README. test helpers: rename var

README.md

@@ -367,21 +367,44 @@ import { Field } from '@noble/curves/abstract/modular'; // finite field for mod
 import { sha256 } from '@noble/hashes/sha256'; // 3rd-party sha256() of type utils.CHash
 import { hmac } from '@noble/hashes/hmac'; // 3rd-party hmac() that will accept sha256()
 import { concatBytes, randomBytes } from '@noble/hashes/utils'; // 3rd-party utilities
+
+const hmacSha256 = (key: Uint8Array, ...msgs: Uint8Array[]) => hmac(sha256, key, concatBytes(...msgs));
+
+// secq256k1: cycle of secp256k1 with Fp/N flipped.
+// https://personaelabs.org/posts/spartan-ecdsa
+// https://zcash.github.io/halo2/background/curves.html#cycles-of-curves
 const secq256k1 = weierstrass({
-  // secq256k1: cycle of secp256k1 with Fp/N flipped.
-  // https://personaelabs.org/posts/spartan-ecdsa
-  // https://zcash.github.io/halo2/background/curves.html#cycles-of-curves
+  // Curve equation params a, b
   a: 0n,
   b: 7n,
+  // Field over which we'll do calculations
   Fp: Field(2n ** 256n - 432420386565659656852420866394968145599n),
+  // Curve order, total count of valid points in the field.
   n: 2n ** 256n - 2n ** 32n - 2n ** 9n - 2n ** 8n - 2n ** 7n - 2n ** 6n - 2n ** 4n - 1n,
+  // Base point (x, y) aka generator point
   Gx: 55066263022277343669578718895168534326250603453777594175500187360389116729240n,
   Gy: 32670510020758816978083085130507043184471273380659243275938904335757337482424n,
+
   hash: sha256,
-  hmac: (key: Uint8Array, ...msgs: Uint8Array[]) => hmac(sha256, key, concatBytes(...msgs)),
+  hmac: hmacSha256,
   randomBytes,
 });
 
+// NIST secp192r1 aka p192 https://www.secg.org/sec2-v2.pdf, https://neuromancer.sk/std/secg/secp192r1
+const secp192r1 = weierstrass({
+  a: BigInt('0xfffffffffffffffffffffffffffffffefffffffffffffffc'),
+  b: BigInt('0x64210519e59c80e70fa7e9ab72243049feb8deecc146b9b1'),
+  Fp: Field(BigInt('0xfffffffffffffffffffffffffffffffeffffffffffffffff')),
+  n: BigInt('0xffffffffffffffffffffffff99def836146bc9b1b4d22831'),
+  Gx: BigInt('0x188da80eb03090f67cbf20eb43a18800f4ff0afd82ff1012'),
+  Gy: BigInt('0x07192b95ffc8da78631011ed6b24cdd573f977a11e794811'),
+  h: BigInt(1),
+  hash: sha256,
+  hmac: hmacSha256,
+  randomBytes,
+});
+
+
 // Replace weierstrass() with weierstrassPoints() if you don't need ECDSA, hash, hmac, randomBytes
 ```
 

test/_more-curves.helpers.js

@@ -1,7 +1,7 @@
 /*! noble-curves - MIT License (c) 2022 Paul Miller (paulmillr.com) */
 import { createCurve } from '../esm/_shortw_utils.js';
 import { sha224, sha256 } from '@noble/hashes/sha256';
-import { Field as Fp } from '../esm/abstract/modular.js';
+import { Field } from '../esm/abstract/modular.js';
 
 // NIST secp192r1 aka p192
 // https://www.secg.org/sec2-v2.pdf, https://neuromancer.sk/std/secg/secp192r1
@@ -11,7 +11,7 @@ export const p192 = createCurve(
     a: BigInt('0xfffffffffffffffffffffffffffffffefffffffffffffffc'),
     b: BigInt('0x64210519e59c80e70fa7e9ab72243049feb8deecc146b9b1'),
     // Field over which we'll do calculations; 2n ** 192n - 2n ** 64n - 1n
-    Fp: Fp(BigInt('0xfffffffffffffffffffffffffffffffeffffffffffffffff')),
+    Fp: Field(BigInt('0xfffffffffffffffffffffffffffffffeffffffffffffffff')),
     // Curve order, total count of valid points in the field.
     n: BigInt('0xffffffffffffffffffffffff99def836146bc9b1b4d22831'),
     // Base point (x, y) aka generator point
@@ -30,7 +30,7 @@ export const p224 = createCurve(
     a: BigInt('0xfffffffffffffffffffffffffffffffefffffffffffffffffffffffe'),
     b: BigInt('0xb4050a850c04b3abf54132565044b0b7d7bfd8ba270b39432355ffb4'),
     // Field over which we'll do calculations;
-    Fp: Fp(BigInt('0xffffffffffffffffffffffffffffffff000000000000000000000001')),
+    Fp: Field(BigInt('0xffffffffffffffffffffffffffffffff000000000000000000000001')),
     // Curve order, total count of valid points in the field
     n: BigInt('0xffffffffffffffffffffffffffff16a2e0b8f03e13dd29455c5c2a3d'),
     // Base point (x, y) aka generator point