *out,
-    const KZGCommitment *polynomial_kzg,
-    const BLSFieldElement *z,
-    const BLSFieldElement *y,
-    const KZGProof *kzg_proof,
-    const KZGSettings *s);
+%include "ckzg.h"

bindings/node.js/runnable.js

@@ -2,6 +2,8 @@
 
 console.log('testing...');
 
-const blst = require('ckzg');
+const kzg = require('ckzg');
 
-console.log(blst);
+console.log(kzg);
+
+kzg.testFunction();