Generate bindings using SWIG and node-gyp

bindings/node.js/.gitignore

@@ -1 +1,3 @@
 build
+ckzg.node
+ckzg_wrap.cxx

bindings/node.js/Makefile

@@ -0,0 +1,12 @@
+clean:
+	rm -rf build
+	rm -f ckzg.node
+	rm -f ckzg_wrap.cxx
+
+build: ../../src/c_kzg_4844.c
+	swig -c++ -javascript -node ckzg.swg
+	node-gyp rebuild
+	cp build/Release/ckzg.node .
+
+test:
+	env NODE_PATH=.: node runnable.js

bindings/node.js/binding.gyp

@@ -1,8 +1,9 @@
 {
   'targets': [
     {
-      'target_name': 'c-kzg',
+      'target_name': 'ckzg',
       'sources': [
+        'ckzg_wrap.cxx',
         '../../src/c_kzg_4844.c',
       ],
       'include_dirs': [ '../../inc' ],

bindings/node.js/ckzg.swg

@@ -0,0 +1,35 @@
+/* File : ckzg.swg */
+%module ckzg
+
+%{
+#include "../../src/c_kzg_4844.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);

bindings/node.js/runnable.js

@@ -0,0 +1,7 @@
+'use strict';
+
+console.log('testing...');
+
+const blst = require('ckzg');
+
+console.log(blst);

src/c_kzg_4844.c

@@ -904,7 +904,7 @@ static void g1_lincomb(g1_t *out, const g1_t *p, const fr_t *coeffs, const uint6
     }
 }
 
-void blob_to_kzg_commitment(KZGCommitment *out, const Polynomial blob, const KZGSettings *s) {
+void blob_to_kzg_commitment(KZGCommitment *out, const BLSFieldElement blob[FIELD_ELEMENTS_PER_BLOB], const KZGSettings *s) {
   g1_lincomb(out, s->g1_values, blob, FIELD_ELEMENTS_PER_BLOB);
 }
 

src/c_kzg_4844.h

@@ -108,7 +108,7 @@ C_KZG_RET verify_aggregate_kzg_proof(bool *out,
     const KZGSettings *s);
 
 void blob_to_kzg_commitment(KZGCommitment *out,
-    const Polynomial blob,
+    const BLSFieldElement blob[FIELD_ELEMENTS_PER_BLOB],
     const KZGSettings *s);
 
 C_KZG_RET verify_kzg_proof(bool *out,